zero_g

iTrader: (1)

OK, searched for all the Fuel Injector info I could and have one final question. I ordered the Bosch IIIs from Southbay on Sat and will have them installed later this week.
Car is a 92 Z28 305 TPI stock. I could try calling Southbay directly this week but figured either they would be online or some of you could help faster.
Question: it sounds like the additional O-rings are "optional" from some of the posts, but I am bothered because most of the cars installing them are basically the same, why would they be needed on some but not on others. I read another post that you only need them if they are loose after installing. I like simple things, so I am planning on adding the o-rings (if not already installed when I get them). Is there any downside to just going this route? Or do I need to try to install them without the additional rings first??

Thanks for the help. this forum has been a great tool for me for the past 10 years! I've been lucky with little issues till now..

Bobby

BWilcox

Hi Bobby,

I run these injectors on a couple of different cars.

My suggestion is to utilize the "extra" O-Ring.

Why?

From a potential vacuum leak and/or fuel leak perspective, it is best to be safe as opposed to sorry.

Best Regards,

Bruce

Curious_George

I have two sets and use the o-rings in both vehicles (LT1 and LB9) with no issues. Just be careful when you go to seat the injectors into the fuel rail and intake manifold... I "cut" one of the o-rings and didn't realize it until later (3 or 4 days) and fuel pressure blew-out the remaining o-ring all over the intake manifold. Perfect opportunity for a fire, but I caught it just as it happened. I carefully replaced that o-ring and no issues in over a year.

Great injectors... car idles like a sewing machine and good mileage, throttle response, etc.

CG

Chevy86 IROC-Z

iTrader: (17)

I have the double o-rings. They are made like that for the TPI because the locking rings that hold the injector in the rail cannot be placed because there is no groove on the Bosch III. So as for added support and integrity, there is the double o-ring for that extra support as they will be "suspended" between the intake manifold and the fuel rail. Thats why on the instructions that I got from Jon at F.I.C. (http://fuelinjectorconnection.com/shop/) (which is where I bought my Bosch III's for under $150) It states to install the injectors into the intake manifold first. Peace.

zero_g

iTrader: (1)

Thanks for the help. I will plan on using the extra o-rings on the install. It will probably make more sense once I see it all together.

Chevy86 IROC-Z

iTrader: (17)

Anytime.

stampede52

zero_g If they have the new adapter you won't need a 2nd o-ring as the adapter makes up the difference in length. I called southbay a few times and they always had time for me. 516-492-6504
Hope this helps

Chevy86 IROC-Z

iTrader: (17)

True. You dont really need the double o-ring. But keep in mind that the Bosch injectors are more than likely going to be use for a long time and I mean for over a decade. So with that in mind, are you really going to have faith in 1 o-ring, or 2? I would rather have the 2 o-ring just for the added security. The more rubber, the less chances of a fuel leak (stop me if I'm lying). Besides, it's free so why not use both? Different concept but same idea, Why put on a gasket with no silicon if the silicon is right in front of you?

southbay08

Sorry i did not have the chance to get on line today. The answer to your question is as follows: we now sell our bosch lll's with our new adapter that makes the bosch lll's a direct fit for the TPi set ups. No need for the second oring anymore. Zero_g if you purchased the bosch lll's with our new adapter you do not need to do anything but install them!
Regarding the second oring for added security, hate to pop your bubble but that second oring does absolutely nothing!!! It is not going to protect from a vacuum leak or a fuel leak, it acts as a spacer just to give the additional length that is missing for proper fitment. If any of you ever have questions about the fitment of injectors, please call us!! We will be happy to answer your questions. 516-492-6504
Here are some pics

www.southbayfuelinjectors.com

Chevy86 IROC-Z

iTrader: (17)

You're mad because I chose to buy from Jon after communicating with you. Come on now. Dont get mad at me for promoting www.fuelinjectorconnection.com
It's not a monopoly and everyone has a choice of whether they want to buy your $160.99, or the very same set @ $148.95 from Jon at www.fuelinjectorconnection.com. Besides, you didnt pop my bubble, just your cherry. Also how does a 2nd ring "give" space for additional length? Do you mean width to fill in the gap at the top of the intake manifold injector rim?

