maxgee

iTrader: (5)

I have 42lb injector which is actually 48 or so with ls1 fuel pressure. I tried e85 on my turbo set up and it ran HARD!, but my injectors where way maxed out. Based on the inj duty cycle at 161%, what size would I need to get?
i have a turbo set up with 8psi boost

nahasapeemapetalon

iTrader: (9)

prly 60's go to the stickiesand calculate it

maxgee

iTrader: (5)

it's a little more complicated. e85 requires 30 percent more fuel, does this mean i need an injector to run at 50 percent duty cycle?

108dragon

iTrader: (5)

Check out http://www.rceng.com/technical.aspx?...Injector_Size_
I'm not certain this will help with picking injectors for E85. But it should get you in the ballpark.

405HP_Z06

iTrader: (11)

Your going to need 80 lb/hr @ 3 bar to use E85.

Like this

Here's the calculation:

maxgee

iTrader: (5)

thanks 405HP
i'm going to order the new ford 80lbs with the uscar adapters.

405HP_Z06

iTrader: (11)

Shoot Rich, FICINJECTORS, a PM. I know they were running a sale. At the very least, you'll get some of the best pricing around.

ElectronSS

you could get away with using 60s at 8 psi. if you plan to step up then youll need larger injectors over the 60s.

405HP_Z06

iTrader: (11)

How do you figure that......maybe with gas, but not E85.

ElectronSS

that chart shows it needs an injector capable of 79lbs a 60 at base 58 is 72. up the base pressure and you have your 79s. not mention an increase in fuel restriction will net a lower duty cycle on injectors. see how there are few ways around that? 60s have been good for much higher psi levels. i run 60s on 9psi with a 60/40 mix of 93/E85 and my duty cycle isnt no where near as high as his

ElectronSS

now i seen this post of yours and it states what i posted saying 73lb injectors good for 700hp on E85. a typical boosted motor on 8 or 9 psi isnt going to make that much powerso with that being said what is the right calculation your going off

405HP_Z06

iTrader: (11)

The injector size recommendation is @ 3 bar and compensates for the actual 4 bar used. I'm going off of the estimate I posted earlier in this thread.

Shoaf85

iTrader: (9)

I am running E85 w/ 60lb injectors at a base f/p of 65psi and I make over 600 rwhp @ 92% duty cycle! I also have a twin pump set up with a -8 feed!

maxgee

iTrader: (5)

i assume then you are running an adjustable fpr? also, how much boost are you pushing?

LilJayV10

iTrader: (39)

I spoke with Nate at Nasty a few weeks back asking this exact same question.

Later this year I am wanting to do a single TC76 turbo, stock bottom end w/ E85.

Nate said that his stage 3 street kit w/ 60lb injectors would be fine. I would be running 8-10 psi. His kit does come with a regulator w/ boost reference.

maxgee

iTrader: (5)

might be getting the 60lb injectors and adding reg w/boost.
i'm trying to keep the cost to $500 so this setup herehttps://ls1tech.com/forums/6703927-post5.html might be the route I take.

vaticano

iTrader: (8)

You should just get the 79-80 # injectors for increases in boost. It will save you money in the long run.

Not much help but usefull knowledge, When I first converted to E-85, I only had 42's, I saw a duty cycle of 220% and an AFR of 14:1 at 6000+ rpm. I got no knock or KR with 18-20* of timing at wot.

maxgee

iTrader: (5)

wow, i had an AFR of high 13s, e85 is a lot more forgiving.

what size injectors are you running now?

vaticano

iTrader: (8)

Yes it is.
I currently have 79# injectors from racetronics. But I live at 5800 feet and require 20% less fuel than sea level. So far they work well, but I'm not sure what kind of duty cycle they are at. As long as the AFR is good I havn't checked.

Shoaf85

iTrader: (9)

Yes he is right if you plan on making big power with E85 a bigger injector over 60's will be required. I am only running on E85 while I'm on the stock bottom end because my compression is so high. After the engine is put in I will do E85 for a street tune and then a Q16 tune for the track and the 60's should be enough for near 800whp with Q16!