injector size fuel delivery 35r

[turbotalon1g]

^^Cause that's what all the new guys wanting 600whp do?

Where is that askhole picture that you use? I'd use a kaboom but its not the right time.

[4seasons69]

Awesome everyone is sucking aaron off here for flaming me and never once gave any real advice, just trying to piss people off cause he a h0m0 online...

I understand I may need to go bigger than 1450, no problem buying 1650, or if I had to 2150, but no one has given any help on why....

Someone try to answer the question. What is the math behind turbo and injector or fuel....ANYONE?

Um there is lots of good legitimate real advice in the first page of this thread. There isn't any special equation that says your turbo flows x amount so you need this specific injector for that turbo.
injector size is more determined by the type of fuel you want to run and the amount of power you want to make. If you want to make a certain amount of power on a given fuel you're going to need enough fuel to support that power.

E85 requires more fuel to be used and you want to make some serious power so you are going to need some pretty big injectors. 1450s might be able to support 500whp at db but when 1650s are only $40 more why wouldn't you run them? Especially since 1650s have proven to be able to support that much hp

[goodhart]

Guy, you got how many posts of people telling you what to buy, yet you are on here now pissing and moaning about not getting any good advice. :nope:




http://www.jumpoverthere.com/wp-content/uploads/2012/07/askhole.jpg

[goodhart]

Yep, no good advice in here... :jackoff:



I'd say you'll need FIC 1680's or the 2150's.

You will definitely need either a BAP on your 255 and maybe a second pump or a bigger base pump (like the Walbro 400). This is where you get to spend a lot of time researching other people's setups and then decide what you want to do, then spend money and more time making it work. :)


For sure twin 255s or the wally 400, I'd do a hi-z 16xx if pump or 2150 if E85.



^ What he said.


Since you're going with e85 I would just go with the 2150's and be done with it.

You will also need a second 255. Not sure if one walbro 400 would support 600 at db probably with a boost-a-pump it would.


Might need a bigger turbo.


They don't make a low impedance 2150. At least that I'm award of. But as Shane said you may need a bigger turbo to hit 600hp at DB even if you max the turbo out. Finding link right now of proven setup as yours is going to be very similar to Brads.

I think he did it with a required 255 and boost a pump but maybe I can text him so he can chime in.

Ninja edit:

http://www.mitsustyle.com/forums/showthread.php?t=20970

If you can't shell out for the 2150's right now you could start with 1650's and see how far you can go on those. The previous owner of my car on a gt4294 made 651awhp at db with 1650's and twin ford gt pumps(ford gt pumps are very similar to the 255). so you can take 1650's pretty far but I would still recommend 2150's.

A 2.4l won't change the injectors you need. Just because your turbo is a 65lb/min turbo doesn't mean you are going to need 65lb/min injectors. Injectors are actually usually rated in cc/min or lb/hr. So if you convert 2150s to lb/hr you would have 204.8lb/hr. The size of the injectors is based on the type of fuel you are going to run and the amount of power you are going to make. E85 requires more fuel so you will need bigger injectors.

Like I said you can probably get by with some 1650s but someone can correct me if I'm wrong from my understanding the 2150s are more tuneable. You end up with better idle quality and driveability with 2150's vs 1650s.


With that turbo, 1650's should be enough. I ran an s362 with 1600's and twin 255's on e85 at 35psi, made 541hp at DB. 1650's should be fine for that turbo setup.

[Halon]

I would not recommend the old 1600's if you care about consistent drivability. Size wise they're fine, but they aren't the greatest for drivability.

If you'd rather use an online generic sizing calculator then here ya go:
http://rceng.com/technical.aspx?UserID=19105451&SessionID=YwFMdt6xgYyAslJPYjew

The generic numbers I use for BSFC are gasoline 0.60, E85 0.85.

[Shane@DBPerformance]

I have good formulas I use for determining injector sizing based on HP output to the wheels, dyno type, 2WD vs AWD, # of cylinders, general VE of that type of motor, fuel type, base fuel pressure, max duty cycle, and peak HP RPM.

[dsmreck]

lol do I get an askhole cookie. OK i'm actually starting to get somewhere. I could prob go 1450 but wont max turbo out but will most likely not have and drivability issues...

1650 more power more issues. not sure how bad the issues will be yet...

or 2150 guaranteed to give all the fuel I need deff over board, twice the cost. Do these tune with zero issues?

I think i'm going to go 1650. I will make plenty of power to satisfy just about anyone, and it sounds like shane has no problem trying to make a good tune with them. Map tells me not to get them cause of the known dead spots. Hope they aren't too bad.

Maybe someday I can join the big boys in the 2150cc club, but prob not now unless someone has a good used set.

[turbotalon1g]

I have 2150s because they make me feel cool, but it's effects have run out already.

The old 1600s suck, get hi-z injectors I thought I heard rumors of them coming out with some mid sized one's soon.
The old 1600s would have a weird cruise miss, but I got them to idle perfect with BC 280 cams and idle at 950rpms.

[CornFed2.4]

My 1600 would hiccup cruising but that was the only issue. Idle everything else was fine

[dsmreck]

lol doubt you feel cool turbotalon1g but I do now know why you recommend them as I hear they have no tuning issues.

High z do sound nice and all but I just found some bluemax 1650's on the used and i'm just going to try them...

Shane says there could still be idle and part throttle hiccups with the 1650's as well, but for now as long as they are not complete crap I'm sure i'll be more than happy...

I do appreciate all the help so far, it's just been a tough decision for me, and I really want to learn something here not just buy parts....

So who wants to help an askhole get a tune for the injectors and SD good enough to daily a few times and get me 3 hours to db?