Interesting dyno comparison - I30tMikeD MEVI turbo vs Nealoc187 USIM turbo
09-14-2006, 12:34 PM
#1
Interesting dyno comparison - I30tMikeD MEVI turbo vs Nealoc187 USIM turbo
Mike's dyno is the blue one (higher) while my dyno is the red one. The dynos were done on different machines, in different weather conditions. Mikes dyno was about 50 deg F, mine about 85 deg F, baro pressure was close to the same (according to the dyno plots... personally I don't put much stock in those dyno file atmospheric conditions, yet another reason not to use corrected numbers).
So yeah, I think we can all agree that mikes MEVI dyno is the far superior dyno in every way. Mike's car is only about 100lbs heavier than my car is. Given this info and nothing else one would assume mike's car to be far faster than mine is. Clearly given our track results, this isn't the case.
Based on the times I've driven mikes car, I would venture to say that my turbo spools more quickly on the street, that's what it feels like to me. Mike will probably chime in, though he's driven my car far less than I've driven his. To me, I'd say that his spool characteristics on the street closely resemble what we saw on his dyno, he sees full boost around 4000rpm. How my turbo spools up though, I would say is not well represented on the dyno. I too see full boost around 4000rpm perhaps a little bit earlier, and yet on the dyno it is clear that I'm not reaching full boost until more like 4500rpm on the dyno. I also could tell that there was a drastic difference between spooling on the dyno vs. on the street. I found myself wondering as I passed through 3500ish RPM "is this thing ever going to spool?" then finally it started to light up around 3800rpm.
At 3500rpm, Mike's car was making almost 40ft-lb than mine was. At 4000rpm, his was making almost 85ft-lb than mine. At 4500, they are within 5hp and tq of eachother, basically the same at 5000rpm and 5500rpm as well. At 6000rpm Mike's making 40whp and 35ft-lb more than mine. Finally at the end of the dyno around 6400rpm Mike's MEVI car is making 65whp and 55ft-lb of torque more than the USIM.
Both dynos seem to read around average from what I've seen. The dyno that Mike dyno'd on was also used previously (a couple years ago) by our friend BriGuyMax when his 350z was stock and when he had intake and testpipes. He put down 245whp stock and 256whp with the intake and testpipes (thought I don't have the runfiles and these were corrected numbers). On the same day I dyno'd there were two VQ35s there. A 350z with intake that put down 240whp, and an Altima 3.5 (can't remember if it was auto or 5spd) that put down power in the low 230s range with intake and exhaust. So neither of the dynos seem to be read overwhelmingly higher than the other, maybe a few percent or 10-15hp, but nothing major.
So, in conclusion - I don't have a clue what the heck the deal is basically
I just thought this was quite interesting the differences between our dynos.Moral of the story is, don't race with dyno sheets
P.s. in case anyone is wondering mike's best ever trap speed was 112mph I believe, and he probably averaged around 109, my best was 120mph, averaging probably 116-117mph, at the boost settings used on the dyno (I see more boost on the track with the same setting on my boost controller that I used on the dyno, I see 14-15psi at the track and I saw 13.5psi on the dyno). Mike's boost values were about the same both track and dyno I think, correct me if I'm wrong.
09-14-2006, 03:08 PM
#3
Neal, same situation happen to me when I did my pull. Even though it was a no name dyno, I was suprised how late and long it took to spool. Like you I didn't see boost set in until almost 3200rpm and full @ 4500rpm. On the street, I see boost so much sooner (1psi-2psi @ 2krpm and full 8psi @ 3600-3800rpm in 4th), its quite deceiving. I really need to get my car to a dynojet or a mustang. Since I have a DEK, I would like to compare my dyno plot with yours and Mike's.
09-14-2006, 09:06 PM
#7
Interesting dynos yes. I'm not surprised you'd spool quicker on the street though. More load than on the dyno for the same rpm typically. Oh and please send me both run files too... dvrditar @ hotmail dot com... Thx.
09-14-2006, 11:54 PM
#9
No they're not even close to the same turbo or same piping setup. Point is that mike's spool on the dyno seems to be very close to what his is like on th street, whereas mine on the dyno is vastly different than it is on the street.
09-15-2006, 07:23 AM
#10
Senior Member
Join Date: Aug 2000
Posts: 2,151
Originally Posted by Nealoc187
No they're not even close to the same turbo or same piping setup. Point is that mike's spool on the dyno seems to be very close to what his is like on th street, whereas mine on the dyno is vastly different than it is on the street.
09-15-2006, 09:47 AM
#11
Gotcha...I'd try a different dyno before you get too concerned.
Originally Posted by Nealoc187
No they're not even close to the same turbo or same piping setup. Point is that mike's spool on the dyno seems to be very close to what his is like on th street, whereas mine on the dyno is vastly different than it is on the street.
09-18-2006, 08:16 AM
#15
Originally Posted by I30tMikeD
About the only thing I can conlude is that the turbo I30 is far superior to Neal's car.
So looks like you really need to get a variable intake going, and Mike's old car needs to have an EU and the boost controller hooked up. I'm kinda curious what the i30 would trap at with a better 60'. Seems that you would still be quicker though. Might need to keep this comparison going just for the hell of it
Thread
Thread Starter
Forum
Replies
Last Post
litch
4th Generation Maxima (1995-1999)
123
01-04-2024 07:01 PM