LT1 vs. LS1???

[1BAD305]

now:

[DVS LT1]

Wow, thats pretty damn good man. Here I'm ready for you to say that 305 is running like 3.73 gears or something. Fuck, thats really good (is it stick or auto?). My 4L60E 4-speed is turning 2.93's and everyone says "you'll be in the 12's for sure with a 3.73 setup", but I don't ever want to give up my top end.

I hear you about the stickies, last summer I was running BFG G-Force KD's which were pretty good(half worn out though), just put on new Firestone Firehawk SZ50EP's about a month ago and ran a similar best ET this past May two-four weekend - but both times were by just simply flooring it off the green. Every time I tried to launch it at around 1500 RPM(stock converter) the tires would bog (BFG's were the same way).

Yah slicks are definitely the way to go - every other guy this past outing said they never run without them. Slicks and a nice 3500 stall torque converter are whats next on my agenda.

But again, I am impressed! :coolguy:

[1BAD305]

its a 5 speed, this car has the advantage of the 5spd which soaks up less hp out of the little 305, plus its a bit lighter then the 700R4, and the gearing of the T5 keeps the car in its power band better. its also hardtop which is a bit lighter then T-Top cars aswell. i got it weighed at 3350 with me in it. so its not extremely heavy but it does have a lot of torque for sure! im not to sure of the setup on that LT1 with the 2.73s, but with some mid 3 gearing like 3.42s would work out great, u definitly wont loose top end. my car accelerates up to 130mph quicker and harder then it ever did with the 3.08s that are supposed to be "highway gears" it also is 2 tenthes faster then before too. yeah a stall converter definitly would be a plus on the launch.

specs for last season:

Ported Plenum
Centerforce Dual Friction
Poly Tranny Mount
Poly Torque Arm Mount
Modified Air Box
K&N Filters
Dynomax Headers
Dynomax Cat Back Exhaust
Hollowed Cat
Throttle Body Coolant Bypass
IAT Sensor Relocated
Emissions Delete
AC Delete

this year:

LT1 Cam - 3MPH gain, up to 100.2mph now
Descreened MAF Sensor
Ported Plenum
Centerforce Dual Friction
Poly Tranny Mount
Poly Torque Arm Mount
3.27 9 Bolt Rear - .2 tenth reduction this spring
Modified Air Box
K&N Filters
Dynomax Headers
Dynomax Cat Back Exhaust
Cat Delete
Throttle Body Coolant Bypass
IAT Sensor Relocated
Emissions Delete
HVAC Delete
12* Base Timing
Toyo Proxes FZ4s

my cardomain page:http://www.cardomain.com/member_page...=251389&page=1

[dapriceiswrongb]

HEY DVS LT1 who were you racing in the second time slip. That person got a .505 reaction time. What kind of car was it?.....

[DVS LT1]

These were full blown drag cars there man - everything from old Cutlas', Charger's, Duster's that all ran consistant 10's to 12's. (I think the car I ran against was a beige Duster with supplier stickers all over it, gutted interior, roll bars etc... OR, I think it might have been an early 1980's Mustang with a similar setup). Half of the cars were old drag beaters (This one rusted piece of shit 1950's Truck ran a 10 second ET).

The other half of the field were actual competition drag cars that came into the park inside their mobile garage trailers! Fastest car I saw that day was (what looked like) a silver LS1 Camaro - I knew this was a custom built-up tubular drag car when I saw him being pushed/towed to and from the line by an ATV. He ran a day low(from what I saw) mid 7 second quarter mile at over 160 MPH. NUTS! He was runninga 600+ cid big block, top fuel, etc.........

Bye the way my R/T's were better the times I actually launched the car, but the ET's were higher.

[dzdevil]

I don't have alot of knowledge about the LS1,but I do own a 2001 Z-71 with a 5.3 LS1 iron block.I just towed home a wrecked 2000 camaro with a 5.7 LS1 aluminum block.It's going in the 67.

[Blue02R6]

Is everyone aware that there are two LS1s?
The much more common SBC based 5.7 and the Pontiac 400 R/A IV. As far as which is better...

Pontiac LS1> The others

[-cy-]

Originally posted by Blue02R6
Is everyone aware that there are two LS1s?
The much more common SBC based 5.7 and the Pontiac 400 R/A IV. As far as which is better...

Pontiac LS1> The others

Technically, as far as 4th gen's go, there is only the LS1 and LS6, both of which are made by GM, and are 346cu aluminum block/head engines.

[Blue02R6]

Originally posted by -cy-


Technically, as far as 4th gen's go, there is only the LS1 and LS6, both of which are made by GM, and are 346cu aluminum block/head engines.

