I had found a few resources that state that the 85 corvette ran a lower fuel pressure than any other TPI application. I seem to remember that it might have also had a different injector size. I know this is a strange request but I cant seem to find a single one of these resources now. Does anyone else know of this 85 vette only oddity? I seem to remember it being an odd size for a 350, like 19 pounds or something like that.

 

GM ran almost all the early port setups(ie 85 only, or close to it(buicks excepted)) at roughly 35 psi. Due to hot start issues and the ensueing driveability issues this was later raised to the "standard" 43.5. All the early cars were recalled and refitted with new updated chips and a new regulator to bring the psi up to 43.5 like the newer cards
later
Jeremy

 

I had no idea, cool thanks

Im mainly trying to figure out what the oddball size of the injectors they had was. Does anyone know?

 

far as i know, they were 22#

 

85 vettes supposedly have 24 lb injectors, and are the only (early c4 anyway) year to have factory forged pistons too. A CF member recently disassembled his 85 and had factory TRW forged.

 

so they have 24's instead of the 22's the rest of the years had?

 

Yup, thats what I have heard. I will try to find something and post a link if I am successful.

 

well that seems like maybe it was the "weird" size that I couldn't remember, thanks alot

 

Yes, the 85 Vette used 24# injectors running at 36 PSI, VS the 305's 19# @ 43 PSI. And the later years all used 22# @ 43 PSI (in 350's)

 

thanks guys that sounds just like what I was trying to remember. I will apply this info in the repairs/modification of the vette.

 

My 85 vette has 24 lbs injectors with a stock fuel pressure of 39 psi with the vacuum line disconnected from the regulator.

 

Parts counter stuff all have the same part number for the replacement injectors. They say it's the same bosch number for 85 vette as it is for the camaro and newer tpi vettes . So waht's up with that?

 

Heh, they also said that a double stacked diaphram EGR valve would fit my TPI engine. Total heighth of teir EGR is about 5" and the total clearance between the base and plenum is about 3"....In short, they all have cranium rectumitus.

 

parts counter also says there are no 1991-1992 camaro RS's with 350

parts counter also says that the piston rings in my 91's 350 are 5/64", 5/64", 3/16" instead of the 2.0mm, 1.5mm, 4.0mm they actually are.

 

I can't explain the rings but the RS I can. First of it isn't an RS. It's actually a z28 with the RS appearance package. So the way I see the B4C's is just a z28 with RS badges and spoiler, everything else is Z28 standard. A nice sleeper .
Why are your rings metric?

 

that makes no sense, or better yet you tell me which makes more sense:

it is a Z-28 with RS badges, and without the Z-28 hood, and without the z28 hood scoops, and without the Z28 decklid, and without the Z28 wing...

or

it is a RS with a 350

not a hard one to figure

metric rings? well I cant claim to be an expert there but some of the resources I have checked say it is a 90 up thing for cars and trucks with 350's

 

I was under the impression that the B4C was a 1LE optioned car (z28 only) so it had upgraded suspension, wheels, brakes, etc. The RS was only the apperance, nothing else. The struts were bilstiens (not an RS option, only Z28). See where I'm coming from? So it's like the glass half empty or half full. I see cars as a drivetrain/suspension and then body, not vice versa like most. Then again I'm a VERY technical person.

 

Interesting about the '92 MY, the RS was the base model. It wasn't any option at all, just the most basic Camaro that could be purchased.

The B4C is a law enforcement option. Else the only way to get a 350 was to purchase a 'lettered' car.

RBob.