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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> how can i tell if it's a LT1?
Post Info TOPIC: how can i tell if it's a LT1?
jonathanD


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how can i tell if it's a LT1?
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hey guys i came into a very very good condition 1994 caprice engine (for free)  it's completly apart and i know what i needs  like it's almost perfect no ridge in the bore and  almost no scratchs in the bore this thing was an aswome score soo how can i tell if its an LT1 engine????



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1967 parisienne 

 
427carl


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all LT 1's are all black



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jonathanD


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427carl wrote:

all LT 1's are all black

 Really?

 



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1967 parisienne 

 
4SPEED427


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Is there a casting number on the block?

Crazy as it sounds, I believe it will have "327" cast on the side of the block.

Let me know if you need more info.

By the way, the "baby" LT1 is a 4.3 litre V8 that looks identical to an LT1 on the outside.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
StriperSS


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If you can see the car it came out of, look at the serial number. An LT1 car will have a 'P' in it, the 4.3 liter will have an 'X'.



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4SPEED427


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Just read your post again. I missed that it is all apart already.

4" bore is an LT1, 3.75" bore is a 4.3.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
jonathanD


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the engine is on my deck right now ( no wonder i get complaints) but im having trouble finding the numbers it's a mixture no light at all and a flashlight thats dying

 



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1967 parisienne 

 
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4SPEED427


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But if the heads are off, just see if the bore is 4 inch or 3 3/4 inch. Simple, even with a tape measure.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
jonathanD


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thanks carl it has a 4 inch bore =)



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Pontiacanada


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So Jonathan, how many engines do you have now?



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Prince Edward Island

'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.

4SPEED427


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Nice score Jonathan. How complete is it? The LT1's use some unusual pieces so it's a little tough to use if you don't have the accessories with it.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
2drpost


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jonathanD wrote:
427carl wrote:

all LT 1's are all black

 Really?

 

 and so is every other chev engine since 1986



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eeluddy


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These engines have an electric water pump and "Optispark" ignition behind the pump. Aluminum heads also.

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68post


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eeluddy wrote:

These engines have an electric water pump and "Optispark" ignition behind the pump. Aluminum heads also.

 The Caprice LT-1's used cast iron heads.



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Barry -

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jonathanD


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Pontiacanada wrote:

So Jonathan, how many engines do you have now?

 

5 now =) it has cast iron heads and all the parts are there =)



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68post


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In case you don't know JD, the LT1 is a Gen II small block. If you plan on running that in your 67 you need a computer, and everything else that goes with it. You might want to sell it to raise some funds for the project. wink



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Barry -

2 x 68 Beaumonts, 1post, 1 hardtop (projects)

2x 65 Chevelle 300 deluxe (projects)

69 SS396 300 deluxe post

 

 

 

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73SC


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On top of what Barry mentions you will have to meet emmission standards for 1994 if you use it. The best idea it to get rid of it as Barry suggests. Its a money pit so put it out of your mind.



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
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4SPEED427


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Jonathon, if you want to get ambitious, and it's not a huge deal, you can convert it to a carb and a regular distributor. You just need to buy an intake for an LT1 that takes a carb, and the distributor hole is there in the back. You just have to plug the hole in the front cover where the Optispark (distributor) is one. The water pump actually drives off the front of the cam, a superior design as far as I'm concerned. Because of this, if you break your fan belt, you can drive until the battery goes dead because it will never overheat, regardless of the fact that you have no belt, thus no alternator, power steering or a/c compressor!

However, if you guys do indeed have emission laws that state it has to meet 94 specs, that sucks. We have nothing like that here so I'm not familiar with that at all.

And yes, only the big cars had iron head LT1's, all the other applications used aluminum heads. And for the record, the ports in the iron heads are actually superior for performance I'm told.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
73SC


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That is the reality here in Ontario Carl. Jonathan would be looking at putting catalytic converters on the car in addition to getting the computer. Putting a carb on it would surely be a FAIL and $450 ticket.  Jonathan lives in the hot zone that dualquad Pete writes about all the time.

 



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
4SPEED427


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Youch, what a pain.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
73SC


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All of a suden there is a market for AIR systems.



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
4SPEED427


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Yeah, I bet.

Is this a common thing, to be checked? Likely in summer at the shows etc?

No exemption for antique cars or anything? I know I've seen you guys talk about this here on CP but I guess it never really sunk in.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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73SC


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Carl Stevenson wrote:

Yeah, I bet.

Is this a common thing, to be checked? Likely in summer at the shows etc?

No exemption for antique cars or anything? I know I've seen you guys talk about this here on CP but I guess it never really sunk in.

 Pete has most of the stories about checks but yes they usually set up near cruise ins. I have seen a set up once in Toronto but in such a big place that doesn't mean it is not more common.  Normally there are local Police and Ministry Law Enforcement Officers doing the road blocks and laying charges.

For the most part they check '75 and later cars because this is when most of the pollution control equipment became mandatory and the legislation was written. Vehicle must confrom to regualtions in effect at time of manufacture. In the case of engines these must conform to rules and regs as and when manufacturer. Road side checks are usually visual in nature, looking for AIR, Catalytic  converters, Charcoal canisters,. PVC etc....



-- Edited by 73SC on Tuesday 7th of February 2012 09:39:52 AM

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
jonathanD


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i guess ill resale it... whats it worth? completly apart and missing the intake throttle body and all the acessories?



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65wagon


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they actually would spend the time to bust someone when the percentage of older vehichles is so small, and most of the time we try to improve over the original, im the last person who want to spend a tone on fuel so i want the engine to be as efficient as posibble



-- Edited by 65wagon on Tuesday 7th of February 2012 05:34:18 PM

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