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Old 07-19-2002, 09:22 AM   #1
8Complex

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Default RC Injectors vs. stock intake manifold...

Ok, everyone that has RC Injectors please let me know how yours sit. I fitted mine to the intake manifold and found that I'll need larger o-rings (no biggie), but that also it sits down in there so far that the actualy body of the injector sits against the manifold.

Has anyone honed out the injector bores to make them fit better?

Has anyone filled in the air bleed channels to create an actual round bore instead of one interrupted by the air bleed hole?

Any problems with seating under boost? I heard a horror story about a set of Vishnu rails & RC injectors last night describing a loose enough fit with the o-ring that the injector was actually leaking air in & out of the manifold causing a cylinder to run lean/rich.
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Old 07-19-2002, 09:54 AM   #2
redmeanie
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Default

Im running RC 440's I got from Andrew at AMR not sure if he changed the o-rings or not....Mine fit fine and snug on both the intake and fuel rail I just had to add the spacers... I have No leaks....You might want to give him a call if no one has the answer for you....
Chuck
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Old 07-19-2002, 02:04 PM   #3
skywalker
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Cool

I have had no problems, with either the 370cc or 440cc injectors I have. Why not try changing the o-rings from the stock injectors and put them on your RCEng injectors.

Just a thought...

~Bill
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Old 07-19-2002, 03:23 PM   #4
8Complex

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Default

Well, the stock injectors' o-rings are smaller crosssection then the ones that are on the RC's, but the RC's groove is smaller ID then the stock injectors. (ie. they won't work )

I can go to Autozone or somewhere to find the right o-rings, but my main concern now is whether or not they'll seal up right with those air bleed channels halfway down the bore in the manifold.
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Old 07-19-2002, 05:45 PM   #5
Boostup!
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My RC550s don't fit very well either but with some clever use of RTV silicone, they will not leak and will work okay. Although I would have liked it better if the injector nozzle was closer to the opening on the inside of the manifold. Now it has to spray thru this long tunnel which makes me wonder if the spray pattern is degraded any. The only way to remedy this is to have machine shop bore it out just right. I might do that if I can find a cheap used manifold. How much do they sell for usually?
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Old 07-19-2002, 05:46 PM   #6
Gerry
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I was looking through the MSD Ignition mag and they have a drill bit make for drilling the injector seat..Also MY00 and MY01 manifolds have the coolent running through it for the injectors for emissions or something stupid. ON MY99 and MY98 They don't have the coolent flowing through and the RC'a fit rite in with no problem...Gerry

Last edited by Gerry; 07-19-2002 at 05:51 PM.
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