RotaryRevolution

I have a power fc, intake,downpipe, and full 3in exhaust, would it be a nessecary to upgrade my stock fuel pump and would i also need new injectors if i did?

vosko

go for a walbro pump it never hurts

rotary speedster

I don't think you are in need of upgrading. From hear say the stock fuel system is good up to 350-400rwhp, tuned correctly of course. But, it sure won't hurt anything. No you don't have to upgrade the injectors at the same time you upgrade the pump. I got the Supra TT pump. Its a dritect drop in replacement. Took me 30 minutes to change it out.

RotaryRevolution

thanks for clearing things up

Mazdabation

So whats the difference between say the Walbro or the Supra TT?

jspecracer7

price and LPH(liters per hr). Walboro is cheaper and flow more. Some people have had problems with the walboro however(don't know of any in person). Supra pump's also pretty damn expensive when compared to the walboro unit.

jackdhammer

I would upgrade it now. I just blew my motor and they (rotary reliability and racing) think it would have helped if I had an upgraded fuel pump. I have about the same mods as you. Just my 2cents.

suprfast

i dont know if i still have the part in my signature, but i have the hookups on fuel pumps. i used to work at a toyota dealership and supply them to the rx7store. i have sold many on here as search would have yielded. if you want a TT supra let me know. last i knew i was still getting them for 165 + shipping. its a few bucks more than the walbro and you get piece of mind. maybe the walbro is good, but i heard enough stories about it. PM me, or email me with a heading of SUPRA TT fuel pump if you want one. payment is sent directly to the dealership so there is no middle man making money, im just helping my buddy that still works there.

let me know, suprfast@pacbell.net

kris

ccarlisi

According to the fuel calculator on Maxcoper's site the max of the stock fuel system at 88% duty is 308rwhp, not 350 as someone else posted (no offense to that person). This calculation depends on what A/F you are running also. The leaner you go the less fuel you need to produce the same HP. Therefore, it may be possible to get 350 out of the stock system but I doubt that would leave you much headroom.



http://www.maxcooper.com/rx7/how-to/fuel_s...stem/calcs.html