I am installing my S trim (6-7psi) with an alcohol injection kit. I have Accel 48lb/hr injectors. I have a Walbro in tank pump sitting in a box. My question is can I install an inline pump instead and keep the stocker in the tank, or does that defeat the purpose. Cqan I use a 255lph inline to support 450-500rwhp?

 

I need some opinions guys...trying to get my parts together for the install. Anyone using one pump (intank and inline), anyone using two pumps, etc. What kind of power levels were you guys running with your pump setups?

 

I would highly recommend ditching the stock intank pump and installing a Walbro 255lph intank pump. I would also look into a Racetronix hot wire kit or a Kenne Belle boost a pump.

 

I have the walbro intank, but you think I need an inline as well? I should match them too right? Like 255 intank and 255 inline? Thanks for responding.

 

Put the walbro in. I just cut the sheet metal to the tank, I can replace fuel pump faster than plugs now. No point in shorting fuel.

 

Do the Walbro, the external booster pumps are loud and annoying.

 

a tuner I know that owns a mustang dyno says the Vortec T-Rex inline booster pump added to a stock intank pump will be good for over 500rwhp. The only time when the booster pump will not work with the stock intank is if the lines on the stock pump are not big enough resulting in poor fuel flow. Other than that he says it should be a pretty solid system for under 500rwhp. They aren't that loud either. The T-Rex pump is however $200 so you might be better off just getting a single huge pump

 

Listen to this man. I supported 733rwhp with a 255lph in-tank, BaP, stock lines/rails/and regulator. Don't make it more complicated than it needs to be.

Rich Krause

 

OK, so I should be good if I use a 255lph intank and thats it. I''ll see how it performs on the dyno, and if I am running lean up top, then I'll do an inline as well. Thanks guys for all the input.

 

I am pretty sure you will not need an inline pump. The 255lph will be more than adequate for your setup. For example, I am running twin 255lph (with slight modifications)intank pumps and am pushing over 700 rwhp without any issues. Unless your car really needs it there is no need to overdue it on fuel. Is this a stock bottom end motor?

 

Yes it is. I am at 383rwhp on motor, and should see 450-480rwhp with 6-7psi, so my hp levels arent huge. I just wanted to make sure I dont need to spend the extra cash right now. i will intsall the Walbro intanker I have.

 

You'll be spending lots of extra cash pretty soon. Bwa ha ha ha ha.

 

Really!

Once the ball starts rolling downhill and gaining momentum, it's very hard to stop. I started with a blower and a cat back on an otherwise stock car. Great combo! Now, it's much easier to list what is stock than what's been modified on my car. It's still a lot of fun. But it's apart more than it's together. I am tempted to buy a stock F-body to drive just for fun!

Rich Krause

 

I hope your not referring to a new bottom end . I should be ok for a little while. I have been modding this car for the last 2 years from heads/cam to gears to bolt-ons to a new clutch. Most people would be happy with 383rwhp on motor, but not me. I remember when I had a CAI/catback/free mods and I hoped to run high 13's. I ran 13.9 @ 100mph. Then I got full exhaust and 3.73's and said "I'll be happy when i run a low 13", I then ran 13.3 @ 105.8mph. Then I did heads/cam and said I'd be happy with a mid to low 12, but without traction I ran 12.5 @ 114mph running pig rich. Now I want to run mid to low 11's on dr's with 6psi. We'll see if its possible.