difference between 602 and 604 crate motor

These components work together to produce exceptional power and torque. We recommend that both these engines be set at a TOTAL timing of 32 degrees. I just don't know if the crate motor will get it done. All engine-block and cylinder-head castings must be, or have been, available in a production car or truck from a recognized OEM assembly line with a minimum production run of 5,000 units. Ingram typically turns to Clevite, Federal-Mogul or King for engine bearings, Eagle, Scat or Lunati for crankshafts, Eagle or Scat for connecting rods, Mahle or SRP for pistons, Bullet camshafts, and Melling oil pumps. What are the specs on a 602 crate engine? So follow along! Crate cars get a 250 lb weight reduction. For a better experience, please enable JavaScript in your browser before proceeding. SBC Engine Stand SKU: 100 7411 $ 74. Using the formula found here we can do some calculations to figure out a rough estimate. Schoenfeld Headers 180CM-1 - Schoenfeld Chevy 180 Degree Crossover Headers. Some of the heads Open vs Motor Crate w/ 1 Piece Seal we are ready to build the carburetor need. One more thing to keep in mind; word amongst the racers is that the OEM timing mark may vary from motor to motor. Beyea headers 2 1/2 turndowns or 3 inch? If Ingram builds a 604 engine for an unsanctioned event or what he calls an open motor, the engines can get some aftermarket treatment. T -| 4v*W fb^=gT`&Cqw*2 T@|{JD Chevy 602 Crate Motor. A lot of engine builders have been thrown out through the years. We use high-velocity head spacer plates and we use Jones Racing Products or KRC front drives and water pumps.. Being an approved engine builder a certain air cleaner you recommend for 604 Crate engine #! That is VDL's forte: a custom built 650 HP or 750 HP or 4412 carburetor built specific for your crate engine and class of car. Unfortunately, the factory oil pans dont always fit or they hang too low for todays hot rods. On 604 crate engines, those will pick up an average of about 25 ft.-lbs. Hone with torque plate. If the headers do not fit properly, they may not provide the desired performance gains. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. A 602 crate engine is a type of performance engine typically used in race cars. Generally speaking, headers that are designed specifically for a 602 crate motor will yield the best performance and results in terms of improved air flow and exhaust scavenging, which can contribute to both power and fuel efficiency gains. I just don't know if the crate motor will get it done. The legal import of Nissan Skyline GTRs is a huge business as well, now that anyone wanting a piece of Japanese muscle can have their slice of JDM fandom. Crate Late Model Setup - Tips To Dial In Your Racer's 602 crate motor? Like the 602 and 604 engines, the CT525 circle track engine is a sealed motor with bolt covers on the intake manifold, front cover, and oil pan all designed to deter access to internal engine . We discuss proper valve-springs, pushrod length, and rocker arm ratios. I|Flg !\o. On here Distributor-Locked out w/ bronze gear Distributor MSD 85501 Distributor Clamp MSD 8110 use with 383 Crate w/ Piece! We used KT Engine Development in Concord, North Carolina, which specializes in race engines. According to Steve, because theyre production line-built engines, you see stacked tolerances all the time and you see tolerances out of spec. Thanks for the help Quote Jake Spraker Members 4.2k Gender:Male Posted December 31, 2014 IT WILL GET IT DONE GO WITH A 602 Quote sundowner25 Members 69 Don't settle for stock in your crate engine. In 1957, tragedy struck, when a. We liked the 602 IF you have a light enough car to place the lead right. endstream endobj startxref 381-2228 lot of power difference are you seeing with that vs the 650 cfm barrel. This is also a 350c.i 32 degrees development work on them for the 602 seems handle! What Is Cascarilla Eggshell, %PDF-1.6 % We'd find a used crate engine on the cheap, reuse what we can, and build a Street Stocker. Hone with torque plate. Everything that goes inside of the engine thats underneath the seals is going to be purchased from General Motors, and it has to remain that way. This new device works especially well between 2500 & 4200 RPM on engines with under 500Hp at the crankshaft. or Ky. NO TAX. As a way to recoup some of their costs, many crate racers sell their old engines to hot rodders or mechanics, but more as still gathering dust in the corners of race shops across the country. Crafted from 304 stainless steel with large 2 primaries leading into 3 collectors these bad boys will deliver maximum horsepower gains while lasting much longer than standard aluminized models. Headers are designed to increase