89 YJ 350 swap ??? - Pirate4x4.Com : 4x4 and Off-Road Forum

syd45 · 10-14-2007, 06:58 AM

My YJ had a 6cly carb and I want to put a 350 carb in it. I know this will eliminate a lot of the wiring, but what do I need to keep. The electronic ignition control unit i think I can just bypass right? If so, what do I need to crank the engine? I have no Idea about what Im doing. Thanks for the help.

Ryalt · 10-14-2007, 11:55 AM

First search, there are a lot of other people who have done the same/similar stuff.

But I'd worry mostly about your axles, transmission and all that being able to take the power of a 350. Changing the engine isn't the only thing you have to do for that swap.

jpfrk2001 · 10-14-2007, 05:45 PM

Quote:

Originally Posted by syd45

My YJ had a 6cly carb and I want to put a 350 carb in it. I know this will eliminate a lot of the wiring, but what do I need to keep. The electronic ignition control unit i think I can just bypass right? If so, what do I need to crank the engine? I have no Idea about what Im doing. Thanks for the help.

First you need to look into your state laws governing smog legal issues and stuff.

Second: go buy a chilton's book so you have the diagrams of your engine set up. This will tell you what you can bypass or not. You might want to more searching on this mod also. I never seen or done this. I have heard of it being done.

Good luck

ld50 · 10-14-2007, 05:56 PM

Why not just buy a tbi 350, they are cheap and the wiring is not that difficult. The extra trouble it takes to install it will be less than the troubles you have with the carb in the future.

syd45 · 10-14-2007, 10:32 PM

Quote:

Originally Posted by Ryalt

First search, there are a lot of other people who have done the same/similar stuff.

But I'd worry mostly about your axles, transmission and all that being able to take the power of a 350. Changing the engine isn't the only thing you have to do for that swap.

8.8 going in rear.HPd30 will hold up fine for now.Th400 /stak4x4 t-case.Im OK just need to wire the engine.

Quote:

Originally Posted by jpfrk2001

First you need to look into your state laws governing smog legal issues and stuff.

Second: go buy a chilton's book so you have the diagrams of your engine set up. This will tell you what you can bypass or not. You might want to more searching on this mod also. I never seen or done this. I have heard of it being done.
Do not have to go through inspection. I have searched, but no one has told me how to wire this up.

Good luck

Quote:

Originally Posted by ld50

Why not just buy a tbi 350, they are cheap and the wiring is not that difficult. The extra trouble it takes to install it will be less than the troubles you have with the carb in the future.

I allready have engine and holley truck avenger.

yjmaniac · 10-18-2007, 05:26 AM

sbc carb wiring is easy, couple wires, one run from starter to ignition switch for starting(hot in start position only), one run from a wire that is hot on start and run positions to distributor (if using hei). also run this wire to choke if its electric.

syd45 · 10-20-2007, 08:39 AM

You tap into the HEI hot wire for electric choke. the 6cly had an electric choke and i was planning on tracing the wire back and see if i could just tap into it. but if what you say is true it makes my life easier.

crashnzuk · 10-22-2007, 09:25 AM

Assuming that turbo 400 is behind your 6cyl, it will not bolt to your 350.
Travis..

10-14-2007, 06:58 AM	#1 (permalink)
syd45 Registered User Join Date: Jun 2007 Member # 93930 Posts: 40	89 YJ 350 swap ??? My YJ had a 6cly carb and I want to put a 350 carb in it. I know this will eliminate a lot of the wiring, but what do I need to keep. The electronic ignition control unit i think I can just bypass right? If so, what do I need to crank the engine? I have no Idea about what Im doing. Thanks for the help.

10-22-2007, 09:25 AM	#8 (permalink)
crashnzuk Registered User Join Date: Mar 2003 Member # 17632 Location: West Sacramento, CA Posts: 5,358	Assuming that turbo 400 is behind your 6cyl, it will not bolt to your 350. Travis.. __________________ 74 Ramcharger, 360, 4spd, 60/70 on 37s 91.5 Dodge 6BT 5 spd tow rig

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10-14-2007, 11:55 AM	#2 (permalink)
Ryalt Registered User Join Date: Jul 2007 Member # 95348 Location: Worcester, MA Posts: 65	First search, there are a lot of other people who have done the same/similar stuff. But I'd worry mostly about your axles, transmission and all that being able to take the power of a 350. Changing the engine isn't the only thing you have to do for that swap.

10-14-2007, 05:56 PM	#4 (permalink)
ld50 Registered User Join Date: Jun 2007 Member # 93767 Location: College Station, TX Posts: 97	Why not just buy a tbi 350, they are cheap and the wiring is not that difficult. The extra trouble it takes to install it will be less than the troubles you have with the carb in the future.

10-18-2007, 05:26 AM	#6 (permalink)
yjmaniac Registered User Join Date: Aug 2005 Member # 52203 Posts: 2	sbc carb wiring is easy, couple wires, one run from starter to ignition switch for starting(hot in start position only), one run from a wire that is hot on start and run positions to distributor (if using hei). also run this wire to choke if its electric.

10-20-2007, 08:39 AM	#7 (permalink)
syd45 Registered User Join Date: Jun 2007 Member # 93930 Posts: 40	You tap into the HEI hot wire for electric choke. the 6cly had an electric choke and i was planning on tracing the wire back and see if i could just tap into it. but if what you say is true it makes my life easier.