03-02-2009, 09:33 AM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,632
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Not Ranked
I have Roush 427IR
I bought my car at the Barrett Jackson auction with about 500 miles on it. I don't think this car ever ran right. At first I attributed it to just the nature of the beast. The weather hasn't been nice enough to take it out to really look at it but when I had the oil changed a couple of weeks ago we started looking at it and concluded that it was missing on at least one and maybe two or three cylinders. Noone around here will work on this engine so I finally got a contact at Roush and he gave me a couple of places to start, one of which paid off.
Yes, the IR Weber stacks are finicky. They are mechanical coupled and appear to have either gotten out of adjustment or were tinkered with without the proper documentation.
This weekend I "re coordinated" them and things run much better. I was able to get through half of the adjustments they called for (without the computer cable) before running into something they didn't account for. More in my CSX4005LA topic.
Suffice it to say that I concur that it is a finicky system but properly adjusted and tuned will be a rocket sled.
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