LS1 vs LT1

Greetings members at CamaroZ28.com. Granted this is my first post here on the boards, however I am not a newb to the automotive industry. There has been quite the discussion on another forum regarding the LS1 vs LT1 debate. Now I’m sure this has been discussed many a times on CamaroZ28.com on different occasions, however I was unable to Search for a concrete thread comparing these two motors. Can I get some general feedback and your own personal experiences of these two motors? How do they compare to one another, the power potential of the two from a bolt-on phase to a complete rebuild, and most importantly from a reliability standpoint. I’ve read and had many experiences against the two motors on the street and have great respect for them, so I figure I’d ask the experts here on camaroZ28.com. Thank you in advance.

do a search!! You will find 100 Lt1 vs. ls1 threds!!!
Sebastian

Stock to Stock LS1>LT1

Why? Better heads, 200cfm vs 160cfm
more lift, 1.7 rocker LS1 vs 1.5 rocker LT1 (LS1 is also a roller trunion(sp?)
Better Exhaust for the LS1 (manifold wise)
Better Ignition

Bolt on potential, see above.

Reliability,

Equal, if anything I would give a slight nod to the LT1 just for the fact that I have seen a few with well over 200k some even with over 400k. Give it some time and the LS1's will get up there in milage also.


Power after rebuild, LS1=LT1, it just depends how much $$$ you want to spend.


Personaly, I would Love to see someone take some LT1 heads and get them to flow very close to what LS1's flow stock. Bump up the lift on the LT1 cam to match the lift at the valve on the LS1. Put an MSD on the LT1 and some shorty headers on it and put some LS6 manifolds on the LS1. Then strap them to a dyno. If I had the money I would do it.

The LS1 is just simply a better starting point. Performance wise.

Ls1 vs. LT1.....here we go again ;)

Ls1 vs. LT1.....here we go again ;)

Yeah, can't we make it "big block vs. small block?" "Boxers vs. briefs?"
"Yankees vs. Red Sox?" "Abbott and Costello vs. The Marx Brothers?" "Domestic beer vs. Imported beer?" Mmmmmm, beer!
*BURP!*

The LS1 is a completely redesigned enginer:
Coil-per-cylinder ignition system, unique firing order, non-standard SBC intake/exhaust valve arrangement, 15-degree aluminum heads, 346ci aluminum block with 6-bolt mains, composite intake manifold, etc, etc....the only similarity is that they are both GM V8s :lol:

The LS1 is basically your run-of-the-mill detuned race motor with an anemic factory-cam. ;)

Mike

....the only similarity is that they are both GM V8s



I think they use the same cam bearings.

The tire valve stem caps on the LS1 are .010 where the caps on the LT-1 are .020. This gives the LS1 the extra horsepower and torque. But if you mod the LT-1 windshield wiper blades to the C-6 Corvette windshield wiper blades, this about evens things up between the LS1 and LT-1. But the huge gain comes when you replace the LT-1 inside sticker with the LS1 inside sticker, this is good for .0003 in the quarter mile. :D

ZMAN

Welcome to Cz28.com ... and think you for posting LT-1 vs. LS-1 post no. 245335654 on this site.

What it really comes down to is that after you smoke the factory pistons its cheaper to rebuild the old school LT1.

They both have pros and cons, do research and see what you are comfortable with.

if you have alot of money laying around I'd say LS1, great heads, better ignition, less weight. Plus the body is more appeling to most.


Now please dont start a Vortech Vs Procharger thread next.

Whoops thought I was in the FI forum!

How about a classic nitrous vs supercharger? Or even better, which cold air induction? Or yet, which air foil is better? :D

ZMAN

There is no doubt the LS-1 is more advanced in terms of V-8 technology, but there are some things the LT-1 just does better. Prime example, planning on HUGE boost, then the LT-1 is a better suited block due to more head bolts which prevents problems with lifting the heads. Lt-1 castings have supported 1,000+rwhp without any problems and flow well into the 300's when fully reworked. Yeah, stock to stock, the LS-1 is the clear victor, opinions aside. An LS-1 can be built to withstand tremendous abuse as can the LT-1. The LT-1 is cheaper to build. IT goes on and on. In the end, its prefference that sways you to one or another. I have an LT-1 and I have nothing but good things to say about it. Keep doing searches on the topic and I am sure you will find what you need to make up your mind. :cool:

I think they use the same cam bearings.
nope. THe LS1 cam is 55mm. That's basically a race cam with small duration :)

They do use the same hydraulic roller lifters. :)

twin turbo or stage 3 supercharger ?

