I'm getting a set of gt40p heads and I'm gonna ha e them port polished and machined. Does anything need to be milled down to fit with a heavier cam? K352463 is the can kit I got and 143116 for rocker kit from cjpony. Any help would be great!
What kind of power levels are you looking for and whats your rough budget?
Id rather upgrade to a set of aluminum heads, even if it means eating Saltines and water for a few weeks.
I'm getting a set of gt40p heads and I'm gonna ha e them port polished and machined. Does anything need to be milled down to fit with a heavier cam? K352463 is the can kit I got and 143116 for rocker kit from cjpony. Any help would be great!
I used GT40P heads on my V8 Ranger. Fully ported with the Trick Flow Spring kit, OE style flat top pistons with 1605 compression height and the XE264XR-14 cam with 512 lift and 1.6 rockers. There was plenty of piston to valve clearance. The heads were milled a couple thousand but the block deck was stock. 58cc gave me approx. 9.25 compression. I love the combination, it makes a great daily driver and can get 22 MPG when it needs to.
did you dyno it yet>?
No, I really don't plan to have it dyno'ed. I had a custom mail order tune done and revised by data logging a few times. It is dialed in pretty nice for what it is. It is well mannered, drives consistent 8-10 hours a day without beating you to death and has plenty of stop light to stop light power. It isn't anything crazy but sure is a lot of fun. You can definitely tell a big difference from the stock 5.0 set up. An estimate on rwhp is probably 275 on the lowside and 295 on the highside. It is mostly OE style parts, everything is new but most of the time and money was spent on quality machine work and balancing everything down to +/- .5 of a gram. Here are a few photos and the basics on the head work.
1. Trim and knock down the valve guide bumps in both intake and exhaust bowls
2. Back-cut the intake valves for better flow
3. Widen the push rod pinches to gasket-match the intake ports
4. Rough edge cleanup on the bowl / Bowl Blending
5. Increase & smooth the short side radius in the intake port
6. Raise/lower the intake port floor
7. Gasket match the intake ports
8. 3 angle valve job
9. Surfaced
The upper was gasket match ported and the lower was completely ported the entire length of the runners as well as gasket matched on both ends.