Quote:
Originally Posted by ekological
The cams are a custom grind. Unfortunately, the details of the engine are the shop's secret as I haven't seen anyone else put out these numbers. The car was dyno'ed on a Dyno Dynamics chassis dyno, which is known as the heart breaker dyno. The tuner said that its numbers are consistently 16% lower than DynoJets, meaning, he has had customers take their cars to DynoJets and report back the numbers. Then to estimate crank HP from DynoJets is between 15% and 17%, which is consistent with the 550HP number the tuner saw when the engine was on an engine dyno. I forgot to mention the reason why I went with aftermarket headers is the tuner's comment that the stock headers were choking the engine after they mapped it with just the intake plenum, stock headers, and race exhaust. When mapping the car the second time around, he said the map definitely changed and there was an uptick at the higher rpms, but he needed to translate because the engine dyno's fuel pressure was in psi and the car is in bar.
I did do a baseline pull with stock engine, stock headers, stock midpipe, Eisenmann race exhaust on a DynoJet at a shop close by. Been crazy busy with work and I'm not too keen on dropping another $200 just for shits and giggles.
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Nothing secret here. 411whp is the same power multiple other stroker motors put out.