Hi all,
next winter I plan on adding a Weiand 177 to my recently purchased crate 385 Fastburn. To that end I plan on changing to forged pistons, probably new rods (seeing as the ones supplied are only approved to 500hp), a machining job on the heads and a new blower-friendly cam (and a crank if I must...). Hopefully I'll have CR down from the current 9.6 to a more acceptable 8.5-or less.
I want a hydr. roller tappet cam. The car won't be pushed past 6000 RPMs (...probably). My power-goal is somewhere north of 500hp at the crank.
My question is this; what cam to choose? Anyone running a similar setup who can help? Custom grind needed? Or, heavens forbid, is my current cam teh one I should stick with?
When searching the SUMMIT website for hydr.roll.cams for supercharged applications, it came up with a couple of Lunati-cams, but tehy seem to be way off on the durations when compared to suggestions in other posts on here regarding blower cams...
The heads:
Combustion Chamber Volume (cc):62
Intake Runner Volume (cc):210cc
Intake Valve Diameter (in):2.000 in.
Exhaust Valve Diameter (in):1.550 in.
According to the SUMMIT website: "will support in excess of 500 HP"
The current cam:
Cam Style:Hydraulic roller tappet
Intake Duration at 050 inch Lift:208
Exhaust Duration at 050 inch Lift:221
Duration at 050 inch Lift:208 int./221 exh.
Advertised Intake Duration:275
Advertised Exhaust Duration:280
Advertised Duration:275 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.474 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.501 in.
Valve Lift with Factory Rocker Arm Ratio:0.474 in./0.501 exh. lift
Lobe Separation (degrees):112
Hope I have supplied all the info you guys need to work your magic
Any and all help is much appreciated!
PS. The parts I yank out of the Fastburn will go into another 350 I have, so nothing is wasted
next winter I plan on adding a Weiand 177 to my recently purchased crate 385 Fastburn. To that end I plan on changing to forged pistons, probably new rods (seeing as the ones supplied are only approved to 500hp), a machining job on the heads and a new blower-friendly cam (and a crank if I must...). Hopefully I'll have CR down from the current 9.6 to a more acceptable 8.5-or less.
I want a hydr. roller tappet cam. The car won't be pushed past 6000 RPMs (...probably). My power-goal is somewhere north of 500hp at the crank.
My question is this; what cam to choose? Anyone running a similar setup who can help? Custom grind needed? Or, heavens forbid, is my current cam teh one I should stick with?
When searching the SUMMIT website for hydr.roll.cams for supercharged applications, it came up with a couple of Lunati-cams, but tehy seem to be way off on the durations when compared to suggestions in other posts on here regarding blower cams...
The heads:
Combustion Chamber Volume (cc):62
Intake Runner Volume (cc):210cc
Intake Valve Diameter (in):2.000 in.
Exhaust Valve Diameter (in):1.550 in.
According to the SUMMIT website: "will support in excess of 500 HP"
The current cam:
Cam Style:Hydraulic roller tappet
Intake Duration at 050 inch Lift:208
Exhaust Duration at 050 inch Lift:221
Duration at 050 inch Lift:208 int./221 exh.
Advertised Intake Duration:275
Advertised Exhaust Duration:280
Advertised Duration:275 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.474 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.501 in.
Valve Lift with Factory Rocker Arm Ratio:0.474 in./0.501 exh. lift
Lobe Separation (degrees):112
Hope I have supplied all the info you guys need to work your magic
Any and all help is much appreciated!PS. The parts I yank out of the Fastburn will go into another 350 I have, so nothing is wasted
