Lq9 swap with Carb need help with pump
10-22-2012, 03:19 PM
#1
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Lq9 swap with Carb need help with pump Im building a LQ9 out of a 2005 Escalade, Im having it bored .30 over, new bearings, LS3 heads, with PRC springs, and a custom ground cam, around 603/602 cant exactly remember off the top of my head. Anyways, all this is going into a 1975 Trans Am, and Im going a Dual plane, with a 850 carb and the MSD set up to make it all run.
My question is I have bought a brand new tank, and Im trying to figure out what pump and where... I know the topic has been covered, but Im having a difficult time getting the info, maybe Im lost?? Ok now Im looking at other post, do I have to run a return line with a carb set up?? If I have a inline fuel pump, It comes a single line off the tank, I run a fuel filter, and its a single line to the regulator, and than a single line to a carb...
Thanks for the help..
Kevin
My question is I have bought a brand new tank, and Im trying to figure out what pump and where... I know the topic has been covered, but Im having a difficult time getting the info, maybe Im lost?? Ok now Im looking at other post, do I have to run a return line with a carb set up?? If I have a inline fuel pump, It comes a single line off the tank, I run a fuel filter, and its a single line to the regulator, and than a single line to a carb...
Thanks for the help..
Kevin
Last edited by qnitro; 10-22-2012 at 03:25 PM.
10-23-2012, 05:19 AM
#3
Yeah, there are a number of active threads on pump set ups. A return style regulator will make your pump more quiet, live longer and support more HP from the same pump. You will need a fairly good sized system to feed that motor.
That is a pretty big cam. Second the notion on a Vic Jr or even super vic
That is a pretty big cam. Second the notion on a Vic Jr or even super vic
10-23-2012, 09:14 AM
#5
That definitely simplifies things. Might even make the pump self priming. I would have worried about the fuel heating up but if you aren't having any trouble in the Texas heat then it must work good.
10-23-2012, 10:24 AM
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Im running no return on the speedway 125gph pump (holley blue), Lq9, trickflow heads vic jr..... regulator set to 7.5psi holley 850... switching to a demon 1000cfm for next year.
10-23-2012, 10:51 AM
#7
One of the things that a properly set up return line system can do is help against vapor lock on hot days. Those 2nd gens can hold a lot of heat under the hood. So, if you do end up having vapor lock with a simple dead head system, a return system and a phenolic or wood spacer under the carburetor will solve it. You can guess how I know........
As for your intake manifold, there is not enough information in your opening post to make any recommendations on your combo. You did not state stick or auto, if auto the stall speed or your rear gear. These are the things that determine the best choice of intake. LIft does not tell much about a camshaft. These days even a .600" lift camshaft could have a very short duration. Knowing the full specs on the cam would be helpful if you happen to be looking for intake advice also.
As for your intake manifold, there is not enough information in your opening post to make any recommendations on your combo. You did not state stick or auto, if auto the stall speed or your rear gear. These are the things that determine the best choice of intake. LIft does not tell much about a camshaft. These days even a .600" lift camshaft could have a very short duration. Knowing the full specs on the cam would be helpful if you happen to be looking for intake advice also.
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10-23-2012, 01:32 PM
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One of the things that a properly set up return line system can do is help against vapor lock on hot days. Those 2nd gens can hold a lot of heat under the hood. So, if you do end up having vapor lock with a simple dead head system, a return system and a phenolic or wood spacer under the carburetor will solve it. You can guess how I know........
As for your intake manifold, there is not enough information in your opening post to make any recommendations on your combo. You did not state stick or auto, if auto the stall speed or your rear gear. These are the things that determine the best choice of intake. LIft does not tell much about a camshaft. These days even a .600" lift camshaft could have a very short duration. Knowing the full specs on the cam would be helpful if you happen to be looking for intake advice also.
As for your intake manifold, there is not enough information in your opening post to make any recommendations on your combo. You did not state stick or auto, if auto the stall speed or your rear gear. These are the things that determine the best choice of intake. LIft does not tell much about a camshaft. These days even a .600" lift camshaft could have a very short duration. Knowing the full specs on the cam would be helpful if you happen to be looking for intake advice also.
10-25-2012, 12:51 AM
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whats your take on the Edelbrock Quiet-Flo Electric Fuel Pump 1791?? I want something to be a little quiet.. Im looking at 580-600 crank HP will this work??
10-25-2012, 02:14 AM
#11
I plan to use my walbro inline 255lph pump through The corvette fuel filter that has a return line from it . This is a self regulating filter for fuel injection but I'm going to run a dead head regulator up front by carb at 6.5 psi. Everything it don't need will return through return off filter.
I already had this fuel system for fuel injection so I'm using it .
As for your intake, go Vic jr or super Vic with that 6 spd.
I already had this fuel system for fuel injection so I'm using it .
As for your intake, go Vic jr or super Vic with that 6 spd.
10-26-2012, 01:29 AM
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OK another question.. which carb.. Im thinking a 850, I want to run a electric choke.. anything I should look for or what kind?? Thanks guys your making htis easier, and hopefully when people look up this topic it will help them as much as me
