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-   Early V8 (1932-53) (https://www.fordbarn.com/forum/forumdisplay.php?f=4)
-   -   Flathead FAQs (https://www.fordbarn.com/forum/showthread.php?t=282297)

Yoyodyne 06-10-2020 09:54 AM
Re: Flathead FAQs
 

Quote:
Originally Posted by 51504bat (Post 1897414)
Several years ago when they held the TROG race in California there was a 337 flathead powered entry. It was high class looking. Don't know how well it ran since the race pretty much got rained out but it was an impressive looking machine. I did a search trying to find something about it but Mr. Google let me down. Or should I say maybe I just didn't ask the right questions.
The blue single seat car? I saw it in NJ, yes very pretty, ran good but it was hard to tell which cars were fast on the sand, a blown V8 usually outran a 4 banger by only about 2 carlengths there.

Yoyodyne 06-10-2020 10:19 AM
Re: Flathead FAQs
 

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dumb person 06-11-2020 03:46 AM
Re: Flathead FAQs
 

Quote:
Originally Posted by Rudolph (Post 1897503)
I did the drinking the antifreeze trick the other day and I ate pizza witch was strapped to the cylinder heads to warm it
Mountain dew.

Ol' Ron 06-11-2020 06:13 AM
Re: Flathead FAQs
 

The flathead actually has 4 exhaust ports on each side, because one is used twice at different parts of the engine cycle. Now this could benefit exhaust tuning by creating a vacuum in the exhaust header. The firing order fires the end cylinders on the first revolution of the cycle and the center ports on the next revolution. Thus the center port has two power pulses for each engine cycle. Maybe we could take advantage of this in a new header design. Think fellows, think

Ol' Ron 06-11-2020 02:24 PM
Re: Flathead FAQs
 

Mtt

Pete 06-11-2020 03:02 PM
Re: Flathead FAQs
 

Quote:
Originally Posted by Ol' Ron (Post 1897923)
The flathead actually has 4 exhaust ports on each side, because one is used twice at different parts of the engine cycle. Now this could benefit exhaust tuning by creating a vacuum in the exhaust header. The firing order fires the end cylinders on the first revolution of the cycle and the center ports on the next revolution. Thus the center port has two power pulses for each engine cycle. Maybe we could take advantage of this in a new header design. Think fellows, think
Back in the 50's when I had unlimited free access to a dyno, I tried 3 different exhaust systems on a 315 ci flathead circle track engine.

1- Standard 1.75 dia. 3 pipe swept back street type headers.
2- Home made 2 inch dia "W" type header with baffle in center at big flange
and reverse flow dams at the ports.
3 - 2 inch zoomies with reverse flow dams.

The zoomies made the most power but we could not run them on the track.
We did run them at Bonneville though.

Ol' Ron 06-11-2020 04:20 PM
Re: Flathead FAQs
 

I was thinking I'd run the end ports into the collector and stop-. Then run the center in about a foot, the extra pulses from ther center port might draw more from the end ports.
I probably won't work but I thing the sound of a flathead might be caused by this.????

Pete 06-11-2020 04:51 PM
Re: Flathead FAQs
 

Quote:
Originally Posted by Ol' Ron (Post 1898136)
I was thinking I'd run the end ports into the collector and stop-. Then run the center in about a foot, the extra pulses from ther center port might draw more from the end ports.
It probably won't work but I think the sound of a flathead might be caused by this.????
Almost all improvments are made by testing.
Try it.

Ol' Ron 06-11-2020 10:35 PM
Re: Flathead FAQs
 

I widh I had all these ideas when I had a dyno???

Rudolph 06-12-2020 07:51 PM
Re: Flathead FAQs
 

A wile back everyone was selling those port dividers for the centre port but I think the restriction was worse than the cross contamination,

A friend has a very nice block someone wrecked by grinding out the centre port and made it so thin it went into the water jacket

V8COOPMAN 06-12-2020 08:16 PM
Re: Flathead FAQs
 

Quote:
Originally Posted by Rudolph (Post 1898506)
A wile back everyone was selling those port dividers for the centre port but I think the restriction was worse than the cross contamination,

A friend has a very nice block someone wrecked by grinding out the centre port and made it so thin it went into the water jacket

"Drug store hot rodders"! One of those brainiac know-it-alls armed with a magazine article, or better yet....a J.C. Whitney add claiming that those dividers will easily add a hundred horsepower. "Grind a smidge, install, and be the KING of your local drag strip!"
DD

Pete 06-12-2020 08:34 PM
Re: Flathead FAQs
 

Quote:
Originally Posted by Rudolph (Post 1898506)
A wile back everyone was selling those port dividers for the centre port but I think the restriction was worse than the cross contamination.
Yea, those store bought port dividers were the biggest hoax to ever come out.
All you need is a piece of Inconel 1"x1"x1/8". (Race engines only)


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