Hi everyone. I've read these forums for a good while, as I'm on my second 240SX now, decided it was time to post the questions I have.
I searched but was not able to come up with exactly what I needed to know.
We purchased a 1990 240SX to make into a track/race car.
We're planning a SR20DET swap...
Questions:
1) Do any variants of the SR20DET have under-piston oil-squirters?2) What is the most cost-effective means to go to a larger-body turbo? (Such as a GT30XX series)3) What maximum RPM's are folks hitting with race cams/solid lifters and headwork (along with forged pistons and rods)?4) Is anything known about the strength of the stock Crank?5) Are the after-market intake manifolds of any real benefit?6) Are there any 'new production' after-market MAF/Throttlebody upgrades for the SR20DET?
Keep in mind this will be in a E-Modified (practically open-class) autocross/track car and target RWHP is in the 400 range.
I have many more questions but many of those relate to the chassis itself, so I will save those for the appropriate forum.
Thank you!
SR20DET Questions for Track-Car Build.
Re: SR20DET Questions for Track-Car Build. (shovelman)
ill chime in with some hints to your questions. as far as i know...
2) for a larger turbo, you might wanna go with a top mount exhaust manifold. one of the guys on this forum has a friend who makes awesome manifolds for a lot less than regular aftermarket ones.
3) Rpms i would ssay with a fully built race motor would be about 9K-10K RPMS??
4) stock crank is very strong, people get into the 400 hp with stock internals.
5) there are some aftermarket manifolds with more top end power, one made by greddy, and another one i cant remember from our sponsors. go to the main webpage at http://www.240sx.org, go to where it says shopping or whatever, and look through those sponsors. phase2 is pretty good
6) throttle bodies, i know there is one made by tomei, and thats in our sponsors web links. some people use a q45 throttle body and thats for really big power. a maf, most pople get a 300zx maf, called the n62, but above 400, i suggest the cobra maf.
hope some of that gets you in the right dirrection.
2) for a larger turbo, you might wanna go with a top mount exhaust manifold. one of the guys on this forum has a friend who makes awesome manifolds for a lot less than regular aftermarket ones.
3) Rpms i would ssay with a fully built race motor would be about 9K-10K RPMS??
4) stock crank is very strong, people get into the 400 hp with stock internals.
5) there are some aftermarket manifolds with more top end power, one made by greddy, and another one i cant remember from our sponsors. go to the main webpage at http://www.240sx.org, go to where it says shopping or whatever, and look through those sponsors. phase2 is pretty good
6) throttle bodies, i know there is one made by tomei, and thats in our sponsors web links. some people use a q45 throttle body and thats for really big power. a maf, most pople get a 300zx maf, called the n62, but above 400, i suggest the cobra maf.
hope some of that gets you in the right dirrection.
Re: SR20DET Questions for Track-Car Build. (ser2102)
Quote »ill chime in with some hints to your questions. as far as i know...
2) for a larger turbo, you might wanna go with a top mount exhaust manifold. one of the guys on this forum has a friend who makes awesome manifolds for a lot less than regular aftermarket ones. [/quote]\
Any idea who that is and what flanges they're made for?
Quote »3) Rpms i would ssay with a fully built race motor would be about 9K-10K RPMS??[/quote]When you say fully built, i would assume that you mean with a crank, rods, pistons, but I have not seen an after-market crank available... Am I missing something? Was planning having stock crank knife-edged and balanced...Quote »4) stock crank is very strong, people get into the 400 hp with stock internals. [/quote](See above)
Quote »5) there are some aftermarket manifolds with more top end power, one made by greddy, and another one i cant remember from our sponsors. go to the main webpage at http://www.240sx.org, go to where it says shopping or whatever, and look through those sponsors. phase2 is pretty good[/quote]yeah, greddy and hks both make one, I was just inquiring as to whether or not they actually DO anything for the engine, as most turbo cars are not necessarily in need of a better intake manifold
Quote »6) throttle bodies, i know there is one made by tomei, and thats in our sponsors web links. some people use a q45 throttle body and thats for really big power. a maf, most pople get a 300zx maf, called the n62, but above 400, i suggest the cobra maf. [/quote]Cobra MAF? Is that a brand? Is that off of a Ford SVT Cobra? What years?
