First i want to say hello to all the gen three fans/enthusiasts. I recently acquired an 86 Irok Z28 in a trade. It has the crosfire fuel injection motor. The previous owner was having trouble with too much fuel etc. I was told it was putting fuel through the exhaust. I've done a small bit of research which lead me to believe that the "cold start" injector is the issue. Does anyone now or has anyone heard of this issue? His solution was to just buy a brand new intake and swap it to a carborated setup. That being said I have a 350 that's bored .40 over with a 487 cam and gen one vortec heads. I want to drop this engine into the z28 but i was going to use the stock fuel injection setup. Does this setup sound good? Will it even work well and if so does anyone know of a similar setup being ran? I would love to.hear what potential power im looking at. Any info would be very much appreciated.

 

86 M/Y didn't have crossfire, it had tpi as an option. Your issue can be resolved, just need to do some checking.
Check the fuel pressure & bleed down rate. If it bleeds down fast (when engine is off), then a fuel pressure regulator or injector is bleeding down into the engine.
A coolant temp sensor that is out of range could cause a very rich condition.

 

Thanks for the input. Im new to the gen three camaros. I thought that's what that ram air type setup was called. The issue is the engine is torn down. IE intake is off and he was going to put the new intake with a care on. I have all the parts new and original. What im wanting to know is if the original intake will work on the built 350 i have that's going into the car. I could use the carb setup but i thing the fuel injection would be a lot more fun to drive mated with my built 350.

 

The vortec heads have a different intake bolt pattern then the stock 86 tpi intake, so you'll need a vortec tpi base.
To get the tpi to run at its best (w/ the cam & bigger engine) you'll need to get it tuned. Most likely have to get a chip programmed. I'd do some reading in the engine swap section, look for the swaps that did tuning.

 

The 86 FI setup will "bolt to" the motor, if the heads aren't really the Vortec ones. But "bolt up" and whatever somebody's definition of "work" might be, could be 2 very different things.

It may or may not be happy with whatever cam is actually in it.

Post some actual specs and part #s (preferably the cam part # and head casting #) and we can tell you right away what the odds of success will be, as well as a guess at the power output. However it will only be a "guess", and will almost certainly be higher than reality, probably ALOT higher than reality. TPI has a way of humbling those who swap it onto random motors that weren't optimized for it (it's bad enough for motors that ARE setup to its liking).

 

I think CrossFire was used only 82-84, so unless it was retrofitted or non-original engine then it wouldn't be.

Here's a (poor) picture of what CrossFire looks like:



vs. a TPI setup:

 

I always thought one day I'd put a real engine in my Z and that the TPI engine would be a great transplant into my pickup/truck with all that low and mid-range torque, but I've yet to play that out.

 

Yeah I've got the tpi set up. I also read that they had a select few with the 350 in 86.Im sure mine is not because it never would have been traded to me for a 91 s10 w/a 350 swap. Are there any definat ways to tell what I've come into with this car? I looked up the vin and i remember seeing something about a third brake lightand mine is mounted on the back glass on the outside. But from what I've found its a true Irok Z28 that was made in the us in California. Also i think the interior was switched because I've got red and white leather seats and i was told leather wasn't an option in 86? As far as part #'s etc im working on that now. I also received the engine in a trade. I can't find what the block was from the vin plate on it only says Z4. Its bored .40 over with brand new flat top double eyebrow pistons .

 

Nope...

A coupla test mules, that never saw the light of day; but none were ever sold to the public. You don't have to worry about having one like that.

Not sure what "Irok" is; all I know of that's associated with these cars, is when Chevy, from the start of the 85 model year through 12/31/1990, licensed the initials of the International Race Of Champions series, which ran identically-prepped stock cars on oval tracks, and invited champions of various series, including NASCAR, CART, IMSA, SCCA, at some of the big NASCAR tracks like Daytona and Talladega. About 4 or 5 events per year. Unfortunately the series went bankrupt in about 2002 or 2003 and their web page disappeared a couple of years later. Too bad, they had a few pics of these cars when they were running em; Dale Earnhart, Neil Bonnett, Darrell Waltrip, Terry Labonte were a few of the drivers that were participating at that time. It was a cool series to watch even if a bit .... pointless.

Look at the 8th digit of the VIN. H = base-model 4-bbl carb 305, RPO LG4; G =the "HO" motor, the hotter 4-bbl 305, RPO L69; F = TPI 305, RPO LB9.

Doesn't matter what the block is "from"; whatever magic it might have carried over along with it (or not) has long since evaporated. Not an avenue of inquiry worth pursuing. Pretty much, a block is a block is a block is a block.

Anybody can put any kind of pistons they want into an block they want to. All blocks are equal.

What matters NOW is the head castings and the cam.

Can't say about the seats; don't know of any red & white seats, leather or otherwise, that could have come in it. But since seats out of anything up to a 2002 F body will bolt right in, could be anything. Could even be a re-cover job. But probably not, as that costs more than just getting ones out of a junked car. Most likely just something or other out of a newer car.