Quote:
Originally Posted by moore_rb
If your cam makes your idle sound like a Harley Davidson, and if your engine shakes the whole car while it's idling, then it's a fair bet that tuning an EFI system to work smoothly with that cam is going to take time, effort, and money.
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I can vouch for this! The combination of the lopey cam and DFI 8-stack in the Roush 427IR are a really tough combination to get working at other than sea level. I hear they changed their controller from Accel to something else, but I struggled for almost a year to get a balanced tune that properly accounted for altitude.