APS TT + Pulleys v. APS TT + Pulleys + Test Pipes (notice the 40+lb of torque increase between 3-4K rpm even though the peak # only increased by 10lbs



Here is the APS + Pulleys + test pipes v. tuned Vortech + full exhaust v. Stock (notice that the peak horsepower difference between the APS & Vortech is only 11 but between 3500 and 5500 ranges between 40 and 50 rwhp difference)

 

damn, 75+ft lbs difference in the mid-RPMs between APS & Vortech... amazing what two snails can do to the area under the curve...

I see the difference the test pipes made (and expected that) but what I'd like to see is a comparo between test pipes and high-flow cats of some sort (for those not quite as daring) - at any rate, numbers look great... I wish my car could put down those kind of numbers! (all in due time )

 

why is your aps tt only making 389 whp???

 

How much boost on the APS TT and how much on the Vortech?

 

389wp is pretty decent with an APS at stock boost settings.

I noticed the same thing when swapping to test pipes, and a free flowing exhuast. Peak increase was marginal..about 10-13whp, but the trq and WHP curve across the board was tremendous. Test pipes work wonders for the midrange.

 

I thought the base aps kit makes about 410 and 430 with test pipes, I must have read that wrong

 

This dyno may have been without any tuning.

 

This is a straight out of the box untuned dyno for the APS. I'll be tuning it once the water injection kit is finished and I return from Unichip training in Oregon.

I beleive the 400-430 numbers have been with a full exhaust. The APS boost is 8.5psi and I beleive the Vortech was 8.5 or 8, whatever the stock Vortech kit makes without an upgraded pulley but with tuning.

 

Those curves are the reason I went with TT rather than SC much better midrange power, thanks for charts.