Moparts

How much power: Stage V hemi heads and pump gas

Posted By: domingo

How much power: Stage V hemi heads and pump gas - 03/09/11 11:04 PM

How much power would you say could be made with a set of CNC ported HEMI Stage V heads, 4,5 bore block, 4,375" stroke crank?

This would be pump gas and naturally aspirated.

I also have 2,25" headers.

I dont have the heads but was thinking about the replacement stle Stage V HEMI Heads. I know they make some other more serious heads but then you have ti use custom headers and more expensive rockers I think which would go beyond my budget...
Posted By: HEMIFRED

Re: How much power: Stage V hemi heads and pump gas - 03/09/11 11:48 PM

just a guess 700?
Posted By: hemigod426

Re: How much power: Stage V hemi heads and pump gas - 03/09/11 11:50 PM

what kind of car is it going in stock looking show car?,race car?prostreet? how fast do you want to go?
Posted By: domingo

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 12:00 AM

into this one. ALL OUT RACE.

67 all steel save for the hood which is glass with a 68 SS A body scoop.

gutted interior, lexan save for the rear winow.

Stock chassis, still has stock inner fenders.

ford 9" rear, cal tracks with monoleafs.

CRT transbrake 727 rollerized.
tubbed, trunk lid is still and hinged still works.

33" x 10,5" slicks.

disc brakes all around.

FULL CAGE and im also gonna make a funny car cage in it, for safety's sake.

Still I want pump gas because racing gas is a hassle to get down here....aviation gas is all we got and it is a pain to get it.....not worth bothering.

Attached picture 6520919-051(2).JPG
Posted By: Bob_Coomer

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 12:02 AM

Its all in the heads. Id say 700-750 is easy to obtain. Get the heads to flow 425-450cfm and it will run like a raped ape.
Posted By: PUNK

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 12:06 AM

I built two almost identical 511" HEMIs at the same time for two different guys. They both had BOX STOCK Stage V engineering standard port location heads and they were both pump gassers. One was FAST Fuel injected and the other was a two four barrel carb deal. Both used the stage V dual quad manifold as well and they both made basically the same power on the dyno at around 720. They both had very mild camshafts with around 248 @ .050 duration and .650 or so lift.
Posted By: 572charger

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 01:37 PM

my 606 cuin hemi with semi ported stage Vs [flow 450 at 700 lift] pumpgas motor 11.7 to 1 comp with a 282/291 at.050 720 /690 lift comp roller, is makin 850 to 900 hp based on a et of 9.60s at 142 mph at 3910 lbs with me in it my heads were cnc ported by raybarton they called it a street port put my motor in your car it should go 8.90s with out a problem !!!! NICE CAR !!!
Posted By: domingo

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 02:41 PM

Thanks!!!!

I have to start saving my pennies for this build!
Posted By: an8sec70cuda

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 02:42 PM

The Stage V replacement heads when CNC ported by MCH are a little better than my MP heads (also CNC'd by MCH) and I'm making over 800 hp on pump gas. I do have a 4.5" stroke though.
Posted By: 572DartPost

Re: How much power: Stage V hemi heads and pump gas - 03/10/11 10:07 PM

On 91 octane we made over 900 hp and still climbing at only 6500 rpm with street replacement stage v heads by MCH, a used super stock intake, two old 770 holleys, and a street roller cam in a 572.
Posted By: domingo

Re: How much power: Stage V hemi heads and pump gas - 03/11/11 12:50 AM

Quote:

On 91 octane we made over 900 hp and still climbing at only 6500 rpm with street replacement stage v heads by MCH, a used super stock intake, two old 770 holleys, and a street roller cam in a 572.



spill the beans!
Posted By: rowin4

Re: How much power: Stage V hemi heads and pump gas - 03/11/11 01:52 AM

I'd like to know the cam spec.'s
Posted By: 572DartPost

Re: How much power: Stage V hemi heads and pump gas - 03/11/11 04:00 AM

Cam is solid roller around 275 at 50 and .700 lift. Used 2 1/8 headers on the dyno, the 2 1/4 on it now would have probably made more, so would bigger carbs. Carbs aren't on correctly in pic.

Posted By: rowin4

Re: How much power: Stage V hemi heads and pump gas - 03/11/11 04:18 AM

Lookin good what you putting it in? and thanks for the cam info

Posted By: torkrules

Re: How much power: Stage V hemi heads and pump gas - 03/12/11 11:14 PM

Quote:

How much power would you say could be made with a set of CNC ported HEMI Stage V heads, 4,5 bore block, 4,375" stroke crank?

This would be pump gas and naturally aspirated.

I also have 2,25" headers.

I dont have the heads but was thinking about the replacement stle Stage V HEMI Heads. I know they make some other more serious heads but then you have ti use custom headers and more expensive rockers I think which would go beyond my budget...



With a very mild roller (under 600 lift), 10.5 comp, Stage V intake with two 650 carbs, and CNC ported Stage V heads, I got 658 at 6500rpm. 472CID
© 2024 Moparts Forums