2) for a larger turbo, you might wanna go with a top mount exhaust manifold. one of the guys on this forum has a friend who makes awesome manifolds for a lot less than regular aftermarket ones. [/quote]\
Any idea who that is and what flanges they're made for?
Quote »3) Rpms i would ssay with a fully built race motor would be about 9K-10K RPMS??[/quote]When you say fully built, i would assume that you mean with a crank, rods, pistons, but I have not seen an after-market crank available... Am I missing something? Was planning having stock crank knife-edged and balanced...Quote »4) stock crank is very strong, people get into the 400 hp with stock internals. [/quote](See above)
Quote »5) there are some aftermarket manifolds with more top end power, one made by greddy, and another one i cant remember from our sponsors. go to the main webpage at http://www.240sx.org, go to where it says shopping or whatever, and look through those sponsors. phase2 is pretty good[/quote]yeah, greddy and hks both make one, I was just inquiring as to whether or not they actually DO anything for the engine, as most turbo cars are not necessarily in need of a better intake manifold
Quote »6) throttle bodies, i know there is one made by tomei, and thats in our sponsors web links. some people use a q45 throttle body and thats for really big power. a maf, most pople get a 300zx maf, called the n62, but above 400, i suggest the cobra maf. [/quote]Cobra MAF? Is that a brand? Is that off of a Ford SVT Cobra? What years?
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Hijacker
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'94 F-150 - Location: Fredericksburg, VA
the 300ZX MAF is good for over 500 HP. the Cobra MAF will only support 350-ish unless you added a resister to its circuit, from what I was led to believe. And yes the Cobra MAF is the one you would find off of a Ford Mustang Cobra, and I would assume that any of the last gen Cobras would be good to snatch one from.
Personally speaking, I think the 300ZX MAF gives the least amount of hassle for what you get out of it.
The only after market cranks I have seen are for stroker kits. When the day comes, mine will just get a good balancing and polishing job done to it. Otherwise, the stock crank is pretty solid and I have yet to see one fail on an SR.
And for the first question the OP asked about; I'm 99% certain that all RWD configured SRs have piston oil squirters. Don't quote me on it, though.
Personally speaking, I think the 300ZX MAF gives the least amount of hassle for what you get out of it.
The only after market cranks I have seen are for stroker kits. When the day comes, mine will just get a good balancing and polishing job done to it. Otherwise, the stock crank is pretty solid and I have yet to see one fail on an SR.
And for the first question the OP asked about; I'm 99% certain that all RWD configured SRs have piston oil squirters. Don't quote me on it, though.
Re: (tenkawa_akito)
Okay, thank you for your reply.tenkawa_akito wrote:the 300ZX MAF is good for over 500 HP. the Cobra MAF will only support 350-ish unless you added a resister to its circuit, from what I was led to believe. And yes the Cobra MAF is the one you would find off of a Ford Mustang Cobra, and I would assume that any of the last gen Cobras would be good to snatch one from.
Personally speaking, I think the 300ZX MAF gives the least amount of hassle for what you get out of it.
The only after market cranks I have seen are for stroker kits. When the day comes, mine will just get a good balancing and polishing job done to it. Otherwise, the stock crank is pretty solid and I have yet to see one fail on an SR.
And for the first question the OP asked about; I'm 99% certain that all RWD configured SRs have piston oil squirters. Don't quote me on it, though.
Question then.
A SR20DET with the stock crank balanced, knife-edged, and polished, Eagle H-Beam rods, Weisco Forged Pistons, a good spring/retainer set, and Tomei 280 duration cams with solid lifters, should be good for 9-10K and 450RWHP, given that all fueling, intake/exhaust manifold, and turbo needs are met ?
