Vortech down on power
Thread Starter
Teching In
Joined: Apr 2017
Posts: 2
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Vortech down on power LS2/317 heads with a mild NA cam.
Strapped a si blower on and made 690 on 93 and meth @ 12psi.
Broke a PAC spring and bent a valve which kissed the piston, opened up and cleaned everything up with no signs of exponential damage other than a dent in the piston. We said screw it and put it back together after sanding down the piston. Compression check after was 160-180.
Swapped the cam out for a CCP jam cam and pullied down for giggles on E85, the result was 640hp. Checked for boost leaks even though makes 18psi at the manifold. Misfired a little, replaced the plugs which fixed that. Drives strong.
AFR was solid, 16* peak on both runs. Kind of at a loss here, going to build the motor but still trying to find ideas to see if it's anything other than a hurt motor.
Strapped a si blower on and made 690 on 93 and meth @ 12psi.
Broke a PAC spring and bent a valve which kissed the piston, opened up and cleaned everything up with no signs of exponential damage other than a dent in the piston. We said screw it and put it back together after sanding down the piston. Compression check after was 160-180.
Swapped the cam out for a CCP jam cam and pullied down for giggles on E85, the result was 640hp. Checked for boost leaks even though makes 18psi at the manifold. Misfired a little, replaced the plugs which fixed that. Drives strong.
AFR was solid, 16* peak on both runs. Kind of at a loss here, going to build the motor but still trying to find ideas to see if it's anything other than a hurt motor.
Thread Starter
Teching In
Joined: Apr 2017
Posts: 2
Likes: 0
I have brand new valvetrain all BTR stuff the PAC dual spring is what broke before so we replaced everything anyways.
Jam cam: 230/242 .608"/.615" 115+4
