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  #21  
Old 03-03-2014, 04:58 PM
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Just say no to crack
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  #22  
Old 03-03-2014, 09:31 PM
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Quote:
Originally Posted by Ristow
didn't mean to get yer underwear knotted up......you work for edelbrock or something?

LOL, no worries It takes a lot more than someone like you to rattle my cage. As my dad use to say, "sometimes you just need to consider the source". So I do!

Yes, I do work for Edelbrock, but oh that's right you have known that for years. I didn't start this thread to promote Edelbrock in any way now did I Ristow? So again, what is your point??

So back to the subject:
I started this thread to inform Jeep people about a new header that is now being manufactured by Pertronics. They saw there was a demand for a shorty header because people are still looking for the Edelbrock shorty headers long after they were discontinued, so Pertronics stepped up with their own. Buy them or don't it doesn't really matter to me, I was just passing along some information to those who are interested.
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  #23  
Old 03-03-2014, 10:55 PM
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yep

I can tell you from experience those collectors are exactly like the Edelbrock & Both of mine split. Unless they are thicker they won't last long. There is no seat of the pants difference than stock manifolds which I had both before & after them. There may be a slight dyno difference but it's minimal. Mine was properly supported period. More support can be worse. I wasn't easy on mine but they shouldn't have been that fragile on an SUV.
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  #24  
Old 03-04-2014, 06:35 AM
Ristow Ristow is offline
 
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sheesh...i said nothing against edelbrock...well,in this thread.

merely disagreed with the statement that was used to justify the cracking of these "direct bolt on replacement" (your words) headers. what were these going for? +300.00 range?


that ain't chump change.

those headers earned the reputation they have.

btw...i agree with serehill. a rigid exhaust will crack them faster than a loose one. must be why my horrible junk 225.00$ hookers are fine after +25 thousand miles with their single hung dual exhaust i built.
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Ristows right.................again,




Quote:
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... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...

Last edited by Ristow : 03-04-2014 at 06:37 AM.
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  #25  
Old 03-04-2014, 11:16 AM
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Quote:
Originally Posted by Ristow
btw...i agree with serehill. a rigid exhaust will crack them faster than a loose one.

Who said the exhaust needs to be rigid, not me. I just said it needed to be "properly supported". Big difference! And probably a waste of time to try to explain it to you.

I do want to thank you for keeping this thread near the top, but your weak attemp at a pissing match has become very boring and repetitious. It's no wonder companies are reluctant to build new products for the AMC V8!

This has been fun, but I have more constructive things to do with my time.
See ya!
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  #26  
Old 03-04-2014, 11:29 AM
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Companies dont make parts for Amc's because there isnt a big demand like there is for the big three.
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  #27  
Old 03-04-2014, 12:10 PM
Ristow Ristow is offline
 
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pfff.....edelbrock guys.....they get their "shorties" all wadded up so easily....

it kinda "cracks" me up....
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Quote:
Originally Posted by Hankrod
Ristows right.................again,




Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.




Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!


→ Where the kids hang out...

fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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  #28  
Old 03-04-2014, 12:16 PM
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i bet it was Simon....
he's such big meanie that way...
please don't tell him i said that....
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  #29  
Old 03-04-2014, 01:14 PM
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This thread has gotten pretty fun.
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  #30  
Old 03-19-2014, 11:27 AM
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Hey, been on enforced-forum-vacation for three weeks. I love how this topic is so mellow without my aggravating presence.

Here is the link to the dyno tests done on ported stock manifolds versus Hedmans versus Edelbrock Shorties.

http://www.ifsja.org/forums/vb/showt...header s+dyno

Enjoy.

Note: There are some red headers shown in the topic. not sure what they are.
The Hedmans - mine are from 1994-1996 have dogleg ports but they are small and do not match the full head-port opening. They are also 1.625" diameter runners. long-tube to 3", flanged collectors. If SC397's hedmans were the same as mine, its amazing they make power. Maybe port-matching isn't that big a deal?

I recently read that for decent performance a header runner should be 10-20% larger than the exhaust valve diameter. On AMC 360s and 401s thats a EV diameter of1.68". So 2" runners wouldn't be a terrible thing, apparently? Some people disagree.

