Team Chevelle banner

1 - 15 of 15 Posts

·
Registered
Joined
·
116 Posts
Discussion Starter #1
Based on my research and the advice i found on this site, this is what i came up with for my future build. I have all the parts listed. Do you see any potential problems that may occur? What do you think the expected rpm range the following cam would be and expected horse power? thanks in advance



496 eagle "chris straub" rotating assembly
Edelbrock 60459 heads
60623 Voodoo hydraulic roller
lunati 73121 springs
Gen VI timing set and retainer GMPP
Comp Cams retro fit rollers #887-16
rpm intake
850HP street holley
moroso 2043 oil pan
 

·
Registered
Joined
·
635 Posts
Brandon, What compression will you be going with? Chris would be the best bet on cam and lifters since you must be already dealing with. He's one good cam guy. He will work out a good combo.
 

·
Premium Member
Joined
·
6,188 Posts
May be a tad light on the carb cfm's. With a 950 that combo should get you close to 600hp.
 

·
Registered
Joined
·
116 Posts
Discussion Starter #4
i have 18cc domes about 10.6 compression
 

·
Registered
Joined
·
13,880 Posts
Looks good to me! Let her rip.
 

·
Registered
Joined
·
116 Posts
Discussion Starter #6
What kind of rpm i should expect with this setup?
 

·
Premium Member
Joined
·
6,807 Posts

·
Registered
Joined
·
116 Posts
Discussion Starter #9
Chris Straub gave me the option of 18cc domes or 3cc flat top. The flat tops are 300 dollars cheaper. The domes give me around 10.7 compression and the flat tops around 9.8 he said. Should I pay the extra and get domes or get the flat tops. I was thinking i could get my heads milled to boost the compression a little. What do you guys reccomed?
 

·
Premium Member
Joined
·
9,493 Posts
Pistons, then no problem with manifold alignment. A 950 HP is an 830 cfm carb. A 850 HP would be smaller, I would have to look up the actual CFM.
 

·
Registered
Joined
·
635 Posts
Bradon, How are your heads? I went with the 18cc pistons and the Edelbrocks for 10.4 compression. What are you getting charged to mill the heads if you get the flat tops? That $300 diffence now gets reduced.
 

·
Registered
Joined
·
13,341 Posts
Brandon, I think those valve springs will be a liitle light. Set up per Lunati spec they will have 142 seat / 377 open. Shim'd .040 to 1.900", nets 157 / 392. Closer but still a little light over the nose. I've ran 340 rate springs, set at 125 seat, that was a disaster. From there, went to a 432 rate spring, set at 166 for 425 over the nose. Those worked well on a .600" lift hyd roller with a Comp 854 lifter. Next up was a 408 rate beehive, set at 160 seat for 425 over the nose on a .650 lift. These seemed to work ok. Although, my gut tells me, the 425 over the nose was not enough at .650 lift. .650 lift cam is going back in with either the 408 rate beehives set at 1.900" to net 180/445 or a set of Comp 953's I have that will get set up at 160/467. Limiting factor on the valve springs are the lifters. fairly sure those lifters you have will take plenty of spring pressure.
 

·
Registered
Joined
·
13,880 Posts
Chris Straub gave me the option of 18cc domes or 3cc flat top. The flat tops are 300 dollars cheaper. The domes give me around 10.7 compression and the flat tops around 9.8 he said. Should I pay the extra and get domes or get the flat tops. I was thinking i could get my heads milled to boost the compression a little. What do you guys reccomed?
Based on a 110cc head, 4.31bore, 4.25 stroke, 4.370 x .039 head gasket, 18cc pistons:

I'm coming up with 11:1 zero deck, 10.5:1 with the pistons .020 below 0 deck

with -3 flat-tops, 9.2:1 zero deck, 8.97:1 with -.020 deck height.

Pretty much the same dilema I had when building my motor - either 11:1 or 9 something. You need to figure out your deck height. 11:1 is pushing it for a street motor IMO.
 

·
Registered
Joined
·
116 Posts
Discussion Starter #14
Im using a fel pro 1017-2 head gasket which is .051 thick that how i got the calculated 10.7 and 9.7, do you guys think the 10.7 is too much or should i use the the flat tops and mill the heads a little
 

·
Registered
Joined
·
38 Posts
I think what I would do is shoot for a smaller cc dome and get that piston closer to the deck!! I would shoot for .005 or .010 in the hole with a .040 gasket. This will increase the quench and allow you to run higher static compression. This sounds very close to the build I am doing right now excepat I am using 336781 ovals, and its going in an 84 chevy p/u. Good luck! Should be fun
 
1 - 15 of 15 Posts
Top