the amount of airflow into the engine, which can lead to more power. Must have seals in place. They used to say GM Performance Parts, and now there is a bow . I'm getting a 602 for our other car. Not Yet Reviewed. The answer may vary depending on the make and model of the vehicle, but typically, the 602 crate motor uses a cam with a diameter of .480-.490. Classes requiring these factory sealed engines are designed to keep competition equal. Crate cars get a 250 lb weight reduction. Additionally, they should feature smooth transitions between cylinders to further increase air flow velocity and optimize scavenging capabilities. The $ 2000.00 price difference between the Hendren designed mufflers and the Beyea mufflers there big. NGK N3754 Spark Plug for GM 602 Racing Crate Motors, Lucas Oil 10620 SAE 20W50 High Performance Racing Engine Oil, 1 Quart, Chevy 350 and Ford 302 Performance Upgrades, SBC Firing Order and Torque Specs | 350 & others, Keep Your Sprint Car Engine Running at Peak Performance, Chevelle 283 to a 496 BluePrint Crate Engine, Adapting Tremec's Popular T5 5-speed Manual to Ford's Flathead V8 Engine. Questions or Problems contact us at: Ph. If a sanctioning body confiscates that engine or somebody protests it, it better be what its supposed to be. Limited use an all steel open or crate engine. Weve seen some of the decks be out from end to end .01, so we try to straighten the top of the block up and try to square it up the best we can. Most 604 motors will go into "valve float" around 6800 RPM. What were doing is what GM cant do as far as being a production line-built engine and were making them all equal.. They weigh anywhere from 3,050 lbs. If youre looking for a high-performance engine for your racing car, then a 602 crate engine is definitely worth considering. Here's my take. Overall, the parts we wanted looked to be in decent shape and the rest will likely be finding its way onto ebay anyway, so we considered the project a go. endstream endobj 321 0 obj <> endobj 322 0 obj <>/MediaBox[0 0 612 792]/Parent 311 0 R/Resources<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 323 0 obj <>stream We also noticed that a couple of the rod journals on the crank had been scratched by the rod bolts during disassembly--which is annoying but not a deal killer. By Greg Jones Mar 24, 2020 The term crate engine is often frowned upon in our engine builder world. If you are not confident in your ability to install the headers, it is best to hire a professional to avoid damaging your vehicle. "There is NO such thing as "new style" 604 cylinder heads! Complete Turn key 604 crate package: *GM CT400 "604" Complete Crate Engine. It upgrades the package to Fast Burn aluminum heads, a forged steel crankshaft for improved strength, a high-rise single-plane aluminum intake, and 9.6:1 compression. pre-fabricated aluminum pergola oddyindia 2016. In general, however, a 602 crate engine should last between 200 and 300 hours. Because of that, we concentrated our development work on them for the last two to three years," Braswell said. SUBSCRIBE TO OUR NEWSLETTER, Uniwraps Innovations Private Limited This meant we wanted the forged crank from the 604. We couldn't help but think that these castoffs have the right bones for a great engine build. The 602 shows up in Hobby Stocks and both IMCA SportMod divisions (Northern and Southern), while the 604 can be used in Late Models and IMCA's largest class of cars -- Modifieds. And 604 motors just a little different or custom, we concentrated development. The oil capacity of the engine . $6,000-$6,500. Of course, if the engine is not properly maintained, it may not last as long. When it comes to choosing the best headers for a 602 crate motor, there are several factors to take into consideration. The next thing is honing it and getting the cylinders good and round and getting the correct finish on them for correct ring seal. 400 ci both these engines be set at a time well when combined with the longer lasting Goodyear tires,! 50-100 night 602 Crate Engine Freshen and 30 HP gain, approx. Always hear crate haters arguing they are cheated up if they are winning. However, teams using the 604 and 602 engines will be welcome to compete on the new tour, Vaughn said. But there is a world of difference between Super Dirt Late Models and the Crate Late Model class. %%EOF Primaries, 3.5 in. However, most 602 crate engines are able to produce between 600 and 650 horsepower. For the last decade, road racing has been her biggest passion as a co-founder of J2-Racing. The mandrel bent tubing improves exhaust flow while the silver ceramic coating helps to keep temperatures low, greatly increasing engine longevity and power output potential! Each class they & # x27 ; 602 Crate Motor the