cam selection for a blown 505

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paul smart

paul smart

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hi there people in just about to pop for a cam for my blown stroker build and curious to see what peoples opinions are and if they've had luck running a combo like mine

hers the specs
440 rb block with eagle 505 stroker
4.25 stroke 7.100 rod
ported 440 source heads
approx. 8.5 to1 compression
6-71 blower with 10 percent boost\
twin holley 750 blow thru carbs
gear drive timing
blower shop intercooler
4 speed 18 spline hemi trans
456 gear with a 30-31 inch tire

with that said this is what I have and if needing any improvement please share I also have a new 150-200 shot nos kit that can be added

im hoping to creep up on 800 horsepower without the juice just on motor so opinion away please:burnout:
 
there are a lot of variables to your build in order to choose the correct camshaft for your combo, cfm of the blower? Flow chart numbers for the heads you have and valve size and spring pressure, intake runner size? If you could post these things it could help. A cam that worked for someone else's engine combo similar to yours still won't guarantee the same results for your exact combo. Good luck! I am sure there will be tons of replies and hopefully they can help. But the more specific info you provide will help a lot.
 
Let's start: Has this actually been assembled? Cam timing events would help,(Ya think?) Clearance on rod and main clearances? You don't assemble a time bomb,like this. Do you understand, what you are assembling ?
 
I would talk to Steve Morris Racing. They will ask you for a lot more info than what you have given, but once they have the answers, they will design a cam for your specific needs and have it ground and shipped to you. They are a little more pricey than an off the shelf cam but you are getting what your combo needs.

Jack
 
10% OverDrive from a Large Bore 6-71 on a 505CI engine will have around 8PSI of boost.
However, using a SuperChiller Intercooler will drop the boost to around 6PSI.
I strongly recommend an 8-71 blower.
The 4.56 gears are overkill, 3.55s would work well.
The carbs must be "power valve referenced" blower carbs, do not use "blow thru carbs" for this application.
 
I could go over my Procharged 496 Wedge build with you sometime, if you wanted. I talked to Tim at Bullet extensively about the solid roller I ended up going with from them.

Also, is this a factory block you're going to use? Because with a roots blower and a 150+ shot... Man, I wouldn't do it buddy. Just my opinion.
 
sorry the carbs arent blow thru carbs they are from another blower motor and worked very well so they yes they are proper for the engine thats being built.it is a factory block witha a stud girdle and arp bolts and billet main caps so iv did my homework on beefing the bottom end to handle the blowe and shot of juice. yes its a factory block
 
650ish lift solid roller 270ish @ .050 ground on a 112-114.
 
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