TFS A460 exhaust flange ??

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TFS A460 exhaust flange ??

Post  HorsinAround on December 5th 2016, 1:28 pm

I am confused. I have read that the A460 exhaust flange is not the same as a bbc but that the pattern is. meaning the pattern is the same but the bolt spacing is different. The TFS page says this "..... Standard big block Chevy exhaust flange bolt pattern....") So will a standard BBC flange work on new A460's?
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Re: TFS A460 exhaust flange ??

Post  cool40 on December 5th 2016, 2:25 pm

Yes Smile
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Re: TFS A460 exhaust flange ??

Post  rmcomprandy on December 5th 2016, 8:33 pm

HorsinAround wrote:I am confused. I have read that the A460 exhaust flange is not the same as a bbc but that the pattern is. meaning the pattern is the same but the bolt spacing is different. The TFS page says this "..... Standard big block Chevy exhaust flange bolt pattern....") So will a standard BBC flange work on new A460's?

A460 refers to a type of big block Ford cylinder head and there are at least 4 different head brands in the marketplace which can be described as "A460".

The original MOTORSPORT "A460" heads are a slightly wider Chevy pattern, (4.9" between each cylinder exhaust port), because all the exhaust ports are the same.

The EX514 "A460" heads are like those Motorsport heads on the exhaust side.

The IDT "A460" heads use all the same exhaust port exits, (4.9" apart), but, the bolt pattern is squeezed together slightly so they use a Chevrolet 4.84" separation exhaust BOLT pattern.

The TFS "A460" heads use all 4 slightly different configuration exhaust ports, (exhaust valves being 4.9" apart but port exits being 4.84" apart), so the exhaust pattern on those IS the Chevrolet pattern.


Last edited by rmcomprandy on December 5th 2016, 8:48 pm; edited 1 time in total

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Re: TFS A460 exhaust flange ??

Post  HorsinAround on December 5th 2016, 8:47 pm

Thanks Randy. I should have clarified that I was looking at the TFS A460 website.

Who makes the best flanges for the TFS a460?
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Re: TFS A460 exhaust flange ??

Post  rmcomprandy on December 5th 2016, 8:51 pm

HorsinAround wrote:Thanks Randy. I should have clarified that I was looking at the TFS A460 website.

Who makes the best flanges for the TFS a460?

Every big block Chevrolet flange I have used needs to be clearanced for A460 spark plug access.

I think the ones from the "Fab Shop" don't.

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Re: TFS A460 exhaust flange ??

Post  HELI-ARC on December 6th 2016, 8:20 am

If you are still in need we have A460 flanges in steel or stainless, one piece or individual.
They are custom made for these heads, BBC are close but need some love to be right. Let me know what you would like and a zip code and I will get you a price.

Thanks

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Re: TFS A460 exhaust flange ??

Post  fastashley on December 18th 2016, 3:12 pm

Welded up a set from Mad Dog, but then cut out the sections between the ports because plug access was nearly impossible

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Re: TFS A460 exhaust flange ??

Post  norm on December 18th 2016, 6:01 pm

Hmmm. My maddogs were assembled by them but plug access is fine.
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Re: TFS A460 exhaust flange ??

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