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Old 06-13-2012, 11:30 PM   #1
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Holley starving my 355 SBC

After 1 1/2 years of building this 94Yj, I got to do a shakedown run this last weekend.

The motor is a balanced and blueprinted 355 SBC, mild 184 heads, eliminator intake, mild cam, eliminator intake and holley 650.

When climbing pretty steep and fairly long hills, I noticed the motor beginning to stumble, especially when completely warm. I know the holley's are known for the fuel running to the back bowl and starving the motor.

Does any one have any suggestions for a better off road carb? I knowI know I should have went fuel injection, but the budget didn't allow for it.
I did notice that when the motor leaned out the temps really shot up.

Any advice would be greatly appreciated.
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Old 06-15-2012, 05:10 PM   #2
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I have a 650 with a kit similar to this and I have had ho hill issues....

HOLLEY 4 BAREL TRUCK AVENGER PARTS CONVERSION KIT, BG QFT CARBS | eBay

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Old 06-16-2012, 01:47 AM   #3
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Well after further investigation, I ran the jeep up on some old tractor tires with the plenum and filter off and watched the carb. I have short vent tubes that are slant cut at a 45 degree angle. At the steep angle fuel is running out of the back tube and straight into the barrels and actually flooding the motor out. Thanks for the link for the avenger kit. I am going to try this. Makes sense the taller tube will prevent the problem. Thanks. How are you cooling the V8? I guess I am fighting a 2 part problem. You solved at least one. I have a AFCO 22x18 all aluminum radiator, standard water pump. At first I tried a mechanical 6 blade fan and shrouded it. It still got hot. Then I put a 16" electric fan and looks like it will still get hot under a load. I have gone through everything I can think of, thermostat(160), deionized water with water wetter(supercool). I think I am trapping heat from the headers in the engine compartment. I am going to ceramic coat and wrap the headers and figure out some way to vent the engine compartment first.
Thank you for replying. I was getting frustrated, and I thought the wiring part was difficult. Thanks again
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Old 06-16-2012, 02:03 AM   #4
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Functional hood vents, took all of about 10 bucks to do, if you have all the tools that is:



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Old 06-16-2012, 04:30 PM   #5
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If you don't mind me asking, Where did you find the hood vents? Looks nice.
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Old 06-16-2012, 04:36 PM   #6
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They're off a turbo lebaron, or turbo new yorker, got them in the junkyard, and painted them black
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Old 06-16-2012, 11:51 PM   #7
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I had a cooling problem as well.
I used this scoop:
Hood scoop small cowl fiberglass Ranger Blazer RX7 S10 | eBay

I have a aluminum double 1" core (which sounds like what you have) I finally had to shroud a flex mechanical fan and also put an electric pusher on the front. I have it set to come on at 190'. It runs between 190 and 212 now.

Put in a bottle of water wetter also, it cant hurt.
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Old 06-17-2012, 12:59 AM   #8
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cowl induction hood

Sorry you had to deal with this too. I wish I had moved the motor back another inch. It is getting tight in the front. I am ordering a 25"x 19" 1" 2 core tomorrow. Should give me another 15% cooling ability. I am going to try 2 12" fans diagonal with shrowd. I am going to vent behind the fenderwells and finish out my cowl induction hood I originally built. Where are you located in NM. I am just east of Amarillo.
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Old 07-02-2012, 11:57 PM   #9
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Sharp hood, I am in Alamogordo.

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