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Crate motor on TBI

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I went to Scoggin Dickey to research crate motors.
I saw this motor, which I've seen in Jegs, 330 HP, 4 bolt. I figured I could add a TBI manifold for vortech heads nd be good to go

Crate motor: 330 HP

Scoggin says it can't be used for TBI. They say I need this 280 hp, 2 bolt :p block that is $1,000 more.
TBI motor

WTF, is it because of emissions? I thought all the "extra" sensors for a TBI motor were all in the manifold.

:help: :help: :help:
 
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WTF, is it because of emissions?

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I can only imagine that you are correct, since on the main crate engine page, they have this warning: "Unless specified by GM, these engines should only be used in 1973 and earlier pre-emissions vehicles."

I'm *sure* everyone buying their 350 crate engines are putting them in '73 and earlier vehicles. /forums/images/graemlins/rolleyes.gif
 
i agree on the smog junk. the only thing i can think of is the egr for vortec's come off of the exhaust manifold...maybe the tbi intake for vortec heads fixes that?
 
Keep digging around on their site. I think they used to offer a 350 HO with all the goodies required to bolt a TBI on top of it. Maybe it was in their engine shop section... You'll still need a bigger throttle body and a custom chip however. Your stock TBI stuff just wasn't designed for a 330 HP engine. They can probably set you up with those parts as well.
 
I talked to a GM rep at a carshow once who said the engine had the wrong cam for tbi, but if replaced, it would work. You would need the intake manifold for vortech heads.
 
Yup. The cam in the 330 hp HO 350 Has too much duration for the stock chip in the computer to handle.
You could use that engine but you would need to get a new chip burned for that cam. A bigger TB would also be a good idea. The stock 1 11/16" bore TB is only good for around 300 hp.
The 2" bore TB from a 454 will work great.

You could also put a bigger TB on the sdpc2000 TBI performance engine to make more power. SD rates those engines with the stock TB. Flow more to them and they should make over 300 hp. 2 bolt main blocks aren't all that bad. They will handle 300-350+ Hp No problem. I have built some nice 2 bolt main engines that lasted a long time.
 
I'd still lke the 4 bolt for insurance.

I have a 454 TB that I'm going to clean up a little and smooth out. I also plan on getting the vortec style intake and porting it a little to match the TB.

I really don't see the point in paying a grand more for the "TBI" motor if a slightly smaller cam is all I need.

Anyone with a ZZ4 or other GM performance motor and a TBI??? /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/ears.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/1zhelp.gif
 
It has Vortec heads so you need a Vortec intake, but other than that you're good to go.

You could probably build your own 383 a lot cheaper than $4000, since stroker kits are so cheap, but the GMPP one has the warranty
 
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