michael Posted September 14, 2003 Share Posted September 14, 2003 I took my UK Auto down to John Noble's for a dyno run yesterday and was hoping for some feedback on the results if possible. Click here for the plot As you can see (hopefully) I got these figures: 341bhp @ 6254rpm (126mph) 308.2lb/ft @ 5092rpm The car is standard apart from a pair of Chris Wilson decat pipes and a Nur Spec-R exhaust, it was running 11.5psi of boost as a result of the exhaust mods according to the gauge on the rollers. So my questions: 1. I was expecting a bit more BHP with the exhaust mods, am I right to? 2. Where is my torque? I was under the impression I had 325lb/ft as standard and from what I can tell the car is healthy. 3. Is the auto box causing these figures to differ from the ones quoted? I presume Toyota get their figures on an engine dyno. Maybe their software wasn't clever enough to suss the auto out? 4. The rolling road guy did the run with the 'box in manual mode in '3rd' with the O/D and traction control turned off - is this the way to do it? 5. Compared with other dyno runs I've had on other cars Noble's were very progressive, they raised the revs slowly to peak to get a reading, other places just seem to hammer it - would my figures suffer as a result? 6. Should I be happy with these figures? 7. I took it down there to check the car was running OK really so that I could up the boost etc - I wasn't expecting anything silly but a little more than a 15bhp hike having read all about the exhaust being very restrictive - has anyone else dyno'd a similar car and if so what were the results? 8. I want more now - 15psi OK? Sorry for all the questions and the long ramble, just want to make sure the old girl is running OK Quote Link to comment Share on other sites More sharing options...
GavinL Posted September 14, 2003 Share Posted September 14, 2003 Raising the boost gives you the additional power, taking the cats out and putting in a free flowing exhaust is just a means to that end. If you had dyno'd the car at 18psi not 11.5psi you will have seen a much bigger power output. With this in mind I would suggest that the modest improvement in boost levels is consistent with the modest improvement in BHP. Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Cheers Gavin, just need my boost controller to get sorted out then so I can have a bit more of a play. For some reason I had it in my head that the decat and exhaust would make more of a difference but as you say I guess I've just paved the way ready for other mods to take advantage of the improved breathing. Any idea where my torque has gone though? Normal for the auto 'box? Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted September 14, 2003 Share Posted September 14, 2003 Here was my plot of a completety stock MkIV (many moons ago ) Pete's Stock MkIV Dyno Plot. Not too dissimilar. Do not be dismayed. The exhaust mod will NOT guarantee you more boost and more power, the amount varies between cars. Get that boost control in there and up it to this.... Mark's dyno run (with boost leak problem!) Regards Pete Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Those Dynapack graphs are very pretty Interesting to see some more feedback, I'm really wishing I'd had it on the dyno when it was standard so I had a true comparison but that gives me something to go on. Quote Link to comment Share on other sites More sharing options...
Gaz Walker Posted September 14, 2003 Share Posted September 14, 2003 Mike, Thats a very good result and proves the car is healthy. When you wack the boost up, thats where you'll notice the power gains. Gaz. Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 14, 2003 Share Posted September 14, 2003 FYI I got 393BHP at 18PSI http://www.kulthea.net/welllane/pic/dyno.jpg Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Originally posted by Gaz Walker Mike, Thats a very good result and proves the car is healthy. When you wack the boost up, thats where you'll notice the power gains. Gaz. Awaiting an AVC-R then in that case sir Quote Link to comment Share on other sites More sharing options...
GavinL Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by Thorin FYI I got 393BHP at 18PSI http://www.kulthea.net/welllane/pic/dyno.jpg That's the oddest BHP plot I have ever seen of a TT supra, no dip and immediate rise as the second turbo kicks in. Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by GavinL That's the oddest BHP plot I have ever seen of a TT supra, no dip and immediate rise as the second turbo kicks in. Yep I know, no idea why it's like that at all. There's certainly a big kick when the second turbo comes online, dunno why the graph doesn't show it! Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Originally posted by Thorin FYI I got 393BHP at 18PSI http://www.kulthea.net/welllane/pic/dyno.jpg I was actually thinking about your car while mine was being done (I was there for the Well Lane run) but for some reason I thought you were running whatever boost the decat and exhaust had given. So I have a bit more boost to play with then - I was thinking 1.2 bar which is about 17.5psi isn't it? I guess another 6psi on what I'm running now will be quite noticable, it'll be interesting to see how the 1/4 times compare given my 13.8 when the car was totally standard Quote Link to comment Share on other sites More sharing options...
