NotSuperBbutZ Posted April 9, 2006 Share Posted April 9, 2006 I'm currently in the process of putting an 2000 s15 sr20det engine and 6 speed in my Z, it's gonna be my commuter when im done. Can anyone tell me what fuel you run in your sr240's??? i'm getting a gt2871r and doing a few other things too but nothing over 250whp, is it ok to run just 93 outta the pump??? Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted April 9, 2006 Share Posted April 9, 2006 I'm currently in the process of putting an 2000 s15 sr20det engine and 6 speed in my Z, it's gonna be my commuter when im done. Can anyone tell me what fuel you run in your sr240's??? i'm getting a gt2871r and doing a few other things too but nothing over 250whp, is it ok to run just 93 outta the pump??? I am no expert, but I do have a running car that I have been driving and I have done a lot of research. Why are you getting a GT2871R if you aren't going over 250 whp? Is that even possible? Are you planning on running 6 psi? My GT2871R is internally wastegated at 14 psi. If you run a GT2871R, you are going to have to get 550 cc injectors. I would recommend 740's because the GT2871R flows enough air that the 550's will be running at 100% duty cycle. You will also have to have a bigger AFM and a reflash of your computer. I think these are minimums if you go to the GT2871R. I think you are going to have over 300 whp whether you want to or not, unless you just run it out of tune. That is also going to create an issue with that tranny that you are using. All of my research, suggests that the six speed has reliability issues at higher hp. It seems that the 6 speed tranny is the 5 speed tranny with thinner gears to fit an extra one. I think most of the drift guys switch from 6 speed to 5 speeds to keep from breaking the thinner gears. As for gas, I run 93 octane pump gas. I have had 0 knock at the stock setup. I still have 0 knock with the GT2871R setup but I am running way rich and need to retune. I anticipate being able to lean the tune and still run 93 octane with my FMIC at 14-17 psi. Quote Link to comment Share on other sites More sharing options...
SR240Z Posted April 10, 2006 Share Posted April 10, 2006 we were making 360whp on 91 octane with a garrett gt25r and 550cc injectors, you shold definitely be on the safe side, and if your only going for 250whp, dont even bother with the 2871r, keep the stock s15 t28, you will have better response Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted April 10, 2006 Share Posted April 10, 2006 That's kinda what I was thinking. If he wants to stay down to 250whp, he could just turn up the boost, get the appropriate exhaust and get a fmic. He can probably get close without making the major mods that the GT2871R is going to require. Quote Link to comment Share on other sites More sharing options...
SR240Z Posted April 10, 2006 Share Posted April 10, 2006 he will get 250whp no problem at all, 250whp is attainable from a stock s13 redtop with fmic and full exhaust and 15psi on stock t25 Quote Link to comment Share on other sites More sharing options...
NotSuperBbutZ Posted April 10, 2006 Author Share Posted April 10, 2006 i dont mind a few extra ponies, whats wrong with that? I just wasnt aware of how high an outout that turbo has, but its cool. I see alot of stuff on here about the diffs between hte gt2871r and the gt25r, what are yur guys opinions on either? and what kind of mileage do you guys get with a tuned up sr20det making say 360-400 ponies??? Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted April 11, 2006 Share Posted April 11, 2006 I am still not done tuning, but I expect 25 mpg on my daily commute. However, I am sure that if I put my foot in it, I will lose mileage. If you get the GT2871R, remember that it is going to cost between $2,000 and $3,000 for the required upgrades. You will have to have: GT2871R $1075 Fuel Injectors $ 489 * Upgrade ECU $600 to $1500 * Z32 MAF $150 The $489 is what I paid for Nismo 740's. You can go cheaper if you want The ECU upgrade is $550 plus shipping for a flash from Enthalpy or more for a standalone. I have $1100 in my APEXi Power FC with commander and datalogit. All of these upgrades are required if you switch to a GT2871R. Quote Link to comment Share on other sites More sharing options...
NotSuperBbutZ Posted April 11, 2006 Author Share Posted April 11, 2006 i have a 22k budget and 3 years to finish it, so everything will be done right. If i make these enhancments will i have to spend more money on internals to make it handle the power, or can the sr20det handle that power on its stock guts??? Quote Link to comment Share on other sites More sharing options...
Lewis Maudlin Posted April 11, 2006 Share Posted April 11, 2006 My understanding is that the SR20DET can handle 350whp on stock guts. However, some guys have blown head gaskets. Your budget looks realistic. It sounds like you have enough money to complete your car. Good luck with the build. Quote Link to comment Share on other sites More sharing options...
NotSuperBbutZ Posted April 11, 2006 Author Share Posted April 11, 2006 is there a place that sells metal head gaskets??? Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted April 11, 2006 Share Posted April 11, 2006 yes. Quote Link to comment Share on other sites More sharing options...
SR240Z Posted April 11, 2006 Share Posted April 11, 2006 yea i can get you metal headgaskets for the sr20, let me know which brand and what thickness you want and ill shoot you over a price with shipping Quote Link to comment Share on other sites More sharing options...
NotSuperBbutZ Posted April 12, 2006 Author Share Posted April 12, 2006 well what do you think, you obviously have more experience in this area than i do lol, do the different brands have differing qualities? what difference does the thickness make? Quote Link to comment Share on other sites More sharing options...
SR240Z Posted April 12, 2006 Share Posted April 12, 2006 the thickness can either raise or drop your compression depending on if you deck the top of the block or not, but if you dont id say go with a cometic 1.1mm metal headgasket Quote Link to comment Share on other sites More sharing options...
AK-Z Posted April 29, 2006 Share Posted April 29, 2006 I know this is a old thread, But I suggest on swapping the 6 speed for a 5 speed. Reason is, is that the speedo sender is not on the tranny, its on the diff on the S15 . So either keep the tranny and swap the diff as well, or get a 5 speed, I believe the KA tranny and SR trannies are the same as far as bell housing and mounting goes. Quote Link to comment Share on other sites More sharing options...
Hugh Posted April 29, 2006 Share Posted April 29, 2006 The S15's 480cc injectors should go a long way further than the S13/S14's 370cc. I've seen some pretty powerful S15's on pretty stock setups. 300hp is easily attainable with the stock turbo. Is there a reason why you're already planning to upgrade the turbo? (if you don't want a buttload of power) Quote Link to comment Share on other sites More sharing options...
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