What do you think? - Impala Tech
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post #1 of 33 (permalink) Old 02-22-2011, 02:28 PM Thread Starter
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What do you think?

I am looking at a 1962 Impala SS with a Corvete fuel injected engine transplant. The rest of the car has been restored very nicley. What do you guys think about these transplants. I am new to Impalas. Thanks
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post #2 of 33 (permalink) Old 02-22-2011, 08:30 PM
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I see nothing wrong with it.
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post #3 of 33 (permalink) Old 02-22-2011, 09:09 PM
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Easier to start and better fuel economy. A Corvette valve cover doesn't make it a Corvette motor though.

That and there were four different Corvette electronic fuel injected motors. The much unloved small block Chevy Cross Fire 350 twin TBI (affectionately refered to as the Miss-Fire), the LT-1/LT-4 second generation of reverse cooled small blocks, and the third generation LS-x series of engines (which I will wager you have a variant of).

It will pay you to learn which LS you have (1, 6, 2, 4, and the very desirable LS-7) as they are all different in valve timing, size, and components. Also there are four families of each engine (they are all modular so one engine fits four platforms) which will determine your accesories and power.

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post #4 of 33 (permalink) Old 02-22-2011, 09:43 PM
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Dave, you are forgetting a pretty historical piece:


Two doors, four doors, wagons, and ragtops.
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post #5 of 33 (permalink) Old 02-22-2011, 10:12 PM
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nice picture Jay!

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #6 of 33 (permalink) Old 02-22-2011, 10:14 PM
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Oh, and Chad, totally acceptable especially along with other updated drivetrain or suspension items.

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #7 of 33 (permalink) Old 02-22-2011, 10:37 PM
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Yeah, Chad... we need PICS
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post #8 of 33 (permalink) Old 02-23-2011, 09:22 AM
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They all run better than a 283
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post #9 of 33 (permalink) Old 02-23-2011, 09:34 AM
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Non original motor hurts the value in one way. Nicely done motor upgrade helps in another way.

http://www.impalas.net/forums/image.php?type=sigpic&userid=521&dateline=14693626  69
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post #10 of 33 (permalink) Old 02-24-2011, 04:36 PM Thread Starter
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The Corvette engine that is in is a 1997 LT-1. Does anyone have any experience or opinion about that engine?
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post #11 of 33 (permalink) Old 02-24-2011, 05:39 PM
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1997 was the first year for the LS1 in the Vette. The LT1 is a great engine, but the LS1 is better.

Perhaps they have the year wrong. They are very easy to tell apart. This is what an LT1 will look like in a big car:



And this is an LS1:

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post #12 of 33 (permalink) Old 02-24-2011, 07:28 PM Thread Starter
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Im sorry they were mistaken. The engine is a 1992 LT-1 Does anyone have any input?
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post #13 of 33 (permalink) Old 02-24-2011, 07:38 PM Thread Starter
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1992 LT-1 Corvette In a 62 SS?

I am looking at purchasing a 1962 Impala SS with a 1992 LT-1. Does anyone have any opinion or experience on this engine? Thanks
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post #14 of 33 (permalink) Old 02-24-2011, 08:15 PM
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I have lots of experience with the LT1. 1992 was the first year, and it was MAP controlled, batch fire. I would suggest upgrading it to the later MAF controlled sequential firing. Not really necessary, though.

A strong engine, good power, good economy. Great flowing (for a traditional small block) heads. Long lasting, reliable. Responds to basic mods in a big way. Optispark is more expensive (and difficult) to service than a regular distributor.

LMK if you have more questions.

Two doors, four doors, wagons, and ragtops.
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post #15 of 33 (permalink) Old 02-24-2011, 08:16 PM
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See your other post (although, that one should be merged with this one).
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post #16 of 33 (permalink) Old 02-24-2011, 08:30 PM Thread Starter
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Thank you
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post #17 of 33 (permalink) Old 02-25-2011, 06:25 PM
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LT-1 is a solid engine with the minor exception of that dang Optispark like Jay said.

