Quote:
Originally Posted by Maddog
Ok to try and make it clearer
This is the WHEEL horsepower from my car before and after uprev
I am realistic and wasn't expecting massive figures, this is my first N/A car after owning a couple of Skylines R33/R34 and an Evo 6 which were all highly modified but I thought it should make 20-30hp more , hell even stock I thought it would be 260hp at the wheels
If you compare my chart with a manual 370z with similar mods PLUS Berks high flow cats on the same dyno (These are flywheel calculations of course)
I do have a set of test pipes I can fit , but will i really pick up 27hp and 20 ft lbs by fitting them ? Are the stock cats really that bad ? |
Flywheel (flexplate?) numbers -- not quite that much, but in that ball park. Expect (dynojet estimated) 12 -15 whp gain.
Also, note that I have never seen any evidence of greater drivetrain losses on the AT as compared to the MT for this car. Full lock up, well designed trans, and CFRP driveshaft must help quite a lot!
Seriously, I highly doubt you are seeing values that are wildly different from anyone else's.
Go through this thread for excruciatingly detailed discussions plus dynos with various mods -- bear in mind that load holding dynos are always highly variable from shop to shop depending on calibration values whereas dynojets tend to be very stable from unit to unit, shop to shop.
Proven Power Dyno Database Thread
It starts getting very detailed by about p. 5.
Go by proportionate (i.w., % change) changes to make estimates -- these measured values are all to the tire; no estimated flywheel numbers from coast down.