Jist finishing Chevy 350 conversion in my 84 CJ7 questions on hooking up vapor can - JeepForum.com
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Unread 04-19-2013, 09:52 PM   #1
mooncruiser
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Jist finishing Chevy 350 conversion in my 84 CJ7 questions on hooking up vapor can

I was wondering if those that have done a Chevy V8 conversion are using the fuel filter that is on the stock 6cyl? The filter that has the extra connection that runs to the canister? I'm running a carburetor, not FI. Is it necessary to hook this up or just plug it??

Also, there is also a thick rubber hose that goes "somewhere"...it is the outlet on the top of the canister closest to the firewall which I'm not sure if it was even hooked up to anything before I pulled the motor. The one on my cannister has a broken off white tube, like 3/8" diameter in the tube. Does this need to be connected? I was running a Weber on my 6 cylinder.

From what I found, it says this thick hose goes to the carb bowl vent which my Weber didn't have and neither does the Edelbrock 1406 I'm using (for now) on my 350.

thx

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84 CJ7, Chevy 350, Muncie SM465 4 spd, Dana 300, Autometer gauges, YJ spring conversion with OME springs, Bilsteins rear, Rancho 9000's...Dana 60's in the future

93 YJ - 2.5 5spd, NP231 tcase, 4.10 f & r , Posi-Lock front axle, 1" body lift, pretty stock otherwise

Last edited by mooncruiser; 04-19-2013 at 10:18 PM.. Reason: added text
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Unread 04-19-2013, 11:41 PM   #2
lucdog
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The fuel pump on Your 350 should have 3 connections. 1 from the the tank, 1 to the carb, and a return to the tank. You don't need the 258 filter, with 3 connections.
I would still run a filter between the pump and carb. Inlet and outlet with no return.

Bill
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1957 WILLYS pickup, needs work.
1973 J 4000,
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1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
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Unread 04-20-2013, 08:08 AM   #3
mooncruiser
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Quote:
Originally Posted by lucdog View Post
The fuel pump on Your 350 should have 3 connections. 1 from the the tank, 1 to the carb, and a return to the tank. You don't need the 258 filter, with 3 connections.
I would still run a filter between the pump and carb. Inlet and outlet with no return.

Bill
Bill-

I went out to double check and the fuel pump has 2 connections. The one I pulled off the block before rebuilding also had 2 connections.
fuelpump84cj7.jpg   vaporcanister84cj.jpg  
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Living in God's country in southern Arizona.

84 CJ7, Chevy 350, Muncie SM465 4 spd, Dana 300, Autometer gauges, YJ spring conversion with OME springs, Bilsteins rear, Rancho 9000's...Dana 60's in the future

93 YJ - 2.5 5spd, NP231 tcase, 4.10 f & r , Posi-Lock front axle, 1" body lift, pretty stock otherwise
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Unread 04-20-2013, 08:19 AM   #4
mooncruiser
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So I'm thinking just leaving the canister as is, it's connected to the tank but I don't have a line to the pcv-should I tee it into the pcv, there is not a carb bowl vent on this carb-so that one will be plugged, and then there is the ported vacuum-I can hook that up to the Edelbrock since it has a ported and manifold vac connection. Don't know if i should get the 6 cyl fuel filter and connect that line or what?

I've ran chevys in a landcruiser before and not had to worry about this line
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Living in God's country in southern Arizona.

84 CJ7, Chevy 350, Muncie SM465 4 spd, Dana 300, Autometer gauges, YJ spring conversion with OME springs, Bilsteins rear, Rancho 9000's...Dana 60's in the future

93 YJ - 2.5 5spd, NP231 tcase, 4.10 f & r , Posi-Lock front axle, 1" body lift, pretty stock otherwise
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Unread 04-20-2013, 09:56 AM   #5
Jon In Tucson
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Quote:
Originally Posted by mooncruiser View Post
So I'm thinking just leaving the canister as is, it's connected to the tank but I don't have a line to the pcv-should I tee it into the pcv, there is not a carb bowl vent on this carb-so that one will be plugged, and then there is the ported vacuum-I can hook that up to the Edelbrock since it has a ported and manifold vac connection. Don't know if i should get the 6 cyl fuel filter and connect that line or what?

I've ran chevys in a landcruiser before and not had to worry about this line
Moon,
I think that teeing the fuel evap into the pcv line and triggering it with ported vacuum tis the way to go. The only snag I see in using the two outlet fuel filter is the possibility of starving the big Chevy motor in a high rev crawling situation. I truly like the design idea by AMC using the bypass line on those fuel filters. Fuel is filtered and sent back to the tank if not used by the engine. Seems to me that in the long run, your tank and fuel system would have less "gunk" in it. BTW, your swap is looking top notch. God bless.
Jon In Tucson
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Unread 04-20-2013, 10:06 AM   #6
lucdog
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Jon, the fuel isn't filtered before it goes to the bypass.

OP. from the factory the fuel pumps I've seen have had a return.
__________________
1957 WILLYS pickup, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
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Unread 04-20-2013, 03:39 PM   #7
Jon In Tucson
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Quote:
Originally Posted by lucdog View Post
Jon, the fuel isn't filtered before it goes to the bypass.
I was not aware of that... God bless.
Jon In Tucson
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Unread 04-20-2013, 10:51 PM   #8
mooncruiser
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Quote:
Originally Posted by Jon In Tucson View Post
Moon,
I think that teeing the fuel evap into the pcv line and triggering it with ported vacuum tis the way to go. The only snag I see in using the two outlet fuel filter is the possibility of starving the big Chevy motor in a high rev crawling situation. I truly like the design idea by AMC using the bypass line on those fuel filters. Fuel is filtered and sent back to the tank if not used by the engine. Seems to me that in the long run, your tank and fuel system would have less "gunk" in it. BTW, your swap is looking top notch. God bless.
Jon In Tucson
Thx Jon
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84 CJ7, Chevy 350, Muncie SM465 4 spd, Dana 300, Autometer gauges, YJ spring conversion with OME springs, Bilsteins rear, Rancho 9000's...Dana 60's in the future

93 YJ - 2.5 5spd, NP231 tcase, 4.10 f & r , Posi-Lock front axle, 1" body lift, pretty stock otherwise
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