GTA89

Hello,

i just want to know what type fuel injectors
do i ve ?

car:
Pontiac Trans Am GTA V8 5.7 TPI 1989

i want to replace all the fuel injectors
with the O-rings..

anyone ve a good site for me ?
on ebay i can't found it or are hard to find...

Thanks anyway !

Rakesh

gta88 flamered

Rakesh,

last year I've replaced my old silver grey Multecs with the injectors from fiveomotorsports .
I've used the 22lb injectors with the pink top.

Prices are very good (cheaper than anything I could find in Europe) and delivery is fast.

Greetings from Germany

Jens

speed88

Stock fuel injectors on your car are Bosch 19lb's.

gta88 flamered

speed88,

for the stock ANYF.bin Tuner Pro shows me an injector constant of 22.36 lbs/hr.

Tony89GTA

iTrader: (7)

There 21lbs/hr for the 5.7L engine and 19lbs/hr for the 5L one.

GTA89

hi,

i found this on internet :

Fuel Injectors

There are a number of Fuel Injectors on the market today the following injectors have been furnished on GM OEM systems: Lucas, Bosch, Rochestor and Multec. The prices vary considerably and performance differences are hard to detect. Basically they are sized for application. The 5.0L injector is sized to deliver approximately 4.05 milligrams of fuel with a 2.5 millisecond pulse or 18.13 lbs per hr at approximately 36 PSI. The 57L injector is sized to deliver approximately 4.83 milligrams of fuel with a 2.5 millisecond pulse or 23.92 lbs per hr at approximately 43.5 PSI. This information is typical for all manufacturers and flow rates will vary slightly even between identicle injectors.

Lucas is presently pushing their new High Output Disc Injector and is referred to as a High Performance Injector. This product was introduced in March of 9l. They are competitively priced at approx $60.00 each. A wide variety of flow rates are available to include 18lb/hr, 24lb/hr,28lb/hr, 37 lb/hr. These are all 16.2 Ohms and will work well with all GM TPI ECM's Rochestor injectors are presently furnished for the 90-94 GM 5.7L engine. It has an all metal nozzle and performs well. Priced at approx $75.00 each. Bosch injectors are also an excellent choice at approx $87.00 each.

While there are significant differences between the TPI and LT1 induction systems and computers, the injectors are essentially the same. Sequentialport injectors and batch fired injectors are sized in the same manner. We regret that we have not been able to make DYNO comparisons of these products. We will be glad to share whatever we hear on this subject with you when you call. FIS stocks all of the injectors referenced.

http://www.fuelinjection.com/portinj.html

so this one from fivemotorsport is the best ?



http://www.fiveomotorsport.com/Injector_SetsTPI.asp

DJP87Z28

Original FI on your 1989 350 were either 22# AC P/n 17112940 or 17112005 which are no longer available. They have been replaced by the 22# AC p/n 17111961. These are also quite expensive at about $80/$100 each.

Pat Hall

iTrader: (31)

I just recently talked to Rich Jensen at Cruzin performance about which injectors are the best ones to send in to him for cleaning and flow matching. I have a set of the gray plastic multecs and also a set of the bosches, which are referred to as AC or Rochester injectors (they have RP on the housing). Both sets are 22lbs/hr. He said to definitely use the bosch ones, and to throw the multecs away, since they have the highest failure rate out of all of them. Those pink topped injectors look similar to the bosch ones, so they'd probably be a decent choice too. I've also heard really bad things about the accel injectors (usually yellow in color) from a lot of guys on this board, so I'd avoid those too.

speed88

My mistake. The 5L had the 19 lber's, the 5.7L had the 22's.

GTA89

Hello buddies !,

I need your help ASAP
I ve received the injectors !
from fiveomotorsport, but
where should i connect the clip see the pics below...
in the upper sleeve or the lower sleeve of the injector ?
if i use the lower sleeve, it prevents me to rotate the
clip and the injector into the fuel rail. TELL ME ASAP !




is it A OR B ?

9D1BURD

I put the locking clips on the top ring. If you notice, the ring labled "b" does not go around the injector body completely. So it won't work anyways.

GTA89

But i won't leak right ?
i really think you must have B...
i have put the new one en the old one
together, right on the fuel rails...
i can see, that you will have to put the
locking clips in the B. otherwise
if you use A, then the fuel injector will stand
a bit higher then the old one..

but B has not a fully sleeve,
its a half sleeve... so that your
injector won't rotate too..

well, i know, its all difficult men...
i will also contact the seller,
but i will still wait for your replys..

thanks anyway !

Pat Hall

iTrader: (31)

You might want to try sending gta88flamered a PM and ask him personally since he said he replaced his injectors with the same ones.

GTA89

Good idea

brutalform

Are the clips really needed? After the fuel rail is tight, the injectors are clamped, and wont loosen up anyway. Just wondering.

GTA89

i ve just contacted the seller,
he is telling me, that the clips are not needed
on the new injectors, because it
will hold on, by the intake...

but i don't know...

brutalform

I would install them without them. IIRC, GM used them soley to keep the injectors from falling off the rail during assembly. Someone correct me if I am wrong.

GTA89

i don't think it its preventing to fall...
but its preventing to getting loose from the
fuel rails while driving... there is a pressure on it...

but the seller told me to install without.

2new2funny

Mine have no clips and also have no problem.

Thirdgen89GTA

iTrader: (5)

I have the SVO 24#'s on my car. I used the clips in the top ring.

Do you need them? Probably not, but I put them back anyways.

DJP87Z28

Thats what happens when parts not designed for 3rd gen cars are used, result PROBLEMS.

Pat Hall

iTrader: (31)

Hehe. Call me a worrywart, but I'd want to use the clips too just because I knew they were there originally. Never thought about not using them, but, in theory, I guess they really don't need to be there anyways. After all, when you bolt down the fuel rail, they shouldn't go anywhere anyways.

gta88 flamered

Pat,

No need for a PM here. I've replaced the original injectors with the same ones and as far as I can remember, I've put the clips on the top ring.

I will take a closer look tomorrow morning.

8UpAFord

Without the clips your only problem might be down the road when you have to pull the fuel off and the injectors stick to the intake rather then the rall. Might be kinda a pain in the butt. That might be your only problem. Just slap on the clips you'll be alright you'll be able to tell if they don't seat right.

Steve89GTA

I have the fiveomotorsports pink tops in my car...work perfect