Hey guys (and gals) I've researched my butt off and just do not have the funds to drop on a big horsepower fuel system. I want to get the car running this year to see what needs to be upgraded over the winter and to find the weak points.

My new setup is a LQ4 (basic upgrades) with an 88mm turbo (.96AR)

I am looking to only run this at 10-12 pounds and I will buy the HP Tuners software over the winter so I can learn to tune and turn it up down the road once I understand how involved the tuning is. The car will get tuned by a local shop (Straight Line in Joliet Illinois) once it is all together.

I am not running an intercooler as the car is only driven on the weekends if the weather is nice so I would really like to run E85, hence why I am looking at the 450 from Walbro.

I am seeing numbers all over the place as to what these are capable of and I'm honestly not worried about how much it puts down. My main question is, do these easily replace the walbro 255 fuel pumps, or is there modifications that need to be made to fit it. My car is a 98 camaro so I have the steel fuel tank.

I can get the pump for just over $100 which is a bit better than the $600 plus prices i'm seeing for higher horsepower levels. Like I said, I'm not looking to be ultra competitive, but I want to get the car back on the road and then I will go with a bigger fuel system next year.

Any help or insight would be greatly appreciated. Also, any real world numbers you guys are getting on certain boost levels with this pump would be appreciated so I can bring the car to the tuner without needing to have them do extra work while it's there.

 

Yes, swap is simple on the 98' tank hanger. I just have a base tune in mine to drive around, so I cant really say what a single will do. Im on E85 as well & have a 12lb spring in my gate. Hopefully I'll have enough pump to support it at the boost level. Ive heard some guys making 700+ on a single 450 with E85. If I run out of pump, I will just add an inline & keep the 450 for a lift pump.

 

this is exactly what I was looking for. Time to go order the part

 

I was researching this heavily as well. You'll need a regulator, additional line, and an upgraded wiring harness/bulkhead as well from my understanding.

 

i saw the regulator would be fine on the low boost I am planning for this year. I also saw the stock lines would be fine as I'm not leaning on it heavily this year. I believe they come with the upgraded wiring. I will be keeping my 255 OR buying another 450 this winter and doing a twin pump setup, then I'll upgrade my feed and return line along with adding a regulator. But I will definitely keep that in mind and will consider adding it before taking it to the tuner. thank you!

 

The 450's comes with a pigtail you splice in. But the factory wiring is far from ok on that pump. You need to get a hotwire kit & upgrade the wiring to the pump. Ask me how I know lol... And I seriously doubt the stock regulator will be able to control the flow of the 450 either, they cant even regulate a 340 pump much less a 450.

 

any suggestion on a hot wire kit? I bought the pump off of ebay yesterday

here is the kit;
http://www.ebay.com/itm/WALBRO-E85-R...ZcNrvQ&vxp=mtr

 

Racetronix makes a nice hotwire kit, easy to install. But you still need to redo the power & ground from the pump to the hotwire kit.

 

I have the racetronix Hotwire kit and 255 pump that just got delivered. Might end up retuning the pump and going with the 450 for e85 or 400 on pump gas. install seems easy in both cases.

 

To the top.

New FPR, RX hot wire kit, walbro 400. Can I safely run this by upgrading the wires from the pump? Looking to make 500 with boost but if I can do it with a walbro 400 instead of a 255, it leaves room for growth and won't be stressing the smaller pump as much.

Any reassurance this should be ok? Any tips? New at wiring, so any help will be much appreciated.

 

The walbro 450 intank pump work awesome. On e85 over 500 rwhp no issue with boost. Even more with normal petrol

 

Anyone have some good pictures on twin 450 walbros in a 98 fbody? also do you need to change out the bulkhead connector if I hook up twin 450s?

 

Short answer is yes. But there is nothing to change it with. So unless someone has mfg'd a replacement similar to the new and modified bulkhead connector used for the 99-2002 fuel assemblies, you will have to wire the pumps directly with larger gauge wire and then connect into a modified intermediate wire harness that connects to the Racetronix dual pump harness. The Racetronix dual harness comes with the intermediate harness but you will have to modify it to circumvent the yellow bulkhead connector with the wires that are connected to each pump.

Two of the four terminals on the 99-2002 replacement bulkhead connector supplied with Racetronix upgraded hot wire kits can handle 28 amps. Can it be used on a 98? NO. It requires a larger hole in the hat and secures differently to the hat compared to the yellow 98 bulkhead connector..

 

We have wiring solutions for this. Please contact sales@racetronix.com with your requirements.
We recommend twin 255 or 340LPH pumps for F98/99 applications over a single W450 or W525.

 

It's good to know you have a wiring solution.

I agree on twin pumps. To run a 450 LPH or 525 as a single pump means you recycle a lot of fuel when daily driving. Most times a 255 lph is enough for daily driving. When you need the extra fuel as you transition to boost and WOT, engage a secondary pump.