Jeep Wrangler Forum

Jeep Wrangler Forum (http://www.wranglerforum.com/)
-   TJ General Discussion Forum (http://www.wranglerforum.com/f282/)
-   -   Chevy V8 swap exhaust (http://www.wranglerforum.com/f282/chevy-v8-swap-exhaust-226687.html)

kencraft 03-10-2013 08:31 PM

Chevy V8 swap exhaust
 
Hi all, I am swapping in a 350 carbed engin into my tj and was wondering if anybody has a good solution for manifolds or headers, other than the high dollar conversion headers. I am using Advance Adapters mounts. has anyone tried the mid length truck or Camaro headers????

thedaringmove 03-10-2013 11:01 PM

I'd be interested in a response too. I want to do this swap someday

kencraft 04-03-2013 08:43 PM

350 swap
 
Well ordered the headers and the 4cyl is coming out Saturday. new ball joints and then in with the HORSE POWER.

krisbman 04-03-2013 09:07 PM

Quote:

Originally Posted by kencraft (Post 3591360)
Well ordered the headers and the 4cyl is coming out Saturday. new ball joints and then in with the HORSE POWER.

Whats been done to the motor??? What 350 is it?

kencraft 05-06-2013 09:14 PM

kris its a carbed 350 out of a 70 corvette (actually was a warranty replacement for my vet) totally stock inners just has alum intake,headers, Edlebrock carb HEI gm ignition, headers, and some pretty stuff on it.

kencraft 05-06-2013 09:15 PM

actually got it running, just have to patch tunnel mod and needing a clutch master cylinder, then to the exhaust shop.

krisbman 05-06-2013 09:23 PM

Quote:

Originally Posted by kencraft (Post 3727177)
kris its a carbed 350 out of a 70 corvette (actually was a warranty replacement for my vet) totally stock inners just has alum intake,headers, Edlebrock carb HEI gm ignition, headers, and some pretty stuff on it.

Nice, so its still a fairly high compression motor, probably 9.5 to 1. Probably a forged crank and GM pink rods.

krisbman 05-06-2013 09:25 PM

Quote:

Originally Posted by kencraft (Post 3727185)
actually got it running, just have to patch tunnel mod and needing a clutch master cylinder, then to the exhaust shop.

If yer gonna be doing any crawling i would suggest upgrading the carb to a new bolt on EFI unit.

ScottyTJ 07-31-2014 12:38 PM

So.....any ideas on this? I have a build in progress also, will be putting in a 305 or a 350 Chevy, probably headers, and am wondering what to do with exhaust. It doesn't have to be excessively loud or anything, but I don't want it so restrictive that it robs power. (Although, admittedly, it will probably have way more power than it actually needs.....) And of course it would be nice if it sounded like a V8.

fattirewilly 07-31-2014 01:50 PM

Look into van manifolds from a V-8 Chevy van.

krisbman 07-31-2014 07:48 PM

Quote:

Originally Posted by ScottyTJ (Post 12336569)
So.....any ideas on this? I have a build in progress also, will be putting in a 305 or a 350 Chevy, probably headers, and am wondering what to do with exhaust. It doesn't have to be excessively loud or anything, but I don't want it so restrictive that it robs power. (Although, admittedly, it will probably have way more power than it actually needs.....) And of course it would be nice if it sounded like a V8.

Dont bother with manifolds. Get a set of shorty headers from hooker. Also if your gonna put in a small block dont waste your time with a 305. Takes just as much to put in a 350 as it does a 305.

fattirewilly 07-31-2014 07:58 PM

Quote:

Originally Posted by krisbman (Post 12345897)

Dont bother with manifolds. Get a set of shorty headers from hooker. Also if your gonna put in a small block dont waste your time with a 305. Takes just as much to put in a 350 as it does a 305.

How much is left on the table with manifolds vs shorties?

krisbman 07-31-2014 08:06 PM

Quote:

Originally Posted by fattirewilly (Post 12346169)
How much is left on the table with manifolds vs shorties?

Idk. Headers probly $200

fattirewilly 07-31-2014 08:12 PM

Quote:

Originally Posted by krisbman (Post 12346353)
Idk. Headers probly $200

Was thinking hp and/or torque left on table.

krisbman 07-31-2014 09:00 PM

Quote:

Originally Posted by fattirewilly (Post 12346537)
Was thinking hp and/or torque left on table.

Always gonna have more with headers. Probly an easy 15 -20 hp id say.

fattirewilly 08-01-2014 10:28 PM

Quote:

Originally Posted by krisbman (Post 12347913)

Always gonna have more with headers. Probly an easy 15 -20 hp id say.

Sounds reasonable for an older carbed 350. I've read that the newer 1999+ engines don't respond as well to shorties because the manifold is better, the vette manifold in particular. The non-vette manifolds are leaving about 5-10 tops. I'll put some links up when I get away from this phone.

I have manifolds on l92 heads and ls7 block btw. I've been puzzeled as to why a credit card (not mine) build at a very good builder went manifold instead of headers. Was mentioned by PO (RIP) that low end torque was a goal.

krisbman 08-02-2014 12:30 AM

Quote:

Originally Posted by fattirewilly (Post 12376617)
Sounds reasonable for an older carbed 350. I've read that the newer 1999+ engines don't respond as well to shorties because the manifold is better, the vette manifold in particular. The non-vette manifolds are leaving about 5-10 tops. I'll put some links up when I get away from this phone. I have manifolds on l92 heads and ls7 block btw. I've been puzzeled as to why a credit card (not mine) build at a very good builder went manifold instead of headers. Was mentioned by PO (RIP) that low end torque was a goal.

They are more along the lines of headers. Tubular manifolds like on our Tj's. Cast iron manifolds are a thing of the past. There are alot of myths about torque Vs hp. Ive seen single plane intakes produce more torque than dual planes.


All times are GMT -5. The time now is 06:09 AM.