Tuning, 5600 rpms giving me knock?

[turbo1962]

T49 bolt ons & ALKY 24-25 lbs boost. In drive the car shifts at 5600 into 2nd then about 5400 into 3rd No knock in 3rd somewhere 1st to 2nd 2.8 knock. O2s 804 Timing 131 on turbo teak chip is the high RPMs giving me the knock?

 

[turbo1962]

So do i need to lower the RPMs ?

 

[CanGN]

stock cam, i would say yes for sure, whether that is the cause of the knock?? but for sure should be shifting at around 5200

 

[turbo1962]

Thanks, I will see if i can tweak the governor to shift lower.

 

[brian]

Lowering the shift point is a good idea with the stock cam.

But, in regards to your issue, are the valvesprings fresh or good?

Brian

 

[turbo1962]

I had the heads rebuilt last year, but i do not think they replaced the springs. Seems like like before if i had knock it was in 3rd at wot.O2s 780 Will week springs cause it to knock sooner? I installed the te 61 turbo and i had 13.7 knock with the injectors at max and Alky at max. so i took it off and went back to the Ta 49 turbo. Thanks for the help.

 

[8AV8]

Whats your injector duty cycle at the point of the knock?

 

[turbo1962]

I will have to check the injector pulse, the only thing i adjusted on the chip was 1 degree advance 1st & 2nd. running 42.5 injectors.