AMC 258 Fuel Injection - JeepForum.com

 
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post #1 of 9 Old 02-20-2007, 05:47 PM Thread Starter
AMC Power
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AMC 258 Fuel Injection

Can you use the stock 4.2 head with fuel injection or do you have to do the 4.0 head swap?

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post #2 of 9 Old 02-20-2007, 07:27 PM
gt4660
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Two words, Howell Injection... Easy install ,runs great!
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post #3 of 9 Old 02-20-2007, 07:58 PM
Rob55
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Fi

I have the Hesco (Mopar) kit with the 4.2 head. It can be used either way but the manifolds must be matched to the kit you buy. I have heard good things about the Howell, but the Multi port is a little more efficient (and expensive) than the Howell TBI. It is huge advantage at altitude and big angles that challenge carbs.

1984 CJ7, 258, MPI, 4.0 head, Borla, 700r4, amc20 (detroit), Dana 30 (OX), 4.56 gears, Warn Hubs, Dana 300 with 4:1, 4.5 RE lift with 1" body, Bilsteins, dual battery, PS, PB, full cage, two dogs in the back....
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post #4 of 9 Old 02-20-2007, 08:02 PM
gojeepin
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The Howell kit is a throttle body fuel injection kit. It mounts to the intake manifold much like a carb. No need to replace the intake manifold... nothing but the carb.

It's a pressurized fuel system unlike the carb... no float or venturi. It's the simplest way to inject your engine.

The kit is very complete. It has the computer, wiring harness... all you need to hook it up.
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post #5 of 9 Old 02-20-2007, 08:26 PM
nichols077
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im also looking into fuel injection, but dont want to spend more on it than i did on my jeep. haha.
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post #6 of 9 Old 02-20-2007, 09:07 PM
ClarkGriswold
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Quote:
Originally Posted by gojeepin
The Howell kit is a throttle body fuel injection kit. It mounts to the intake manifold much like a carb. No need to replace the intake manifold... nothing but the carb.

It's a pressurized fuel system unlike the carb... no float or venturi. It's the simplest way to inject your engine.

The kit is very complete. It has the computer, wiring harness... all you need to hook it up.
Does anyone know the approx cost of the Howell kit and where to find it? Part number, etc? Does it provide any additional HP?
If I was changing my Carter carb - what would be best?...the Howell throttle body or a Weber or Motorcraft carb?

"That's nothing to be proud of Rusty. .....fifty yards." - Clark Griswold

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post #7 of 9 Old 02-20-2007, 09:20 PM
jeepin in maine
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if your interested in building your own,research doing the gm throttle body swap before you dump big $$.i think thats the route i'm going to go.heres some info i found that initially got me interested in this idea.
http://www.jeepforum.com/forum/f8/totw-fuel-injection-229253/
http://www.binderbulletin.org/forums...ad.php?t=47254
http://www.bustedjeep.com/projects/gmtbi.asp
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post #8 of 9 Old 02-20-2007, 09:25 PM
Rob55
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Fi

The Howell kit is on ebay for aout $1145 from Collins. The off road only kit is a little less.

http://cgi.ebay.com/ebaymotors/HOWEL...spagenameZWD1V


The MPI kit is available at Hesco, for about $2300.

http://www.hesco.us/shop.asp?action=...025&catId=7577

Hesco is rated at higher horsepower, and has a few aftermarket parts to boost it further. Both are a better choice (in my opinion) than carb...although FI is more complicated to troubleshoot on the trail if your not familiar with it.

FI should increase gas mileage (over a carb) as well.

1984 CJ7, 258, MPI, 4.0 head, Borla, 700r4, amc20 (detroit), Dana 30 (OX), 4.56 gears, Warn Hubs, Dana 300 with 4:1, 4.5 RE lift with 1" body, Bilsteins, dual battery, PS, PB, full cage, two dogs in the back....
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post #9 of 9 Old 02-21-2007, 12:30 AM
BIGM
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www.sierrajeep.com has a good comparison of the two FI kits.
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