I just bought some Bosch IIIs from a guy who said they were tested fine (they were used) and that they did fit my model camaro. these injectors i noticed, have no retaining clip or place to put the old ones to keep them from moving up or down. they also seem a lil shorter than you average injectors and skinnier too. I believe he said they came out of a mustang, not sure what type. I can see the silver (metal part of the injectors at the bottom, should i be able to see that part when they are installed, or do i need to push them down so that i cannot? i was just afriad that would leak if i push them down too far. so far, i have just one leaking and have been able to fix the others (probably just has a bad o-ring). most of them are showing silver at the bottom, one of the is not and doesnt seem to leak. whats the best thing to do with these injectors and do they really go with my 1989?

 

i run bosch 3's.. they work fine. But, the injector shop that i bought them from has a modified base so they take up the 1/4" that they are missing. What you have to do in your case is cut 1/8" off the stand on the manifold that the rail bolts to.. if you take off too much the rails will hit the runners. thats all you have to do. or send them to fic for the mods. cleaning and the right GM orings. Fires suck as the pressure builds they will squat in the manifold to far exposing the top o ring and then you will have a big problem. Do it right

 

hate to cut the manifold in case in the future i wont be using these injectors. what is fic for the mods....not sure what you are talking about

 

I also have an 89 tpi but mine is a 5.7L. I bought the bosch III injectors from fic and I also noticed that they are shorter. They just sandwich in between the fuel rail and the intake without the clips and seem to fit ok. I dont know if anybody else has had this problem, but when I put mine in, it started up ok(not the best) but my car starts to smoke almost instant when its running. Its a raw fuel smell and it smokes very bad when you rev up the engine. It didnt smoke one bit when I had my orignals in.

 

what did Jon FIC say ?
he has a good reputation, but I would hate to yank out TPI injectors for no reason.....

 

I already talked to jon. he is going to send me another set of injectors. after talking to him about the problems, he thinks that one or more injectors have gotten stuck open. thats what seems like is happening. pouring fuel in the cylinders and being pushed out into the exhaust and burning there.

 

is there a way i can get one of those modified bases?
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mine smokes white smoke when i crank it and thats the only time i have noticed the smoke, but heck my camaro has done that the whole time i have had it and it has other problems right now anyway.

 

wow... i have my Bosch III's at home just waiting to put them bad boys on. BUT NOW i'm a little nervous about it!!! I did talk to John when I placed my order and he was a real cool guy. These injectors are suppose to be the best for what they cost at least. I'll fill you guys in once they're on.

 

black smoke is unburnt fuel.
blue smoke is buning oil.
white smoke is the worst, blown head gasket.

i also bought bosch 3's from jon. i have not yet installed them or actually seen if they are the same hieght as stock, but when i bought them i was under the impression that they were" modified" to be a 1/4" taller to fit the tpi system properly.

 

don;t compare them side by side.. its the installed height.. so check them next to an orig side by side in the manifold. Armygreen will sit 1/4 lower than yours

 

Are they modified by FIC so the distance between the o-rings that are the same as the originals..?

/Per

 

mine were modified so that when the injector is installed the top o rings line up with stock.. they acrually sit up in the manifold higher making the tops at the right height. the thing you want is the top o ring in the rail far enough to prevent a leak, the bottom is a vac seal and the bore in the manifold is high enough to seal the bottom fine.. All i know is they work perfect and about 15 guys in my club have bought them also. Watch this u tube video by FIC
http://www.youtube.com/watch?v=KFY_PKJNqbs

 

white smoke from the tail pipe can also be fuel.
its actually a vapor, but it looks like smoke.
it dissipates very quickly & you easily tell if its fuel or not by the smell.
its extremely explosive, the smallest ignition source will set it off.
normally its caused by the FPR leaking.

 

I got Bosch 3s from FIC 2 weeks ago. Right length and work great.

 

ive had the bosch 3s in for little over a month no problems, car runs better than it ever has, fit was perfect. same length as originals, install was a breeze. jon is a very cool dude.later jimmy

 

if it was blown head gaskets, then im sure i woulda have major problems a long time ago because ive had this car for about a year and its done that since i got it. MOST of the time, it only does it when i crank it up and then again it doesnt smoke everytime i crank it. so whats and FPR so i can have that fixed...
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so that guy that sold them to me must not have known that i needed a modified base because i haev an '89 model....damn...oh well guess i will put the old ones back in, good thing i kept them

 

FPR is the fuel pressure regulator and I do not see how it would cause white smoke out the tail pipe?

Maybe he meant injectors leaking?

 

well i never knew of it leaking and dont think it was. think maybe it would have something to do with injectors btu not positive

 

i should have explained it better when i first posted
sorry, my bad.
i was adding to what Firebird said.

maybe this will be more clear.
this is what i should have said to start with, with too much fuel there are 3 stages of smoke. the first is black smoke, & with even more fuel it turns to gray smoke, both of these are actual smoke & you don't have the raw gasoline smell from the tail pipe with them.
next is the white smoke, which as i said before is actually fuel vapor.
most of the time when the FPR starts leaking into the intake thru the vacuum line, the motor will run bad, you'll have hard starting, missing & stalling out. but it doesn't
necessarily always cause the motor to run bad other than extended cranking. when this happens, the fuel smell from the car is very strong, like putting a couple of gallons of gas in a 5 gallon bucket on a hot day & sticking your head in the bucket type of strong.
it also doesn't cause white smoke on a cold motor when you first start it, but after its ran for a few minutes. the warmer the motor is, the more noticeable it is.
i have only seen this happen on vehicles with high pressure fuel injection & with a working cat.

i doubt your FPR is leaking, other wise your fuel mileage would be horrible & your oil would be thinned out & smell like gas.
odds are your startup smoke is from leaking valve seals, a very common problem with a SBC.

