V Posted July 26, 2004 Share Posted July 26, 2004 Had my car dyno'd at JAE to help sort out my problem with dropping revs occassionally at 4.5-5k. yr 2000 6sp manual VVTi CAT back exhaust (Bullet) K&N replacement panel filter HKS bov Otherwise standard engine. Seems to be pulling ok, but it did show the problem, which is a good thing i suppose - at least it can be repeated. I also tightend up the bov which done diddly squat. Now going to check the hoses and smic (+standard bov), although the guy at THOR said it could also be the CAT's which would be his first guess. I was quite pleased with the result, even though of my drop when no.2 is well on. Please pop you thoughts/comments down. Regards Stephen V Quote Link to comment Share on other sites More sharing options...
V Posted July 26, 2004 Author Share Posted July 26, 2004 DYNO 1 TORQUE & BHP Quote Link to comment Share on other sites More sharing options...
V Posted July 26, 2004 Author Share Posted July 26, 2004 DYNO 1 TORQUE & AFR Quote Link to comment Share on other sites More sharing options...
V Posted July 26, 2004 Author Share Posted July 26, 2004 DYNO 1 PRESSURE Quote Link to comment Share on other sites More sharing options...
LeeT Posted July 26, 2004 Share Posted July 26, 2004 not bad at all. tim wildman went on with his stock VVTI and only managed a 237bhp IIRC at the hubs. Quote Link to comment Share on other sites More sharing options...
V Posted July 26, 2004 Author Share Posted July 26, 2004 hmm... That would seem to be in line with the stated 280hp out of the factory - probably. i dont know what others are getting. But i dont really see my mods to be that much of a power improvement, especially estimated 360hp from the engine. Cheers Stephen V Quote Link to comment Share on other sites More sharing options...
Dragonball Posted July 26, 2004 Share Posted July 26, 2004 Not that bad a result for a cats in stock m8 Just some initial comments - and prob not worth diddly Really nice pull from the first turbo! Second turbo might seem overly poor? Boost drop at advent if second coming on line 3750 seems excessive(?) Fuelling seems overly rich after 4000 revs - losing you some power there Probably right to check your hoses - wonder if the pre-spool of the second might be losing some pressure? Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Well that all looks very healthy to me. I wish my decatted RZ made as much torque as your VVTi does. That's going to be great fun once it's been decatted! Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by V estimated 360hp from the engine. All this adding 20% is very dubious IMO. I think it was Terry Saunders that was saying we should treat the Thor numbers as the Flywheel figure rather than the hub figure, I tend to agree. Quote Link to comment Share on other sites More sharing options...
V Posted July 26, 2004 Author Share Posted July 26, 2004 Originally posted by Paul E Not that bad a result for a cats in stock m8 Just some initial comments - and prob not worth diddly Really nice pull from the first turbo! Second turbo might seem overly poor? Boost drop at advent if second coming on line 3750 seems excessive(?) Fuelling seems overly rich after 4000 revs - losing you some power there Probably right to check your hoses - wonder if the pre-spool of the second might be losing some pressure? Yes, I agree with all thoughs points Paul. I'm trying to track it down. 1st T is doing wonders. 2nd is the problem. It seems to be more prominent when i floor it at about 3.5k rather than starting really low down in the rev range, as if it related to no.2 coming on line. I've only really noticed it once i changed from the standard panel to the K&N and changed the standard BOV to the HKS. I've checked the visable hoses, so i'll now start probimg further. Will go back to normal setup and see if that does anything as well. Many thanks SV Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Jake All this adding 20% is very dubious IMO. I think it was Terry Saunders that was saying we should treat the Thor numbers as the Flywheel figure rather than the hub figure, I tend to agree. I dont agree. When my car was dyno'd at G-Force it put out 263RWHP (323bhp estimated with an 18% loss), running totally stock with no problems, now do you think thats normal figure for a car sold as being 326bhp? or should I think my car has 263 bhp - which it doesnt. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 I was reffering specifically to Thor figures though Rob, yes your figures seem to tie up. Mine seemed a little too high to me. I'll leave it at that - don't want to hijack the thread. Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted July 26, 2004 Share Posted July 26, 2004 Well yeah, mine hit the 306 mark at Thor being totally stock but for cat back exhaust system, but theres no way its making 360+ bhp imho. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Jake I was reffering specifically to Thor figures though Rob, yes your figures seem to tie up. Mine seemed a little too high to me. I'll leave it at that - don't want to hijack the thread. Just realised that G-Force might be an event that Thor was at. I thought you meant you had it dyno'd by a company called G-Force Quote Link to comment Share on other sites More sharing options...
Suprash Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Jake Well that all looks very healthy to me. I wish my decatted RZ made as much torque as your VVTi does. That's going to be great fun once it's been decatted! My VVT-i decatted was making 392 of torque...... EDITED: this was done at Thor.... Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted July 26, 2004 Share Posted July 26, 2004 It had, G-Force is a rolling road in Ayelsbury with a 1200 rwhp dyno http://www.g-force-motorsport.co.uk/rolling.html Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Jake Well that all looks very healthy to me. I wish my decatted RZ made as much torque as your VVTi does. That's going to be great fun once it's been decatted! What figures did you get Jake? Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Bobbeh What figures did you get Jake? 350.5 Hp DIN @ 1.17 Bar and 5900rpm 348 ft/lb at 4900rpm I was reffering to the torque V's car made on the first turbo, didn't make that very clear - sorry. His stock vvti car makes 280 ft/lb @ 3000rpm, my decatted RZ only managed 250 to 260 at the same revs (seemed to vary up to 12 ft/lbs between runs as well) Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Ashley Willis My VVT-i decatted was making 392 of torque...... Well yeah but that's in TTC isn't it? Quote Link to comment Share on other sites More sharing options...
Suprash Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by Jake Well yeah but that's in TTC isn't it? Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted July 26, 2004 Share Posted July 26, 2004 Yeah Tims figures came in a bit low (I wasn't gonna name him here like you lot though;) ) His was diagnosed as restrictions in the exhaust system ie a buggered cat or box and not a standard power output. His fuelling was also on the side. His print out did say that the power figure was at the flywheel but theres no way that he was running that figure at the flywheel. Quote Link to comment Share on other sites More sharing options...
dandan Posted July 26, 2004 Share Posted July 26, 2004 As a rough idea (and no more) on a manual I say add approx 10-11% to the Thor figure to get a sensible guesstimate. This has been discussed several times and is almost a pointless debate. 20% is certainly waaay over the top. Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by dangerous brain His fuelling was also on the side. On the side of what? Quote Link to comment Share on other sites More sharing options...
dandan Posted July 26, 2004 Share Posted July 26, 2004 I was wondering that too! Quote Link to comment Share on other sites More sharing options...
Jake Posted July 26, 2004 Share Posted July 26, 2004 Originally posted by dandan This has been discussed several times and is almost a pointless debate. 20% is certainly waaay over the top. Pointless? Why? Because nobody has yet got to the bottom of how much the Thor figures are higher than other dynos? I also think adding 20% to the Thor figures is completely wrong, great for Pub Bragging Rights™, but that's about all. We just need to figure out what the actual percentage loss between the hubs and the flywheel is, right? Quote Link to comment Share on other sites More sharing options...
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