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Old 06-25-2008, 12:19 PM   #1
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Question LT1 without a EFI or opti???

This one is a little off topic, I suppose. I have a 1964 Chevelle SS with a 283 on its last legs. I also have a 68 chevy truck my dad and I swapped a 94 LT1 and 4L60E into. The truck is about to be junked, and Iíve been wondering if it was possible to put the LT1 minus the ecm in the chevelle. I really don't want a wiring harness or ecm in the chevelle. The car has a Muncie m20 I want to keep. Iím sure Iíve seen a carb intake for the LT1 somewhere before. Iíll have to find that again. I was really curious about removing the optispark. Can I just leave it off? Will the LT1 oil pump be a problem? If I keep the LT1 water pump, the reverse flow wonít be a problem will it? Iím not set on using this motor in the car; I just would like to use it, since I already have it (the motorís tip top as well).

By the way, I would love it if someone could give me a link to a suitable intake (and any other necessary parts) for this swap. Thanks!
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Old 06-25-2008, 12:28 PM   #2
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Go to summit racing and type this part # in
NAL-24502592
A regular chevy HEI distributor will work on that.

I think GMPP offers a block off plate for the opti drive that also has a timing reference on it. Not sure if they still make it. You could just weld the hole shut though.
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Old 06-25-2008, 02:06 PM   #3
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Use to be a common swap for Gen II into Gen I car.

U will need electric fan(s) and a fan shroud for the radiator as the LT1 wtr pmp has no way to drive a fan and fan clutch. Also a controller to operate the fan(s).

I'm just guessing but think any '87 & later model intake with the correct bolt pattern would work - but the water crossover passage and T-stat housing would have to be ignored.

I have ideas for this swap also,
cardo0
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Old 06-25-2008, 04:07 PM   #4
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It is kinda pointless to use an LT1 sans the EFI. Might as well
sell the LT1 and get a carbed crate motor.

Tom
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Old 06-25-2008, 04:43 PM   #5
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I might just do that. I didn't even think about the fans. My truck has the camaro rad and fan setup in it. Ah well. anybody want an lt1/4l60? haha!
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Old 06-25-2008, 05:56 PM   #6
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I agree on the go gen 1 if carbing it. I just wanted to post to say ther IS a way to have a mechanical fan on an LT1, the tow package b-bodies had mechanical fans, bracket that bolts over the waterpump and a second little serpentine belt and tensioner.
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Old 06-25-2008, 06:18 PM   #7
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Go to Crate Engine Depot site:
http://www.crateenginedepot.com/store/search.aspx
put LT1 in the search window and you'll see an carb intake manifold and a few new Goodwrench lt1 crate engines for sale . They are longblocks and one says it's the P Camaro or Corvette motor for 92-94 so it should have the aluminum heads.
The intake manifold looks pretty nice.
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Old 06-25-2008, 09:57 PM   #8
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According to "How to Rebuild LT-1/LT-4 Small-Block Chevy Engines"; the part numbers for the 4-barrel intake manifolds are.....

LT1 - 24502592
LT4 - 24502574

For the cover in place of the Opti-spark....

GM cover plug - 12367600

Throw the numbers into www.gmpartsdirect.com and you can see pictures of them.

"How to Rebuild LT-1/LT-4 Small-Block Chevy Engines" also says.....

"Because the original torsional damper is 7 1/2" in diameter, it won't clear the timing tab on the front cover plug plate. If using a rear mount distributor, you'll need to install a 0.184" x 0.680" key into the crank snout's front key slot and obtain a small-block Chevy zero-balanced damper with a diameter of 6 3/4"(commonly available). This will completely replace the OE hub adapter and damper."

The book documents how to rebuild the LT1/4 to stock fuel injection, but they also documented how to convert it to a carbed application. Excellent book.

This may be useful too....
http://www.edelbrock.com/automotive_...2000/24206.pdf
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Old 06-26-2008, 07:16 AM   #9
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new camaro mag, has a build up of lt1. Block off plate on it, using a electric water pump, GM intake for carb and dist. at rear. Great article. Thinking of using spare lt1 as my play motor in a g body. No Pwr steering a/c etc etc , straight motor electric WP and electric motor for alt. Let her fly with carb and dist. see what happens
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Old 06-27-2008, 01:28 PM   #10
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Where to get a mechinical fan bracket?

Quote:
Originally Posted by 96capricemgr View Post
. I just wanted to post to say ther IS a way to have a mechanical fan on an LT1, the tow package b-bodies had mechanical fans, bracket that bolts over the waterpump and a second little serpentine belt and tensioner.
Thx for posting Dwayne as i did not know this. I would prefer the mechanical fan for a GEN II conversion.
Looks like the Buick Roadmaster station wagons and the Impallas with the GEN II blocks had this bracket. Can i still buy the mechanical fan bracket from the GM parts houses?

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Old 06-27-2008, 01:28 PM
 
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