Install help-Weber 38 and Holley 12 804 fpr - JeepForum.com

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post #1 of 26 Old 01-26-2013, 01:33 PM Thread Starter
Tubzcj
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Install help-Weber 38 and Holley 12 804 fpr

Ok guys after doing a lot of research and reading tons of thread reading here I ordered the weber 38 (Spain), Holley 12 804 fpr, and a pressure gauge. Got home from running some errands and all of my parts where sitting on the porch. I have some questions and could really use the help from people that have ran this set up before.

newly built not driven.
258 punched 30/port and polished/performance cam/headman headers/DUI

1) will I need to order different jets then what are currently in the redline 38?

2) does the fpr need to be installed before or after the fuel filter?

3) fpr mounting options?

4) I have read mixed reviews about the mounting plates and gaskets leaking. What is the best route here?

5) tuning tips on the weber?

6) where is the best place to locate my hot wire for the EC?

Any help would be greatly appreciated

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post #2 of 26 Old 01-26-2013, 01:57 PM
Matt1981CJ7
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1. The factory jetting is for a sea level application. I think it should be pretty close for you. I don't recall the jet sizes, but a few searches will turn up that info.

2. After.

3. See pic below. Not the most elegant homemade contraption, but it works.

4. I had mine on and off several times, even re-used the gaskets a few times. Never had any leaks. Just check that the mounting plate is flat and has no casting imperfections.

5. Search for a thread called Weber Set-up and Tune Discussion.

6. In the wiring harness. (Your manual's wiring diagram should show it.)

Good luck,

Matt
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post #3 of 26 Old 01-27-2013, 08:00 AM Thread Starter
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Thanks dude. Going to do it today?
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post #4 of 26 Old 01-27-2013, 02:17 PM Thread Starter
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There is a nipple that the instructions have label as power brake fitting that is stopping the flow of my linkage. When I took off my old carb the line ran to the top of the valve cover?

Can I plug this? I have a brake booster ???
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post #5 of 26 Old 01-27-2013, 02:19 PM Thread Starter
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Bracket turned out nice.
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post #6 of 26 Old 01-27-2013, 02:33 PM Thread Starter
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This isn't threaded and I feel that I need to plug it. Just tap it ??
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post #7 of 26 Old 01-27-2013, 02:39 PM
Matt1981CJ7
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Nice bracket!!

I can't believe someone actually copied my redneck design.

Is your PCV hooked-up to a manifold vac source on your carb? Are you running the charcoal canister? EGR? TAC? CTO?

Matt
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post #8 of 26 Old 01-27-2013, 02:44 PM
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Quote:
Originally Posted by Tubzcj View Post
This isn't threaded and I feel that I need to plug it. Just tap it ??
Mine didn't need a plug.

Matt
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post #9 of 26 Old 01-27-2013, 03:11 PM Thread Starter
Tubzcj
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This is what was running off of my old set up from the pcv. I have seen some people on here and they have picture of this plugged.. I Eliminated all emissions equipment since I live in GA.


So can I plug the power brake fitting-is what weber directions is calling this? I have a port coming off of the intake going to the brake booster. The port is directly under the carb..
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post #10 of 26 Old 01-27-2013, 03:12 PM Thread Starter
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Port
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post #11 of 26 Old 01-27-2013, 03:24 PM
Matt1981CJ7
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So you have no PCV? How are you venting the crankcase?
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post #12 of 26 Old 01-27-2013, 03:32 PM Thread Starter
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I do have a pcv it was ran to this nozzle that is stopping my flow on my linkage. I would like to eliminate that nipple and just put a filter on top to the valve cover.. Thoughts?
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post #13 of 26 Old 01-27-2013, 03:46 PM
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You still need a vacuum source to pull fresh air thru the filter into the crankcase.
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post #14 of 26 Old 01-27-2013, 03:49 PM Thread Starter
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I have the unit on the front end of valve cover that runs to the carb. This picture is where the pcv was ran from the front. Will that suffice?
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post #15 of 26 Old 01-27-2013, 04:00 PM
Matt1981CJ7
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Suffice for what? That's not a vacuum nipple.

You do understand how the PCV works, don't you?

Matt
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carb , carburetor , fuel pressure regulator , weber

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