Fuel system for 1000 whp
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Joined: Jan 2009
Posts: 1,601
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From: Zionsville, IN
Thanks for the advice Carey and everyone, really appreciate that. Is it possible to get a mechanical pump to work with all of the stock accessories or would I have to give up A/C to get it done? If it's possible, do you just run something like a 340 pump from the tank to the mechanical or would you need to run a 340 to a surge tank and then another larger pump to feed the mechanical? I'm just not sure on how that system should be setup. Please excuse my ignorance on it.
You could keep all your current fuel system in place and do it all in the engine bay if you'd like.
You would take the feed from your in-tank pump and feed the surge tank (fitting at the top of surge tank). This is the line that used to feed your fuel rails. And the bottom of the surge tank you'll have a -10/-12 out feed the mechanical, out of that pump to the rail/s, out of the rail/s to the regulator, out of the regulator back to the surge tank (another fitting on the top of surge tank). Then a return (at the top of the surge tank) to return back to your stock tank. This way the mechanical pump has no way to suck the surge tank dry during a long WOT pull as it can more than outflow your in tank pump. You can use check valves and what not to keep pressure in the surge tank, but it'll work either way.
Hope that makes sense. It sounds more complicated than it really is.
The hardest part will be rigging up a way to drive the mechanical pump with all the accessories in place.
Thread Starter
Joined: Mar 2003
Posts: 6,507
Likes: 51
From: Sellersburg, IN
I'd have to look at the front of a motor with all the accessories on to see how to drive it. It's been a long time since I had accessories on my engine...haha.
You could keep all your current fuel system in place and do it all in the engine bay if you'd like.
You would take the feed from your in-tank pump and feed the surge tank (fitting at the top of surge tank). This is the line that used to feed your fuel rails. And the bottom of the surge tank you'll have a -10/-12 out feed the mechanical, out of that pump to the rail/s, out of the rail/s to the regulator, out of the regulator back to the surge tank (another fitting on the top of surge tank). Then a return (at the top of the surge tank) to return back to your stock tank. This way the mechanical pump has no way to suck the surge tank dry during a long WOT pull as it can more than outflow your in tank pump. You can use check valves and what not to keep pressure in the surge tank, but it'll work either way.
Hope that makes sense. It sounds more complicated than it really is.
The hardest part will be rigging up a way to drive the mechanical pump with all the accessories in place.
You could keep all your current fuel system in place and do it all in the engine bay if you'd like.
You would take the feed from your in-tank pump and feed the surge tank (fitting at the top of surge tank). This is the line that used to feed your fuel rails. And the bottom of the surge tank you'll have a -10/-12 out feed the mechanical, out of that pump to the rail/s, out of the rail/s to the regulator, out of the regulator back to the surge tank (another fitting on the top of surge tank). Then a return (at the top of the surge tank) to return back to your stock tank. This way the mechanical pump has no way to suck the surge tank dry during a long WOT pull as it can more than outflow your in tank pump. You can use check valves and what not to keep pressure in the surge tank, but it'll work either way.
Hope that makes sense. It sounds more complicated than it really is.
The hardest part will be rigging up a way to drive the mechanical pump with all the accessories in place.
BTW, I believe SOS has a pretty nice surge tank that goes in place of the EVAP canister if you think that's the size I'll need.
Sorry for all the questions.
Last edited by Spoolin; Mar 27, 2017 at 01:26 PM.
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