BlackNiteWS6

iTrader: (2)

I'm almost ready to start building my low compression, 383 stroker, 12# D1SC setup. I'm looking at the LS1Speed complete fuel system. Since it uses a return setup with a boost ready fuel pressure regulator what size injectors should i go with? When i based my setup around 700rwhp and using the .75 BSFC for blower setups i came up with 60bls injectors based on 60psi fuel rail pressure. But if the new fuel system raises pressure based on boost will i need to run a smaller injector? I just want to see what everyone thinks and what they are using. P.S. I still plan on running my TNT kit using a 50hp shot.
Thanks,
Den

NA$TY-TA

iTrader: (21)

72#ers nothing smaller.............. In another thread we were discussing that the power it takes the motor to spin the blower is not in the equation so it needs to be added into your HP configeration....... so you would need a Injector big enough to support 900RWHP to support your 700rwhp to the wheels.... hope you under stand.... ill find the link to the other thread for ya. Oh what pulley setup are you running???? SDCE????
Kyle

NA$TY-TA

iTrader: (21)

Here ya go.... 3rd page after my question about MM.

https://ls1tech.com/forums/showthrea...=201606&page=3

Kyle

BlackNiteWS6

iTrader: (2)

Kyle,
Thanks for the thread. I plan on running the SD-Concepts 8-rib setup. I did some math based on their 7.25" crank pulley and to get about 12-14 psi of boost i think i'm going to need either a 3.2" or 3.4" blower pulley. But i'm basing the boost numbers on a stock LS1 so 12psi on my new motor will only show 9-10 psi on the gauge. That's at a 6,300 rpm shift point. I need to find out if SDCE offers smaller pullies so i get the full 12-14psi without belt slip. Does anyone still offer a cog setup anymore? I remember ASP was doing something. If i knew that running anything more than 10 psi caused belt issues i would have waited for a good turbo kit instead. I liked the QMP kit, but i read they have customer service problems. The CAS kit looks nice but the turbo kits are big bucks. Well looks like there's noway around running big injectors and the impedance box. Christ this setup is gonna put me in the poor house..lol. I need a cheaper hobby. thanks.

Den

BIGBOS

Its for sure not a cheap hobby, I would go with the SDCE stuff for sure, SDCE is currently making me a 3.2" 8 rib pulley, but I don't need it anymore, my problem is I can't get a hold of them to cancel the order so it looks like I'm probably $160 in the hole

You can get big boost out if it, nogo is making 16psi with the 3.4" pulley, but he has a FMIC

NA$TY-TA

iTrader: (21)

Thats exactly what im looking at also...... you will see how a bigger cubed motor (My 370) deals witht he boost and what we see since you will be going with a 383.
Kyle

1point3liter

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

BIGBOS

Do they list the 72's on that site?

1point3liter

I believe that would be around their 750cc injector.

MelloYellow

I thought .55 BSFC was the rule for SC's?

.55 must take into consideration the power to drive the blower?

NoGo

iTrader: (2)

It has been between .60 and .65 BSFC for 99% of the supercharged F-bods that we have had in our shop (quite a few)

My setup, a FMIC runs at .597. Most ATI kits with the duel front intercooler will run a little higher, up to a .65

The lower the boost you run the lower the BSFC number is going to be. If you are only running 4psi you may be at ~.55 BSFC