Quote:
Originally Posted by Patric Fox
NICE!! Do you expect a performance gain?
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As Garrett mentioned, I have access to a set of 1 7/8" Hedmans, 2" Hookers, my old REF's (same tube size as the new Monde Headers) and then of course the new ones. As long as I can get them all to fit the dyno, I'll give them a try.
I've always thought a swoopy header was the way to go and I see that Mark @ Performance Welding seems to have the same theory. From what I've seen of Marks work, he also builds a nice header.
My older engines were dyno'd with Jeep fenderwell headers as that was all that would fit on the antique Stuska dyno frame we use. The $79 1 3/4" fenderwells made surprisingly good HP.
Then we built some exhaust flange adapters about 3" wide so the REF chassis headers would clear the dyno frame and it still made good power. Hopefully, these new headers will clear the dyno frame. Unfortunately, the adapters will most likely be needed on the other headers.
In my discussions with Garrett I stated I thought something short of fenderwell headers would be best and I saw his work on his own headers and was very much impressed that he came up with a forming tool to replicate that dog-leg in the primary header tubes to a level I've not seen in an AMC header. My custom REF headers were good at the port, just not this good. And I had Ed headers before the REF's and they had an OK port but again, not as good as the REF's. And I'm sure you know the store bought shelf headers look like somebody crammed a round pipe into a dog-leg flange and beat it in and filled the rest with a stick welder.
Here is what I'm talking about with Garrett's work:
Contact Garrett here with a PM and see if he can build a set for the narrower engine bay of the pre-1970 AMC's using a local car. I'm sure he can find one. You know, they're everywhere, just like Camaro's with one on every corner!