Dyno numbers
#16
Just remember, you really need to stick with the same dyno for your baseline and final runs when determining if a mod gave you any measurable increases or not... and, preferably, do it on the same day and / or under the same weather conditions.
Maz
The dynojet is usually the "reference" as far as dynos go since their the most plentiful. The dynapack seems to read high, just as a mustang dyno tends to read low.
As I said, the only "true" measurement of HP is 1/4 mile trap and ET, as all dynos are good for is a "baseline". Besides, a dyno operator can make it read high or low so take each dyno with a "grain of salt"
Take Adrian's dyno for example (and I'm not ******* you bro, you know that ). If he dynoed 289 stock, that's a 17 HP difference from the crank HP number. If you do the math, that roughly a 6-7% drivetrain loss, which is impossible unless nissan severly under-rate the vq motor ( which I doubt is the case). A manual drivetrain loss is in the area of 12-15% while an auto is 17-20%.
The dynojet is usually the "reference" as far as dynos go since their the most plentiful. The dynapack seems to read high, just as a mustang dyno tends to read low.
As I said, the only "true" measurement of HP is 1/4 mile trap and ET, as all dynos are good for is a "baseline". Besides, a dyno operator can make it read high or low so take each dyno with a "grain of salt"
Take Adrian's dyno for example (and I'm not ******* you bro, you know that ). If he dynoed 289 stock, that's a 17 HP difference from the crank HP number. If you do the math, that roughly a 6-7% drivetrain loss, which is impossible unless nissan severly under-rate the vq motor ( which I doubt is the case). A manual drivetrain loss is in the area of 12-15% while an auto is 17-20%.
Incidentally, both shops told me that my car posted one of the highest, if not the highest stock numbers of any HR motor cars that they have tested to date.
#17
Thanksfully the witch in the G fully disables the traction control, so there is no need to pull the fuse.
Also, make sure that the use Manual mode when doing the dyno runs, so the car will hold the gear they use... also, have them try 2nd, 3rd, and 4th gear for the pulls, as the gearing can also effect the final output numbers (the difference isn't usually dramatic, but it's still something to think about) I think my car produced the highest numbers when in 3rd gear.
#18
#20
#21
#24
I think 2GoRNot2G has a 6MT which would automatically read higher than an AT. That would probably account for the biggest difference btw MKai0's dyno and 2GoRNot2G's dynojet numbers.
Of course, if 2GoRNot2G has an AT, well, consider yourself lucky that you have a VERY strong G.
Of course, if 2GoRNot2G has an AT, well, consider yourself lucky that you have a VERY strong G.
#25
jk sorry for the lame joke, this typo just made me chuckle, it was the highlight of a crappy day....
Good thread!
-Kregg
#27
I'm actually an auto, but after driving Travis' (KulG35) car today, now I'm wishing I was a 6 MT! Now that is one fun G to drive!! Incidentally, Travis and I dyno'd together a while back and my auto pulled close to the same HP stock as his 6MT pulled with a full FI exhaust, HFC's, and intake. So, yes, I'm very happy I have a strong G.
#28
If there was days in between then it is what it is, but still 20/30 sounds really high. Was the exact same dyno at the exact same shop? Same gear run? I could be off base here since I haven't looked into gains of HFCs, but I know intake is marginal at best. Haven't looked at UR either, but I can't imagine it's that high either.
If HFCs give you that sort of power, I'm ordering ASAP. Can anyone else clarify that these numbers sound realistic.
#30
I've heard that the HFC's can make up to 12 - 15 RWHP on the HR motor.. and I got 4 - 6 HP (5 peak) across the board from my K&N (same day, same dyno), so 20 HP gain is not out of the question... I'll know for sure if the Berk HFC's will produce those kinds of gains (at least on my car) once I finally get mine in and get them installed.