Hello,

I am in the process of finishing up a new stroker build with a 76mm turbo, MMR turbo grind cams and ported heads. I currently have a tune setup for the stock cams. Will this tune be ok to run with the new cams? I was wondering if the valve timing would be different for this tune with the stock cam lift of .450 vs the .500 lift on the turbo cams. I do not want to hit a piston. Please advise.

Thanks

 

Are you just trying to get the car to the dyno? What tune are you talking about running? If it's the stock tune it won't work for a number of reasons, stroker motor being the main one. You won't hit a piston unless you've screwed up the crank/cam timing but your car probably won't run anyway.

 

It is a tune setup for stock compression, stock cams and the HP turbo kit pushing 18-20#'s of boost. The tune is setup for the 60# injectors and so forth that I have. I was just wanting to use this tune for the first 500 mile break in and then get it on the dyno. But I am a little confused with the variable valve timing on the 3 valve. I am not sure if the valve timing setup for stock cams and their .453 lift will be different then the cam timing for the MMR grind cams and their .500 lift.

 

Don't think that tune is going to work. There's a way to break in a motor on a chassis dyno that works very well. I forget the exact procedure but it can be found on the internet. I would look into doing that with a base tune file.

 

I had that thought of the dyno break in. Thanks for the suggestions!