What's the next step up from a Racetronix 255LPH kit?
01-15-2018, 04:26 PM
#1
What's the next step up from a Racetronix 255LPH kit? I have the '98 255LPH kit from Racetronix, including the hotwire kit. If I wanted something that would support closer to 300LPH for future growth, what are my available upgrade paths?
01-19-2018, 09:18 AM
#5
Hi - I'm kind of in the same boat with an existing 255 and a planned 454 build that is probably going to be in the 550-600rwhp range and pushing the limits of the 255.
Is it just a matter of that drop in 340 pump and the C5 kit, no other fabbing needed? The existing hotwire kit can be reused? And no need to upgrade any wiring?
EDIT - also does it maintain the stock venturi setup?
Sounds like the next best thing after the 255. What's the HP limit for this setup?
Thanks!
Is it just a matter of that drop in 340 pump and the C5 kit, no other fabbing needed? The existing hotwire kit can be reused? And no need to upgrade any wiring?
EDIT - also does it maintain the stock venturi setup?
Sounds like the next best thing after the 255. What's the HP limit for this setup?
Thanks!
Last edited by NHRATA01; 01-19-2018 at 09:34 AM.
01-19-2018, 11:37 AM
#6
It does not retain the venturi but the c5 reg/filter kit returns back enough fuel to keep the pump fed nicely. That's why we designed it like that.
If you have the newest hotwire with the flat bulkhead for the 99-02 style or a newer style 98 kit then you dont need a new harness.
The c5 reg/filter kit is the only part that needs modification to the car. otherwise thats it!
If you have the newest hotwire with the flat bulkhead for the 99-02 style or a newer style 98 kit then you dont need a new harness.
The c5 reg/filter kit is the only part that needs modification to the car. otherwise thats it!
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04-24-2018, 10:25 PM
#13
04-25-2018, 10:20 AM
#14
The 98 module is different in every way. it also has a short harness off it to the fuel pump hookup like the 97s did. I believe racetronix is working on a better bulkhead solution, but right now it is the way it is. Our 340 kits literally come with everything you need so get the whole kit and no need for guessing.
04-25-2018, 11:17 AM
#15
Looks like a replacement bulkhead connector for 98's is readily available thru different vendors/suppliers.
The intank wire harness running from from the bulkhead connector to the RXP 341 pump is nearly identical in the 99 340 kit as the 98 340 kit (looks like two 14 gauge teflon coated). So that item is adequate.
However the 99 340 kit has an upgraded bulkhead connector. So the question, IMO, is if the outside wire loom running from the yellow bulkhead connector on the 98 fuel module assembly adequate to handle the additional voltage required by the RXP341 pump.
One vendor on this site says no.
But if it's not, then how can it be that Racetronix on their 98 kit added a wire harness allowing you to add a pump booster which can push up to 15-16 volts to the pump. Note all of the amplied voltage from the pump booster goes thru the wire loom attaching to the yellow bulkhead connector and into the pump. Only one way in and one way out.
If you lookup the specs for the yellow plug in the bottom pic on Racetronix site, it states 14 amps maximum per terminal (4) compared to 30 amps on two terminals in the plug that is supplied with the 99-2002 upgrade kit. So IMO it looks as if a replacement plug for the yellow bulkhead connector should have two terminals that support 30 amps instead of just 14 per terminal. Obviously the in tank wire harness would need a female plug that would mate to the inside male end of the plug.
Racetronix sells a dual pump kit for the 98, but make no mention that the bulkhead connector is inadequate. They do stipulate, however, that you are on your own when installing.
It does seem fairly easy to modify the connection as some are already doing. The question from the vendor is if that plug has the two terminals that support 28 amps. See link
https://www.google.com/search?q=ac+d...Pn5ubmwwSyg3M:
Hmmmn - interesting - see below
The intank wire harness running from from the bulkhead connector to the RXP 341 pump is nearly identical in the 99 340 kit as the 98 340 kit (looks like two 14 gauge teflon coated). So that item is adequate.
However the 99 340 kit has an upgraded bulkhead connector. So the question, IMO, is if the outside wire loom running from the yellow bulkhead connector on the 98 fuel module assembly adequate to handle the additional voltage required by the RXP341 pump.
One vendor on this site says no.
But if it's not, then how can it be that Racetronix on their 98 kit added a wire harness allowing you to add a pump booster which can push up to 15-16 volts to the pump. Note all of the amplied voltage from the pump booster goes thru the wire loom attaching to the yellow bulkhead connector and into the pump. Only one way in and one way out.
If you lookup the specs for the yellow plug in the bottom pic on Racetronix site, it states 14 amps maximum per terminal (4) compared to 30 amps on two terminals in the plug that is supplied with the 99-2002 upgrade kit. So IMO it looks as if a replacement plug for the yellow bulkhead connector should have two terminals that support 30 amps instead of just 14 per terminal. Obviously the in tank wire harness would need a female plug that would mate to the inside male end of the plug.
Racetronix sells a dual pump kit for the 98, but make no mention that the bulkhead connector is inadequate. They do stipulate, however, that you are on your own when installing.
It does seem fairly easy to modify the connection as some are already doing. The question from the vendor is if that plug has the two terminals that support 28 amps. See link
https://www.google.com/search?q=ac+d...Pn5ubmwwSyg3M:
Hmmmn - interesting - see below
Last edited by dlandsvZ28; 04-25-2018 at 10:23 PM. Reason: add model year - edit specs on connector