Dual In Tank Pump Install
Racer
Joined: Aug 2016
Posts: 354
Likes: 54
This was the reason I posted above, simply to make the point that the OEM discharge line is very restrictive feeding over the top.
Supporting Vendor
Joined: Dec 2001
Posts: 1,573
Likes: 31
From: A dealer near you.
What level of HP will the Racetronix dual pump kit support when feeding fuel through the OEM tank discharge line (<0.375"ID) as shown in the pic included above? I had asked the question prior, but it was never answered.
This was the reason I posted above, simply to make the point that the OEM discharge line is very restrictive feeding over the top.
This was the reason I posted above, simply to make the point that the OEM discharge line is very restrictive feeding over the top.
Generally we state that staged twin 255LPH pumps can support apx 800FWHP FI on gasoline using the factory lines + rails with a base pressure of 43.5PSI @ 13.5V.
Twin 340LPH pumps can't be run on factory lines.
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Manufacturer/distributor of Fuel System Components & Electronics
EST 1999
[b][url="http://racetronix.com/"]>WEB SITE
Manufacturer/distributor of Fuel System Components & Electronics
EST 1999
[b][url="http://racetronix.com/"]>WEB SITE
Racer
Joined: Aug 2016
Posts: 354
Likes: 54
The answer to this question is very broad since many factors determine the fuel requirements for a given HP level such as fuel type, motor BSFC, operating temperature, supply voltage and target A/F.
Generally we state that staged twin 255LPH pumps can support apx 800FWHP FI on gasoline using the factory lines + rails with a base pressure of 43.5PSI @ 13.5V.
Twin 340LPH pumps can't be run on factory lines.
Generally we state that staged twin 255LPH pumps can support apx 800FWHP FI on gasoline using the factory lines + rails with a base pressure of 43.5PSI @ 13.5V.
Twin 340LPH pumps can't be run on factory lines.
There was no negative meant towards the Racetronix pumps, moreover a comment that the factory lines need to be upgraded like the OP (and likely many others) have done.
This dual 340 pump is a nice fueling system for the higher HP C4s!
Supporting Vendor
Joined: Dec 2001
Posts: 1,573
Likes: 31
From: A dealer near you.
Are the pic I referenced with my first post above as well as the pic that Dizwiz posted shows both using the dual 340 pumps on factory discharge piping over the top of the tank? That was the point of my comment that the factory discharge tube in a C4 is simply to small (<0.375" ID) to support the HP levels that the dual 340 pumps are designed to support.
There was no negative meant towards the Racetronix pumps, moreover a comment that the factory lines need to be upgraded like the OP (and likely many others) have done.
This dual 340 pump is a nice fueling system for the higher HP C4s!
There was no negative meant towards the Racetronix pumps, moreover a comment that the factory lines need to be upgraded like the OP (and likely many others) have done.
This dual 340 pump is a nice fueling system for the higher HP C4s!
Race Director
Joined: Sep 2001
Posts: 14,682
Likes: 753
From: NEwhere Ohio
while my application isnt anywhere as powerful as Aarons, I upgraded my lines to -6 return , -8 feed, low restriction filter.
i used compression fittings on the ends of the 3/8” lines coming out of the tank. Put an adapter in them with -an nipples (-8 and -6 return) coming off of those.
i also hacked off the end of the 3/8” fuel tube inside the tank where it necks down to 1/4” .
so i hacked off the 1/4” portion of the metal tubing.
what i did NOT do was upgrade the fuel rail (1994-96 series style rail)
Instead, i put a fuel pressure gage sender at the end of it so I can monitor if it ‘drops’
no issues with e85, 80 lb/hr injectors, and prob 600-650 flywheel hp
Racer
Joined: Aug 2016
Posts: 354
Likes: 54
