D3 NASCAR head

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Re: D3 NASCAR head

Post by blykins » Tue Jun 19, 2018 7:13 pm

Steve, just think how much power you could have made with it smaller.

You need to ditch the idea that you need massive port volumes to make horsepower. You're going the wrong direction. "Let's make it bigger" is 1960's Ford engineering thinking and is by no means optimal.

I'm looking for a picture of some of my Tunnel Port FE heads. In factory form they flow around 300 cfm with a port big enough to put your fist in and back up at .600". By raising the floor a 1/4" and shaping the short side, they flow about 380 with a smaller volume and will keep going up until about .800".

BTW, I'm not saying that you don't have to pick the volume relative to the combination, but a 260cc head is not necessary for 800 hp.

Swampbuggy, the distance from the floor of the port to the deck surface is exactly the same as a 225cc CHI 3V head out of the box.
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Re: D3 NASCAR head

Post by Steve.k » Tue Jun 19, 2018 7:30 pm

Brent I know 260 is not necessary for 800 hp. However the a3 for example could have cam swap drop some lower rpm tq and put the rest on top for a little extra kick. Or could open up some more and bring the power range up to utilize the cubes. Or could buy a whole new set like the d3 so that down the road can keep moving forward. The cj heads may have improved with raised floor but that motor put the hurt on alot of bigger A headed motors that have all that raised floor work done.

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Re: D3 NASCAR head

Post by blykins » Tue Jun 19, 2018 7:40 pm

Those A headed motors could have had awesome heads but something else in the combination was way wrong. Or, you found a parts selection that just worked really well. It's all about the combination.

I believe the camshaft in your A3 headed engine was wrong. You don't need to pull it higher to make more horsepower, or even lose torque. I think you just need a different cam.

I guess what I'm trying to say is, don't get hung up on numbers, especially "cc's".
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Re: D3 NASCAR head

Post by swampbuggy » Tue Jun 19, 2018 9:11 pm

Brent you going to have to be more specific I'm a Chevy guy laughing out loud I don't study the Ford stuff like you do laughing out loud give it to me in inches. Mark H

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Re: D3 NASCAR head

Post by blykins » Wed Jun 20, 2018 5:53 am

swampbuggy wrote:
Tue Jun 19, 2018 9:11 pm
Brent you going to have to be more specific I'm a Chevy guy laughing out loud I don't study the Ford stuff like you do laughing out loud give it to me in inches. Mark H
I don't have any 3V heads in here right now, only CHI 2V and 4V. If I get a chance, I'll measure an intake gasket for you.
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Re: D3 NASCAR head

Post by Warp Speed » Wed Jun 20, 2018 6:57 am

af2 wrote:
Tue Jun 19, 2018 6:20 pm
Warp Speed wrote:
Tue Jun 19, 2018 1:21 pm
Small ports are for guys that can't afford proper valve motions! Hahaha :D
How do you speed up a sewer pipe?
By using proper valve events!

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Re: D3 NASCAR head

Post by CamKing » Wed Jun 20, 2018 11:57 am

Warp Speed wrote:
Wed Jun 20, 2018 6:57 am
af2 wrote:
Tue Jun 19, 2018 6:20 pm
Warp Speed wrote:
Tue Jun 19, 2018 1:21 pm
Small ports are for guys that can't afford proper valve motions! Hahaha :D
How do you speed up a sewer pipe?
By using proper valve events!
Yep, just look at the -12 heads we ran on the 410" sprint cars. Those ports were huge for the RPM they turned.
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Re: D3 NASCAR head

Post by swampbuggy » Wed Jun 20, 2018 12:11 pm

Mike...do you remember the CSA or MCSA, or the C.C. 's , and peak RPM ? Mark H.

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Re: D3 NASCAR head

Post by CamKing » Wed Jun 20, 2018 12:16 pm

swampbuggy wrote:
Wed Jun 20, 2018 12:11 pm
Mike...do you remember the CSA or MCSA, or the C.C. 's , and peak RPM ? Mark H.
288cc
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Re: D3 NASCAR head

Post by swampbuggy » Wed Jun 20, 2018 12:34 pm

Mike was that a 15-degree head I'm guessing 72 to 7800 :?:

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Re: D3 NASCAR head

Post by Steve.k » Wed Jun 20, 2018 4:33 pm

swampbuggy wrote:
Wed Jun 20, 2018 12:34 pm
Mike was that a 15-degree head I'm guessing 72 to 7800 :?:
http://www.cferacing.com/?pid=21 Pretty healthy flow and cc on these chevy heads.

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Re: D3 NASCAR head

Post by swampbuggy » Thu Jun 21, 2018 2:20 pm

FR-9. NASCAR. FORD. CYLINDER. HEAD, That. One should do it :wink:

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Re: D3 NASCAR head

Post by Steve.k » Thu Jun 21, 2018 2:32 pm

Swampbuggy i like the canted valve ford head these boys make. Wow. Good friend of built 430 inch chevy with those heads above. 880hp single carb. For small block dragster class.

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Re: D3 NASCAR head

Post by swampbuggy » Thu Jun 21, 2018 5:05 pm

Do you remember how big the carburetor was Steve

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Re: D3 NASCAR head

Post by Steve.k » Thu Jun 21, 2018 6:23 pm

I talked to him this morning. He ran two combos in hogan sheetmetal. Two 950 quickfuels for certain races. But usually single 1150.He working on another combo now to kick it over 900.fwiw he also said 288cc like mike! Im seeing a pattern with this cc thing!?? #-o

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