Okay my LT1 is now turbo'd and I swapped the cam out for a more boost friendly cam. What tables in tunercat should I adjust?

Old cam....
234/242
578/560 Aprrox cant remember
111+2LSA

New Cam
230/236
.544/.555
114LSA

I am just trying to figure out a 1300-1700ish stumble I have, but it could be due to the 7 month old gas.

I seafoamed the car and put fresh oil in again and it seemed to start and idle smoother, but I havent drove it yet.

What tables in tunercat should I adjust for this?

Jay

 

You need to run a data log to see what is causing the stumble. The camshaft probably isn't making a big difference.

 

yea I have only ran data master in idle and reving. I am thinking its due to the old fuel in the tank. I have to pick up some more pipe to finish my exhaust this week. Once I get all the exhaust on I will take it around the block and see I guess.

Ill post my results from cruising around too


Jay

 

Is it kind of surging?
whats your compression ratio? if it's low it might not like a lean AFR.

 

Compression is 9.8. I didnt get on the car at all. it was like up to 3Krpm half throttle. It should be running rich anyways, the tune is for 12psi with 21* wot timing.

Could also be a rich issue. I didnt wanna get on it due to only having like 2 feet of DP and my neighbors are all older lol

Im gonna finshed the exhaust tonight and take it for a spin!

Jay

 

Well it seems to be running a bit better. I topped up the tank and drove around the block and it seemed good, still needs alot of tuning. Hopefully this weekend Il get it out and do some tuning

Jay

 

I'm talking about while driving normal or cruising, not flooring it.
Is your 1300-1700ish stumble only when you floor it? if so check the timing @ high manifold pressure and low rpm.

 

i had a similar problem with my 2bar setup and all i did was add some fuel in the ve table and fixed it. might work for you.

 

Turned out to be bad gas...I topped it up with fresh 91 pulled a few plugs to make sure and it runs great now!

Boost is amazing! Made like 4psi on a base tune rolling into the throttle in 2nd gear up to about 4500 rpm and it just smokes the tires lol.

I think I am maxing my single 255, so i need to hook my mallory box up and wire my 2nd pump that is already in.

Jay