×

Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

Compression increase on otherwise stock LS 6 L V8

Practical Reflash Tuning

Forum Posts

Courses

Blog

Tech Articles

Discussion and questions related to the course Practical Reflash Tuning

= Resolved threads

Author
768 Views

I recently did a cylinder head job on a 2001 GMC Denali 6. I went with the 706 heads instead of the stock 817 heads which gives a bump in compression from 9.5 to 1 up to 10 to 1. The only other modifications would be at 4 in intake and a set of headers and 3 in exhaust deleting the cats. I'm using HP tuners and was wondering what type of initial modifications to the ECU ettings should I make for the increase in compression? Normally you can add a few degrees of timing to a stock engine but I'm assuming since the compression is higher I would probably be fine with the stock timing table to start with. Let me know what you think?

Hi Jay i would start logging and go slowly watching the logging for knock

the fuel will maybe be a bit leaner but compensations in the stock map will be fine to get a bit of logging done

build your way up the rpm and load ranges

take your time

Regards Ross

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?