572 Pump gas Hemi
- Thread starter Jet
- Start date
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Rat Bastid
Dunamis Metron
Very cool. I love big HP a pump gas builds.
68 HEMI GTS
Well-Known Member
Nice, I seen that on Facebook. Did modern cnc your heads? Also what’s the cam specs. I was going to dyno mine at Holbrook’s today but pushed it do to the all day snow…. Nice build!
Yes, MCH cnc’d the heads. Flow sheet was very close to yours that you posted. The cam is 280 duration 650 lift solid flat tappet. Cam is nitrided and using Barton tool steel lifters.
I have followed both of your builds. I appreciate the sharing of info
I have followed both of your builds. I appreciate the sharing of info
68 HEMI GTS
Well-Known Member
I’m watching with interest and waiting for your dyno numbers 68. My 572 is real close to you guys so I’ll throw my dyno sheet into the works too. I’m 11-1. Victors and a solid roller. My dyno work was done with a single Dominator and Barton intake on 91 octane.
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Molnar crank and rods. Diamond pistons. Milodon gear drive. I was shooting for 11:1 but I had to go with a Felpro .59 head gasket because my Cometic .40 didn’t mate well with the BMP alum and eddy heads. Chambers were a little big even with a clean up cut . Oil pressure is a little high could have backed it down a little and pick up a couple HPs. Ended up with 33 degrees advance timing
68 HEMI GTS
Well-Known Member
Mine should be interesting. I know best machines dyno is conservative. They will flat out tell you that
Going off Jets combo, (810/572)x548=776hp
Off Malex (873/572)x548=836hp.
So my 548 will probably fall 776-836 range. I’d be happy to see 800… lol. Feels about right.
68 HEMI GTS
Well-Known Member
I was pretty close, had some issues with the cross ram so I ran it with an unported barton single plane. It’s got more left.
It’s a crane solid roller, out of their book. Part No#688301.
68 HEMI GTS
Well-Known Member
charger426
Well-Known Member
Any reason for going with a solid flat vs roller? Would assume someone in deep enough for a 572 HEMI wouldnt be worried about the price difference.
I know one thing. If I had an extra solid cam & lifter set up that was good and I liked it, sure as hell I’d be using it.
With my rocker arms I didn’t need push rod oiling. Lower spring pressures. Less maintenance. Still meet my performance goal. Barton and Best machine both said for a street engine it’s the better way to go.
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