Whats the difffrence between the LS1 and the LT1? Mechanical diffrences? How they operate?

Please, no replies like "The LS1 is FATSTER" or anything similar.

Thanks!

Flare65

 

I think one diffence is,

The LS1's block is all Aluminum, I believe the LT1 was iron and a little bit heavyer i'm not 100% sure on this though

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-Steve
2001 Z28
Rally Red, Leather, T-Tops, A4 w/Performance Axcel, K&N Filter

 

everything you can possibly think of is different, the only similarity is that they are both 5.7 liters. they both have different firing orders also.

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98 Z28, Onyx Black, A4, t-tops, other than the free mods, a random tech cat back, and a whisper lid, it is stock

[This message has been edited by 1sloLS1 (edited July 15, 2002).]

 

LT1

• 4" bore, 3.48" stroke
• cast iron block, (+ iron heads???)
• "decent" flowing heads and intake
• OK ignition system (Opti-spark) when working properly

LS1

• 3.9" bore, 3.62" stroke
• all aluminum - block and heads
• heads and intake flow better than anything GM has ever built
• new, improved ignition - individual coil packs per cylinder - different firing order than LT1
• "roller rockers", as well as roller lifters (vs stamped rockers on LT1??? I think)

The LS1 is simply an awesome motor, and the aluminum does save a few pounds. The LT1 can be built to compete/beat LS1's, but to buy the fastest "stock" car, the LS1 will win, hands down.

HTH

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2002 Z28 - A4, 2.73's, Blk/blk, leather, T-tops, sport appearance package - just bought on June 26, 2002! - Pics

1981 Z28 - 383, TH350 trans., 3.42 posi - sold August, 2000 - Pics

1973 Camaro - Dad's & my project in the works - to be built: 355 Chevy, 11.5:1 pop-ups, "camel hump" heads (w/2.02 valves), solid cam, 4-speed.....it should be quick! - No Pics yet.

 

Everything, its a completely different design

 

Thanks for the replys guys! Especially Captin Pete. Your reply was very informative. I would have had no idea that each cylinder would have its own coil.......

Flare65

 

Also-

LT1 had 10.5:1 compression and reverse-flow cooling. The water pump is cam driven.

LS1 has 10:1 (I believe) compression and standard flow cooling.

 

You're right about the reverse flow cooling and gear driven water pump in the LT1 - I forgot about that.

While I'm not sure about the compression ratio of the LT1 (10.5:1 sounds right), the LS1 is 10.25:1 (according to this site).

Check out that site - it's in the GM performance parts online catalogue - very descriptive write-up on the LS1 (although I feel like they under-rate the HP a little - who knows?! ).