If you contact JWT, I'm sure the'll confirm that you need to raise the idle speed for those camshafts. Are these the S2's? If so, it says right on their website that ECU tuning is required. Since you already have a turbo on the car, you might want to consider stepping up to a Turbo XS UTEC or HKS V-Pro.
'08 Mustang GT/CS
'87 Nissan Hardbody - The "Mud Mobile" (454,000 miles and still counting)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.