I started with their LT1 small block example and added runner length, reduced cam size, reduced compression ratio, closed up the intake, changed head flow, etc, etc but I am still getting 403lb ft of torque and 271 horsepower. What restriction am I missing?

 

Possibly the accessories and exhaust?

IDK engine analyzers at all, but are they giving you GROSS hp? IDK how they could possibly produce NET numbers w/o knowing the car it's in, w/the exhaust that car has, the intake system, the accessory load....

If you take that 271/403 as a Gross number and "convert" it to a NET number, (which there is no standard conversion for, of course), then you'd get about 220/230 hp -especially in an F-bod.

 

I want to say the aluminum head L98 that Holdener dyno'd made over 300 hp but he thought it had a mild upgrade.

 

Think it was a corvette challenge engine or something, thought it had paint on some specific bolts as a tamper protection

 

332hp 394tq for vette l98
362hp 391tq for lt1

for having no accessories and dyno headers Id say holdeners numbers are accurate for stock lt1 and vette l98

 

267/333 for the 305 TPI as well but not sure which camshaft flavor it was. Best guess the LG4 flavor.