Alwyn678

Why????

Bills17n72

they also have it in the 84,had mine for 20 yrs. now and never had a problem!!!

LuckySeventySeven

I'm guessing they used an intake manifold where a throttle body on the right side fed the left bank of cylinders and visa-versa for the other bank. The advantage would be longer intake runners than would otherwise fit under the hood. But that would be an advantage at high RPM with a big cam with valve overlap. So it really does not fit with the performance of the motor. But to answer the first question, it's a throttle body to cross over and feed the other side of the engine cylinders. (One for each side).

I could be wrong just guessing.

Greg

As for your "Why" question, the technology jumped ahead pretty quickly in that era. Tuned Port Injection came out immediately following the Cross Fire and it was a much better system. I was working for the General in the early 80's and we were inundated with rough idle complaints on the Cross Fire cars. It's just the way they were. If TPI hadn't come so quickly, GM would have probably spent more time refining the Cross Fire and it wouldn't carry the stigma it does today. I've owned Cross Fire cars and when properly tuned/maintained they are fine. Corvette stigma/mythology can haunt these cars for years. A lot of people still believe '68's were the worst car ever built, simply not true but a little bad press can hang around for a long, long time. '82 is a great Corvette and last of an era, enjoy it.

Dynra Rockets

GM designers addressed that by making the ports incredibly small. The crossfire manifold is not good for high rpm from the factory. Google images "crossfire intake manifold"

Easy Mike

http://www.superchevy.com/features/1...s-illustrated/

Gale Banks 80'

It is a throwback to the 1960's with the Cross Ram Manifolds. A Cross Ram manifold is a Tunnel Ram layed over so it can fit under a Hood. They were intended for Road Race. Mickey Thompson , Edelbrock and Offenhouser made them. GM even made and offered them in the Gen 1 Z-28 Camaros a very rare and collectable option. Mopar and Fords were not left out either. So GM used that design, re named it Cross Fire used a couple of TBI units from the Cadillac parts bin and made a high torque small displacement motor that could pull high gear ratios down the freeway and get good gas millage. They beat the EPA Gas Guzzler Tax and made Emissions. That's what life was all about in the early 80's.

LuckySeventySeven

Wow! That picture says a lot! I wonder if you can port those manifolds out, run maybe two reasonably sized throttle body fuel injection units, the big cam, wide open heads, and basically replicate the 302 z28 setup from the late 60s. Hide it all under the stock engine dress-up and have a high rev sleeper. I guess to take advantage of the shorter stroke and high rpm you would need to run a light weight valvetrain with solid lifters and high compression. The obvious sound would give it away.

7T1vette

Better intake manifolds and larger throttle body injectors are already available for the CrossFire engine. But, you have the right idea.

leadfoot4

Look up 'Eddie Motorsports'..........