Chevy86 IROC-Z

iTrader: (17)

Your pictures clearly show that the o-ring has nothing to do with length. It's clear that the new nozzle is longer which plunges the o-ring deeper into the intake manifold. So double o-ring has nothing to do with its use as a spacer to give the additional length. The choice is yours zero_g FIC = $148.95 or S.B. = $160.99.

irocuroc

let me try to clarify something.. the second o ring put on the grove that Bosch provides on the injector actually sits in the champher in the manifold. This in turn raises the injectors installed height which puts the upper o ring in the fuel rail far enough(actually exactly at the same height as the stock one) The second o ring now becomes the bottom of the injector that sits in the manifold. Too many of you guys have never installed one of these sets and talk about it like you have. There is no money in Keyboard Mechanics! I have been using these in my shop for a few years. I even use them in caddy's and Buick since they all used that crumby multec. So in short buy your injectors where you want but I can tell you the Bosch 3 with the o ring provides a nice seat that is insulated and keeps the injector at the right height. Just talk to the guys that are running them and not the guys that just guess. nAlso the picture above does not show the 3rd o ring installed in that grove. If you look closely at the beveled edge on the bottom of all the injectors you will see how the bevel fits in the champher in the manifold. Again, that new ring in the injector provides a NEW seat to sit in the champher.....Raising the installed height....Everyone promotes their own mod and their expertize, Just tell me why the injector is made with that groove. Check this vid out its a few yrs old but explains the whole fitment deal. http://www.youtube.com/watch?v=O4rMKECHbeM

zero_g

iTrader: (1)

Ok, I got the injectors in the mail today from Southbay. They are the 19lb direct fit ones per Southbays pics and description (thanks for responding, i knew I could call if I didnt get a response from the forum members). Again, my original question was based on the search results on this site. Apparently I didnt pay much attention to the description on the site other than them being the correct fit ones. Thanks again for all the help.

chevy86
I know I had options, but my internet shows Southbay at $140 and FIC at 160? I went the cheaper route and do believe in supporting member companies as long as I am getting the best price along with that. Nothing against FIC, never had a need to talk with them but they are probably a good company to. It is guys like you that keep this site so helpful. Quick responses are always appreciated. I wish I had all the different injector configs to compare all the opinions on this thread for fit. The engineer in me is always curious.

Seems everyone has a fairly strong opinion on this subject. That's why i needed to post my question in the first place. Thanks again everyone.

Bobby

southbay08

Know what ?? i could give a flying sh__t about FIC you never see me mention him,,, what is your problem????? Is he your "butt buddy"? Did you design the adapter? Do you sell fuel injectors? It has nothing to do with the NOZZLE!! Did you notice how the orings match up? If you knew anything about injectors you would know that the only whay to know if an injector is going to fit is to measure it oring to oring. That's how smart you are. Why don't you try your own little experiment.. remove the second oring and then tell me how it fits since you seem to have all of the answers!!

DENN_SHAH

iTrader: (1)

where i work, we've used injectors from both FIC and southbay.
i have nothing but good things to say about both companies.
both offer a quality product at a great price.
that said, i seldom let a customer influence who we buy from.
but because of your antics here Chevy86, maybe you should let Jon at FIC know you have hurt his business.


mods, please this.

Chevy86 IROC-Z

iTrader: (17)

It's just a game that never ends. I appologize to the members who have taken offense. The conflict is now over and I will not participate in any S.B. posts. I will continue to post, but nothing that is pertaining to S.B..
DENN_SHAH, If I had a business any everyone was fighting over it, I would be flaterred because if someone mentions my name or business, whether it be good or bad, it is still good publicity as long as they mention me. If it makes you feel any better, just kick rocks.

Chevy86 IROC-Z

iTrader: (17)

On a final note, they are Bosch III injectors. One of the best for our TPI systems. I just tried to help out others by suggesting another seller due to his lower prices and everything went down hill. S.B., forgive the comments I made. I stated what I felt and you've stated your opinions. It's gotten ugly and I/we turned this thread upside down. Do you accept?