JamieP Posted October 11, 2011 Share Posted October 11, 2011 Now, Im the first to say a dyno is just a tool for mapping the car but i do find it interesting reading up on how they all compare power results. After my thread on supraforums about the power I made with my car on a 76mm turbo i have been reading a lot of dyno threads, nobody seems to get near that power for the boost I was running on dynojet dynos, I know Ryan is a legend but can he really be that much better? maybe. I know myself and others have claimed to add 15% to these rhhp figures to get the estimated fwhp, We all love the big power figures but Im not sure thats right anymore, I have a feeling these rhhp figures we are getting are infact closer to to fwhp than we think, unless somebody can show me different? I found this an interesting thread, read post 20 where it compares dynojet to dynapack. http://ls1tech.com/forums/dynamometer-results-comparisons/1339390-dynojet-dynomite-dyno-comparison-2011-cts-v-coupe.html I have to say i think these rhhp numbers from dynapack/rototest are pretty much spot on flywheel figures. Discuss Quote Link to comment Share on other sites More sharing options...
Ricky49 Posted October 11, 2011 Share Posted October 11, 2011 You need to get yours on an engine dyno bud next time it's out or going back in. Quote Link to comment Share on other sites More sharing options...
Lee P Posted October 11, 2011 Share Posted October 11, 2011 Glenn K has just had his car on abbey motorsport dyno and it was at SRR a week or 2 before. Would be interesting to see how different that was. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 You need to get yours on an engine dyno bud next time it's out or going back in. I could not be bothered with the hassle tbh mate. Glenn K has just had his car on abbey motorsport dyno and it was at SRR a week or 2 before. Would be interesting to see how different that was. That will be good to see. Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 11, 2011 Share Posted October 11, 2011 Intresting read that, and indicates what your saying is quite true. I should know but I don't, what are the dynos at srr and tdi? Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 (edited) Intresting read that, and indicates what your saying is quite true. I should know but I don't, what are the dynos at srr and tdi? SRR is a dyno dynamics rolling road, yanks call it the "heart breaker" http://www.supraforums.com/forum/showthread.php?631290-PT7175-on-pump-meth-and-Q16-tuned-by-Ben-Phillips TDI is a rototest which seems to be spot on with Dan's dynapack Edited October 11, 2011 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
Ricky49 Posted October 11, 2011 Share Posted October 11, 2011 Where did the 15% come from who decided that's what losses there is between the engine and wheels? Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 Where did the 15% come from who decided that's what losses there is between the engine and wheels? Its an drivetrain loss estimate that some dynos such as SRR use to give you a fwhp figure. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2011 Share Posted October 11, 2011 so you are making too much hp on a dyno knows as a heart braker? Quote Link to comment Share on other sites More sharing options...
Bailey. Posted October 11, 2011 Share Posted October 11, 2011 "the heart breaker" I like it, I have seen the figures from tdi and thought they are high in comparison, but as you said in your first post " I think of it has a mapping tool" and the figure is mostly for bragging rights. Nice topic blw!! Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 so you are making too much hp on a dyno knows as a heart braker? No, you are getting dynapack and dyno dynamics mixed up. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2011 Share Posted October 11, 2011 oh , ok so srr is under rating? Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 oh , ok so srr is under rating? Depends what you compare it to, IMO SRR is pretty much spot on but most likely reads lower than any other dyno we use, its just not great for very high bhp cars due to traction issues. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 11, 2011 Share Posted October 11, 2011 im with you. Quote Link to comment Share on other sites More sharing options...
