Well after looking through the archives I come up with a question. I am about to install a 350 I just bought. Im upgrading from 305 and since I'm going to be running 6lbs of boost in, the 19lb/hr injectors just wont do. So my question is: Should I get 22 24 or 26lb/hr injectors? I dont plan on more than 450hp and wont initially have much more than 300. Im figuring I'll just order a set from Accel.

depends are you going to burn a new chip or have one burned?otherwise you are better off running a fmu and a high pressure fuel pump or an additional inline unit! if you are going to cahnge the chip then i'd do exactly as i've already done and get 30 lb ford motersport injecters and start with the constant at 31 or 30 so as to be rich with the sc.currently i'm running mine at 29.2 and pushing 6-7 lb boost at wot.no need for the fmu and fp is set at 42 psi.
later
pete

------------------
1990 Trans Am,350 TPI(L98),WS6suspension ,bridgestone RE71's /245/45/zr16
edelbrock manifold,asm ltr's
paxton supercharger,afr 190heads, alston sfc's,msd 6AL-BTM,
8.5 superconductor wires SLP 1-3/4 headers,duel cats,3"slp exaust, lakewood LCA's,T.B.Bypass
160 degree stat,alum driveshaft,fiberglass wing,custem chip by me!

"if you cant win fair CHEAT"

id do like pete said and use 30#'ers. the last thing you want under boost is to run lean.

Well the problem is, I want to be able to run without the supercharger without running ridiculously rich. Would that require two chips or could I find a happy medium. I have a custom burned chip that the previous owner installed. Unfortunatly I have no idea what settings are in it. Could you go into more detail about each option. 30 pounders just sound really overboard to me. And how about return line restrictors based on boost?

if you arent going to have a new chip burnt or as i would suggest learn how to burn them yourself.then go the route of the fmu a boost compensated device that raises fuel pressure as boost increases-these devices often push fp pressure levels to 70-90 psi and require a very good fuel pump.another option would be carrol superchargers superfuler that is an addon unit that i beleave adds a plate between the plenum and throttle body with some (3 i think)additional injecters that operate independantly off their own map senser.i'm personally running 30 lb injecters with no adverse affect on idle and the wot seems to be very close,but i have put a few weekends and many hours of research to get to where i'm at.if your just looking to get close i'd use the fmu.want to get closer -use the superfuler, want to get as close as possable--learn to burn your own chips,start with traxtons article and you will be well on your way.
cost to start
1-autoxray-e-bay-125
2-pocket programmer-150
3-flash proms-6$@ea
as you can see more expensive than a fmu(as long as your fuel pump dosent go south)less expensive than the superfuler.
by the way you cannot put 24 or 30 lb injecters in without a different chip or the car will idle and run like cra p.
pete

[This message has been edited by blowen90ta (edited September 25, 2001).]

Dont get me wrong, I know I will almost certainly need a new chip burned, and I want one burned just so I know whats in it. But after reading the article on chip burning it sounds like I will just break more than I fix fooling around with it. Plus I would like to have something transparent while the engine is not supercharged. (I guess two chips could do that, but it doesnt seem right) Is it cheap(or possible) for a local speed shop to adjust a fuel map for my cars specifications? I just dont see how it could get too close with a computer that is only aware of vacuum. Forgive my dumbass questions here, I just dont want to get this wrong while I still have the opportunity to get it right. The supercharged 305 nuked and I dont want the same to happen to the 350.

I'm running #24's in my car now. Starts right up and idles great, all modes but the injectors are listed. There is a formula that someone has, not sure what it is. I believe the 22's are good to 450hp. I'd get 26's to be safe. Take your time, burn your own, be much happier in the end.

------------------
'87GTA w/ SLP Cold Air, MSD Coil, Airfoil, Gutted MAF, AFPR, TES Headers, HI-FLOW CAT, Flowmaster Catback, Energy Suspension Master Bushing Kit

I chose the Superfueler and kept my stock 19# injectors (305). The beauty of this system is that it operates only under boost by injecting whatever additional fuel is required through three additional fuel injectors. This allows you to tune your car as though it is not supercharged, keeping your stock (or near stock) rated fuel injectors, so no loss of driveability occurs at the low end.

------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

I think the Callaway twin turbo Corvettes had a similar setup to that. It would really be ideal, but wont that destroy any hope of fuel efficiency? It doesnt seem like that could time or atomize very well up at the trottle body.

A wet nitrous kit injects fuel and nitrous through a plate wedged between the throttle body and plenum. The Superfueler does exactly the same with fuel. It is not a concern of mine that it does not atomize, the injector spray pattern and fuel pressure take care of that.

Willie

I dont know why I even said that. The air is going to be at high velocity whenever those injectors are being used. Where did you get yours and how expensive are they? If its going to be like a grand I may as well get big injectors and a custom chip.