This thread has been up almost a full day and the admins havn't moved it yet? :eek:

All out build ls1=lt1
Bolt ons ls1>lt1
For couple main reasons
ls1 heaads flow better
ls1 heads are 15 degrees vs lt1 heads are 23 degrees
Ls1 aluminum block is at least 70lbs lighter but not as strong
If you have to build up a lt1 you use factory 2 bolt main block and splay it
If you want to build up a Ls1 all out, you would most likely have to ditch the stock aluminum block and go with 6ltr iron block or C5R block which is $$$.
Pretty much and even game when it comes to going all out.
But if you want to do bolt ons ls1 top end design is just better that is why they are faster to start with and react to bolt ons better.

Thank you for the replies from the useful members on this board.

Interesting and LT-1 Vs. LS-1 in the adv. Tech and hasn't been relocated?

Moderator musta broke his computer.

I think they use the same cam bearings.
They share the same bore spacing, :D

nope. THe LS1 cam is 55mm. That's basically a race cam with small duration :)

They do use the same hydraulic roller lifters. :)

Rod bearings is what you were thinking of.

For a all out NA motor LT1 vs. LS1 even with the bad ass LS1 heads out there I still like converted SBC heads over the LS1 stuff anyday.

Bret

Rod bearings is what you were thinking of.

For a all out NA motor LT1 vs. LS1 even with the bad ass LS1 heads out there I still like converted SBC heads over the LS1 stuff anyday.

Bret
Come on Bret. :rolleyes:
Standard SBC cam journal is 1.868"
LS1 is 55mm.

I hope you were talking to the other guy...

He said he thought that the cam bearings were the same... I corrected him and said that the rod bearings were the same size (2.100")

You would think I would know the difference between a R (Ford, LS1, 55mm) cam journal and a S (SBC) one since I do all these cams a month/year....

Bret

i have a 97 ss 30th i like my engine wish it was a lt4 lolo .t plus i like the look of my white orange stripe all though the 35th with racing flag stripes is nice lolo. and so is the 2002 427. a 69 camaro would be the easiest to work on. but then id go lt1 i can tell you i race the hell out of my car i have 94500 miles its strong i dont like ls1 intake and all those ciols. i thing lt1 motor looks nicer lolol. the front headlights are more airodynamic on the ls1 id take my lt1 over the ls1 but out of the box the ls1 cars are a litlle more performance stock once you get into the world of mods you could have a pinto and beat both so what do you like more?

:shock:

He said he thought that the cam bearings were the same... I corrected him and said that the rod bearings were the same size (2.100")

You would think I would know the difference between a R (Ford, LS1, 55mm) cam journal and a S (SBC) one since I do all these cams a month/year....

Bret
Like I said, I hoped you were talking to the other guy and accidentally quoted me :D

He said he thought that the cam bearings were the same... I corrected him and said that the rod bearings were the same size (2.100")

Bret



I think you meant to correct ME. :p

i have a 97 ss 30th i like my engine wish it was a lt4 lolo .t plus i like the look of my white orange stripe all though the 35th with racing flag stripes is nice lolo. and so is the 2002 427. a 69 camaro would be the easiest to work on. but then id go lt1 i can tell you i race the hell out of my car i have 94500 miles its strong i dont like ls1 intake and all those ciols. i thing lt1 motor looks nicer lolol. the front headlights are more airodynamic on the ls1 id take my lt1 over the ls1 but out of the box the ls1 cars are a litlle more performance stock once you get into the world of mods you could have a pinto and beat both so what do you like more?


:think: :think: :think: :think: :think: :irk: :no: :yuck: :shock: :barf:

Somehow I missed this little gem. Amazing how little real tech info can be contained in 2 pages of posts.

As usual.... UnstableBob's post wins "best of show" :D :D