944Hybrids: 924/944/968 and 928 V8 Conversions
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HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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sbc 350 carbed motor what to do for fuel pumps ??

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Post  962porsche on Mon Sep 20, 2010 6:12 pm

my 350 sbc motor is carbed . what are people doing for the fuel system on the 944's running a carbed motor . are you leaving the mechanical gm fuel pumps and also using the porsche pick up pump in the tank . or going with a electric fuel pump and then what about the porsche pump ??
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Post  cfgioja on Mon Sep 20, 2010 6:49 pm

doesnt it depend on how much fuel is required by your carb? I know the electric pumps push out alot more pressure than the mechanical units. But on carb setups most dont require the fuel pressure fuel injections do.
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Post  962porsche on Mon Sep 20, 2010 7:48 pm

thats what i'm thinking . i have allot of experience with porsche's and there fuel systems . i have no experience with american cars and there fuel systems let alone a carbed motor . i know the carb is a holley 670 cfm on a sbc 350 motor 4 bolt main . i pulled it out of a s10 pick up that the customer abandoned at my shop 5 years ago . so i thought it would be cool to drop it in one of the 7 944's i have . i'm thinking the fuel pressure for a carb would be about 7 to 10 lbs ? the pump in the porsche runs at about 58 lbs and the regulator at the rail drops it to 33 to 39 lbs . the fuel thats not used returns back to the tank . so are people removing the porsche fuel pumps ? and just running a single line to the gm mechanical fuel pump ? or chocking the porsche pump down with a regulator that with what i'm thinking will burn out the porsche pump in no time .
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Post  cfgioja on Mon Sep 20, 2010 7:53 pm

I would just pull the pump out of the porsche and run the single line, that way you arent chancing fuel pump failure by creating more back pressure on the electric pump. It would be the easiest thing in my opinion.
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Post  Wild Bill on Mon Sep 20, 2010 8:08 pm



A Holley only needs 6-7 Psi and if you used a return to tank fuel pressure regulator set at that pressure the pump wouldn't have to work as hard as with a regulator set a 38 Psi. [url=Mallory][You must be registered and logged in to see this link.]


Last edited by Wild Bill on Mon Sep 20, 2010 9:17 pm; edited 1 time in total
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Post  962porsche on Mon Sep 20, 2010 8:13 pm

yep thats what i'm thinking ?? block off the return line back to the tank and just run the mechanical pump thats on the side of the motor . but i don't know if the pump on the motor will work with it in the porsche ? does it hit the sub frame or maybe the frame rail ? that i will have to see .
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Post  962porsche on Mon Sep 20, 2010 8:19 pm

O- thats great !!! thanks ! so it just returns the unused fuel back to the tank like what porsche does .
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