TBI92Camaro

A buddy of mine needs a 19# injector for his 90 IROC-Z 305 TPI car and I have a set of 19# injectors in my 89 5.0 HO Mustang....are these the same? I know I can use LS1 injectors in my car and SVO injectors can be used in TPI cars.....so can my 19# injector work???

80Sierra

Ford rates its injectors at like 38 PSI, while Chevy rates theirs at 43 PSI. So, if you put Ford 19 lb injectors into a TPI, its closer to 21.5 lbs Hense, why I just put a set of Ford 19 lbs injectors into my 355 TPI to replace the sucky 22 lb Multecs I had before.

QuickStyle

injectors are not rated by the factory psi set fuel pressure, they are rated in BAR levels,most are rated at BAR 3 which is equal to 43.5psi. so ford 19 lb injectors are equal to chevy 19 lb injectors and they will work in his camaro as 19lb injectors not 21.5lbs. most injectors are made by "bosch" and are universal from imports to american vehicles. i bought a set of ford svo 24# injectors and put them in my honda and they work great 30+mpg and i still have the other four that are brand new
80Sierra - i would remove those 19lb injectors and put stock like injectors in there, you are probably running too lean

80Sierra

I hope not...

I'll check my BLMs once I get the truck running again, and replace them if I must

Damon

Quick- sorry, but that's just not the case. Maybe the injector companys rate them in BAR but the automotive companies do not. They rate them in PSI and they use 2 different standards- 43 PSI for GM, 37 for Ford. A Ford 19lb injector will flow more than an equivalent 19 lb. GM injector at the same pressure.

vernw

iTrader: (2)

And GM LS1 injectors are rated at 58 PSI.....

Ford I think actually uses 39 PSI don't they?

QuickStyle

you have to understand that they are not "ford" injectors, they are made by bosch, and bosch sets the ratings, not ford. bosch set the lph at 19lbs @ 3bar(43.5psi).
2bar = 29psi
3bar = 43.5psi
4bar = 58psi
all fuel injectors are rated at the industry standard of 3bar. if you dont believe what i am saying search this site for this topic, its been beat to death on here, and also search google for some information on it.

80Sierra

Ugh, what a pain in the butt...

Now to find some good Bosch 22 lb/hr injectors then. I read several topics that said that Ford 19 lb bosch injectors would equal 21.5 lb Chevy injectors with the pressure differences.

Man, this TPI just costs me more and more, and never seems to get any where, lol

QuickStyle

people have come to the conclusion that since ford 19lbs are rated at 39psi they will flow more with 43.5psi, but most people dont understand that all injectors come from bosch in someway and are all rated at 3bar(43.5psi). and will flow there stated lph @43.5psi.

i would recommend you get some ford racing svo injectors, i have heard alot of bad things about accel injectors, so try to avoid those. they dont make them in 22#, you should get the 24# ones, i use them in my 91 5.7L, only bolt on mods, and they work really well, doesnt seem to run rich, still good gas mileage too. here is the part number i got from summit:
FMS-M-9593-A302

80Sierra

Yeah, I had a line on a fairly cheap set of SVO 24 pound injectors, but passed when I read that the 19 lb would be the same as a chevy 22.

I'm running a mildy built 355 with a bit more of a choppy cam than I should have for a TPI (110 LSA, rather than 112 like I should have for the EFI) so I think I would need a bit more fuel regardless.

I plan to get into programming my own chips pretty quick, so if it doesn't run extremely rich, and gas foul my oil like what happened with my 89 half ton, I guess I'll get a set of 24 lb injectors.

I think I also saw that some of the J series corporate 3.8s (91 + it seems) have a set of 22 lb injectors, I often see those cars in the wrecking yard, so I may try a set of them before I go ahead and drop the big bucks on a set of SVOs.

QuickStyle

i believe that those cars have the Multec injectors, and those in everyones opinion are just plain junk.

80Sierra

Junk indeed!

I swapped away from them in favour of the 19 lb ford injectors. Not sure how I am gonna be able to afford a set of SVOs, I can barely keep gas in the tank of my beater car, not to mention trying to restore a truck, lol

3.8TransAM

SVO ratings are equal to GM injector ratings on the 19, 24 and 30#

I have personally tested this out on vehicles of my own with the 24 and 30.

Also Rich at Cruzin I know has verified this on the 24 and 30# SVO's by backing it up with flow numbers as well.

A 24# SVO on a stock 350TPI app will run rich and about the limit of what the stock computer can compensate. With a stock engine an no tuning u are on the very edge of the limit.

Take it for what it is worth.

Just remember, there is a lot of mis information out there. People repeat a lot of the same garbage and have never checked for themselves.

later
Jeremy

Formula2208

my buddy has a 1986 ford mustang 5.0 HO will his injectors work for my 1989 firebird 350tpi?