New fuel pump upgrade

[jasond29]

So I have been looking for a fuel pump upgrade that retains the factory pump features. I finally found it. Racetronix offers a 340lph jet pump that is a direct drop it n for the factory pump in the stock bucket with no modification. They do recommend the Hotwire kit to take advantage of the higher flowing pump so I also picked up the 03-06 corvette Hotwire kit. The connectors on the Hotwire kit use the same terminals as the factory viper apex connectors so i just ordered the correct apex connectors and swapped the wiring over. Doing this makes the wiring plug and play without splicing/hacking up your original harness. It also incorporates a inline connector for a voltage boost a pump if you want. This setup hopefully will support a good bit more power. I am currently heads and cam but I have a supercharger system on the way to put the system to the test. I think this is a great option for those who are in need of a pump replacement/upgrade while retaining all the stock benefits of the factory fuel bucket. Thanks
27879

[RyanLS.GEN2]

where did you actually get it, i t wont let me even see a price on their site, no one has a "j" instock

[J TNT]

Where you just at Arrow Racing Jason !
We may have crossed paths....lol !

[jasond29]

Yeah it is a pain to get in touch with them directly. There phone number is 905-477-7014

Sorry wasn't me at arrow, would love to visit though

[Boosted Motorsports]

Nice good stuff!

Looks very similar to the Aeromotive 340 drop in as well

https://www.aeromotiveinc.com/340-stealth/

[dave6666]

without splicing/hacking up your original harness

It's sad that people pay good money for as you say, an end result of your car has been hacked on. The primary reason I won't let any Viper Tech touch my car. I want to ensure that only craftsmanship was used to work on it.

Sorry you've had that experience. I would file claim against the person that worked on your car and as you posted, hacked on the wiring harness. Sucks bro.

[Viper Specialty]

This must be a new product, or they suck at advertising. I have been looking for something similar forever, and always came up empty.

That said, while it all looks good on paper, I have my reservations on quality. Their pumps are so cheap that it has me shaking my head. Are these cheap Chinese crap, or the rear deal? Compare Aeromotive 340's at about $120 to a comparable Racetronix at $90... that's 25% cheaper. Their 255's are CHEAPER than Walbro, which is the mass produced standard.

Would like to grab one just to break down and see what kind of quality it is.

[jasond29]

Sorry I don't think I was clear about the wiring kit. It is plug and play the into my existing harness, no modification to the factory wiring. This kit just runs a larger gauge wire from the alternator to the pump for the increased amps the pump requires. The connectors on the new harness goes I between the pump itself and the factory harness plug.

I got everything buttoned up today and took it for a drive, seems a little smoother just putting around but haven't really taken it wide open yet. Gonna go to the track next weekend and tweet my tune if need be. I think my old pump was at the limit and on its way out so that could have a lot to do with it to.

[jasond29]

The 340 I bought from them was 120 but I would love to see what your thoughts on the pump are. Biggest thing to me was retaining the factory function of the bucket and I just so happened to come across this on the LS forums. They are not well advertised and their customer service sucks but if you can get one of the good dealers you may have a better experience. Racetronix has been around a while in the LS world and from what I have seen have quality stuff. I have used their Hotwire kit before many years ago with success.

[Viper Specialty]

The 340 I bought from them was 120 but I would love to see what your thoughts on the pump are. Biggest thing to me was retaining the factory function of the bucket and I just so happened to come across this on the LS forums. They are not well advertised and their customer service sucks but if you can get one of the good dealers you may have a better experience. Racetronix has been around a while in the LS world and from what I have seen have quality stuff. I have used their Hotwire kit before many years ago with success.

I am planning to snag a standard 340 and a 340J next week to take a look at. I have an application I could use the J in, but since fuel flow in that app is near meaningless, while the venturi flow is important, I want to see what kind of quality they put into these things first, since I have a new Jet Walbro sitting on the shelf already.

If this is a nice piece, it will be a huge benefit for the Gen-2 guys who don't have the option of using Gen-4 canisters as a direct swap, and especially those guys who have 96-98's with the filler in the module top, since they have basically zero easy options currently.

[jasond29]

Cool beans

[slothman]

has anybody dropped in a single walbro 450? They look like nice pumps that support 800whp (gas) without a BAP and 600whp on E85. Would the 450lph work in a gen 2 ???

[Blue96GTS]

Cool Beans +1

[Lexciting]

Would this solution work for the Gen1s? Looks like I may have fuel limitations with my Heads/Cam setup and stock FP.
Also with the Fuel Pump being over 20 years old; it would be nice to have options!

[RyanLS.GEN2]

gen1 uses a different style pump all together, yours uses a bosch style pump that is a retro fit basically from a external fuel pump. you have quite a few options, more so that gen2/gen3

[ellowviper]

Has anyone done the math....Dan maybe...on how much fuel flow @ 55PSI that can actually get out of a GEN-II (2001 GTS system in my case) fuel pressure regulator? If you are not familiar with how the OEM system is designed (at least in the 2001/2002 model years), the factory pump feeds into the side fuel pressure regulator that has a integral bybass on the bottom that bleeds excess pressure (aka fuel) back into the basket. Actually a nice feature since it keeps the basket full and fuel pump immersed (factory pump is ALWAYS bleeding off excess fuel and pressure since its pumping more volume than the factory lines can handle or what the engine demands). So regardless of the LPH you are pumping into the system, once it hits 55 PSI, all your extra flow and volume is bled off back into the basket. BEFORE you go an install a 450 LPH pump into your basket and connect it into the existing system, you should probably try and figure out how much actual volume @ 55 PSI you can get out of the top of the FPR through that OEM 5/16th plastic elbow that connects to the fuel line. The last thing one needs is to grenade the fuel pressure regulator by pumping so much volume into it that can't be used (like at idle) or bled off (more volume than the FPR can bleed-off) and it pops-off in some unintended way. My system is demand-based...only pumps more fuel when its needed. A Boost-a-pump (regardless of your opinions of that system) effectively does the same thing.

[ellowviper]

I looked at a few calculators and discovered the following. A 5/16th fitting at 60 PSI can flow around 2 gal per minute (equals around 454 ltr per hour). This would be your pump pumping 454 l/hr @ 60 psi line pressure out of a 5/16th fitting with zero excess fuel being returned…100% usage. Obviously not the case since we would be out of gas after driving for a few minutes. So the next logical question would be “How much fuel volume do I need at idle…How much fuel volume do I need at WOT?” Anything your pump is pumping in excess to these answers is being bled off (currently) back in the basket. For a stock GEN-II @ 450hp, a calculator estimates your fuel usage on stock injectors will be 160 l/hr at WOT @ 55PSI fuel pressure. You can see the factory system does just fine supporting this demand signal. Bump your HP up to 700 supercharged, the calculator estimates your fuel is now 270 l/hr @ 55 PSI with 43 lbs/hr injectors at 80% duty cycle. Hit 700 hp normally aspirated, your fuel needs are 240 l/hr @ 55 PSI with 39 lbs/hr injectors at 80% duty cycle. Just a few calculations to ponder as you dream about upgrading your fuel systems.
https://fuelinjectorclinic.com/flow-calculator
https://www.google.com/search?q=cc+per+min+vs+ltr+per+hr&sourceid=ie7&rls=com.microsoft:en-US:IE-Address&ie=&oe=&safe=on&gws_rd=ssl

[J TNT]

Any updates on how well the pump works ?

Thanks .