ORIGINAL: 5spd GT

I have did a ton of research, and some work on ls1 engines.

The ls1 did not have near the cylinder head that the Mustang had.The ls1 was running stock intake and cylinder heads.

The ls1 has many advantages, like a 3.62" stroke, straight shot into the intake, 10.375" (I measured) intake runner, with symetrical ports (not staggered like an EFI stang orworse, a carb), 75mm Opening TB, 9.24" deck, larger base circle camshaft, injector positioning, and can still knock off 30 MPG (documented).

Back to the "high port" cylinder heads that the ls1 has, which equates to a straight shot to the combustion chamber. The ls1 features a 200cc runner volume head, with 2.00" valves on the intake and 1.55" on the exhaust.

Those head ports are also a taller design, which also allows for a better fuel injector placement sprays the fuel on top of the intake valve, while a 302 design sprays it near the end of the lower intake runner ports.

Also the ls1 heads have 15* valves, compared to 20* valves of a standard 302 design. A shallower valve angle (15*) becomes less "shrouded" by the cylinder wall with that angle approach. It also puts the intake valve closer to the piston center, which in turn allows for a larger intake valve, i.e., 2.00" on the intake side.

The ls1 heads also come with 8mm valvestems and lighter valvetrain, as opposed to a 302's standard size of 8.73mm valvestems. The ls6 heads are even better, down to sodium filled exhaust valves.

4 bolt aluminum block that is 0* balanced.

I have also measured the mean cross section on an ls1 intake.

Go back to the thread, and see which one made more average HP and TQ. Or are we just concentrating on peak torque?

Which one had more compression (347 was 11:1)?

Would you like to guess which has more streetable assets as well?