C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Jun 25, 2009 | 02:49 PM
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everyone knows that an injector swap on a TPI in a PIA. Here's the good news. Once you put in Bosch 3's, you can now swap injectors, upgrade to a larger size or just remove them for yearly maintenance without removing the plenum. Takes less than an hour!!!
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Old Jun 25, 2009 | 03:04 PM
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Originally Posted by FICINJECTORS
everyone knows that an injector swap on a TPI in a PIA. Here's the good news. Once you put in Bosch 3's, you can now swap injectors, upgrade to a larger size or just remove them for yearly maintenance without removing the plenum. Takes less than an hour!!!
This caught my attention.... I was not aware, how is this so?
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Old Jun 25, 2009 | 03:50 PM
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Old Jun 25, 2009 | 03:54 PM
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DO TELL
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Old Jun 25, 2009 | 04:02 PM
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Originally Posted by tmichaud
This caught my attention.... I was not aware, how is this so?
since the Bosch do not use clips you will be able to lift the rail enough by removing the 4 bolts to the rail. Lift the rail and push the injectors up as far as they go in the rail. (about 3/8 inchs), This gives you enough room to pull them out one at a time. Reinstall the same way buy putting in one at a time pushing all the way up in the rail, once they are in, position the rail and slowly pull the injectors down to seat in the manifold. Then bolt the rail in place and you are done.
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Old Jun 25, 2009 | 06:41 PM
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Well Ill be damned!!!! WW
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Old Jun 25, 2009 | 06:53 PM
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What's "yearly maintenance"?
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Old Jun 25, 2009 | 06:59 PM
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Neat! Next time I have to pull that damn intake off the whole engine is coming out of the car.
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Old Jun 25, 2009 | 07:09 PM
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cool!!!
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Old Jun 25, 2009 | 10:34 PM
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Originally Posted by coupeguy2001
What's "yearly maintenance"?
Yes, what is yearly maintenance??
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Old Jun 25, 2009 | 10:40 PM
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YUP, I just seen post here that some one did it.
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Old Jun 25, 2009 | 10:58 PM
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Originally Posted by FICINJECTORS
since the Bosch do not use clips you will be able to lift the rail enough by removing the 4 bolts to the rail. Lift the rail and push the injectors up as far as they go in the rail. (about 3/8 inchs), This gives you enough room to pull them out one at a time. Reinstall the same way buy putting in one at a time pushing all the way up in the rail, once they are in, position the rail and slowly pull the injectors down to seat in the manifold. Then bolt the rail in place and you are done.
So I guess you got my package from NC

It is indeed that easy. Did it on my 91 last weekend. I swapped out bosch 3 for bosch 3 and there is plenty of room to lift the rail and get them out. I just removed the plenum (I took the plenum totally off, but didn't remove any stuff from the TB), removed the 3 bolts holding the fuel lines down, and then the 4 rail bolts. Pulled the injectors still stuck in the rail down and tilted them out.

I actually put the new ones into the intake first and then pushed the rail on all at once per side (after careful alignment). The hardest one is over the #2 cylider as the fuel lines were still attached on the front (doesn't let you lift the rail as much).

Never touched the runners.

After doing this, I think it may be possible to do the originals this way if you are some kind of ninja with a screwdriver on the clips. I wouldn't try it myself due to the inevitable clip down the intake hole.

Thanks again FIC!

SteelBlue91
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Old Jun 26, 2009 | 01:05 AM
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Originally Posted by jimg's'93
Yes, what is yearly maintenance??
there is no reason to have maintenance on injectors that are used in daily drivers etc..but believe it or not I have plenty of customers that regularly on a yearly basis send their injectors in to be cleaned and serviced. You know who you are, is it good? Its not bad. So, if you want to do this its up to you.
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Old Jun 26, 2009 | 09:50 AM
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Shazbot! I find this out after just installing the SVO's
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Old Jun 26, 2009 | 10:13 AM
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I've only got two......
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