???'S About injectors and sfmu with boost

[E-CLIPS97]

I have a couple of questions. 1st, with 310cc injectors, what would the max boost be that would be safe to run? 2nd, I have heard and read that with the vortech sfmu, you should stick with the 12:1 disk. I am assuming that would be with stock injectors. Would it be necessary to change the disk with 310's?

 

[jayden1]

those injectors would only be good for about 200 horse. Why would you want to change the disk.

 

[Turbo 420a]

Originally posted by jayden1
those injectors would only be good for about 200 horse. Why would you want to change the disk.

310cc injectors are actually good for quite a bit more then 200hp. I have been using 310cc injectors to fuel 10-12psi (roughly 250 wheel hp) of boost and I even run rich still. I wouldn't go beyond 12 pounds of boost with 310cc's. I'm going to need larger injectors before I will feel comfortable boosting any higher.

Forgot what disk size I am using for my SFMU. I found the right disk for my setup by looking at the fuel curves provided by Vortech for each disk. Then I used the disk that looked most suitable to match my powerband.

 

[jayden1]

well i went with a formula there 310 cc for boost doesnt seem like a lot of power. http://www.rceng.com/technical.htm

Check it out for yourself at that sight

 

[Turbo 420a]

Hmff. I must have a set of magical 310cc injectors then

All I know is they flow the fuel for me, and then some (running rich). Just no more then 12psi.

 

[jayden1]

Maybe a fuel computer would help. Or do you already have one.

 

[Turbo 420a]

Originally posted by jayden1
Maybe a fuel computer would help. Or do you already have one.

I don't think an electronic fuel controller would help me (or other 420a's at similar boost levels) much, if at all. I've been able to tune my fuel system exactly how I want it with the S-FMU. It really is a great FPR for the money. Who knows, after some dyno pulls I might find out that I do need extra fuel control - I doubt it though.

 

[Flamineclipse]

The ecu for the 420a will idle 310's without additional support from a afc or other piggy back controler. And tons of people are using them for up to 250 hp and maybe a little more. But I agree, I would run more than 10-12 psi on them.

 

[jayden1]

damn well thats a good thing cause if i can run 250 horse on 310cc that help me out. I was planning on buying some like 650cc injectors cause i was going buy that formula. so will 36lb injectors be good for 300 hosrse. I gonna have the boost at 3 psi until i get an intercooler, the shop i had my head intake exhaust manifold work done at said by the cfm the stock head flows compared to what it flows now 3 psi on my car will be like 6 on an eclipse with the stock head and intake manifolds. I got my turbo just gotta finish putting the engine back together.