Guest JesperDJ Posted June 25, 2007 Share Posted June 25, 2007 How much power can you squeeze out of the 2JZGE when NA tuning for a reasonable amount? (cams, exhaust, engine control, stuff like that) 300hp? Quote Link to comment Share on other sites More sharing options...
wallace9 Posted June 25, 2007 Share Posted June 25, 2007 Dont know yet but its something I'll be looking into. Can't decide whether to go for the single install or squeeze as much power out of my NA as possible. I'm going to speak to an engineering firm where I live that prepare race engines to see what they think. Quote Link to comment Share on other sites More sharing options...
Guest JesperDJ Posted June 25, 2007 Share Posted June 25, 2007 cool.. it s just that with turbo i get punished on track (in form of more weight and another class) Quote Link to comment Share on other sites More sharing options...
SupraPL Posted June 25, 2007 Share Posted June 25, 2007 How much power can you squeeze out of the 2JZGE when NA tuning for a reasonable amount? (cams, exhaust, engine control, stuff like that) 300hp? 250-270fwhp? The whole of this work isn't worth a damn IMO. Quote Link to comment Share on other sites More sharing options...
JustGav Posted June 25, 2007 Share Posted June 25, 2007 This is an interesting one... I plan on seeing how much I can get out of my GE.... Little bits and pieces over the next few months... It is going for a dyno run to get a baseline ready for the extras. Currently it has a cam and a slightly remapped ECU... Quote Link to comment Share on other sites More sharing options...
bolarbag Posted June 25, 2007 Share Posted June 25, 2007 Currently it has a cam and a slightly remapped ECU... Single Cam conversion...interesting:p Quote Link to comment Share on other sites More sharing options...
wallace9 Posted June 25, 2007 Share Posted June 25, 2007 lol.... Quote Link to comment Share on other sites More sharing options...
SatSport Posted June 25, 2007 Share Posted June 25, 2007 How much power can you squeeze out of the 2JZGE when NA tuning for a reasonable amount? (cams, exhaust, engine control, stuff like that) 300hp? `reasonable amount` lol! Dave_H on here was also in the 9`s in his NA taken from NA section supraforums.. Top 20 Na-t Dyno -------------------------------------------------------------------------------- most of the sections have a list of the top dyno pulls, If you na-t members can list your rwhp we can assemble a list of the top 20 na-t dyno... NAME, RWHP, RWTQ, PSI 1) Ebanks: 981, 640, (?), 34 psi 2) Twincharge 758, ???, 34 psi 3) cody whitehead: 720, ???, ??? psi 4) SSSupra: 686, 559, 27 psi 5) 337: 660, 630, 30 psi 6) pm supra: 660, 540, 34 psi Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted June 25, 2007 Share Posted June 25, 2007 SatSport, the guy doesnt want a turbo Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 25, 2007 Share Posted June 25, 2007 300 BHP should be fairly easy, but very expensive. 375 should be difficult, and mega expensive, 400 should be achievable, but ludicrously expensive. Quote Link to comment Share on other sites More sharing options...
wallace9 Posted June 25, 2007 Share Posted June 25, 2007 300 BHP should be fairly easy, but very expensive. 375 should be difficult, and mega expensive, 400 should be achievable, but ludicrously expensive. When you say for example 400 should be achievable, but ludicrously expensive, would it in your opinion cost more than the 10K you'd fork out for an NA-T conversion?? If I could get anywhere near 300 I would be pleasantly surprised .....Well depend what my bank acount looked liked afterwards. Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 25, 2007 Share Posted June 25, 2007 From scaling off the published powercurve, max BMEP for the NA is 12 bar @ about 5000rpm. If you changed your entire intake and exhaust system to move this to 6400 then you could get about 250 / 260 hp. That would mean intake and exhaust manifold and intake and exhaust cams. …and I don't mean bolt-on "off the shelf" jobbies. I mean bespoke items specifically made for that one purpose. How you would get to the correct spec without doing somw kind of development exercise, I have no idea. If you wanted to get to 300hp, then you would first need to make the engine safe to rev to 7500, and then do the intake / exhaust / cams optimisation. I did a more detailled writeup of this ages ago. See post 28 in this thread. I was being very optimsitic with the BMEP figures that day... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 25, 2007 Share Posted June 25, 2007 10 K wouldn't scratch the surface, 400 BHP would be upwards of 50k with development time and parts factored in. Given the long stroke it may not even be possible, you'd need to turn it at over 9000 RPM, in all likelyhood. A state of the art 2 litre currently gives about 350 BHP. Obviously given aerospace type budgets, even a 2.4 can give a LOT of HP (but not much torque), as current F1 engines show. Quote Link to comment Share on other sites More sharing options...
