The ford motorsport injectors that everyone seems to talk about, #M9593-A302 24LB/hr. Does anyone know what pressure they are measured at? Is it 1 bar, 43.5 psi?

The reason I ask is that most ford applications run at 36-38 PSI.

I thought all injectors were suppose to be rated at same PSI, but I thought I would check.

Mark.

 

Mark,

The SVO injectors are rated at 37psi. Installing 24lb SVO injectors onto a thirdgen would require setting the injector flow constant in the PROM to 26lb/hr. For 30lb SVOs you would have to set the constant to 33lb/hr.

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels. Stock Wheels. No Weight Reduction.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

What all is required to change to ford 24lbs injectors? Will a Hypertech PROM chip work or would I have to have a custom PROM chip burned? I want to move up to those injectors but am unaware as to what all is required. Any help is appreciated.

 

Egads, 37psi. Well the ford 24lb would certainly support some big hp.

Are the LT1 24lb injectors rated at 43.5?

Tim, I found my prom burner. It is an old Heath Eprom programmer 4801. Have you ever used it (or seen it?).

Back in 86 or 87 my brother was big into the tpi's and proms (electronics engineer). I inherited the burner, some adapters, etc. Rather cool!

 

Blacksunshine:
In order to switch to 24lb injectors you should get a custom PROM that has the injector flow constant set appropriately. No - a standard HyperTech chip will not work as needed

Mark:
Yes, the LT1 injectors are rated a 43.5psi. However, I am now hearing that the LS1 injectors are rated differently. Anyone know about this?
Nope - never heard of the heath programmer. Have you done a search on the internet yet?

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.587 @ 107.97mph (1.710 60ftr) on the long runner setup.
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels. Stock Wheels. No Weight Reduction.
Gunning for NA 11's with the MiniRam II and Hooker LT Headers.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

For the sake of engine harmony and future applicability, I was thinking of putting a set of the 24 or 30# SVO's into my 305TPI. One day, like so many, it will grow up to be a big bad 383, and I'd hate to waste now on smaller injectors than would be needed for a ca.450hp combo of the future.

Any suggestions? I can set the FI constant to whatever, guess I should be targeting a BLM of 128 coarse & fine at whatever FP I'm running (45psig). Anyways, I'd like to get the benefit of having a new, relatively balanced (vs. my 150kmile stock 19#ers) FI array without flooding it out. MEMCAL would likely be a bit less useful, eh? Anyways, I'm open to comments. The SVO's look attractive right now, particularly w/r/t pricing.

Thx,
Craig

 

TRAXION,
The LS1 fuel injectors are rated at something like 62psi. My '99 SS is said to have 26 lb/hr injectors, but rated under the new system. My '99 injections are the same as the 22 lb/hr injectors that I have in my '87 L98 350. I guess GM wants to make things more confusing.

The '99 fuel system is set at 62psi stock, so maybe thats why they changed the standard.


------------------
'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(48psi), K&N filters, Hotchkis lowering springs, Car-Pro custom chip, Lay Ind. ram air kit, 265/45R16 Kumho V700 tires.
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter.
313.7Hp & 320.6ft-lbf, 13.55sec @ 105.1mph

 

Is there an "Injector Flow Constant" on a MAF system or is it only on an SD system?

 

Craig,

DO NOT put 24# SVO injectors on your 305. They will be waaaaaaaayyy too much for it.

Wait till you build your 383 then get the bigger injectors. And, as mentioned, you will need a chip for the ECM that is calibrated for the injectors.

 

There is an injector flow constant on the MAF prom as well as the SD.

 

Madmax,

What software are you using?

I am in the process of choosing one for my MAF setup.

How easy do you find the software to use?

Mark.

 

Well, I was using the tunercat. It sucks
I know there are some errors in it here and there, but its easy to use otherwise. I was looking at the GMEpro stuff but never did get it. Not sure if its better or not.

 

Sucks? Wow, tough rating.

I thought the graphics and such would be nicer to use than the dos based one.

I don't care what it really looks like, as long as I can find what I need and change it.

Just curious, what year of MAF are you working with? I assume you need the definition files for each year.

I was figuring on starting out on the 1987 5.7L version since that is what I am running and what I know best. Then after I learn enough about that, I will go to a 1989 (without coldstart) and go from there.

Unfortunately, the gasket leak fairy has visited me, and I am now changing my intake gasket ... but what the heck, great time for some 24lb injectors!

MArk.

 

Gasket leak fairy... yea I know her. She reared her face and I got to find out how my polished combustion chambers helped out after 10,000 miles of abuse.

What I didnt like about the program was that it was inconsistent sometimes with different BIN files that I knew were ok, a value or values would come up and just be way off. The 87-88 definition files are the same, maybe a different timing table in the BIN but I doubt it. Im not sure what may be different on the 89. I have all the definition files though. If I remember, the 86 is 32, 87-88 is 32B, and 89 might be 6E, or maybe not. I never looked much into the 89 stuff. I could probably find out by trying to open an 89 BIN file.
You can shoot me an email if you need anything. I still have it on this puter somewhere.
Oh and to answer your question, Ive been dealing with 86-88 stuff.

[This message has been edited by madmax (edited September 29, 2000).]