Quote:
Originally Posted by sw20kosh
I this because you are revving this car out higher than Perrin? He showed 280 whp with the smaller pulley vs 240 whp with the stock one but all at stock redline. Interesting results.
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For my testing yesterday I was reving the car to 7700-7800rpms.
I was on a low reading mustang Dyno for this test.. A stock car on this Dyno reads about 120-125 whp reads 15-20% less then a dynojet .. Dynopacks tend to read higher then dynojet.
All you need to understand is on a lower reading Dyno the gains are also smaller when compared to a higher reading Dyno. So if you put a exhaust on a car and pickup 20whp on a dynojet , you would only pickup 15whp on a low reading Dyno.
When I was in Cali I used a mustang Dyno and dynojet on the same day.. One Dyno showed 199whp, other showed 240whp
Anyways-
With the smaller pulley I could make up for lack of boost with timing.. I didn't see any real big power difference between 91 and 93 octane... 5whp isnt anything to talk about. I've had similar results with some of the turbo kits I've been working on. No doubt the FA20 motor is a strange beast.
Making max HP is not what I want to do, I want reliable and consistent results.. For me the car needs make the same power at least 3 times in a row on back to back Dyno runs with no cool off...
With 100octane or e85 I would expect a 30-40whp bump In power with the smaller pulley.
John