evo3 16g w/ 550cc's need help

[L'ville]

Okay i got the evo3 16g and i already bought 550cc's (my mistake!) about how much boost can i run with the 550's also i am planning on using the evo8 fuel pump which is suppost to be a 160lph fuel pump do i need a fpr with it? if yes then which fpr is suggested?

 

[overdoseheroin]

Okay i got the evo3 16g and i already bought 550cc's (my mistake!) about how much boost can i run with the 550's also i am planning on using the evo8 fuel pump which is suppost to be a 160lph fuel pump do i need a fpr with it? if yes then which fpr is suggested?

i wouldnt use the evo fuel pump. 160 isnt enough. if you want i got a walboro 190 ill sell for cheap. the 190 will over run the stock fpr, an aftermarket one isnt totally necessary. its still good to have but not absolutely needed. if you do get one tho get the aeromotive. its about the best 1:1 fpr available.

 

[JessesTalon]

i wouldnt use the evo fuel pump. 160 isnt enough. if you want i got a walboro 190 ill sell for cheap. the 190 will over run the stock fpr, an aftermarket one isnt totally necessary. its still good to have but not absolutely needed. if you do get one tho get the aeromotive. its about the best 1:1 fpr available.

get a AFPR and a walbro 255 hp fuel pump.. they are so cheap just do it...

the injectors should be fine for under 20psi... just make sure you have a logger and are able to read injector pulses and duty cycle

make sure you have EGT gauge to watch for going lean as well...

 

[2gGSX]

Supposing your fuel pump is rewired, it will provide enough fuel for your 550's to run at 100% IDC. You may need to run an AFPR even if your fuel pump after it's rewired, so if you do experience problems then get one. After running a regression with the data from both the Evo 8 and the Evo 8 rewired fuel pumps off a complied table, a rewired Evo 8 pump is enough for about 26 lbs of boost (69 psi fuel pressure) for 100% IDC on 550cc injectors.

At 100% IDC your injectors will flow 3.6828 lbs/min of fuel assuming .76 specific weight (pump gas). Thus, you can estimate how much airflow you can support by multiplying that number by the air/fuel ratio you plan to run; for example, at 10:1 you will be able to support 36.8 lbs/min of airflow and at 11.5:1 you will be able to support 42.35 lbs/min of airflow.

If you log your airflow you can just adjust your boost until you get near your maximum theoretical airflow at a specific AFR that you tune to.

 

[BlckTalon]

Just out of curiosty, what size injectors would be good with that setup? Thanks.

 

[2gGSX]

Staying with an Evo 3 16g, 660cc range (pump gas). There are definitely ways to max out an Evo 3 on 550cc injectors, such as higher base fuel pressure or race gas.

 

[Turbo Talon DL]

I have my Evo 3 going on my car right now. I'm kinda disappointed in buying it, but it was a good deal, but kinda excited about what I hope to be a better turbo than the 14b. Im in college, so thats where all my money goes. I should be ok running the stock WG actuator to control boost, right? I'd have a fuel pump in, but no FPR right now. Send me PMs too, its easeir to get the replies.

 

[EclipseGSX012]

i'm doing 6bolt swap with Evo III turbo and fuel i'm going to use 550cc fuel injector, walbro 255lph HP fuel pump and rewire fuel pump, AFPR. I have asked alot of ppls for their opinion and you will get mixed answer since some say you'll need 550cc or 660cc. I actually asked www.dsmotorsports.com since my swap is going to be at their shop and they told me 550cc is enough.

 

[rowlex]

There are definitely ways to max out an Evo 3 on 550cc injectors, such as higher base fuel pressure or race gas.

LESS fuel is actually required in both those situations at the same boost level(s).

 

[2gGSX]

That is what I said, you can support the same airflow with less fuel, effectively letting you support higher airflow than normal.

 

[rowlex]

That is what I said, you can support the same airflow with less fuel, effectively letting you support higher airflow than normal.

AHH ok I get it now

 

[allgripnoslip]

i actually have 2 evo8 fuel pumps. they flow about 200lph when rewired. They were tested by RRE: http://www.roadraceengineering.com/fuelpumpflowrates.htm

when rewired the evo8 flows 201 lph and the walbro 190 flows 208 lph.






Seems like the evo 8 fuel pump works great for those of us who dont want to upgrade the FPR One is for sale and one i am going to be keeping.

 

[marq95gst]

i wouldnt use the evo fuel pump. 160 isnt enough. if you want i got a walboro 190 ill sell for cheap. the 190 will over run the stock fpr, an aftermarket one isnt totally necessary. its still good to have but not absolutely needed. if you do get one tho get the aeromotive. its about the best 1:1 fpr available.

On 550ccs run 18-19psi on pump gas. Safely.
The 255 pump will overrun the stock fpr. The 190 pump will not. At least my 190 does not. (One source...Check up on the Road Race Engineering 2g upgrades. You install a 190 fuel pump, but do not need the regulator for that size.)

 

[LRS95TSI]

i personally think 680's or so are too much. unless im doin something wrong, with my 680's i am around -36 to -43 on my safc2 between 19-21 lbs. i would personally limke the 550's so that my numbers were better on the safc2 where i had more room to play with. but im not tuning expert. just use wbo2, safc2, pocketlogger.