Kirk Posted February 4, 2010 Share Posted February 4, 2010 jamie your a god send to this forum. always asking and pushing the limits of the supra. can i ask what exactly your looking for is it a dyno graph to read 1000bhp or are you looking to get the max power out of the turbo by raising the limiter to 8000rpm. your driving the car on a daily basis and if you feel it can handle more rpm go for it. there are people out there you say that 8k /8.5kand over 900bhp the standard engine can cope. Quote Link to comment Share on other sites More sharing options...
sdistc Posted February 4, 2010 Share Posted February 4, 2010 Is your pump fuel in Austrailia the same as ours? do you know what your afr's and timing is mate? Well, I'm not 100000% sure that the fuels are identical - but I run mine on BP Ultimate (98 octane) without octane booster or meth. I would hope there is a parity between our countries for fuel quality, but I do know that our diesel has much higher sulfur content (or did until recent advances in diesel technology and subsequent influx of European diesel passenger cars) - so it may not be the same. Can't be sure about timing and AFRs on mine - except that it was a very conservative tune (I seem to recall something like mid teens timing, and high 11/low 12 AFRs on WOT... but I'm probably way off). I am doing a little bit more to the car and will get a retune this year sometime - so I will get some more logs and let you know. Of course, by that stage you'll probably have sorted yourself out Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 jamie your a god send to this forum. always asking and pushing the limits of the supra. can i ask what exactly your looking for is it a dyno graph to read 1000bhp or are you looking to get the max power out of the turbo by raising the limiter to 8000rpm. your driving the car on a daily basis and if you feel it can handle more rpm go for it. there are people out there you say that 8k /8.5kand over 900bhp the standard engine can cope. Im looking for the fastest Supra on pump fuel, that means the biggest powerband and most bhp i can get out of pump fuel, no point in just slapping on a big turbo and not being able to max it out due to running out of fuel. Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 4, 2010 Share Posted February 4, 2010 IMO id say the most you could get is around 800-850 on pump fuel at the most before you need something to boost the octane. Id actualy say a 74mm could achieve this and still have decent spool to go with it but thats just my opinion Quote Link to comment Share on other sites More sharing options...
nigelboyne Posted February 4, 2010 Share Posted February 4, 2010 There are people out there that say the moon is made of cheese, but you are probably best off not believing them mkiv.com lots of great info. there are standard supra engines out there running 900hp and 8k limiters. Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 Well, I'm not 100000% sure that the fuels are identical - but I run mine on BP Ultimate (98 octane) without octane booster or meth. I would hope there is a parity between our countries for fuel quality, but I do know that our diesel has much higher sulfur content (or did until recent advances in diesel technology and subsequent influx of European diesel passenger cars) - so it may not be the same. Can't be sure about timing and AFRs on mine - except that it was a very conservative tune (I seem to recall something like mid teens timing, and high 11/low 12 AFRs on WOT... but I'm probably way off). I am doing a little bit more to the car and will get a retune this year sometime - so I will get some more logs and let you know. Of course, by that stage you'll probably have sorted yourself out Sounds like good power, the GT4294 is 71mm also aint it? Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 IMO id say the most you could get is around 800-850 on pump fuel at the most before you need something to boost the octane. Id actualy say a 74mm could achieve this and still have decent spool to go with it but thats just my opinion I personally think a Precision billet 71 with .81 ar would be the perfect turbo and im pretty sure its what im going with so time will tell, i dont think pump fuel could max a 74:) Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 4, 2010 Share Posted February 4, 2010 I personally think a Precision billet 71 with .81 ar would be the perfect turbo and im pretty sure its what im going with so time will tell, i dont think pump fuel could max a 74:) Good point and nice choice of turbo Should be interesting Quote Link to comment Share on other sites More sharing options...
