Forwarded below for Mark, who is having some home e-mail problems. I know for sure the 91-98 exhaust won't work on an Eagle. It likely won't work on a Hornet et. al. either, but if it works on an American it should work on the big AMCs, Javelin, and 69 and older AMCs... except the 58-63 American, which won't mount a 232-4.0L without MAJOR surgery anyway! -- Frank Swygert Publisher, "American Independent Magazine" (AIM) For all AMC enthusiasts http://farna.home.att.net/AIM.html (free download available!) -------------- Forwarded Message: -------------- From: "Mark Price" <Mark.Price@xxxxxxxxxxxx> To: <farna@xxxxxxx> Subject: Re: Intake Manifold upgrade for the AMC 6 early - & More Headers Date: Tue, 4 Jan 2005 13:32:40 +0000 > I have the three into two into one 91-98 on mine. I forgot to look and see if I > had the pic of the completed modified version. It was severely cracked at the > junction of the two into one at the donut area. I cut it all off leaving the two > pipes side by side then made a cone and terminated it directly into 2 ½" exhaust > tubing. I made an S series of bends down to just below/behind the clutch fork > and terminated it with a 2 ½" 3 bolt header flange with a dead soft aluminum > gasket. I ran it that way for 1,000 plus miles, works great. I may have been > over zealous in the 2 ½" pipe, 2 1/4" may have been better for low end flow, but > Oh well, I'm not reworking it now! After reading the posts about cracking, I > plan on looking into adding a rear support at the bellhousing. > Originally the 2 ½" S bend was clamped on, but when adding the EFI I had it > apart and MIG welded it on. I also added an Oxygen sensor bung in the open area > after the last two pipes joined. > Anyone using a 4.0 would be well served by this type exhaust conversion. > Cracked 91-98 manifolds are easy to pick up cheap or free and make an excellent > base for this. We talked about this a few years back and questimated 9 > horsepower gain over an non Ho 87-90 pipe, but that's just a guess, I probably > hurt torque with the 2 ½" pipe! But with the light American body and a 5 speed, > what do I care!!!! > I also have a set of the 99+ cast iron manifolds! I was going to go with dual > exhaust just for the WOW factor, but decided the running factor is more > important!!! > I'm also sure a non modified 91-98 will fit. You will need a custom front > pipe though as a Jeep pipe will hang too low. You may be able to modify a Jeep > pipe to work. > I'll try and remember the PICS tonight! > > Mark > > Mark E. Price > Academic Lab Manager > WVU Creative Arts Center > PO Box 6111 > Morgantown, WV 26506-6111 > 304-293-4841 ext.3105 > Fax: 304.293.3550 > > > > >>> <farna@xxxxxxx> 1/4/05 8:01:09 AM >>> > > Before I post, let's figure out which one you have! The 87-90 Renix slopes from > #1 back to about #5 cylinder, #6 curves forward. The 91-98 is actually a three > into two into one design. Looks like you could cut the connector off and have a > dual exhaust. 99+ (maybe 2000+) have twin cast iron "headers" like a Volvo. > > -- > Frank Swygert > Publisher, "American Independent > Magazine" (AIM) > For all AMC enthusiasts > http://farna.home.att.net/AIM.html > (free download available!) > > > -------------- Original message ---------------------- > From: "Mark Price" <Mark.Price@xxxxxxxxxxxx> > > Frank, > > I'm at work and having trouble getting my home email up, So post this > > if you can. > > I have a "curvy" HO 4.0L exhaust manifold on my now running American. > > I custom made the outlet on mine because it was a cracked takeoff and > > "what the He!!" > > A non modified one will work though. > > A custom downpipe will be needed. > > Somewhere at home I think I have a few pictures of the modified piece. > > I'll look for them if I remember! > > > > > > > > Mark E. Price > > Academic Lab Manager > > WVU Creative Arts Center > > PO Box 6111 > > Morgantown, WV 26506-6111 > > 304-293-4841 ext.3105 > > Fax: 304.293.3550 > > > > > > > > >