572 Pump gas Hemi

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Jet

Jet

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Dynoed my Hemi at Best Machine.
572 BMP aluminum block
Edelbrock heads
Solid flat tappet cam
10.5 comp ratio

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Some nice numbers for it being pump gas and cross ram. Any port work done to the heads or intake?
 
MCH ported the heads and the crossram.
 
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
 
Jet said:
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
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Any other details you can share? Sound super close to mine other than yours is 24cubes bigger and I have a roller.
 
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
 
Malex said:
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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Jet said:
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
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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.
 
Great numbers guys!

What are your cam specs Malex? I haven't picked a cam out for mine yet...
 
68 HEMI GTS said:
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.
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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.

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Made hard lines for fuel. Lashed and fogged. Shipping to FL soon.

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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.
 
charger426 said:
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.
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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.
 
charger426 said:
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.
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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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