GM Fuel Injection on Crate 350 Engine
12-08-2011, 07:26 AM
#1
Burning Brakes
Thread Starter
GM Fuel Injection on Crate 350 Engine
How can I tell if a particuliar 350 engine will accept the GM FI? Does the block matter or just the type of heads. As you can tell I know nothing about it. The car I am looking at has a new crate 350 with 2 fours and I would want to convert to FI.
Thanks,
Richard
Thanks,
Richard
12-08-2011, 08:06 AM
#2
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Also, what version, or style, of 350 do you have?
Tom Parsons
12-08-2011, 01:21 PM
#3
Burning Brakes
Thread Starter
Let me see if I can find out what type of 350 crate engine this is in the car. I was wanting the type of FI that you would get from GM with one of their 350 crate engine options at GM Performance.
12-08-2011, 01:54 PM
#4
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Then that would be a TPI (Tuned Port Inj) unit.
The Gen 1 bolt hole configuration on the intake side of the heads changed in 86 (?). Thus, the type of manifold bolt hole setup is also different.
And then there are the LS engines which are also different.
Tom Parsons
The Gen 1 bolt hole configuration on the intake side of the heads changed in 86 (?). Thus, the type of manifold bolt hole setup is also different.
And then there are the LS engines which are also different.
Tom Parsons
12-08-2011, 02:19 PM
#5
Le Mans Master
Not entirely correct. The 87-91 Corvette aluminum L98 TPI heads used the centerbolt valve covers, but they had the same intake bolt pattern as the 55-86 small blocks. Those heads are also used on the ZZ4 crate engine, so if you have a ZZ4, any early small block intake will bolt on.
12-08-2011, 02:22 PM
#6
Le Mans Master
The GM performance parts small block FI unit is called a Ram Jet. It was never used on a production vehicle, only sold though GM performance parts. You can buy a Ram Jet 350 from GMPP with that intake on it.
12-09-2011, 09:33 AM
#9
Burning Brakes
Thread Starter
12-09-2011, 09:55 AM
#10
Le Mans Master
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St. Jude Donor '12
By the way- prayers go out to the Officer killed at Va. Tech yesterday.
Last edited by vettsplit 63; 12-09-2011 at 09:57 AM.
12-09-2011, 10:07 AM
#11
Burning Brakes
Thread Starter
Yes they will fit, although I have some reservations about my setup with them (11-1 domed pistons). I think the vortecs and in particular the fast burn heads are designed to use flat tops, and I don't know how efficient they would be, or if it would require some clearincing in the chamber. Arizona Speed and Marine does the Ram Jet set up with the air meter on the side ala the early Rochester, and I think you can even use the air filter setup to make it look very similar. If they made it to fit the early style heads I'd change in a second.
By the way- prayers go out to the Officer killed at Va. Tech yesterday.
By the way- prayers go out to the Officer killed at Va. Tech yesterday.
12-09-2011, 10:23 AM
#12
Burning Brakes
Another (potential) issue with the Vortec heads is that they sit higher than the old ones do, so hood clearance needs to be checked. I know that people have successfully put Ram Jet 350s into C1s, but I don't believe it's a "gimme" that it will fit with stock motor and trans mounts in all cases. A manifold and carb setup on Vortec heads needs to be similarly checked.
On the exhaust side, stock manifolds apparently will bolt up, but the manifolds may be raised a bit too. Ports may also mismatch to some degree, which might be correctable by grinding the manifold. I have been told (don't know myself) that "Fast Burn" heads have exhaust ports that are too big to match well with stock ram horn manifolds.
On the Arizona Speed version of the Ram Jet, it looks like they beveled the forward edge of the plenum for hood clearance. I think that unit goes for something like $4K, but it sure does look cool:
On the exhaust side, stock manifolds apparently will bolt up, but the manifolds may be raised a bit too. Ports may also mismatch to some degree, which might be correctable by grinding the manifold. I have been told (don't know myself) that "Fast Burn" heads have exhaust ports that are too big to match well with stock ram horn manifolds.
On the Arizona Speed version of the Ram Jet, it looks like they beveled the forward edge of the plenum for hood clearance. I think that unit goes for something like $4K, but it sure does look cool:
12-09-2011, 01:54 PM
#13
Melting Slicks
The regular Ram Jet will not clear. A friend of mine got I believe the first one from Arizona Speed and Marine for a C2 and worked with them to sort it out.
12-21-2011, 03:03 PM
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Somewhere right here in the past, there was someone who combined the old Rochester FI setup with modern day electronic FI/nozzles.
It LOOKED like an early FI unit, but had the hi-tech features of modern day functions. Pretty much the best of both worlds. The owner posted pictures, but UNFORTUNATELY I didn't copy/save them. DUH!
So, if you're the owner of said FI system, would you be kind enough to post some information and pictures again.
Tom Parsons
It LOOKED like an early FI unit, but had the hi-tech features of modern day functions. Pretty much the best of both worlds. The owner posted pictures, but UNFORTUNATELY I didn't copy/save them. DUH!
So, if you're the owner of said FI system, would you be kind enough to post some information and pictures again.
Tom Parsons
