Intake manifold modifications

[drewski86]

Originally Posted by NoDOHC

(I polished the rotor faces to 1000 grit, but I doubt that had any effect on the power.) I am using stock S4 8.5:1 rotors (ground down to about 8.2:1)

Are you eventually going to turbo this motor?

Would anyone find it beneficial if I strapped a stock TII manifold on the engine to see how much it kills the VE?

It would be nice to know how much porting the manifolds really helped.

Why does my G-tech show the peak acceleration at 7500 rpm when the peak VE is at 6500 rpm? (Is there something I am missing, shouldn't peak torque and peak VE coincide?)

Peak acceleration should coincide with peak power.

Originally Posted by NoDOHC

186.9 WHP at 7200 rpm

See

I learned that my gut feeling for ignition timing was not accurate as I started with 62 degrees BTDC at 9,000 with 13.8:1 AFR (gave 169 WHP at 8200).

Retarding the timing to 52 degrees BTDC at 9,000 gave me 182 WHP at 7100 rpm

Something is wrong. You should be more around 25-30* BTDC. As far as you are advanced, you should be igniting on the compression stroke which will want to spin the motor backwards which is very bad. Hopefully your numbers are off somehow. I would make a pull at 25* and 13.1 AFR and see what happens. If you're way down on power than maybe your numbers are off but the motor is seeing the correct timing.

One more thing, you seem too focused on torque numbers. I don't know if this is because the g-tech only gives torque numbers but horsepower is what makes the car fast.

[vex]

Originally Posted by drewski86

One more thing, you seem too focused on torque numbers. I don't know if this is because the g-tech only gives torque numbers but horsepower is what makes the car fast.

That is a negative. The true meaning of HP is the application of Torque over time. This means that 1 HP = 550Ft-Lbs/sec.