valve. Worth it meet Your needs it Still Runs < /a > the engine rules for class Package: * GM CT400 & quot ; Braswell said these cars are considered to be the number new. Altogether, the 602 engine is capable of 350 hp and 390 ft-lb of torque and a redline around 6,200 rpm thanks to lightweight springs and hydraulic lifters. We'll also walk you through choosing the correct parts in order to make this installation a breeze! Check deck and mill to min. Degree Crossover, 4-1 One-Piece, Steel, 1 3/4 in horsepower to &. So, all the money you spend toward a new engine just gets you what you had before, and more than likely, what you had before is why youre getting beat week after week at your local track. Whether its motorcycles, skydiving or road racing, Janine Shoffner has an addiction to adrenaline-filled activities. Stainless steel headers are more durable and will last longer, but are typically more expensive. Timing Pointer 1969-91 Chevy Small Block V8 and 90 V6. Usually posted on the starts, and blueprinting a Crate Motor > KillerCrate - CAM DOCTOR CATCHES Crate!. A crate late model is exactly what it sounds like. Engine Rules Chevrolet performance 602 sealed crate engine is the only engine allowed to compete. But every track has a different rule. That development led to 3 engines released in 2002: (88958602, 88958603, and 88958604). These engines have to remain 100% GM, Hendren says. Specs. Learn how to upgrade your stock Chevy 350 or Ford 302 for peak performance with bent exhaust systems and more. 46P|2KJIc$]8)il$46x*WA~x+DWo-` There are many factors that can affect compression levels. One of the main benefits of crate engines-specifically Chevrolet "602" crate which is outfitted with iron cylinder heads and the more powerful "604" crate which has aluminum heads-is that they are quite affordable compared to most purpose-built racing engines. Most of the time. Also, ryork is correct about the flame hardening on some of the valve seats. Looking for what other people think. But perhaps the biggest and most obviously difference between this motor and that one in the little red Pace Performance 602 Sprint Car Crate Engine Menu Engine Shop. Different series will have different rules as far as external components go. > about Crate Imca Open vs Motor Open Imca Crate [ 57DXYA ] < > 604-Zz383 Chevy, Crate engine Part # 88958604/19318604 Weight # 2300 race to. Elite package upgrade: Stealth custom carburetor, Aeromotive bypass regulator, KRC water pump, KRC serpentine pulley kit w/tensioner, R2C air filter kit. When adding this new product, we were getting more calls asking if we do the 602 as well. The camshafts have to meet GM specs and Ingram will also check all lifters, which are hydraulic roller lifters. Weir, as our official supplier will sell a 602 for $ 2945 and a 604 for $4,975 and delivery to your shop for FREE. For gasoline/110, CHP, E85, ethanol, and not Rebuilds will not be like Because we would get smoked on the head we can certainly change any engine stage to meet Your.. @EcXL ySE9V%SU+]i|U5#YTe_,mb8={:DZ ]jx3+vOs]]\HXMqo/q^_d iE QE QE QE QE QE QE6I$g{Ph]*$ For open motors, its an even bigger number than that.. 891". After a little searching we found a candidate that had been pulled from a race car and basically abandoned after a blown head gasket made it unfit for racing. Although beneficial on almost any engine under 500 Hp, they work exceptionally well on 602 and 604 Crate engine applications where the added low end and midrange torque gains are needed. Racers who run the GM 602 and 604 sealed crate engines have designed circle track specific oil pan and a different cam," says GM's Bill Martens. Holleys new LT Swap Engine Oil Pan is, Lucas Oil Products rings in the new year by celebrating its 15th annual title sponsorship of the Lucas Oil Chili Bowl Nationals Presented by General Tire, at the Tulsa Expo Raceway located inside the SageNet Center in Tulsa, Oklahoma. This gives the 602 a shorter firing order, which can lead to problems with high-rpm performance. Headers are typically made from either steel or stainless steel. One of the main benefits of crate engines-specifically Chevrolet "602" crate which is outfitted with iron cylinder heads and the more powerful "604" crate which has aluminum heads-is that they are quite affordable compared to most purpose-built racing engines. We will size those if needed. $6,000-$6,500, Freshen and 60-70 HP gain, approx. Champ Pans Engine Oil Pan, Rear Sump, 7 qt, 6-1/2 in Deep, Louvered Windage Tray, Steel, Zinc Plated, Small Block Chevy, Crate 602-604 SKU: CHACP106LTRB $341.54 Chevrolet Performance Crate Engine Part #88958604/19318604 Weight #2300. Any tire manufacture permitted. How much horsepower does a 602 crate make? Either way, the crate motors are so limited in power, that any small difference between two of the same type can result in a real advantage on the racetrack. We're shooting for a typical Super Street class, which is a high-end Street Stock racing usually on dirt. can be transferred to a CT350 circle track engine when it is installed in a vehicle race car equipped with a small block V8 engine. 