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Old 01-09-2008   #1
-=Jeff=-
 
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Default Injector Housing Question

will injectors housings from a 93-95 fit a 90?

what is different on them?

also how about the plenum?
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Old 01-09-2008   #2
Locobob
 
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Default Re: Injector Housing Question

Quote:
Originally Posted by -=Jeff=-
will injectors housings from a 93-95 fit a 90?

what is different on them?
Yes but you'll have to switch to the late style primary injectors - o ring seal on the injector rather than the housing.

Quote:
Originally Posted by -=Jeff=-
also how about the plenum?
Yes again with a few alterations. Block off EGR, change a few vacuum fittings, etc.
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Old 01-09-2008   #3
-=Jeff=-
 
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Default Re: Injector Housing Question

Quote:
Originally Posted by Locobob
Yes but you'll have to switch to the late style primary injectors - o ring seal on the injector rather than the housing.



Yes again with a few alterations. Block off EGR, change a few vacuum fittings, etc.
Okay so the 93-95 IH with a 90 Plenum would work?

I assume you can smooth out more? or less with the 93-95 IH when porting?
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
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Old 01-10-2008   #4
Locobob
 
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Default Re: Injector Housing Question

Quote:
Originally Posted by -=Jeff=-
Okay so the 93-95 IH with a 90 Plenum would work?

I assume you can smooth out more? or less with the 93-95 IH when porting?
The early castings are better for porting since the o-ring for the primary injectors is high in the housing hence the boss can be pretty much eliminated.
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Old 01-10-2008   #5
-=Jeff=-
 
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Default Re: Injector Housing Question

Quote:
Originally Posted by Locobob
The early castings are better for porting since the o-ring for the primary injectors is high in the housing hence the boss can be pretty much eliminated.
Makes more sense now.

is the OE Dia of the 93-95 bigger Dia then the 90-92? (not counting the injector boss)
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
-=Jeff=- is offline   Reply With Quote
Old 01-10-2008   #6
Locobob
 
Join Date: Jan 2004
Location: Portland, OR
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Default Re: Injector Housing Question

Quote:
Originally Posted by -=Jeff=-
Makes more sense now.

is the OE Dia of the 93-95 bigger Dia then the 90-92? (not counting the injector boss)
The late castings have a larger diameter due to additional machining by the factory, 34mm vs 33mm approx. This extra machining does not go all the way through the port however - only about 2in down from the top.
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