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Unread 05-20-2013, 09:53 AM   #1
wrangleryj89jp
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1989 YJ Wrangler 
 
Join Date: May 2013
Location: Burnsville, Minnesota
Posts: 52
Performance Carb compatibility for 89 yj TBI...

I was wondering what is the best option for a performance carburetor for my 89 yj? And where would I be able to find one that fits my jeep wrangler yj?

I have a 2.5Liter I4, with everything on it stock. I have decided to make some upgrades on some of the parts to get better performance out of it.

I currently run the stock TBI Unit, which, in my opinion, needs to go.

The problem is, on everything on quadratec and other similar sites out there for Jeeps, all of the carbs are for 6 cylinders. I only see one for four cylinders on quadratec. The model of this is Weber "32/36 DGEV Carburetor"...

Here is the link to it:
http://www.quadratec.com/products/51312_55_07.htm

It says it is for 87-88 yj wranglers with 151 c.i. engines... To my knowledge, the 87 and 88 are near the same as 1989 yj's. How come it marks it on quadratec as non compatible with 89 yj's then?

I could see compared to 91 through 1995 models?

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Unread 05-20-2013, 11:26 AM   #2
superj
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1987 YJ Wrangler 
 
Join Date: Mar 2008
Location: corpus christi, texas
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are the older ones fuel injected also? that might be why, if they are carb'd and yours is stock fuelie.

the 32/36 is a great carb for an inline 4. i ran one on my bmw 2.5 and took of the fuel injection and it was a world of improvement. gas mileage and power increased noticeably
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Unread 05-20-2013, 11:31 AM   #3
Old4X
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1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
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You will need an ignition system, including distributor if you ditch the FI.

Not worth the hassle. Just drop a 4.0 in and you will have more power than you could ever get from the 4 popper, and will be all stock jeep parts.
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Unread 05-20-2013, 11:40 AM   #4
wrangleryj89jp
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1989 YJ Wrangler 
 
Join Date: May 2013
Location: Burnsville, Minnesota
Posts: 52
So, i'm not yet too familiar with jeeps since this is my first one... the stock TBI on an 89 yj, is that considered a carb or fuel injector? I know it might be a dumb question but I am a little confused because I have heard its kinda like an inbetween or something..
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Unread 05-20-2013, 12:02 PM   #5
hazaelnolasco
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1990 YJ Wrangler 
 
Join Date: May 2013
Location: La esperanza, Intibuca Honduras
Posts: 2
Okay, here is a personal experience of mine, I have a 90 wrangler, same of yours, decided to swap to carb because of all the wire, induction problems, etc. searching for the Carb I found 2 possibilities, Weber 32/36 or Toyota 22r stock carb, after researching a lot, I found out that 32/36 makes a little bit more fuel economy than 22r carb, but this comes with a price "Power". 32/36 delivers a fuel mix of 300 cfm to the engine, while 22r carb delivers 326 cfm. Anymay, I almost decided to go through 32/36 but I found a new (slightly used) 22r carb for 100 bucks, )weber cost me more than 200... So I started with the conversion, swaped the coil for an electric 22r one, fuel pump was still electrical, but with a flow return tube from the carb, manifold was adapted in a workshop, after all this I started running the engine, with a much better mpg (20-21) depending on how i drive, and anly had to give maintenance to it after 10,000 km, which was clarb cleaning process. One friend of mine has a 32/36 on his , and the power difference is very noticeable, I trully recomend this swap for all those pre 91 4 bangers
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Unread 05-20-2013, 01:08 PM   #6
Old4X
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1990 CJ7 
 
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OP has a fuel injected 4 banger, not a 4.2 AMC 6 banger.

No carburetor on that 4 cyl, it is a throttle body injector, computer controlled.
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Unread 05-20-2013, 02:57 PM   #7
hazaelnolasco
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1990 YJ Wrangler 
 
Join Date: May 2013
Location: La esperanza, Intibuca Honduras
Posts: 2
until 90, wrangler came with the TBI computer controlled injection, which is "carblike" throttle body connected to the manifold of the car. its not individual per cylinder as the post 90 ones.
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