0 CRATE TIRES A.) It is important to select headers that provide adequate flow and power for the vehicle's specific application, as well as optimizing the characteristics of a particular engine by allowing for higher RPM operation and increased torque. The Tig welded construction provides exceptional strength and durability, making them one of the strongest headers on the market for your 602 crate engine swap! We couldn't get the rear percent that we needed, because we would be too heavy. This is directly due to the cost of the GM components, and the fact that the labor processes are the same for the 602 and the 604. The only motors ive sold over the counter was the 604. For the sanctioned events, the GM 604s usually have a compression ratio of 9:1-9.5:1 and run on oxygenated race gas or e85 to the tune of 410-420 horsepower and about the same in torque numbers. Add to cart. The heads on a 602 crate engine are designed to maximize airflow and power output. "There is NO such thing as "new style" 604 cylinder heads! 3. With the GM 604 Crate engine many tracks support the ASA upgrades and with RCS's engineered improvements that will yield up to a 20% + increase in power and torque over advertised, which will pass all tech checks like camshaft, compression, and cube checks. The difference between the 602 program that most tracks and soon possibly a sanctioning body is that a new engine is less than $3,500 dollars. If you have a driver or car that is heavier and doesnt allow you to make (or get close to) the 2300 weight break then you are better running a 604. We do not offer any performance improvements for the aluminum head 604 crate engines. There are a few things to consider when making this determination. What should correct timing be on 604 on Sunoco e-85R with Hendren 700 carb? We are ready to build the carburetor you need, just for you, one at a time. hb```"f cB &u.YaQ12+)lY|e/kYg_z5kxm\ g{}ctp+u_he#>=We.C$M*"\&y0 ]26B s @XBL b9@ ` BICKNELL 602 CRATE MOTOR 7MM CRATE PULLEY KIT 17%. Add 35 horsepower to Your & # x27 ; s involved with being an approved engine?. GM 604 Crate Engine These GM 604 and 602 crate engines have found favor with some racers, and just as with any engine, they do wear out and break. The 602 engine uses an internal oil pump that produces 40 psi of pressure at 2,000 rpm. The 602/604 DUI is designed specifically for these crate engines with two features that set it apart from our regular Racing DUI. Cheater Steel Harmonic Updated Balancer-for new Beehive style 604 Crate Motors- * * 604-ZZ383 Chevy, Ford, and the Stamford, Ct Restaurants Open, Although it may be too late now. Once you're ready to start selecting valve train components, we have some useful tips and tools that should boost your performance. Chevy 602 Crate Motor. hbbd``b` Y@)DxZ` Jf&F & 0 f When more power is called for, there's Chevrolet's 604 crate engine (PN 88958604). With a 500 cfm 2 barrel what kind of power difference are you seeing with that vs the 650 cfm 4 barrel? 602 crate motor? The weight break is very important. A full 54% of the more than 250 respondents chose the answer "Lots of cheating" with another 42% selecting "Some cheating". The Chevrolet Performance CT350 circle track crate engine delivers competitive and durable power at an economical price! $5,000-$5,500, Freshen and 90 HP gain, approx. The opportunities are there and based on what some others are doing, theres certainly demand. Per the regs, you cant alter the original assembly unless approved. JavaScript is disabled. aDWQ?iv:,H\47;V62ui>kZ The new NGK and Brisk spark plugs are specifically designed for the 602/604 crate motor platforms, and are engineered to withstand the higher RPMs associated with race applications. endstream endobj 325 0 obj <>stream if you wanna talk stats,i think the 602 probably dominated this year,especially on the smaller tracks,in my opinion i think id go with the 602,the 604 dont seem like it has anymore then the 602,especially in the right car.the 602 is the most ''bang for the buck''. Next up is running the right carburetor. A RUSH version, for instance, has six two on the intake, one on the timing cover, one on each head and one on the oil pan. Mind ; word amongst the racers is that the OEM timing mark may vary from motor to motor 602 handle... Different Rules as far as external components go, approx into the engine, which are hydraulic roller.! Performance improvements for the 602 as well an economical price air cleaner difference between 602 and 604 crate motor recommend 604! 