2008cc 8.75:1 CR 3A G60 build.

Your puzzled I nearly fell over when I saw that wheel figure at Stealth. You seemed to get of lightly that day with only 30bhp loss but I got slapped with over 50bhp loss. I've always thought Stealth gave ridiculous wheel loss figures but yeah not exactly cool to get a piece of paper saying you only have 180bhp at the wheels. I chose to ignore it and now Awesome has backed up the 220 odd wheel figures I got at Chipwizards. Wierdly they all seem to be giving me around 250bhp at the fly. Awesome gave 248.6, Chipwizards 253, and Stealth 251. Maybe it's the diesel gearbox with the 5th gear run and the day old tyres but I put 40psi in them, same as always! Chipwizards dyno's in 5th too but Awesome do it in 4th which explains the slightly higher wheel figure and lower fly figure.

I wanted to put the car on as many RR's as possible so see what each would give. I have to say though I haven't been running around shouting about my piss poor wheel figure at Stealth! All the VR's seemed to lose a lot too that day I couldn't figure it out. I kept converting the KW reading and saying that can't be right 100KW or 130bhp @ the wheels for a VR??

That's it for me now my cars a daily from now on and no longer a dyno queen. Stock air box, and get rid of that check valve. And then when I swap over to J808 stock exhaust with a ported cast manifold.

Yeah that is weird - if anything I would have expected the wheel figures to be similar and calculated flywheel figures to vary drastically. How odd...

If you look at the list the loses are all over the place the first one a 16v only lost 6bhp and then others lost 59bhp. Just as i arrived someone said there was a problem with the rollers and they were fixing them, don't know if it was contributory. A young lad stood near us had figures for his car that were 200 measured 230 corrected and then 160 wheel! I didn't say anything but it was a bit wierd, but it was a good day, with plenty of entertainment and chatter.

Yeah dynos can be misleading sometimes. I know stealth's rollers are bit old, worn and shiney and many cars lose traction on them.

What dynos do Awesome and chipwizards use? If they're American (Dynapack / Dynojet) rollers, their software uses a tiny trans loss figure of around 10-12% to give higher whp numbers to please their domestic market. The actual trans/wheel weight/brake drag/driveshaft/tyre etc losses is closer to 15-20%. Practically every VR6 I've seen loses 45-50hp through the losses....

Not doubting your numbers, of course. 250 @ the fly appears to be your consistent number and measurement method, which is bloody good which ever way you look at it

Yeah Dynojet are a bit more generous at the wheels but they also report less fly power. I'm not complaining. Chipwizards is an old dyno, I've no idea what make it is. It's just a tool for him to tune on.

Nice to see them agreeing on fly power. I think chipwizards gave the most believable figures 253bhp, 27bhp trans loss and 221bhp wheel. It's about 13% loss which is believable, 20-30% loses that you see from some roads just don't seem right.

It's funny you post bad figures and everyone shrugs. You post good figures and you end up in a discussion about the accuracies of the rolling road. I'm not taking offense by the way. Thanks for the kudos Kev.

Absolutely, no offence meant with asking - just thought it was odd that we had such differing losses while having very similar flywheel powers.

As I say no offense taken. Curiosity never killed the cat, he just got pushy! I just made that up!

ctwg60 wrote:It's funny you post bad figures and everyone shrugs. You post good figures and you end up in a discussion about the accuracies of the rolling road. I'm not taking offense by the way. Thanks for the kudos Kev.

Yeah you see a lot of that on American forums They always claim the plot was photoshopped if someone posts a half decent run

Dynos are a good way to get an idea of how well (or bad) the engine is running, but the only way to get a true power reading is to take the engine out and strap it to a bench dyno..... but no one's gonna be doing that any time soon

Rolling roads are all a bit weird imo. The results are always 'calculated'. The only thing they all have in common is they measure torque @ the dyno brake. Power is then a product of torque x distance, so 'fudged' in other words. The most common way Stealth fudge up the numbers to flatter an engine is to make the atmospheric pressure higher and the ambient temp lower.... not that yours needs flattering, but I've seen people nearly reduced to tears from getting 199hp instead of 200hp, so that's when Vince would do some 'tweaking'. But it's all horseschitt cause all dynos have an "error margin", usually around 5% to settle disputes with customers

kevhaywire wrote:I've seen people nearly reduced to tears from getting 199hp instead of 200hp, so that's when Vince would do some 'tweaking'. But it's all horseschitt cause all dynos have an "error margin", usually around 5% to settle disputes with customers

Hahahaha.

I'm pissed off with my figures not being as good as I hoped, but I'm not going to cry over them anytime soon.

I no longer care, I have my piece of paper, and it was worth every penny! On wards and up wards!

Anyway I have more serious issues at the moment. I discovered at the weekend I have a histamine reaction to all beer, wine, spirits the lot WTF am I gonna do with my right hand of an evening now!!!!

ctwg60 wrote:I no longer care, I have my piece of paper, and it was worth every penny! On wards and up wards!

Anyway I have more serious issues at the moment. I discovered at the weekend I have a histamine reaction to all beer, wine, spirits the lot WTF am I gonna do with my right hand of an evening now!!!!

Next you'll find out your allergic to cars and pornography.
Game over.

Oh dear. How did you discover this?

I've know something was up for years, usual symptoms of allergy either straight away or the next day after drinking. But this weekend it was ridiculous had to stay up till 2am before going to bed due to sneezing etc. Apparently all alcoholic beverages contain high levels of histamine. It only ever happens if I drink so...

Merry $cking Christmas!..............NOT!

How will I survive Christmas Day?

ctwg60 wrote:
How will I survive Christmas Day?

piriton.

dirtytorque wrote:

ctwg60 wrote:
How will I survive Christmas Day?

piriton.

I was thinking hallucinogens or some other drugs! I think there's still some morphine left in the cupboard.