ls3 418 tuning help....

[slipmag]

i have an 07 trailblazer SS ... ls3 block, thompson motorsports pp1 cam ported 317 heads, Thompson motorsports rods and 4" crank, diamond pistons with a compression check of 215psi. ported intake manifold, 1 7/8 long tube headers and off-road-y....etc

mainly need help establishing a baseline tune. this is my first time doing a stroker and I would like to make sure I am headed in the right direction. went to about -15 on fuel trims when I ran the motor a few minutes on break in.... main things I would like help with is cold start and a/f... thanks

I have attached the tune I am starting with... thanks...

[HSVTT]

I have a really good tune for this combo but with a Fast intake I will send to you on Monday .Sunday your time as it is in my office. Will only work with 95 plus fuel. Made 483rwhp ran 11.3 in a G8.I would retard ignition 5 degrees before driving it was on the limit.

[HSVTT]

I can't open tune on my phone is it SD or Maff? I only have SD tunes for mods like that. How big is the cam?

[schpenxel]

I can't open tune on my phone is it SD or Maff? I only have SD tunes for mods like that. How big is the cam?

Looks like MAF is enabled in the one he posted.

[slipmag]

Yes.. Using maf. Would still like to take a look at what you have though man. .650 cam...

[HSVTT]

Gee that's a big cam I would myself go VE gives you a lot more custom options in the tune. Your setup is very similar to mine I had stock injectors etc. If you put a cold air intake a run VE only my tune won't take much to have a very powerful setup. The maff does restrict airflow at rpm.

[HSVTT]

You will also have to drill a 1/4 inch hole in top of throttle blade. Just so you get enough air at idle depends on your cam overlap.PM Me your email I will send

[slipmag]

Sent you a message bro.

[email protected]

[HSVTT]

Sent you email did you get it?

[slipmag]

Yep. I got it. Will start comparing tomorrow. Thank you