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dark_munchkin
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Re: (shovelman)
Tomei makes full counter weighted cranks for the SR, I dont think its just for the 2.2L stroker.
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Slipstream
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Re: (dark_munchkin)
I believe Race Engineering also makes a billet crank separate from the stroker kit.
Re: (Slipstream)
I have been unable to find a vendor on the sponsor's list that sells the Tomei crank or Throttlebody.
Anyone have any hints?
Anyone have any hints?
Re: (shovelman)
What sort of racing are you looking at doing? Are you doing a full out NASA spec race car, or just something to beat the hell out of on the weekends?
If you're doing HPDE, copy my setup. You will absolutly love the response, and surprize most people out there...
If you're doing HPDE, copy my setup. You will absolutly love the response, and surprize most people out there...
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dark_munchkin
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- Joined: Tue Oct 19, 2004 9:10 am
Re: (shovelman)
You might be able to call up some of the vendors and they might be able to special order it for you. It'll cost a pretty penny for one tho.
Re: (codyace)
Its actually an Solo-II EM Class car, adhering to the SCCA rules for the car is making things a touch difficultcodyace wrote:What sort of racing are you looking at doing? Are you doing a full out NASA spec race car, or just something to beat the hell out of on the weekends?
If you're doing HPDE, copy my setup. You will absolutly love the response, and surprize most people out there...
So you folks are saying that I would have to special order the crank... and no one knows anything about them? hmm
I'll post later when I have more questions
Re: (shovelman)
Ok so allow me to summarize where we stand.
We want a usable and safe ~450RWHP and usable RPM band to atleast 9K RPM.
We do however want the option to crank up boost (for days at the strip, for instance) and put down in the neighborhood of 550-600RWHP. This goal is being accounted for in the build.
We will be doing a full build and head work.
My question is turbo/manifold options.
Someone said someone from the board makes top-mount manifolds?
Can a GT28XX series turbo manage 550-600RWHP ? I wouldn't think so, right?
About those throttlebodies, Tomei makes them you say? Who sells them?
Thanks!
We want a usable and safe ~450RWHP and usable RPM band to atleast 9K RPM.
We do however want the option to crank up boost (for days at the strip, for instance) and put down in the neighborhood of 550-600RWHP. This goal is being accounted for in the build.
We will be doing a full build and head work.
My question is turbo/manifold options.
Someone said someone from the board makes top-mount manifolds?
Can a GT28XX series turbo manage 550-600RWHP ? I wouldn't think so, right?
About those throttlebodies, Tomei makes them you say? Who sells them?
Thanks!
Re: (shovelman)
http://phase2motorsports.store....html
there are the intake manifolds and the tomei throttle body i was talking about. but also for big power, look into a Q45 TV. i know that thing is huge
there are the intake manifolds and the tomei throttle body i was talking about. but also for big power, look into a Q45 TV. i know that thing is huge
Re: (ser2102)
I went over that site and never saw the throttlebody.
anyone know stats on the Q45 TB? What is required to mount it?
If i'm going to have to fab bracketry to mount the Q45 part, I might as well get a REAL TB from one of the gabillion companies that make them for mustangs and vettes. :P
anyone know stats on the Q45 TB? What is required to mount it?
If i'm going to have to fab bracketry to mount the Q45 part, I might as well get a REAL TB from one of the gabillion companies that make them for mustangs and vettes. :P
Re: (shovelman)
Ok I found the Q45 TB's on Ebay.
My question now is, is this TB a bolt-on? Assuming the bolts line up, I can take the manifold to the machine shop and have them matched/polished to fit the airflow properly.
My question now is, is this TB a bolt-on? Assuming the bolts line up, I can take the manifold to the machine shop and have them matched/polished to fit the airflow properly.
Re: (shovelman)
im guessing its bolt on, if not, you might have to have an adapter plate made for it, which really shouldnt be too hard.