ive noticed that almost everybody on the forums has upgraded to a walbro fuel pump but my question is (remember im a newb so be nice lol) why? i mean i know to push more fuel but how unefficient is the stock one? also how far can the stock injectors go before you have to upgrade them to? im just tryin to understand a lil more cause im thinkin about ungrading to one but im also curious as to what kind of hp increase i would get with a better pump after i get tuned with it?? sorry for the newb question but the search wasnt helpin me much, thanks

 

If you dont plan on running more boost than stock and adding cams you will be fine, but run more than 21 psi and your gonna want to have it.

 

well i was tuned at 22psi but i installed a larger fmic and hit boost cut so i turned my boost down a lil but otherwise you dont think its necessary?

 

dude put it this way

it's a 76 dollar mod

to ensure your motor gets adequate fuel

any other questions?

 

+111 what he said

 

A higher volume fuel pump keep air/ fuel ratios consistant by flowing more gallons per minute. 255 GPM.

Under wide open throttle, the injectors are squirting fuel, hopefully not using a 100% of their capacity. Fuel pressure drops if the pump cant feed the motor enough fuel under heavy load. Having a nice strong pump will keep up the optimal fuel pressure in turn making your tune, and the car run consistantly.

 

Its 225 litres per hour, not gallons per miniute, do you know how much 225 gallons per miniute is, you could put out a forest fire with that ****.

 

Where can we find one for $76?

 

they were on sale in the vendor forums for a while if not anymore they'll be 89 or 99 bucks

still under 100 bucks to prevent your engine from going KABLAMMMM

you can't really argue that

 

hopefully this will help you out with the evo 8 fuel pump deficiencies:

https://www.evolutionm.net/forums/sh...d.php?t=256499

i will be expanding this research as i am in the process of buying a better data aq system with more sensors.

 

its safer for boosting higher and it really helps with a tune..nothing really hp wise unless u get a tune with high boost

 

GPM rofl

 

Who knows the actual difference between the VIII and IX pumps?

 

I heard that the stock Evo VIII pump is good up to 300whp.

I think that Evo VIII is around 190lph and Evo IX is 230lph.

 

The stocker can't take a 35 shot of nitrous and 16 pounds of boost at the same time, thats for sure. Lower than stock boost laugh out loud.