HotRod777
Well-Known Member
Car:
1966 Sedan, 383 auto. 2500 Hughes converter, 3.55/grip.
383- .040, forged flat-tops (.018 in hole) .020 steel gaskets. 915 big valve heads, springs good to .550, stock rockers. DP4B, AVS2.
HP manifolds, 2.5" TTI. Light springs and limit-plate in Dist.
Cam is Comp 270H- 224* .050, .470" advanced an additional 4*.
The issue is it idles smooth like a tow-truck. The car is only a driver cruise car but I need more "sound"... not worried about overall top performance.
He is what I am considering:
1) Comp Thumper (227@50 intake on a 107cl)
2) Lunati Voodoo (226@50 intake on a 110cl)
3) Purple 484" (on the 108cl)
4) Leave cam alone and go with 1.6 adjustable rockers. (would make lift .501 and get into the overlap a bit quicker.)
The concern is my piston to valve clearance. The motor was built old-tech so I kinda need the old fashioned cams that used more duration then lift. I have scoped the cylinder and watched the overlap as the intake valve chases the piston down and there is clearance but with no scale for reference its hard to know how much clearance there actually is...
1966 Sedan, 383 auto. 2500 Hughes converter, 3.55/grip.
383- .040, forged flat-tops (.018 in hole) .020 steel gaskets. 915 big valve heads, springs good to .550, stock rockers. DP4B, AVS2.
HP manifolds, 2.5" TTI. Light springs and limit-plate in Dist.
Cam is Comp 270H- 224* .050, .470" advanced an additional 4*.
The issue is it idles smooth like a tow-truck. The car is only a driver cruise car but I need more "sound"... not worried about overall top performance.
He is what I am considering:
1) Comp Thumper (227@50 intake on a 107cl)
2) Lunati Voodoo (226@50 intake on a 110cl)
3) Purple 484" (on the 108cl)
4) Leave cam alone and go with 1.6 adjustable rockers. (would make lift .501 and get into the overlap a bit quicker.)
The concern is my piston to valve clearance. The motor was built old-tech so I kinda need the old fashioned cams that used more duration then lift. I have scoped the cylinder and watched the overlap as the intake valve chases the piston down and there is clearance but with no scale for reference its hard to know how much clearance there actually is...