When to change injectors and pump?
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Evolving Member
Joined: Dec 2003
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From: bartlett
When to change injectors and pump?
I'm putting on a turbo back exhaust, boost controller, fuel computer, intake. I plan on running 20-22 psi
Should I also upgrade the fuel pump and injectors, one of the two, or leave the stock equipment? Also what size injectors?
I've heard that the stock fuel pump fails under high stress but i lso heard it is rated high for a stock piece.
Should I also upgrade the fuel pump and injectors, one of the two, or leave the stock equipment? Also what size injectors?
I've heard that the stock fuel pump fails under high stress but i lso heard it is rated high for a stock piece.
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Joined: Mar 2004
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From: Your moms house
I have heard the same for the stock pump. Apperntly it's a awesome piece until you stress it for an exteneded pierod of time. I have been logging my runs with a ODBII logger and I haven't been running lean according to my O2 but, then again I really don't trust the O2 reading.
Fuel pump is going to be my next mod just for as a safety net
Fuel pump is going to be my next mod just for as a safety net
Yes, to make a long story short, it's a general consensu to get a fuel pump for insurance....cheap insurance @ that...you don't want the stock pump to fail and all of a sudden go super lean....in terms of injectors, you have no need for them as of now with ur mods.
Originally posted by tama_mog
...you don't want the stock pump to fail and all of a sudden go super lean....
...you don't want the stock pump to fail and all of a sudden go super lean....
fuel pressure sensor
Does the EVO8 computer have any sensor that sends it both the fuel pressure the rail is seeing, and the battery voltage the system is obtaining?
Does the computer adjust the injector pulsewidth based off of the voltage conditions, and/or the pressure regulation?
Thanks,
Joel.
Does the computer adjust the injector pulsewidth based off of the voltage conditions, and/or the pressure regulation?
Thanks,
Joel.
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These opinions are pissing me off. I am getting tuned next month and I was told to upgrade the pump unless you are completely stock. I have just a few bolt ons and it seems overkill for me to put it on, especially with people running pig rich after installing it and it making noise. I have not seen one single case of a pump failure that would warrant the new pump. I have bought too many things in life that have been a waste of money and I don't want to **** another hundred away.
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Joined: Jan 2003
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From: NR Reading PA
Here is one opinion. I pulled this from a 5 page thread in the dynoflash forum.
https://www.evolutionm.net/forums/sh...threadid=66639
Speedlimit...
https://www.evolutionm.net/forums/sh...threadid=66639
Speedlimit...
Originally posted by DynoFlash
I am advising fuel pump upgrades because under hgh stress conditions - e/g long dynp pulls at high boost or long repeated street pulls in high temp locations, I am seeing a large perentage of stock pumps which will suddenly start flowing significantly less psi of pressure as they get hot
The Walboro not only flows more, it is more consistant in high heat, stress situations
If you have a current dyno flash and switch over to the walboro pump your cvar will operate fine - however there is a slight possibility that it may run too rich in the high rpm range
This is especially the case for people who have had custom tuning and where we had to put in more injector duty cycle on top to maintain a/f ratio
The bottom line is i would rather have you put the pump in and possibly run a bit richer than run the stock one this summer - have it overheat and wind up with 13.0 a/f's and a hole in your piston fromj a failed fuel pump
I do NOT make $$ from selling pumps
I am ONLY posting this info so that my valued customers will not have any problems with their dyno flashed cars
When we suspect something - we observe it - - it is only after we CONFIRM a FACT that we made a warning or advisory
I have been suggesting fuel pumps for months - based upon my time with tuing turbo cars and genereal prudent advice
Now I have seen two pumps go bad in two cars in a row in 85 degree heat so I can tell you the pumps need to be changed
BTW - in both cases - the pumps were immeditely changed and the fuel flow was immediately retored
I am advising fuel pump upgrades because under hgh stress conditions - e/g long dynp pulls at high boost or long repeated street pulls in high temp locations, I am seeing a large perentage of stock pumps which will suddenly start flowing significantly less psi of pressure as they get hot
The Walboro not only flows more, it is more consistant in high heat, stress situations
If you have a current dyno flash and switch over to the walboro pump your cvar will operate fine - however there is a slight possibility that it may run too rich in the high rpm range
This is especially the case for people who have had custom tuning and where we had to put in more injector duty cycle on top to maintain a/f ratio
The bottom line is i would rather have you put the pump in and possibly run a bit richer than run the stock one this summer - have it overheat and wind up with 13.0 a/f's and a hole in your piston fromj a failed fuel pump
I do NOT make $$ from selling pumps
I am ONLY posting this info so that my valued customers will not have any problems with their dyno flashed cars
When we suspect something - we observe it - - it is only after we CONFIRM a FACT that we made a warning or advisory
I have been suggesting fuel pumps for months - based upon my time with tuing turbo cars and genereal prudent advice
Now I have seen two pumps go bad in two cars in a row in 85 degree heat so I can tell you the pumps need to be changed
BTW - in both cases - the pumps were immeditely changed and the fuel flow was immediately retored
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