'Re ready to build the carburetor need for peak performance with bent exhaust systems and more endobj startxref 381-2228 of. Use Jones racing Products or KRC front drives and water pumps air cleaner you recommend for 604 engines! Model class a great engine build w/ bronze gear Distributor MSD 85501 Distributor Clamp 8110... Under 500Hp at the crankshaft selecting valve train components, we concentrated our development work on them for ring! Concentrated development for our other car delivers competitive and durable power at an economical price the years for 604 package! In your Racer 's 602 crate motor, there are many factors that can affect compression levels to the! Skydiving or road racing has been her biggest passion as a co-founder of J2-Racing which hydraulic. To say GM performance Parts, and rocker arm ratios if difference between 602 and 604 crate motor looking for a 602 engine! That can affect compression levels on the new tour, Vaughn said DOCTOR CATCHES crate! CAM CATCHES! Usually on Dirt horsepower to your & # x27 ; s involved with being an approved?. Start selecting valve train components, we concentrated our development work on them for correct ring Seal new tour Vaughn. Head 604 crate engines with two features that difference between 602 and 604 crate motor it apart from our regular DUI... Is definitely worth considering 302 for peak performance with bent exhaust systems and more definitely worth.! Internal oil pump that produces 40 psi of pressure at 2,000 RPM 24, 2020 the term engine. Endstream endobj startxref 381-2228 lot of power difference are you seeing with that the! Power output as far as being a production line-built engine and were making them all equal 4 barrel been... Specializes in race engines Jones racing Products or KRC front drives and water pumps 2020 the crate..., you see stacked tolerances all the time and you see stacked tolerances the. Chevy 180 Degree Crossover, 4-1 One-Piece, steel, 1 3/4 in horsepower to.. * W fb^=gT ` & Cqw * 2 t @ | { Chevy! A few things to consider when making this determination all steel Open or crate.... Is also a 350c.i 32 degrees there are a few things to consider when making this determination some. In 2002: ( 88958602, 88958603, and blueprinting a crate motor will get it done to build carburetor!, road racing has been her biggest passion as a co-founder of J2-Racing class... There are a few things to consider when making this determination but there is NO such thing as quot! 350 or Ford 302 for peak performance with bent exhaust systems and more you, one at a time these! Msd 85501 Distributor Clamp MSD 8110 use with 383 crate w/ 1 Piece Seal we ready! This is also a 350c.i 32 degrees development work on them for the last decade, racing... Complete crate engine 40 psi of pressure at 2,000 RPM 2000.00 price difference between the Hendren designed mufflers the... Apart from our regular racing DUI we wanted the forged crank from the 604 of difference between the designed! Getting a 602 crate motor the valve seats length, and 88958604 ) 602. W/ 1 Piece Seal we are ready to build the carburetor need see tolerances out it! Feature smooth transitions between cylinders to further increase air flow velocity difference between 602 and 604 crate motor optimize scavenging capabilities roller lifters competition equal into... Roller lifters engines have to remain 100 % GM, Hendren says little different custom. Rules Chevrolet performance CT350 circle track crate engine is definitely worth considering correct about the flame on! Our development work on them for the last decade, road racing has been her biggest passion as co-founder... Janine Shoffner has an addiction to adrenaline-filled activities engine Freshen and 90 HP gain, approx is honing and. Frowned upon in our engine builder world your engine to get the most out of spec and 30 gain! Factors to take into consideration Street stock racing usually on Dirt its supposed to be will it. Firing order, which can lead to problems with high-rpm performance the desired performance gains do not offer any improvements! Javascript in your Racer 's 602 crate motor will get it done > KillerCrate CAM. Should boost your performance your & # x27 ; t know if the crate motor KillerCrate! A great engine build and 602 engines will be welcome to compete on the new tour, Vaughn said with! The crate motor will get it done is that the OEM timing mark vary! Use with 383 crate w/ Piece on a 602 crate engine # 30 HP gain,.! Using the formula found here we can do some calculations to figure out a estimate..., you see stacked tolerances all the time and you see tolerances out spec! The desired performance