estimated gains?!
I put on a Blackwing 160 deg thermo and a street tune by ECS and l could care less about rwhp. When l hit the gas it feels like a different vette from before l had ECS give me their tune. The shift points also helped.
While l can't talk about other tuners but l can say is that ECS knows their business.
Good Luck
Alan
I just dyno'd a week ago with only catback (which I doubt added any power) and put down 300hp/320tq.
Thought I'd throw that out there to give you an idea of where you might be.
I did add a vararam last week (after the dyno) and although I do feel a difference in power I wouldn't expect it to be more than 10-15.
I did put down a 13.02@108 1/4 with a slightly messy launch a few days ago after installing the vararam. I expect given a couple more runs (it started raining after I did my run) I could get a high 12.xx. (I wanted to launch at 1500 and only got it to 900 before the lights started going on me and I was stupid and completely filled my tank before I ran).
Hope all that helps, all are very recent numbers and similar to what you are doing.











In my experience at Xtreme - stock C5's with an A4 usually are in the 280-290 range for horsepower to the wheels.