The heads are good for a street performance car but they won't do the job if you want to step things up to big power like 425 or more if I recall correctly. Right Jay?

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #18 of 33 (permalink) Old 02-25-2011, 08:33 PM
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With any performance engine horse power is the amount of torque your motor makes applied over time (we call this time factor RPM). The higher the RPM the more times a cylinder fires in any given minute and the more twists are imparted to the crank in that minute.

Heads make for volumetric efficiency and the LT-1 has late model fast burn (good squish) heads that are better than anything that preceded it (a few better designed heads have come along after it was released, but none of them will fit on your reverse coolant flow block).

Complimenting the air flow through a head is your cam. Both have to be matched to the other (you do not want a 4,500 to 10,000 RPM high lift short duration roller cam installed in a motor with a set of old 283 Power Pack heads; nor do you want a Bow Tie Vortec head fed by a stock hydraulic two barrel cam). Problem with EFI (and MAP EFI in particular) is that it isn't going to tolerate a radical cam which limits the power you can make (MAF is a better system component for your EFI but not anywhere near as forgiving as a carburetor with annular discharge ventures will be with a radical cam).

The newer EFI sequential timed port injected MAF based LS-x motors make big block power out of a 327 cube motor because they are extremely volumetric efficient (benefiting from everything we know today about wet flow air feed (engineering fluid dynamics) for a gas engine designed on a computer and with parts machined by a robot). They also respond well to a power adder as the computer on board the car is thousands of times faster at tuning the engine under load than any human driver or crew chief could ever be. It takes our human best guess at a tune and modifies fuel flow ignition timing, and varies the valve timing, on the fly in response to EGT, knock sensors and oxygen content in the exhaust compared to the amount of air measured going into the motor. It does this at a frequency of 27 thousand times a second (or faster than any human) to keep the engine running at it's potential peak performance.

Not only do these LS-x engines routinely output over five hundred horsepower on pump gas but they do it while starting smoothly and easily, idling at 500 RPM and are as quite as a Cadillac. There is no drama however (hard starting, rough idling, noisy, ill behaved street manners one would expect from an over 500 hp 327 small block tuned with a screw driver); and some feel that drama is essential to the hobby.

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post #19 of 33 (permalink) Old 02-27-2011, 02:02 PM Thread Starter
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So what can be done to this LT1 engine to increase its power if I wanted to. I am still working out a price with the dealer. This is why I want to know what I am getting into if I buy it.
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post #20 of 33 (permalink) Old 02-27-2011, 02:14 PM Thread Starter
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Here are some pics. What do u think?

Here are some pic of a 1962 with a 1992 Corvette LT1 engine. What do you think about the condition and what it might be worth? Thanks
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post #21 of 33 (permalink) Old 02-27-2011, 02:41 PM
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Very nice car. Looks to be a very expensive car also. I would guess 20,000 +.

http://www.impalas.net/forums/image.php?type=sigpic&userid=521&dateline=14693626  69
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post #22 of 33 (permalink) Old 02-27-2011, 02:56 PM Thread Starter
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They are asking a little over $30000. Does that seem like too much?
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post #23 of 33 (permalink) Old 02-27-2011, 03:11 PM
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Depends how much power you want out of it. A simple cam swap, rockers, valve springs and headers will put you easily in the 350hp range. Professionally ported heads (with the correctly matched cam) will put you over 400. Again, this advice applies to the MAF controlled 93-up LT1. I would suggest checking out the Corvette Forum for help with the unique 92 engine.
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post #24 of 33 (permalink) Old 02-27-2011, 05:01 PM
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That's a TPI motor, not an LT1. It was last used in the Corvette in '91, while it was still used in the Camaro/Firebird for one more year ('92). It also does not look like the Corvette accessory brackets.

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post #25 of 33 (permalink) Old 02-27-2011, 05:26 PM Thread Starter
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That is not a very powerful engine is it. How can you tell what it is. Is it a good fit for a 62?
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