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Author Topic: 360 swap exhaust problems  (Read 7701 times)

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Offline rubberducky1774

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360 swap exhaust problems
« on: March 20, 2012, 11:00:26 PM »
how did you route the passenger side exhaust?  mine is hitting the frame rail and cant find any shorty headers

68AMXGOPAC

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Re: 360 swap exhaust problems
« Reply #1 on: March 21, 2012, 08:59:23 AM »
What year 360 are you useing ? I had a set of shorties on my 95 Dodge ram with a 360.......I know it may not be the same as what your application is, but just tossing it out there.

Online eaglefreek

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Re: 360 swap exhaust problems
« Reply #2 on: March 21, 2012, 09:24:08 AM »
What year 360 are you useing ? I had a set of shorties on my 95 Dodge ram with a 360.......I know it may not be the same as what your application is, but just tossing it out there.

I would assume he is installing an AMC 360 not a Chrysler 360. Two totally different engines.
1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear.
1981 AMC Eagle Wagon As Seen On TV  Lost In Transmission


 

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Offline captspillane

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Re: 360 swap exhaust problems
« Reply #3 on: March 21, 2012, 12:13:55 PM »
The offset for the 258 is about 1-1/2" to the passenger side. This won't work with the 360. You need to decrease the offset to about 3/4". You'll have to cut the old engine mounts off the crossmember and make new ones. You need to bolt the engine to the existing transmission and then slide it sideways to know where to put the mounts on the crossmember.

Most people shave the strut rod bracket a little bit as well. This picture is from a V8 conversion sold on ebay. Mine will have a similar proximity to the bracket. Instead of grinding at it, I'd like to take the hump out of the bracket and make it flush against the subframe, with a notch in that lip in the way, but that would be alot of cutting and welding for very little gain. I'll probably just shave it like this.

« Last Edit: March 21, 2012, 12:16:39 PM by captspillane »
Currently Inspected and Insured as of Jan 2013:
-1985 Eagle Station Wagon 258 T5 Stickshift
-1980 Eagle Station Wagon 258 Auto Fuel-injected with GM TBI

Minor Repairs Underway:
-1982 Eagle SX4 258 T5
-1981 Kammback 2.5L Iron Duke T5

Restoration Efforts Near Completion:
-1982 SX4- 401 NV3550
-1983 SX4- 4.5 MPI NSG370 (6 Speed)

Restoration Efforts Underway:
-1985 SW- 4.0 MPI AX15
-1982 SX4- 4.0 AW4
-1981 SX4- SD33T NV4500 (Turbodiesel 5 speed)

Future Rescue Efforts- '85 Maroon SW, '87 Limited SW, '84 Limited SW, '87 4 door Sedan, '81 2 door Sedan, '88 White SW, '77 4 door Hornet, '74 2 door Hornet, '79 Spirit AMX, '81 Kammback.

RIP- Red '81 SX4, '84 4dr Sedan, '84 SW, '81 SW, '80 Spirit, '83 SW, '83 4dr Sedan

68AMXGOPAC

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Re: 360 swap exhaust problems
« Reply #4 on: March 21, 2012, 02:08:32 PM »
What year 360 are you useing ? I had a set of shorties on my 95 Dodge ram with a 360.......I know it may not be the same as what your application is, but just tossing it out there.

I would assume he is installing an AMC 360 not a Chrysler 360. Two totally different engines.
Yeah , I would be so corrected,lol, didn't even give that any thought. Thanks.

Offline carnuck

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Re: 360 swap exhaust problems
« Reply #5 on: March 21, 2012, 08:09:01 PM »
I planned to run mine forwards (with a LH manifold) and then back.
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline rubberducky1774

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Re: 360 swap exhaust problems
« Reply #6 on: March 23, 2012, 01:57:54 PM »
go it figured out i just cut the strut rod bracket off and made a new one

Offline rubberducky1774

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Re: 360 swap exhaust problems
« Reply #7 on: May 02, 2012, 11:35:00 PM »
im having a heck of a time trying to get an exhaust done on my eagle.  i cant figure out how to get the driverside exhaust around the drive shaft.  does anyone have any ideas on how to go about it? or happen to have a picture of how they did it?

Offline mudkicker715

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Re: 360 swap exhaust problems
« Reply #8 on: May 03, 2012, 06:37:40 AM »
Is yours still stock other than the motor. if it is it will be a pita. take it in and have it done. however i did one to my 304 eagle but its about as tall as i am. also just about the same thing is putting a 4.0 header/manifold from a jeep on a stock height eagle. to do that i used a downpipe from who knows what. it worked however.

any of these pics you want just ask.



