SKY888

So here's my set-up to get enough fuel for 80 lb/min:

ZZP stage 1 cams w/ big fuel lobe
WERKS custom intake manifold w/ bungs on each runner
Nitrous Express SAFE fuel system (w/ FPR and fuel pump)
4 saturated RC injectors 42 lbs
RMR -8 fuel rail, brackets, and bungs
SPLIT Second additional injector controller
Deatsch Werks 300lph lpfp




















I'm hoping that this set-up will be enough.

If you guys have other recommendations and suggestions........pls let me know. Thanks!



The NX safe system will hold the fuel that supply the secondary port injection. Since I decided not to tap from the main tank/gas line....

jonathan923

iTrader: (2)

subd.

RoadconeTuning

idk if a set of 30lb injectors on top of everything will support 800ish hp... I think you'd need atleast a set of 60lb injectors, remember, guys run out of fuel on LSJ's with E85 on a stock blower... also, RC injectors are 100% crap compared to whats available now...

They do have a somewhat useful calc to figure out fuel needs tho lol
RC Fuel Injection

RyRidesMotox

All the LSJ guys have to do is put in a set of 80lbs injectors and they are good for E85 I think. By the way I think I have heard about this build from a buddy of mine that has a Sky Redline. Sounds epic, good luck.

Another option might be to take the HPFP and injectors to a high performance diesel shop. They should have the equipment to port out the pump and injectors to increase flow. I am going to be getting a broken HPFP to give it a try myself when I get the cams (hopefully this year). I'm hoping that a combo like that will allow me to flow enough air for a Precision Turbo 6262 for 600hp

SKY888

but the LSJ guys only rely on the set of 60 lb injectors.

With the LNF engine.....both DI injectors + 42 lb port injectors will be combined especially during high rpm/high boost. I am really hoping that they'll be enough for my set-up.

I believe ZZP and some of their customers have been using their stage 1 cams w/ big fuel lobe plus a single injector, that satisfies their cars that have 600hp range using E.


Im afraid of using bigger port injectors (60 lb and higher).......because they might be too big for my application, and if I spray using their minimum setting, fuel will not be atomized to its potential....causing tuning issues.

Unlike smaller injectors, they'll be sprayed to their mid-high setting, and fuel will be atomized better, and easier to tune. But if there is still some lack of fueling, I can just upgrade to bigger injectors later on....


But I'm not an expert here. It's nice to know more about what you guys think.

Thanks for the help

SKY888

who's your buddy that has a sky redline?
he belongs to skyroadster forum as well? username?
thanks!

yeah, a couple of members in this forum have mentioned about porting out the hpfp via diesel shops. But nobody has done it yet. You might be the first one doing it. If it works, that will be awesome! Pls dont forget to let me know how it works out for you.

I forgot to include on the list that I also upgraded my LPFP to a Deatsch Werks 300lpf pump

BLAZIN07SS

iTrader: (7)

one of zzp's customers cars runs 1 additional 60lb injector, yes just one with a separate injector driver, zzp's upgraded HPFP and stage 1 cams with upgraded fuel lobe. car made 551whp on full e85

SKY888

thanks for the detailed info!

yeah, so if that set-up has an additional single 60 lb injector w/ s1 cam w/ big fuel lobe and able to make 551 whp, I'm hoping that my set-up up will work.

4 x 42 lb injectors will produce 164 lb fuel injection.

so we'll see!

*crossing fingers*

RyRidesMotox

It's Fortunato. 40rty on skyroadser.com I think. I am helping him with tuning. He is also doing a turbo swap with cams and such this year.

And there are a few I know about that are running around with a 'massaged' HPFP but I'm not sure if they are on the forums here

cmiller8006

iTrader: (3)

Yea thats shythe snake, I am ordering mine right now actually. Going full E in spring.

jonnymerk

I have 72's and I'm only at around 40% IDC lol. You'd be surprised to find out a lot of times your don't need as large injectors as others say you do.

I thought I needed 80's only to have my tuner say...those are nice hope you got the receipt

SKY888

oh Forty!

I wish, those people with "massaged" HPFP would give us some info and feedbacks......

SKY888

that's what I also believe in.

and that's the reason I picked 42 lb injectors.



I originally received a set of 70 lb injectors.............but I was able to exchange them with 45 lb injectors...

BLAZIN07SS

iTrader: (7)

bet you he had the idc pid still set for a v8

stonny9

Maybe he has a stock pullied m62 lsj with a 6500 rpm limit

RooTBeeR

iTrader: (4)

fat injectors

SKY888

any more technical inputs are welcome!

taintedred07

iTrader: (1)

Bump for more info/results

Nfamous60

iTrader: (11)

Sshould have been done over a year ago..

taintedred07

iTrader: (1)

Has anyone done this with the stock intake manifold?

SKY888

I believe ZZP did the port injection using the stock intake manifold a year or so ago.


my set-up is pretty much the same as stated on the original post minus the small fuel cell (1 gallon).

I ended up using a custom 3.5 gallon fuel cell instead.

noorj

iTrader: (17)

are you going to be using e85 or race gas?


I think the 42s will give you enough fuel for around 85ish lb/min on race gas, not ethanol tho

taintedred07

iTrader: (1)

I'm going to be on full e85. I'd rather do this with the stock manifold though than just the 5th injector.

Matt M

For max power on an LNF, it is typically best to start mixing in race gas rather than running E85 only. The reason is due to the injection window. With DI, you can make more power by running a shorter injection pulse even when the resulting afr is exactly the same. For example, if your IDC is 40%, even if you are not getting any misfires, you will make more power if you run larger injectors and get the IDC down to 35%. When we were going for max power on my car, the di injectors were at 40% and the 80lb 5th injector was maxed. I ran 3000psi fuel pressure at high rpms and kept lowering the ethanol percentage as I raised the boost. With C16 used to dilute the ethanol, we were down to ~55% ethanol and an overall octane of more than 110. This allowed the fuel system to supply enough to get the job done.

Nfamous60

iTrader: (11)

as technical as dat was i actually understood