 

Is there anyone here running the 24lbs Bosch III's for $189 or are you all running the 22lbs for $169?

 

Bosch III is really nice Dont think you could get any better injectors on the market., Ive tested 4 types.
And the Accel was crap (old design, dont have good spray pattern either..)
Ford (denso made) was crap to, dont like pressure over 39psi...
Multec well worked well when they are clean and brand new, 19 years old = not soo much like.. Bosch III GREAT injectors, beatiful spraypattern and flowmatched, Jon at Fuelinjectorconnection (FIC) sells them for 169,95 with 3 years warranty. He also modifies them so they are the same height as the stock multec..

Here you got a picture of the injectors Ive tried.


As you may see on the nozzle the:

Multec got one large hole, wich gives a decent spraypattern but it will fail and lock up at high load / high rpm..

Accel Got and smaller nozzle, this spraypattern is good for tubros not for an stock / almost stock engine..Still its accelcrap, So I wouldnt buy them again...

Ford (Denso) Almost the same nozzle as the accels.. but the Denso dont like pressure above 39.15 PSI = no good for camaros.. we are running higher pressure.

Bosch III (modified) Got 4 smalls holes wich gives a great spraypattern it makes it spray real fine, wich helps the spark to burn it good. They also flowmatched and flow exatcly the same

Link to FICs Bosch III modified 22lbs/hr injectors : http://fuelinjectorconnection.com/sh...&productId=134

And YES, the Bosch III dosent use any C clips to hold them down, But Jon modifies them So they got the same intall height as the Stock ones.
You need to push them down into the intake then the fuelrail is installed.
Here you got a picture of that :

The left one is pushed down. 100% sealed, and they work REALLY GOOD, never had so smooth idle (tried 4 types and this got the best result)

 

a bunch of guys in my club are usung 24's.. same fit same case but they are blue.. all they did was change the injej constant to 24, another guy races. dr sam has 3 camaros abd 2 vettes,, all now have bosch 3

 

I was under the impression that you could just cut the stock c-clips in half and use them. The nozzle will not sit down in the base as far, but that may not be such a bad thing if you're doing port work.

 

here's what will happen there. the injectors is being held up by half a clip. there is no place on the bosch 3 for the clip. so now the clip gets loose. then the injector slides down, now the upper o ring is not sealing to the fuel rail,, guess what is now leaking all over your hot engine. FUEL!!.. just buy them from someone who knows all about the TPI.. be safe

 

I am a little confused by your pic. Which one is properly installed? Should u be able to see the O ring??

 

The proper one is on the left.

If you follow the directions you should install in the intake first then put the rail on. for about $3 you can also change all the other o-rings in the rail.

I would not put the 1/4" short ones in without something to hold them in the fuel rail. Get the correct ones from FIC or install an automatic fire suppression system. Multecs are not an option.

Oh, and I wish I had ordered the 24lb, but I have flattop pistons and a comp cam. If I was stock I would say go 22lb. Just my preference.

 

so your running the 22's on a 305 motor.....
did you adjust the FP downwards, or adjust the PROM ?

 

Not sure who you are referring to on the 22lb injectors with a 305?

But since I just posted I will assume it is me. I have a 350. And I may adjust the pressure up a little. Most likely not.

 

I reburned the PROM with injector constant : 22.02
Never had smoother idle then this, And ive tried different types of injectors.
I would REALLY RECOMMEND the Bosch III from FIC, I wouldnt recoomend any other then those
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I wrote that the left one is pushed down and 100% sealed

 

Hi, I just bought a set of these fron Jon @ FIC. They are all different heightsin the manifold. In this picture is this how you are running them; with the 2 different heights?
Thanks,
Jim

 

No I only took that picture to show right and wrong intalledment.
The left one is correct installed,
You have to push it down until its into the bottom.

So as said, the left one is correct installed. So you have to push yours down until its all the way down.

 

i am building a 350 but have a 305 in the car now. i want to get new injectors and see that Bosch III might be the best. i went to their site and they say that they are no longer shorter. so my questions are:
do i have to modify them to use them on the camaro
can i get the 22 lb ones and use a pressure regulator to reduce the gas flow and then not have to buy new ones when the 350 goes in?
or
is there a 3rd alternative that does not involve buying two sets of injectors?
thanks tony

 

Thanks. Much appreciated!
Jim

 

Hi there!

Bosch III are little shorter (as stock) but Jon at FIC modifies them so they
get the same hight as the stock ones, So if you buy the yellow 22lbs Bosch III I showed in the picture above, they will have the same height as the stock ones..

And yes, you can use a fuelpressureregulator to lower the pressure to get less fuel. One way to go is to burn a new PROM/CHIP (if you know someone that does that) then you wont need to lower the fuelpressure.

Just give Jon a call and say that Dan (theking) told you to call.
Phone nr : 770-888-1662

the 22lbs will fit both 305 and 350 (350 right on and 305 with lower pressure or reburned PROM)

Take care man

 

thanks for the info think i will give him a call. got any info on regulators. here in cal they are illegal, but i probably can put it someplace hard to see and cool too. maybe under the car.
by the way you have my car!
i was going to do a complete new repaint but decided to keep it the same color, blue, as it was when i gve it to my wife in march 90. only had 7 miles on it then.

 

The regulator will only be placed under the plenum like this :


You see the silver thing thats the regulator, it needs to be placed there on TPI engines. There are others that look pretty much stock.

So they prolly wont notice it if you change it

 

i think there is also a write up on here on how to make your own adjustable regulator using the "stock" housing.all that they could see is a screw out the top...hard to see unless they are extreamly picky in an inspection.