Just wondering how far people typically push the stock pump safely ?

 

340

 

Believe it or not: 500rwhp on my set up,also have fp gauge to keep an I on it.

 

i made 416 rear wheel stock

 

Looks like results vary. I'm nearing 400rwhp n/a stock bottom end 350 and my fuel system is completely sucked dry above 4700rpms. I have 30lb injectors and their running at 90% duty cycle. My fuel pressure drops a pound or two up top. I currently have an inline fuel pump awaiting installation along with 42# injectors. But as you can see in my thread I recently made I'm having issues with just "bolting in" my inline pump.

 

Adding an inline booster pump isn't the way to increase your fuel flow. That's usually used when you want to increase both flow and pressure. Why not just replace the stock pump with a 255 LPH pump?

 

I am in the process of installing the RaceTronix kit... I just wanted to hear what other people were getting out of the stock pumps

 

x2

I'm ditching the inline pump, returning it tomorrow, and looking at a racetronix kit for myself. I'm curious as well...

 

what is the stock pump rated at?

 

I maxed mine out at 360rwhp during the dyno tune and it started to run lean after ~5500 rpm so i had no choice but to swap it out, i would just do it and be safe. I personally dont think its worth the risk!

 

at 330 hp your stock pump should be fine.. i made 416hp with my last engine on the stock pump.

now if you have a dying pump then it may become a problem.

 

made 415rwhp on my stock pump with 37# injectors but started to run real lean after about 5000 rpms

 

I'm not going to make quite that much power, but I'm concerned that my stock
pump may not handle the H/C 383 N/A. (If I ever do N20, I'll definitely have to upgrade)

I'm thinking it might be good insurance since I will be revving it to make use of this cam.

 

my pump on the new turbo setup was running out of steam at 4000 rpm... i am now doing tiwn walbors.. if your worried about your pump you can get a walbor 255lph pump for 99$ on ebay...

 

I am at 412 RWHP and cant detect any ill effects from my stock fuel pump. Pulls hard to 6.5K RPM wih 30# injectors.