Maybe I'll have to finish my 2" 4-1 headers with 3.5" ball-socket collectors I've been building for 8+ years and find out.

And I have ported stock exost manifolds...1973-79...and they do seem to breath better. I just pulled them off to replace them with re-furbished Thorley- Tri-Y crack-prone headers and am redesigning the dual 2.5" exost on the green truck in my avatar. Getting close to having it done. Will post pics when the truck is drivable again.

Last edited by Tinkerjeep : 03-19-2014 at 12:06 PM.
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  #31  
Old 03-19-2014, 12:01 PM
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Quote:
Originally Posted by Ristow
the dual exhaust on my j20 has one hanger for each pipe,back behind the muffler. the hookers don't mind a bit. 25K+ miles that way.

My hedmans have been running with the same exhaust pipes behind them since 1999. I just recently replaced the plugged up, rotted out Walker Turbo mufflers with new Walker/Thrush Turbos. I have a dual short-pipes though. The only hangers on my J20 chassis are in front of the mufflers and are bolted to the big,arching boxed crossmember with rubber and steel straps. The mufflers are behind this and there is no tailpipe out of the mufflers. Haven't been any "tail-pipes" of any length (aside from some 18" turndowns for several years) since I shortened the full-length exhaust-shop-installed system in 1999.

The hedmans are about 20-years old and no cracks yet...plenty of rust though.

Last edited by Tinkerjeep : 03-19-2014 at 12:04 PM.
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  #32  
Old 03-19-2014, 12:49 PM
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Banshee....Thanks for this post. I have a couple sets of vintage Edelbrock shorties that I never have gotten around to installing. When I do install them I'll make sure I pay attention to how the rest of the exhaust system is supported. I do like the idea of a flex joint though. I'll have to think about it.
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  #33  
Old 03-19-2014, 01:54 PM
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I have edelbrock shorties with dual 2.5"s. I'll take pictures and see how my brackets are hung in about a week.
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  #34  
Old 01-31-2015, 06:21 AM
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Anyone ever buy these new type of headers and what year y pipe would be needed. Or would a custom y pipe job be in order?
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  #35  
Old 01-31-2015, 11:18 AM
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Quote:
Originally Posted by DBX11
Anyone ever buy these new type of headers and what year y pipe would be needed. Or would a custom y pipe job be in order?

That was the same question I had on the Y pipe but mine is a 72. I have not found a Y pipe online there all 74 and up.
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  #36  
Old 01-31-2015, 04:05 PM
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Mike - check the difference between your TH400 bellhousings and shifter locations between your 72 and 77 360 rigs. The 72s used a Buick NailHead bellhousing TH400 and an adapter plate between the block and tranny bell. In 1975ish that changed as AMC got their own TH400 bell-housing bolt-pattern exclusively for AMC blocks. That may be the reason.

But I'm guessing. You would be able to find the reason easier than I would since you have the rigs in your possession to physically compare.
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  #37  
Old 01-31-2015, 07:45 PM
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Yep I'll do that
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  #38  
Old 02-02-2015, 10:37 PM
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Cool

Quote:
Originally Posted by DBX11
Anyone ever buy these new type of headers and what year y pipe would be needed. Or would a custom y pipe job be in order?

They were designed to use with 74-79 J series Jeeps Y-pipe. Wagoneer, Cherokee, J10, J20.
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  #39  
Old 02-02-2015, 11:53 PM
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Quote:
Originally Posted by Tinkerjeep
Mike - check the difference between your TH400 bellhousings and shifter locations between your 72 and 77 360 rigs. The 72s used a Buick NailHead bellhousing TH400 and an adapter plate between the block and tranny bell. In 1975ish that changed as AMC got their own TH400 bell-housing bolt-pattern exclusively for AMC blocks. That may be the reason.

But I'm guessing. You would be able to find the reason easier than I would since you have the rigs in your possession to physically compare.

I don't see a adapter between the block and Trans.
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  #40  
Old 02-02-2015, 11:57 PM
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Question

May be that's why my manifolds look the same as the 77 except no air injection
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