sdistc Posted February 4, 2010 Share Posted February 4, 2010 Sounds like good power, the GT4294 is 71mm also aint it? Yep. And as for bigger turbos, I think it's false economy to go bigger - you can't run the decent timing to make the power, meaning you have to run more boost on less timing.. so it becomes an exercise in futility. I would say that even a 71 mm is probably too big to run efficiently at high boost. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 4, 2010 Share Posted February 4, 2010 mkiv.com lots of great info. there are standard supra engines out there running 900hp and 8k limiters. Im well aware of mkiv.com thanks. Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 Yep. And as for bigger turbos, I think it's false economy to go bigger - you can't run the decent timing to make the power, meaning you have to run more boost on less timing.. so it becomes an exercise in futility. I would say that even a 71 mm is probably too big to run efficiently at high boost. You could be right, maybe i have already got the setup i want, im running 27degree timing and 1.9bar now. Maybe with my built engine and more revs i will max out road fuel and my turbo:search: Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 4, 2010 Share Posted February 4, 2010 How much more has the 67 got to give though? i would of thought it be reaching its limits at 730 Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted February 4, 2010 Share Posted February 4, 2010 And when im on the boil my rev counter only stays in the very top bit of the rev range where all the power is no matter what turbo i was to have. Thoughts? Been saying this for years, and its not just because of HP numbers which have always been disputed over here. I still think that they had more Supras running in the 9 sec range more than 10 years ago than we do now. Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 How much more has the 67 got to give though? i would of thought it be reaching its limits at 730 Who knows? so hard to compare to anything on supraforum and im not aware of anyone pushing a 67 so hard with figures to back it up over here. Quote Link to comment Share on other sites More sharing options...
Chingy Posted February 4, 2010 Share Posted February 4, 2010 I used to think the less lag the better, but mine is so violent at low revs when it comes onto boost, that after a few years of constant wheel spinning, I'm now thinking a bit of lag and more power is definately the way forward, as once ur in the right gear lag isn't a issue. But I'm sure it also works vise versa for those who currently have alot of lag. In an ideal 'carlsberg' world you would have one of each. Thats why me and lee are always borrowing each others cars for the day :d Quote Link to comment Share on other sites More sharing options...
sdistc Posted February 4, 2010 Share Posted February 4, 2010 How much more has the 67 got to give though? i would of thought it be reaching its limits at 730 You could be right, maybe i have already got the setup i want, im running 27degree timing and 1.9bar now. Maybe with my built engine and more revs i will max out road fuel and my turbo:search: M_life is probably close on the money there - for a stock engine, though. Increasing the breathing with a built head and cams will always make more power at lower boost, and combined with the decent tuning you have, you'll probably get a significant amount more out of your current turbo. Quote Link to comment Share on other sites More sharing options...
sdistc Posted February 4, 2010 Share Posted February 4, 2010 Who knows? so hard to compare to anything on supraforum and im not aware of anyone pushing a 67 so hard with figures to back it up over here. There are a couple of e85 billet 67s now, making big numbers. Which I think shows the capability of your turbo to flow the hp, but whether it will cope with the road fuel to get you there is the big "if". I'm very interested to see how you go Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted February 4, 2010 Share Posted February 4, 2010 If I ever change my turbo Jamie I recon I would go with the billet 71 too When my cams are in and Ryan maps it next week we will be upping the rev limit from the current 7200. This will be dependent on how the cams shift the power about. Saying that mine is not a stock engine and should be good for 8k revs so time will tell. Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 If I ever change my turbo Jamie I recon I would go with the billet 71 too When my cams are in and Ryan maps it next week we will be upping the rev limit from the current 7200. This will be dependent on how the cams shift the power about. Saying that mine is not a stock engine and should be good for 8k revs so time will tell. Sounds good, what sort of boost are you going for mate? Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted February 4, 2010 Share Posted February 4, 2010 Sounds good, what sort of boost are you going for mate? Im going to get Ryan to map it as is at 1.5 bar 7200 rpm so I can see a back to back test with just the cams. Will then be taking the revs up and the boost to 1.7 bar. I cant wait for next thursday to come along Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 4, 2010 Share Posted February 4, 2010 2 BAR Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted February 4, 2010 Share Posted February 4, 2010 2 BAR Fueling will not support anywhere near that And the chocolate fireguard that is the precision housing will prob melt LOL Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 4, 2010 Author Share Posted February 4, 2010 Im going to get Ryan to map it as is at 1.5 bar 7200 rpm so I can see a back to back test with just the cams. Will then be taking the revs up and the boost to 1.7 bar. I cant wait for next thursday to come along Sounds good, look forward to the results, i think the extra revs will be a huge bonus, im forever on the 7200 rev limit. Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 4, 2010 Share Posted February 4, 2010 Fueling will not support anywhere near that And the chocolate fireguard that is the precision housing will prob melt LOL Then up the fuel ... seriously thats all that yours is missing now. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted February 4, 2010 Share Posted February 4, 2010 Sounds good, look forward to the results, i think the extra revs will be a huge bonus, im forever on the 7200 rev limit. im just not at the minute as due to the stock jspec cams its out of puff at 7k so theres no point. Hoping for alot more top end with the cams fitted. Quote Link to comment Share on other sites More sharing options...
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