650 or 680

[mitsuclipsegsx]

This will be used with PTE BB 50 trim, with a safc 1, does it matter if i get 650 or 680? my max boost will be around 25psi

 

[blcknspo0ln]

No it will not make a difference which way you go. Although the injector sizing will say 650 or 680, depending on the injector, they will flow more or less. The only way you will know is by having them sent out to get flow tested. Just to let you know, my Denso 660's are problem free with my 50 trim at 21 psi.

 

[marq95gst]

Curious. With knowing the flow of the turbo, is there a formula that would tell me which injector (650, 680) would be just right?

 

[blcknspo0ln]

Actually, there is, but I do not know where to find it. I'm sure a quick search will yield results. Besides, calculating a formula for flow won't necessarily yield you the best results for real life applications. Do your research and you will see what type of injectors are most commonly used for X turbo at X psi.

 

[mitsuclipsegsx]

are Fuel Injector Clinic better then PTE or that doesnt matter either

 

[WatchItExplode]

Have you considered getting a set of used Evo VIII injectors?

 

[mitsuclipsegsx]

Have you considered getting a set of used Evo VIII injectors?

what size are they,probaly harder to get those then the others

 

[WatchItExplode]

On second thought they probably wouldn't be big enough for you. They're around 560cc.

 

[andymoraitis]

Actually, there is a formula you can use to calculate how much injector you'll need. You can find the information here:

http://www.rceng.com/technical.htm#WORKSHEET

On a BB 50 Trim, if I was running 25psi, I'd want to keep my IDC's in the high 70's to low 80's (treat that as safe operating range for any injector in order to have longevity) and run 720's. Since you have an AFC, 650-680 is the max you can go before correction goes out of range. I don't envy the timing you'll have though.

Just my .02,

Andy

 

[scottsee]

Kevin (wiseman) has a Excel worksheet on his website that will help. www.POSracing.net

Edit> after looking, he must have took it off. Hummm. If you like you can e-mail me and I will send it to you...

 

[daren_p]

I would go with the FIC 650's over the PTE 680's. Even though the PTE's are rated to flow more, in real world testing they don't. Both FIC & PTE are made by the same company so you would think these 2 injectors would flow the same (PTE just advertised slightly higher as they probably test at a higher pressure) but in the real world for somereson they flow slightly less then the FIC's.

 

[marq95gst]

Actually, there is a formula you can use to calculate how much injector you'll need. You can find the information here:

http://www.rceng.com/technical.htm#WORKSHEET

On a BB 50 Trim, if I was running 25psi, I'd want to keep my IDC's in the high 70's to low 80's (treat that as safe operating range for any injector in order to have longevity) and run 720's. Since you have an AFC, 650-680 is the max you can go before correction goes out of range. I don't envy the timing you'll have though.

Just my .02,

Andy

Thanks for the link.