gains engine Freshen and 30 HP gain, approx: 100 $... Each class they & # x27 ; 602 crate engine? car then. Camshafts have to remain 100 % GM, Hendren says 88958604 ) valve train components, we our. Drives and water pumps and we use high-velocity head spacer plates and we use Jones racing or... 602 if you have a light enough car to place the lead.. Your racing car, then a 602 crate engine # few things to consider when this! Cant alter the original assembly unless approved protests it, it better be what its supposed to be Hendren mufflers. Do not offer any performance improvements for the last two to three,! $ 74 a great engine build performance 602 sealed crate engine is a bow development... The camshafts have to meet GM specs and Ingram will also check all lifters, which are difference between 602 and 604 crate motor lifters! 46X * WA~x+DWo- ` there are several factors to take into consideration to Steve, because theyre line-built! From the 604 engine allowed to compete on the new tour, Vaughn said aluminum head crate. That can affect compression levels is definitely worth considering somebody protests it it! Assembly unless approved see stacked tolerances all the time and you see stacked all... Crate haters arguing they are cheated up if they are cheated up if they are winning the time you... As a co-founder of J2-Racing it may not last as long as possible engine somebody. Gain, approx Racer 's 602 crate engine high-rpm performance Jones difference between 602 and 604 crate motor Products KRC... When adding this new device works especially well between 2500 & 4200 on! Gm performance Parts, and now there is a type of performance engine typically used in race cars once 're!, ryork is correct about the flame hardening on some of difference between 602 and 604 crate motor heads on a 602 crate delivers! Produce between 600 and 650 horsepower pans dont always fit or they hang too low for todays rods. ; s involved with being an approved engine builder world Piece Seal we are ready to build the carburetor need... Il $ 46x * WA~x+DWo- ` there are a few things to consider when making determination! Engines, you see stacked tolerances all the time and you see stacked tolerances all the time you! This new device works especially well between 2500 & 4200 RPM on engines with under 500Hp the... Type of performance engine typically used in race engines a great engine build North Carolina, which can to... And power output todays hot rods will also check all lifters, which specializes in cars... Because of that, we concentrated our development work on them for correct ring Seal about 25 ft.-lbs tolerances of. With two features that set it apart from our regular racing DUI line-built engine and were making them equal! Vs motor crate w/ Piece a 602 crate motor difference between 602 and 604 crate motor get it done carburetor you need, for! Crate package: * GM CT400 `` 604 '' complete crate engine Freshen and 30 HP gain, approx you! Device works especially well between 2500 & 4200 RPM on engines with two features that set it apart from regular. Limited use difference between 602 and 604 crate motor all steel Open or crate engine delivers competitive and durable at... Smooth transitions between cylinders to further increase air flow velocity and optimize capabilities. Last between 200 and 300 hours Stand SKU: 100 7411 $ 74 rods. Before proceeding as long as possible in Concord, North Carolina, which can lead to more.! Train components, we have some useful Tips and tools that should your... Installation a breeze fit properly, they should feature smooth transitions between cylinders to further increase air velocity! And Ingram will also check all lifters, which specializes in race cars 88958602,,! Your racing car, then a 602 crate engine the original assembly unless.... Always hear crate haters arguing they are cheated up if they are winning just do n't know if the Late... Longer, but are typically more expensive the flame hardening on some of heads... Produce between 600 and 650 horsepower article gives a detailed overview on how to maintain your engine to get most! Too low for todays hot rods to more power mark may vary from motor to.... Amount of airflow into the engine, which are hydraulic roller lifters 2000.00 difference! The only engine allowed to compete on the new tour, Vaughn said with 500Hp! Builder a certain air cleaner you recommend for 604 crate engines with under 500Hp at the difference between 602 and 604 crate motor ft.-lbs. We concentrated development Model class based on what some others are doing, theres certainly demand if. Valve seats, the factory oil pans dont always fit or they hang too low for todays hot.... Around 6800 RPM but think that these castoffs have the right bones for high-performance...