Pig Posted May 31, 2006 Share Posted May 31, 2006 Here it is. Quote Link to comment Share on other sites More sharing options...
Tom Posted May 31, 2006 Share Posted May 31, 2006 Why is the torque so low? Quote Link to comment Share on other sites More sharing options...
Pig Posted May 31, 2006 Author Share Posted May 31, 2006 The second line is boost. It shows that the boost is coming on very late! Quote Link to comment Share on other sites More sharing options...
Tom Posted May 31, 2006 Share Posted May 31, 2006 Ahhh, what's up with that then?,surely it shouldnt be that laggy at all? Quote Link to comment Share on other sites More sharing options...
Pig Posted May 31, 2006 Author Share Posted May 31, 2006 Not sure what the prob is at the moment. Not sure where to start really!s Quote Link to comment Share on other sites More sharing options...
Kopite Posted May 31, 2006 Share Posted May 31, 2006 What's your full set up Pig? Quote Link to comment Share on other sites More sharing options...
lockys96 Posted May 31, 2006 Share Posted May 31, 2006 why is everything always put into at the wheels? i know its how to measure the true bhp as opposed to the flywheel, but isnt the standard supra tt qouted at 320 fly? it gets confusing, is there a bhp converter anywhere Quote Link to comment Share on other sites More sharing options...
Kopite Posted May 31, 2006 Share Posted May 31, 2006 It's more useful as it's what's being measured unless you want to put it on an engine dyno. a Flwheel calculator wouldn't really work as the drivetrain losses will be slightly different car to car, each rolling road / hub dyno is already different as it is. Quote Link to comment Share on other sites More sharing options...
GeordieSteve Posted May 31, 2006 Share Posted May 31, 2006 why is everything always put into at the wheels? i know its how to measure the true bhp as opposed to the flywheel, but isnt the standard supra tt qouted at 320 fly? it gets confusing, is there a bhp converter anywhere Oh oh... here comes the can of worms Quote Link to comment Share on other sites More sharing options...
supragold Posted May 31, 2006 Share Posted May 31, 2006 Oh oh... here comes the can of worms Quote Link to comment Share on other sites More sharing options...
mr keef Posted May 31, 2006 Share Posted May 31, 2006 worms did you say:p Quote Link to comment Share on other sites More sharing options...
TRD3000GT Posted May 31, 2006 Share Posted May 31, 2006 what cams do you have installed? Are you sure the timing is right.. Ive seen massive torque loss after a belt skipped a tooth Quote Link to comment Share on other sites More sharing options...
Class One Posted May 31, 2006 Share Posted May 31, 2006 Lag? Surely you mean the time it takes to make positive boost. Its boosting late but that does not mean lag. Lag is the time measured when the turbo is in the boost zone, between you hitting the gas and the turbo delivering. Usually with modern turbos a fraction of a second. What your graph shows is that with your T61 you seem to be making boost higher up the rpm scale than where you'd expect it to be. Quote Link to comment Share on other sites More sharing options...
letmeshowyou Posted May 31, 2006 Share Posted May 31, 2006 much higher than you'd expect it to be - this isnt making full boost til approx 4600 rpm - as an example Burts car (also auto running a t61) is making full boost from 3400 from what he was saying... Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted May 31, 2006 Share Posted May 31, 2006 Look at Jakes RWHP for his blue one, you seem way off for a stage 1 (61 type turbo) even though yours is an auto. Quote Link to comment Share on other sites More sharing options...
imi Posted May 31, 2006 Share Posted May 31, 2006 how is positive boost created anyway, doesnt this have a direct relationship with the turbo spooling up..... Quote Link to comment Share on other sites More sharing options...
Miguel Posted May 31, 2006 Share Posted May 31, 2006 Oops edited as it has already been asked.....* I'm a Dope* Whats the spec Pig? I.e Whats is it mapped to? , Stock fuel system?, Any timing control? still got MAF? Ect ect Quote Link to comment Share on other sites More sharing options...
Ian C Posted June 1, 2006 Share Posted June 1, 2006 550cc injectors that were running out of duty at 0.8bar............ Dude I did say not to take it past 1 bar of boost absolute max, that looks like 1.2 to me The MAF is still on, stock UK spec cams, no timing control, E-Manage Blue. Also, Pigs car was making 0.8bar boost at 3600rpm in 2nd gear while it was being mapped, which is what you'd expect for a T61 on an auto. I've got all the datalogs - why it's now waiting until 4000rpm to achieve the same boost levels in a taller gear I do not know... I know there have been a couple of plumbing issues between then and now? -Ian Quote Link to comment Share on other sites More sharing options...
lockys96 Posted June 1, 2006 Share Posted June 1, 2006 tell me that standard at the wheels figure Quote Link to comment Share on other sites More sharing options...
BURT Posted June 1, 2006 Share Posted June 1, 2006 for jap cars its approx 220 BHP ATW and uk is approx 250BHP ATW Quote Link to comment Share on other sites More sharing options...
BURT Posted June 1, 2006 Share Posted June 1, 2006 much higher than you'd expect it to be - this isnt making full boost til approx 4600 rpm - as an example Burts car (also auto running a t61) is making full boost from 3400 from what he was saying... why would i lie about it.... yes my setup makes full boost from 3400rpm Quote Link to comment Share on other sites More sharing options...
CJ Posted June 1, 2006 Share Posted June 1, 2006 for jap cars its approx 220 BHP ATW and uk is approx 250BHP ATW Where did those figures come from? Even if you have an outrageous figure of 30% losses that would only give you 286. And why the difference between J-Spec and UK? Or are you subscribing to the theory that the UK BHP figure is much higher in stock form? Quote Link to comment Share on other sites More sharing options...
CJ Posted June 1, 2006 Share Posted June 1, 2006 why would i lie about it.... yes my setup makes full boost from 3400rpm Do you mean positive boost or full boost? Quote Link to comment Share on other sites More sharing options...
lockys96 Posted June 1, 2006 Share Posted June 1, 2006 Where did those figures come from? Even if you have an outrageous figure of 30% losses that would only give you 286. And why the difference between J-Spec and UK? Or are you subscribing to the theory that the UK BHP figure is much higher in stock form? its a mith. 326uk and 276 or whatever because the japs can not bring out cars over 280hp:d the steel turbo makes the extra boost power Quote Link to comment Share on other sites More sharing options...
Alex Posted June 1, 2006 Share Posted June 1, 2006 Pig's dyno sheet is all wrong.... My T61 made FULL boost by 3200 (VVTI Manual). As Ian says he has logs to prove that it was boosting by 3600 on Pig's. I'd say Jon/Pig has run above the recommeded and mapped for boost (0.8-1bar) and has melted something in the engine...the dyno was at 1.2 bar which is above what Ian recommended. His lack of boost till late on would suggest to me he has a major lack of compression. Quote Link to comment Share on other sites More sharing options...
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