Manitowoc WI

Offline rubberducky1774

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Re: 360 swap exhaust problems
« Reply #9 on: May 03, 2012, 10:10:36 AM »
any pictures you got would help.  I did talk to the exhaust place in town and they said about 650 it to do the exhaust because I would need cat converters even though I don't need emissions

Offline mudkicker715

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Re: 360 swap exhaust problems
« Reply #10 on: May 03, 2012, 11:27:46 AM »

 
 

thats what i have for the stroker 6 with mid 90's cherokee header type thing. i looked at my 304 powered eagle and it was all straight forward no issue as it also is sas 'ed. so i won't with that photo op especially since the ground is wet.



Manitowoc WI

Offline hypereagle

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Re: 360 swap exhaust problems
« Reply #11 on: May 04, 2012, 08:58:28 PM »
im having a heck of a time trying to get an exhaust done on my eagle.  i cant figure out how to get the driverside exhaust around the drive shaft.  does anyone have any ideas on how to go about it? or happen to have a picture of how they did it?
There are pics of what was done with my 360 in my SX4  to be found in members products.

73 AMX/Javelin, 79 Spirit, 81 SX4, 87 Comanche, 02 Grand Cherokee Ltd, 86 2dr Cherokee, 70 AMX 390 4 Spd.

Online vangremlin

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Re: 360 swap exhaust problems
« Reply #12 on: May 05, 2012, 06:17:47 PM »
thats what i have for the stroker 6 with mid 90's cherokee header type thing. i looked at my 304 powered eagle and it was all straight forward no issue as it also is sas 'ed. so i won't with that photo op especially since the ground is wet.

Mudkicker did you have to modify any of the brackets for the front drive train with this setup?  Thanks
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Offline mudkicker715

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Re: 360 swap exhaust problems
« Reply #13 on: May 05, 2012, 06:53:19 PM »
The axle side bracket is completely flat. no angles. hard to pic it. than its spaced out approiately



Manitowoc WI

Offline rubberducky1774

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Re: 360 swap exhaust problems
« Reply #14 on: May 05, 2012, 07:22:12 PM »
what size exhaust you think I should run foe the 360?  that's what will decide if I can run it by the bell housing

Offline BenM

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Re: 360 swap exhaust problems
« Reply #15 on: May 05, 2012, 09:00:26 PM »
I would use 2" and go to 2.5" after the Y where they come together, but I don't like to be showy. Plus, I don't believe I'd ever notice the difference with anything larger. I wouldn't even sweat 1.75" if I needed it to clear parts around the motor.

I don't spend a lot of time at high RPM and wide open throttle. The smaller pipes may help with off-idle torque as well.
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Offline mudkicker715

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Re: 360 swap exhaust problems
« Reply #16 on: May 05, 2012, 10:02:46 PM »
The 304 i ran 2" but as stated i had all the room i wanted.
 the stroker 6 was tight for 2". i wanted 2.25", doesn't fit.

again i only compare the mid ninety's kee manifold since it looks to be placed comparitively to the v8.



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Offline carnuck

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Re: 360 swap exhaust problems
« Reply #17 on: May 06, 2012, 05:27:34 PM »
On my Jtruck I ovalled the pipe to fit between the frame and floor so I could use the space between the frame rails for air tanks and stuff (MAN I miss my J4000!)
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline The Dark Side of Will

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Re: 360 swap exhaust problems
« Reply #18 on: December 25, 2017, 08:37:44 PM »
The offset for the 258 is about 1-1/2" to the passenger side. This won't work with the 360. You need to decrease the offset to about 3/4". You'll have to cut the old engine mounts off the crossmember and make new ones. You need to bolt the engine to the existing transmission and then slide it sideways to know where to put the mounts on the crossmember.

Most people shave the strut rod bracket a little bit as well. This picture is from a V8 conversion sold on ebay. Mine will have a similar proximity to the bracket. Instead of grinding at it, I'd like to take the hump out of the bracket and make it flush against the subframe, with a notch in that lip in the way, but that would be alot of cutting and welding for very little gain. I'll probably just shave it like this.



I will disagree with you on a technicality, BUT agree with your point.

If the 360 is centered between the mount pads on the crossmember, then it is offset to the RIGHT by 1 inch. The engine needs to be shifted left by an inch to be centered between the frame rails.

Because the AMC/Jeep inline 6 block bulges out on the right more than it does to the left, the original position of the crankshaft is centered between the frame rails.

 

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