Removed section 2 of exhaust system to ensure the lack of gaining more hp is not the exhaust system piping diameter I am running is 63.5mm dual. Very very loud pure race track set up, after the test I installed back the section 2 for street use, no loss of power.
After many many tests and experiments this is the absolute maximum what can be made from absolute bone stock S38-B36 without internal changes put on crappy California 91 Gas. Yes all stock, 10:1 CR, stock head ports, stock 46mm ITBs, M88/3 headers (the S38B36 are better vs. M88/3 but fitment issue in E24/E28 chassis, the S38 B36 are better headers but by very minimal)
Stock OEM heavy pistons with long side skirt, stock rods, stock ECU. Bone stock.
Upgrades are: Intake and Exhaust camshaft, custom LSA, Dual 63.5mm exhaust system, Turbo Joe custom tune.
If interest I do offer many options for S38/M88 engines www.EuroClassicMotors.com