GavinL Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by Thorin Yep I know, no idea why it's like that at all. There's certainly a big kick when the second turbo comes online, dunno why the graph doesn't show it! I would try your car on Pete Betts dyno and disregard that run if it were me. Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by mcanny I thought you were running whatever boost the decat and exhaust had given. I am I've got the superior J-Spec model where decat and exhaust gives a free boost increase too Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by GavinL I would try your car on Pete Betts dyno and disregard that run if it were me. Yep thats the plan. I know those power figures are about right though, just the graph is a bit funny. Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Originally posted by GavinL That's the oddest BHP plot I have ever seen of a TT supra, no dip and immediate rise as the second turbo kicks in. Well Lane's software appears to have a bizarre feature where they can smooth the graph out if they like and disregard specific parts - I've seen them convert a wiggle into a squiggle a few times and I suspect this plot got the same treatment. Quote Link to comment Share on other sites More sharing options...
michael Posted September 14, 2003 Author Share Posted September 14, 2003 Originally posted by Thorin I am I've got the superior J-Spec model where decat and exhaust gives a free boost increase too Bah Are your lights clean though? Do you know how cold it is outside? Dare you risk getting out to clean your lights without knowing the temp? Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 14, 2003 Share Posted September 14, 2003 Originally posted by mcanny Bah Are your lights clean though? Do you know how cold it is outside? Dare you risk getting out to clean your lights without knowing the temp? Cold you say? Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 15, 2003 Share Posted September 15, 2003 This is more what a RR graph should look like for a TT http://www.sxoc.com/pics/powergraph.jpg Note that the torque curve is *not* using the same scale as the power curve, and the drop off at the end was due to the 'untracable actuator hose leak' not being able to keep the boost up (drops from 1.2bar at peak to 1bar at redline. Quote Link to comment Share on other sites More sharing options...
michael Posted September 15, 2003 Author Share Posted September 15, 2003 It's nice to see all these other plots Out of interest what is your actually BHP then - the actual measured or the 'corrected' figure? And why is it corrected? Just trying to understand how all these different dynos get their readings. Nice torque output but I'm suprised at the BHP, isn't that a little low for BPU even with the boost leak? Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 15, 2003 Share Posted September 15, 2003 I dunno about the numbers themselves - I did the run in 4th instead of 5th (I thought 4th was the 1:1 gear - it's not) , so the numbers are doubtless inaccurate. My main concern when doing the run was to check that the car was running and fuelling properly, which it is. Also my peak power is lower than it could be due to the shagged IC I had at the time, plus the boost drop off. A proper boost controller would sort that out. Quote Link to comment Share on other sites More sharing options...
michael Posted September 15, 2003 Author Share Posted September 15, 2003 Any idea what the auto equivalent of the 1:1 is or doesn't it matter? (another dyno booked for the start of Oct so I want to make sure it's all done right - hopefully I'll have an AVC-R by then too - hint hint Gaz ) Quote Link to comment Share on other sites More sharing options...
Keith C Posted September 15, 2003 Share Posted September 15, 2003 Don't know, but 3rd is probably the best gear. Quote Link to comment Share on other sites More sharing options...
Thorin Posted September 15, 2003 Share Posted September 15, 2003 Third with overdrive off I think. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted September 15, 2003 Share Posted September 15, 2003 You'd do a run in .... 5th for a 6speed box 3rd for the four speed auto with manual mode selected and overdrive off. Reards Pete Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted September 15, 2003 Share Posted September 15, 2003 Originally posted by Keith C Don't know, but 3rd is probably the best gear. I think mine was done in 3rd. I'll try and put the graph up later. Quote Link to comment Share on other sites More sharing options...
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