wez_p Posted March 4, 2006 Share Posted March 4, 2006 This is the 2nd time i've had the car dyno'd, once when it was almost standard (non-stock exhaust & it got 334bhp as a calculated flywheel figure @ 4500 rpm on one of those mobile rolling roads) and this time since i went BPU. See attached for the results given to me, which pretty much are what i expected, but just wondered if any experts could validate what i think it's saying? If i understand it correctly, the first printout is saying i got 333bhp at the wheels (we were told that readings were at the wheels for RWD cars & their software didn't calculate the flywheel figures) which gave 344 ft/lbs of torque @ 5500 rpm. Now from searching on here it appears that Thor recommend about 18% transmission loss which would give me just over 390bhp at the flywheel, but their rolling road measures power at the hubs as opposed to the actual wheels. So does this mean that my readout should be more accurate as it actually takes into consideration my wheel & tyre combination? If so, does anyone know exactly what the transmission loss is on a j-spec auto Supra between the flywheel & the wheels? the second printout, i believe is showing that around where the 2nd turbo kicks in, the fuelling goes richer and continues to do so & the time before this it isn't too lean & after this it isn't too rich, i.e. just right? AwesomeGTI (http://www.awesomegti.com) claim to have the most advanced rolling road in the country at the moment & say it cannot get anymore accurate (something i'm sure most places would say!) They seemed very professional & deal mainly with Audi/VW tuning & race preparation, and i would recommend them to anyone looking for a rolling road in the North West who also specialise in group sessions. As you can see i got some consistent runs, i.e. 4 in a row, all about the same power, however, a certain member on here who came along with us scored about 30bhp higher than this but with only one cat removed. So, my other question is whether the difference between running 0.1 - 0.2 bar of boost less than someone else could produce this much difference, as this other member is running at 1.2 bar & i think i'm running slightly lower? Link to comment Share on other sites More sharing options...
Pixelfill Posted March 4, 2006 Share Posted March 4, 2006 however, a certain member on here who came along with us scored about 30bhp higher than this but with only one cat removed. So, my other question is whether the difference between running 0.1 - 0.2 bar of boost less than someone else could produce this much difference, as this other member is running at 1.2 bar & i think i'm running slightly lower? my results are below Wez -- 366 rwhp, though I only got one graph As Wez said above, I was 2 cars after his session, so should have been a consistent rolling road. My spec: Front cat out / rear cat still in, Blitz Nur spec exhaust colder plugs (IK24's) boost at 1.2bar. rest of my spec is in my garage If anyone can shed any light on this I'd be interested too. Mike Link to comment Share on other sites More sharing options...
wez_p Posted March 6, 2006 Author Share Posted March 6, 2006 nice one Mike i still haven't double checked what boost i'm running, according to the gauge, but will do asap Link to comment Share on other sites More sharing options...
wez_p Posted March 7, 2006 Author Share Posted March 7, 2006 the AwesomeGTI website has been updated now all 3 supras got in the league tables http://www.awesome-gti.co.uk/rollingroad.html Link to comment Share on other sites More sharing options...
tbourner Posted March 7, 2006 Share Posted March 7, 2006 Do you have a better fuel pump installed Wez? Thor do a measurement from the hub which is more accurate in the fact that you don't get ANY wheelspin, and obviously the flex in the tyres cause substantial 'transmission' loss. I think it's accepted that losses to the wheels are about 18% and to the hubs are about 9% (ie: half the total losses are through the tyres!!!). Are those readings wheel readings or the calculated flywheel figures? 330 RWHP would be just over 400bhp at the flywheel, otherwise they must have measured about 270 at the wheels!! Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted March 7, 2006 Share Posted March 7, 2006 nice well done wez, i wonder if i can take my t88 there Link to comment Share on other sites More sharing options...
npotts Posted March 7, 2006 Share Posted March 7, 2006 Hi Guys How much did it cost you for this if you dont mind me asking, and how long does it take? Im interested in taking mine there before and after BPU.... Cheers guys Nick EDIT - just checked the website and its £60. Cheers Link to comment Share on other sites More sharing options...
Pixelfill Posted March 7, 2006 Share Posted March 7, 2006 Are those readings wheel readings or the calculated flywheel figures? 330 RWHP would be just over 400bhp at the flywheel, otherwise they must have measured about 270 at the wheels!! Trev the figures were at the wheels, they didn't even attempt to calculate fly figures, which was a plus point IMHO. As for costs, it's normally 60 +VAT for a full rolling road session, presumably includes AFR plots and personal consultation, we went as part of a group, so because there were over 25 cars we got a group session discount, which brought the price down to 29.xx + VAT (£35). Time wise it took about 30 minutes per car, to tie down and then do 3-5 power runs, and untie. Presumably if you were one-to-one they would probably spend a bit more time, and might record more parameters? but with nearly 30 cars to get through on a Saturday they weren't hanging around, although 30 cars wasn't too many I think everyone thought they were getting their moneys worth. I wouldn't hesitate to go back though they were really professional, knew what they were doing, happily coped with Autos, and were really friendly to boot. oh yeah they're also pretty local to me which helps. For those who go to the Mascrat meet it's about 5 minutes from Mascrat roundabout. Mike Link to comment Share on other sites More sharing options...
wez_p Posted March 8, 2006 Author Share Posted March 8, 2006 definitely a professional service, perhaps we should have a MKIV Supra Rolling Road day there for the North West? @Trev - no mate, just the standard j spec fuel pump, as far as i know Link to comment Share on other sites More sharing options...
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