The LS1 I was refering to came in 1970 Trans Ams. I know about the new LS1, but LS6 do not come in F bodys. Well, some of the blocks are. However none came with LS6 heads, ect. I was just letting people know about the old engine, after all Pontiac had the best back then. Just think of all the SD's and R/A's.

I never said they came in fourth gen's .

[-cy-]

Originally posted by Blue02R6


The LS1 I was refering to came in 1970 Trans Ams. I know about the new LS1, but LS6 do not come in F bodys. Well, some of the blocks are. However none came with LS6 heads, ect. I was just letting people know about the old engine, after all Pontiac had the best back then. Just think of all the SD's and R/A's.

I never said they came in fourth gen's .

Well, i think its obvious that the discussion is about the LT1 and LS1 as reffering to 4th gen f-bodies.

Also, you are right there were no LS6's in f-bodies stock. In late '01 and '02 some of the LS1 f-bodies got the LS6 block as well as LS6 intake manifold. The only difference was better crancase ventilation and some other smaller things.

Anyways, this is a discussion about LT1's and LS1's.

Which is better? I think it depends on your wallet and time you are willing to spend moding it. If you wanna just drop it in, then i'd say LS1. An Lt1 with some ported heads and healthier cam its there with LS1's.

If you have the cash, i'd deffinitely say to go with an LS1, no reason to not to.

[220swift]

Both are great engines, LT1 has an iron block w/ aluminum heads, reverse cooled to get 10.2-10.8:1 CR. peak torque are ~4000 RPM, optispark ignition. LS1 has an all aluminum block/heads, its powerband is higher in the rpm band. Ignition is individual coil packs for each cylinder sitting on the valve covers.

Having a 92 vette w/ a LT1 and 6 spd ZF trans has been great. The engine runs hot though (200-215) and early LT1s leak oil from their rear mains (not much though). Only complaint is that there's not that much LT1 performance aftermaket parts. Car consistently ran mid to high 13s in the quarter.

I bought a 99 Z28 to replace the vette since one I raced pulled on me. The LT1 is a great engine, the LS1 is simply awesome. It runs cooler since its all aluminum. Doesn't need reverse cooling for 10+:1 CR and doesn't leak a drop. There are much more aftermaket performance parts for it. It runs a little rougher than the LT1 though. The LS1 camaro runs mid 13s in the quarter, working on getting into the 12s

You can't do wrong going either way. If you're going to do some serious engine work -stroker motor- you might want to go with an LT1, otherwise get the LS1.

Just my 2 cents for what its worth...

[DVS LT1]

Originally Posted by 220swift

...the LS1 is simply awesome...It runs a little rougher than the LT1 though.

I've seen a modified LS1 C5 with a big .590 lift cam and this engine purred like a Cadillac. I'd have to say the LS1 runs much smoother than the LT1. A lot this has to do with ignition, namely the individual coil packs and reverse firing order of the LS1.

EDIT: sorry about jumping back into this old thread. No more.

[FormulaLT1]

Originally Posted by 220swift

Only complaint is that there's not that much LT1 performance aftermaket parts....

Now that is just not the case today, You tell me what type heads you want , exhaust , ignition , injectors or programmer's and I will send you like 20 different versions of each one, but the rest of your post seemed right on and DVS I have heard that some early model LS1's do tend to run a little rough too but with that ignition which is awesomeI don't see why , someone needs to make a kit where you can replace opti with the coil per plug system

[DarkblueTA]

LT1 was in the 93-97 Fbodies and 92-96 Vettes. It is an iron block with aluminum heads. Has a reverse direction(flow...coolent goes to the heads and then the block vs. normally the block then the heads) cooling system with the first non-distributor ignition system(al la Opti-spark). Power ratings were 275(93 Fbodies) and 285(94-97Fbods)....300 for the Vettes. LT1s are 350 Cubic Inches.

LS1 is found in the 97+ Vettes and the 98-02 Fbodies. It has coil on plug ignition system. Aluminum block and heads. Normal cooling system. Power ratings were 350 for the Vette and 305/315 for the 98-00 Fbodies/WS6&SS and then 310/320 for the 01-02 Fbodies/WS6&SS. LS1s are 346 Cubic inches.

Basically, the ONLY thing that you can swap from engine to engine is the hydrolic lifters. Everything else between the 2 engines are different. Is one better then the other? Depends on your taste. LT1s have more low end grunt(peak power wise) but LS1s have a better top end. Both have nice torque curves, 2500 or so for peak torque on the LT1 car and 4100 for the LS1 cars.

I like both and it depends on how much you want to spend when it comes down to it. Both can be made to be VERY fast. Either way, you come out with a good car with a good engine.

[z06transam]

Ls1 Definately Kicks Ass Ove Rthe Ls1. So Uch More Power And Overall Stronger Engine.