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3 minute(s) of a 66 minute read
5-7-2010
A little "suck-cam" video that I finally got up and working.
http://www.youtube.com/watch?v=of9eH...layer_embedded
It's only about an 1/8 mile pass. Maybe less but the 60' was decent at a mid 1.27 IIRC.
Just a follow up to this issue. He changed the plugs and wires and regrounded the AMS controller. The problem seems to be gone. We only got one pass this last Wednesday night as the track surface went away quickly and the impending thunderstorm (that never came) kept them from repreping the track.
5-17-2010
It's mild in that it's all straight out of the box stuff that anyone (disclaimer: with proper tools and knowledge
) can piece together in their garage with the exception of the turbo kit itself. The cam in this car is VERY mild for a solid roller aswell. The only reason that it isnt a hydraulic setup is that he already had the solid roller stuff from the high RPM nitrous build. We try not to spin it over 7500 RPM anyway. I'm pretty sure that power peaks under 7K RPM with this intake. Almost got him on a dyno a couple of weeks ago but then he backed out. I'm not a fan of dynos but it is a great diagnostic tool and would help in this case as we don't have any real data from anywhere else to compare this setup too. I'm not concerned with the numbers themselves as much as I want to see the power curve. I'd also like to see how it responds to more/less timing and more/less fuel. When testing at the track, really small changes get absorbed into the other variables and I am scared to make a drastic change to the tune and end up hurting something. The dyno atleast can tell you if you are headed down the correct path or not.
5-27-2010
Back to the track Friday. He put in a new set of 220# injectors. The 160's were seeing 90-95% IDC. Hopefully they aren't too far off. I'll be tuning it tomorrow night on the street and then at the track for higher boost. Hopefully we wont have anymore issues and he can start turning it up to see how high it'll go.
Did some more tuning today for the new injectors. It was pretty far off. Got it all dialed in pretty close but we are having the issue where the boost just goes away. It is fine at 21 psi. Once we turn it up to 26-27psi, you are wide open under full acceleration and all the sudden the boost is gone. Like no boost at all. Gage reads a couple psi of vacuum but the car is still accelerating like its NA. Best guess is that the BOV is opening up. Not sure what else could cause this problem. Let off the gas. Stab it again and the boost is right back. We are going to put a heavier spring in for tomorrow to see if that fixes the problem. If it pops off again, we may have to try wedging it shut just to rule it out. The drop is so sudden that I think even if both wastegates opened all the way up, we wouldn't loose boost that fast.