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Old 11-23-2012, 08:44:42 AM   #1
70 gsconvt
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Shoud I buy this L94 engine?????

I have an opportunity to get a L94 engine out of a newer Escalade that was wrecked for $2800. Engine has 28K miles and comes with front acc., harness, and computer.

Engine has DOD/AFM and VVT. It's a 6.2 all aluminum engine. I'm just wondering if the DOD/AFM and VVT make the engine worth it? Is it expensive to eliminate this stuff? I'm of course greedy when it comes to HP and would not be able to leave it alone in it's stock form of 403 hp and 415 tq. Perhaps "just" a supercharger on top with a new cam.

I'm looking to put this in my '78 Z28 backed by a T56 trans. Any thoughts?
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Old 11-23-2012, 09:58:45 AM   #2
Leonards78LT
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It would be best to keep the engine in stock form. Eliminating the DOD and VVT would be expensive and will require a differently formatted ecm to make it work.
It sounds like you found a great deal!
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Old 11-23-2012, 11:17:56 AM   #3
70 gsconvt
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I did some looking around and found that Texas Speed & Performance sells a complete delete kit for $389. to get rid of the DOD/AFM.
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Old 11-23-2012, 11:52:14 AM   #4
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VVT would be a good thing, right? I always understood that it provided more torque down low. Why do people want to delete it?

I can see why you'd want to delete AFM/DOD though.
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Old 11-23-2012, 12:15:16 PM   #5
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So a couple of things here, first Leonard is right, if you delete AFM/VVT you will need a custom tune for the ECM. Which you will need anyway if you plan on modding the 6.2, so it's a wash

Second, if you are going to remove AFM/VVT and mode the 6.2, possibly adding boost, might I suggest you find a 6.0 out of a truck. They are cheaper, don't have the afm/vvt as far as I can remember, and the heads are better for boost. Oh, and they are cheaper.
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Old 11-23-2012, 01:42:39 PM   #6
70 gsconvt
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Well, I was going to keep the VVT as I've read and been told that it does improve torque.....a lot. I didn't realize that that eliminating the DOD/AFM involved new lifters, etc. But I guess it makes sense.

I've always considered a LQ4/LY6. But then I would just stroke it to a 408, with a FAST intake/tbi, and cnc'd L92 heads. Getting this L94 seemed like possibly an easier route. Just slap a supercharger and new cam in it and wahlah, 500 rwhp. Cost would be very similar, about $10K after all was said and done. I would have the advantage of being 100 lbs. lighter up front with the aluminum block.

I know the iron block is more desireable in boost applications. But I'm not looking to push 25 psi through the engine and make 800 hp. I'm figuring more like 5-8 psi with either an Edelbrock supercharger or Magnacharger kind of thing.
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Old 11-23-2012, 03:13:15 PM   #7
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you can get a 6.0 out of a truck for a grand. Add a 402 rotating assembly from Texas Speed for 2K and you are just getting to where you would be with this engine. Then run the truck heads and throw a supercharger on it.

I sort of understand where you are coming from weight wise, but, I also know the suspension in the 78 was made for an iron block, so it's not like the front will be sagging with an iron block in it.

That said, it is your money, and if you want the Aluminum 6.2 with VVT then certainly go for it.
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Old 11-23-2012, 03:37:45 PM   #8
Todd80Z28
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What's the difference between the L94 and L99? Truck/car manifold? No VVT on L99, or is there?
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Old 11-23-2012, 05:35:59 PM   #9
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L99 has car intake
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Old 11-23-2012, 09:00:00 PM   #10
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Why would the rectangle port heads be bad for boost? There's nothing wrong with using those heads on a boosted motor - forced induction loves volume, I would think they would be a great choice. Just need an LS3 manifold to stuff it all under the hood.
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Old 11-23-2012, 09:04:27 PM   #11
camarochevy1970
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I never said they were bad i said the truck heads were better. They have a thicker deck surface and can take more pressure. And with the slightly larger combustion chambers lower compression a touch allowing for more boost.
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Old 11-23-2012, 09:06:23 PM   #12
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However if rectangle port heads are your thing then i certainly advise running on a larger displacement engine. The large intake valve get shrouded by a 4 inch bore cylinder so you either bore or go to a 6.2
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Old 11-24-2012, 08:55:00 AM   #13
70 gsconvt
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Quote:
Originally Posted by camarochevy1970
you can get a 6.0 out of a truck for a grand. Add a 402 rotating assembly from Texas Speed for 2K and you are just getting to where you would be with this engine. Then run the truck heads and throw a supercharger on it.

I sort of understand where you are coming from weight wise, but, I also know the suspension in the 78 was made for an iron block, so it's not like the front will be sagging with an iron block in it.

That said, it is your money, and if you want the Aluminum 6.2 with VVT then certainly go for it.

I'm not concerned about the suspension as that's all going to get replaced also with all the good stuff (control arms, real coil-over shocks, etc). Just figured that if I'm going to go for the "wow" factor of an LS-swap, I'd go all the way and have the all aluminum engine.

As far as compression goes, if I built a stroker, I'd put it near 11 to 1. I didn't look up what the L94's is, but I'd bet it's similar. That's why I'd stick with a supercharger that is made to go on an otherwise stock engine. Just stick a bit better cam in.

My biggest thing is that the engine is already together and only has 20-some thousand miles on it. All I would need to do is pull the timing cover and intake and I could actually keep the entire alphabet the engine has. TSP has cams made to work with the DOD/AFM. Not that I'm concerned with fuel economy at all with this car. It's just going to be a fun car. Just hopefully a fun car that'll do mid-11's in the quarter and get to 150 mph in a hurry.
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Old 11-24-2012, 01:04:37 PM   #14
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Check this out, might be helpful.

http://caddyinfo.com/wordpress/the-c...c-engines-l94/

I would just put it in as-is and forget the blower. Give it a decent cam upgrade and an LS3 intake so it'll fit under the hood, and it will make 500hp pretty easily.
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Old 11-24-2012, 01:07:18 PM   #15
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I think he wants 500 to the wheels. A cam and ls3 intake alone wont do that
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