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Unread 09-10-2013, 09:03 AM   #1
TheJBJester
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1996 XJ Cherokee 
 
Join Date: Apr 2012
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1983 Jeep Scrambler - In tank fuel pump?

Hi there,

I have an 83 Scrambler that my father converted to a 350 years back. I have recently decided to get it back on the road; needs transmission, brake lines done, body work, and the fuel pump must be taken care of.

Fuel pump burns out because (I think) it doesn't have enough juice, being externally mounted, to supply ample fuel to the thirsty V8. I want to get a tank with a pump inside, or utilize any suggestion one of you out there may have specifically regarding this problem.

Thank you very much,
Jesse

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Unread 09-10-2013, 09:55 AM   #2
Blakescj7
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1985 CJ7 
 
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Location: Tulsa, Ok
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How much psi is putting out? If its a carburetor it only needs 4-6psi. And I'd stick with external inline pump. Makes it much easier to replace and maintain. Not to mention they are usually cheaper in ny opinion.
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Unread 09-10-2013, 12:38 PM   #3
dg6772
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1986 CJ7 
 
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Location: Muskegon, Michigan
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I put My own pump into the tank on my 86 using parts from a Chevy pump assembly. Not hard, just took some time to fit in hole. It's much smaller than the G.M. one, and it works great!

Dave in Muskegon
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Unread 09-10-2013, 12:49 PM   #4
Blakescj7
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In tank setups aren't bad. I'd just rather have it easily accessible.
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Unread 09-10-2013, 01:30 PM   #5
Manhattan
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1981 CJ8 
 
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The downside to external high-flow pumps is noise. My MSD is as loud as the motor/exhaust. It sounds like an old seatbelt buzzer going off. I'm also looking Into in-tank setups.
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1981 CJ8, Chevy 5.7, SM465, D300, RE 4.5, 35" BFG MTs, 20/30 4.56, Detroits, Warn 9500ti
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Unread 09-10-2013, 01:37 PM   #6
Blakescj7
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They make some that aren't very loud. And if you put rubber isolation pads on them it quiets down quite a bit.
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Unread 09-10-2013, 01:44 PM   #7
CSP
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If the 350 has a carb on it just stick with a mechanical, stock Chevy pump. They are dead-reliable.
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Unread 09-10-2013, 02:00 PM   #8
Blakescj7
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Quote:
Originally Posted by CSP View Post
If the 350 has a carb on it just stick with a mechanical, stock Chevy pump. They are dead-reliable.
And you know it will supply the engines needs just fine.
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Unread 09-10-2013, 02:21 PM   #9
dg6772
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1986 CJ7 
 
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Quote:
Originally Posted by Blakescj7 View Post
In tank setups aren't bad. I'd just rather have it easily accessible.
If fuel injected, as mine is, I've always figured that closer to stock was better. For repairs as well as parts availability. No waiting for shipping.

As for access....well, I can change mine in 30 mins. That's not too bad.

Dave in Muskegon
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Unread 09-10-2013, 04:55 PM   #10
TheJBJester
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It's TBI, and noise is not TOO much of an issue as it is after all a Jeep with a 350!

External: Any suggestions on a good pump that WON'T burn out?
Internal (Directed at dg6772): Which assembly did you use?

Thanks all for the prompt response!

Jesse
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Unread 09-10-2013, 06:19 PM   #11
Blakescj7
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MSD makes one and its fairly inexpensive.
http://www.jegs.com/webapp/wcs/store...=&pgGrp=search
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Unread 09-10-2013, 06:42 PM   #12
Spieg8
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1984 CJ8 
 
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Genright makes a nice tank/pump setup, but they want the wide money for it (they must think it's made of gold). For $900 I'll put up with the noise.
http://www.genright.com/ProductInfo....3#.Ui-8JSfnbb0

I'm running a Walbro high pressure in-line pump combined with a cheap Holly low pressure pump. Generally last me 8-9 years. First one lasted about 8 years, and I'm still running on the second one for almost 10 years (knock-on-wood). Make sure you keep the high pressure pump primed... starving them for fuel will destroy them pretty quickly. The a low pressure pump near the tank serves to prime the high pressure pump in the engine compartment.
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Unread 09-10-2013, 07:18 PM   #13
dg6772
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1986 CJ7 
 
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Location: Muskegon, Michigan
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Quote:
Originally Posted by TheJBJester View Post
It's TBI, and noise is not TOO much of an issue as it is after all a Jeep with a 350!

External: Any suggestions on a good pump that WON'T burn out?
Internal (Directed at dg6772): Which assembly did you use?

Thanks all for the prompt response!

Jesse
I used the assembly from a 1990 1/2 ton truck. I took the pickup,return tubes and pump brackets, then put all that on my CJ sending unit along with the electrical. Sounds much worse than it actually was.

Dave in Muskegon
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350 conversion , cj , fuel , scrambler

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