Keith C Posted March 6, 2005 Share Posted March 6, 2005 Had the car RR'd today. Graph was 284bhp@wheels, which after the atmospheric re-correction (apparently the software automatically 'corrected' down because it was so cold), so the *actual* number going down to the wheels was 306bhp. Last RR I did was 315whp with the same mods, so nice and consistent Not bad, only mods are a full decat and a bleed valve. Best bit is that there's plenty of fuelling - if anything, it's too rich at the top end! I'll get the graphs up at some point. Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted March 6, 2005 Share Posted March 6, 2005 306 wheel hp? Nice Thats about 35 more than standard. What bar/psi do you think you are running? (nice cold day to get it done too) Always helps Quote Link to comment Share on other sites More sharing options...
michael Posted March 6, 2005 Share Posted March 6, 2005 Which dyno was this on? Quote Link to comment Share on other sites More sharing options...
Keith C Posted March 6, 2005 Author Share Posted March 6, 2005 It was on Surrey Rolling Road Peak boost is about 1.2 bar just after the transition, but as it's only a bleed valve it then drops until it's a little under a bar by redline. Peak torque was about 315lbft at the wheels @ about 4800rpm, but again due to the boost drop was down to about 230lbft at the wheels by 6500rpm. Fuelling seemed ok, although a second opinion would be great. At 1600rpm it was at 13.1, immediately before the transition it was 12.5 before dropping to 11.0 at 4000rpm, down to 10.5 at 4200, back up to 11.3 at 4500 with a then very linear drop off down to 10.0 by 6500rpm. This is the graph from a RR day taken a few years back. Car is unchanged mod-wise except for a CW SMIC fitted a couple of summers ago, and maybe a fraction less boost (I turned the bleed valve down one winter to put a stop to the 1.5 bar peaks I saw a couple of times!). The graphs I have today look very similar, although the ones from today are smoother above 4500 (less 'jittery') and don't have that odd peak at 6500. Can't get those up until I can use the scanner at work tomorrow. Quote Link to comment Share on other sites More sharing options...
Keith C Posted March 29, 2005 Author Share Posted March 29, 2005 Ok, finally got the graphs scanned - warning, they're not small! Flywheel At wheels Air/Fuel ratio Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 29, 2005 Share Posted March 29, 2005 All looks good. Nice respectable power figures there. You could probably gain another 20 hp by leaning it off to a more 'normal' level! - Still, better rich than lean. All the UK's I've seen overfuel by quite a lot. Way beyond the point of safety. Still can't figure out why Toyota put 550's in... (No, I'm not saying it's a bad thing... Well, depends how you look at it ) Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted March 29, 2005 Share Posted March 29, 2005 Its called 'over-engineering' Matt Quote Link to comment Share on other sites More sharing options...
Keith C Posted March 29, 2005 Author Share Posted March 29, 2005 How would I lean it out on a standard car? Also, could not increasing the boost above 4800rpm help? Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted March 29, 2005 Share Posted March 29, 2005 How would I lean it out on a standard car? Also, could not increasing the boost above 4800rpm help? Yes... T61? Bob, Over-engineered to under-perform! - I'm not going there again!!!! Quote Link to comment Share on other sites More sharing options...
Keith C Posted March 29, 2005 Author Share Posted March 29, 2005 Not a single! Yet anyway... Nothing I can do while standard? Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 29, 2005 Share Posted March 29, 2005 You can stick an AFC or an E-Manage on there and trim the airflow back a bit. Running above 1 bar of boost = 100% duty on a J-spec, no idea re the UK spec though. That explains the mad richness if you've got 550cc injectors, and the increase in 'fuelling' is possibly a decrease in turbo efficiency at the high end of the rev range - same amount of fuel going in but less air to burn with it, therefore a richer and richer condition occurs... Something Tony spotted with his AEM. -Ian Quote Link to comment Share on other sites More sharing options...
Keith C Posted March 30, 2005 Author Share Posted March 30, 2005 Hmm, do you think it's potentially worth lowering the boost? Or just getting a decent controller on there? Quote Link to comment Share on other sites More sharing options...
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