DARETT Posted October 11, 2011 Share Posted October 11, 2011 For a fair test yo u need a back to back hub dyno against a dynojet comparison The dyno dynamics just won't hold the power. I've also witnessed a difference of 8% just depending on how the car was strapped down on the dyno dynamics. Dyno cells also make a huge difference and the one you used at dan's place is really top class. That extraction setup he has there is a huge advantage over other places and must make a difference Alot of the US places just have a fan in front of the car in the room, and don't had designated dyno cells like we use here Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted October 11, 2011 Share Posted October 11, 2011 personally i think dans dyno is over reading - or the WHP on the dyno is actually the FWHP. what does other think ?? i really think another dyno day is in order. i think jamies is more like 1100 and hodge is like 780 on another dyno. still great results. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 personally i think dans dyno is over reading - or the WHP on the dyno is actually the FWHP. what does other think ?? i really think another dyno day is in order. i think jamies is more like 1100 and hodge is like 780 on another dyno. still great results. Its hard to say they over read or tar Dan with that brush, its been proven Dan's and TDI's dyno are almost spot in in there readings, Also Dan/TDI dont give fwhp readings, none of the hub dynos will give you a fwhp reading, us customers are converting the numbers. But id say you are about right on the numbers, i think the rhhp numbers these dynos give out are pretty close to fwhp. Quote Link to comment Share on other sites More sharing options...
H7ERO Posted October 11, 2011 Share Posted October 11, 2011 (edited) I was under the impression the Dyno measures drive train resistance itsself on the coast down after the run to calculate the FWHP figure. Edited October 11, 2011 by H7ERO (see edit history) Quote Link to comment Share on other sites More sharing options...
DARETT Posted October 11, 2011 Share Posted October 11, 2011 I'm 100% sure abbey's dynapack doesn't show fwhp. They tune John bradshaw's drag car there Which was dyno'd on an engine dyno before it came into the UK. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 I'm 100% sure abbey's dynapack doesn't show fwhp. They tune John bradshaw's drag car there Which was dyno'd on an engine dyno before it came into the UK. How can they know? what was the hp difference and what losses did they use to work out they are right with his engine dyno results? Quote Link to comment Share on other sites More sharing options...
DARETT Posted October 11, 2011 Share Posted October 11, 2011 (edited) Just checked and the beams racing car made 1476 on the engine dyno. It reads around 1200 at abbey on the dynapack Also KDW made 1500whp on a dynojet and would have matched it on the dynapack had the dyno been able to measure that power. Edited October 11, 2011 by DARETT (see edit history) Quote Link to comment Share on other sites More sharing options...
Ricky49 Posted October 11, 2011 Share Posted October 11, 2011 I got dynoed at Dans place and TDi with the only difference been the size of the fuel injectors. Everything else was the same same boost the lot and I was 3hp difference between both dyno's. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted October 11, 2011 Share Posted October 11, 2011 But id say you are about right on the numbers, i think the rhhp numbers these dynos give out are pretty close to fwhp.am pretty sure they are and 1100 or 780 , it is no slouch.. i mean hodge is still on stock pistons a real 900 plus on stock pistons.(normally wont last 5 mins). higher figures always look good, i took my r35 to a so called heartbreaker dyno and made 1011 the americans were saying i would make that in whp giving me almost 1200 fwhp (maybe in another dyno) but decided to use the dyno dynamics even though the higher figs sound better. but numbers are numbers the black dyno or these mile events are were the proofs in the pudding. i have no doubt you will no doubt run a true 1300 and high 8s low 9s in 2012. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 11, 2011 Author Share Posted October 11, 2011 Just checked and the beams racing car made 1436 on the engine dyno. It reads around 1200 at abbey on the dynapack Also KDW made 1500whp on a dynojet and would have matched it on the dynapack had the dyno been able to measure that power. Sounds about right but its so hard to compare especially when you are talking different dynos in different parts of the world, maybe im miles off, i dont know, pity your car had problems today, would have been nice to see how the two dynapack dynos compared. Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted October 11, 2011 Share Posted October 11, 2011 I got dynoed at Dans place and TDi with the only difference been the size of the fuel injectors. Everything else was the same same boost the lot and I was 3hp difference between both dyno's.was that a hub dyno and other wheels Quote Link to comment Share on other sites More sharing options...
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