JustGav Posted June 25, 2007 Share Posted June 25, 2007 Single Cam conversion...interesting:p As in intake cam.... not both.... Nobody likes a smart...... pffffftttttttt *grin* Quote Link to comment Share on other sites More sharing options...
Guest JesperDJ Posted June 26, 2007 Share Posted June 26, 2007 Well i know that im gonna get alot more power with turbo conversion (and actually i have EU/US big turbos lying around somewhere..), but thats not the point.. 200FWHP is "easily" acheeved on a 2.0liter enginge, so 300 should not be a problem with the 3l 2JZGE eng. The reason for the NA tuning is that if i clamp on the turbocharges im just gonna get punished with more weight and unable to race in the 2499-2999ccm class.. im beeing pushed to the 3999-4999ccm class Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 26, 2007 Share Posted June 26, 2007 Well i know that im gonna get alot more power with turbo conversion (and actually i have EU/US big turbos lying around somewhere..), but thats not the point.. 200FWHP is "easily" acheeved on a 2.0liter enginge, so 300 should not be a problem with the 3l 2JZGE eng. The reason for the NA tuning is that if i clamp on the turbocharges im just gonna get punished with more weight and unable to race in the 2499-2999ccm class.. im beeing pushed to the 3999-4999ccm class Yes, 100bhp per litre on an NA can be easily achieved - provided you have the budget to go and find out the precise cam / intake / exhaust system combination that will give you the peak BMEP at the correct revs to do so. Then if you need to rev it a bit harder you'[ll have to make the engine safe to whatever speed you find is necessary to make up the extra. There is some evidence (based on what we know of the VVTi) that the actual safe rev limit for the top end is 7200, but that is with stock springs and cam profiles. You'll be changing those anyway. In the NA Supra's case there is unlikely to be anything off the shelf that will get you 100bhp/litre out of the box. Hence the high price tag. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 26, 2007 Share Posted June 26, 2007 One extra thing to ponder is what a bitch it will be to drive as a 3litre 400bhp heavy car. It will have to be over 5000rpm all the time in order to shift decently. Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 26, 2007 Share Posted June 26, 2007 I think he wants to race it, so drivability may not be an issue. It certainly won't have much low down torque, though. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 26, 2007 Share Posted June 26, 2007 When you exit a corner it is an issue, midrange torque will pull you out quicker. On a heavy car lack of torque down south might make it uncompetitive. Fitted on a 500Kg car this engine might be a rocket, but on a 1500kg car it might hinder things. Just a thought:innocent: Quote Link to comment Share on other sites More sharing options...
wallace9 Posted June 26, 2007 Share Posted June 26, 2007 I know JesperDJ wants to keep his NA engine but thought I would ask this since there's a few folk here who seem to know what they're talking about. Would it be possible to bolt on an IS300 charger?? Are the engines not pretty similar? Quote Link to comment Share on other sites More sharing options...
JustGav Posted June 26, 2007 Share Posted June 26, 2007 Have a word with Dangerous Brain, I know he looked at this option, but I believe the dizzy is the main issue... Quote Link to comment Share on other sites More sharing options...
jim_supra Posted June 26, 2007 Share Posted June 26, 2007 Yes the distributor is the biggest issue with a supercharger. It could be gotten around by fitting all the vvti gubbins from the late spec NA engine. But that would be more money. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 26, 2007 Share Posted June 26, 2007 Removing the disi would be trivial and a first step when fitting the necessary engine management system to map the thing in its new configurations. Quote Link to comment Share on other sites More sharing options...
Nic Posted June 26, 2007 Share Posted June 26, 2007 I know JesperDJ wants to keep his NA engine but thought I would ask this since there's a few folk here who seem to know what they're talking about. Would it be possible to bolt on an IS300 charger?? Are the engines not pretty similar? The IS300 uses the VVTi version of the 2JZGE, there are bolt on kits available in the US for the IS300 which could probably be made to fit an NA Supra. As said the distributor is in the way on the non-VVTi engine, there may also be issues with it being designed for a LHD car. Details/pics of one of the kits here: http://www.lextasy.com/LMS_IS300_supercharger.htm Quote Link to comment Share on other sites More sharing options...
mattanna Posted June 26, 2007 Share Posted June 26, 2007 do what Thor did and fit a lexus v8 in it, n/a and gives about 270 hp, not horifically expensive iirc, and can have a supercharged fitted more easily, they do the conversion i believe but you must supply engine, which is 1jzge or something like that Quote Link to comment Share on other sites More sharing options...
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