wanttogofast

i just bought a set of Xtreme Energy Camshafts from comp cams it says computer tuneing is needed. will i be able to drive the car to the shop to get dyno tuned or do i need to get in put on a flat bed. here are the cam specs Duration 274 deg /278 deg Duration .050 236 deg /240 deg Valve Lift .500 /.500 Lobe Separation 114 deg

0949er

what my car sounded like before my tune:

http://www.youtube.com/swooshonln#p/u/8/GyVRls-bJc0

and then after the tune:

http://www.youtube.com/swooshonln#p/u/6/aGCZGu0r6zo


car didnt run very good w/out a tune, but it ran. I drove my car about 20 min on highway to take it to get tuned. It def made A LOT of engine noise that didn't sound very nice at all. It makes me wonder if I should of even ran it sounding like that (looking back now)

mrtstang

Aren't these cams for a NPI motor?

nickmckinney

If you have stock heads and pistons those are going to bend your intake valves.

nickmckinney

Whenever you take the heads off update this thread with a picture of the eyebrows your intake valves made in the pistons. Thankfully the stock intake valve is so stiff and hard that it can cut into the piston some and self clearance.

wanttogofast

well what type of cams should i put in i have 3.73, 75 mm throttle body, cold air intake, long tubes, high flow cats, and its a 5 speed 2 valve.

nickmckinney

If its a stock PI 4.6 you can't fit much more than 225 intake duration installed at a 110 intake centerline and even that is only 0.020" of clearance. Most of the cams people say are good only give 0.005" of clearance between the piston and valve and thats if your cam gears are dead on at zero which only about half are.