ls1 torque vs lt1 torque
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Joined: Feb 2005
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From: baytown, tx
Originally Posted by the_merv
Last time it put down 325rwhp, 328rwtq after corrections. I have now a fresh balanced Motor, Aluminum Driveshaft, completely different Intake setup, Port-matched Heads, and a couple of other things. I am hoping for over 330rwhp.
That was before all the things listed in that post you quoted.
I was thinking about a 2500, with a Tranny Cooler, and the Transgo Shift Kit put in the Tranny at the same time. I was told that it is good to have it built for that Stall while it is out of the Car..
I am getting MT Drag Radials on it also before I hit the Track.
Originally Posted by slowmofo
All those parts, but no stall?
Even a small 2800 would make a big difference in your car
Even a small 2800 would make a big difference in your car
I am getting MT Drag Radials on it also before I hit the Track.
Originally Posted by the_merv
The LT1 picks up like 90% of it's torque in the 2500rpm area..I don't think the LS1 gets it that low..
Each has their own unique characteristics. The LS1 is the newer technology, so of course it is going to be faster(you would hope so). That is like the difference when the LT1 came out, and it was against the Tuned-Port 350 at the time.
The LT1 though has that nice deep roar that the LS1 doesn't have, and it's a true 350 C.I.D.
The LT1 though has that nice deep roar that the LS1 doesn't have, and it's a true 350 C.I.D.
If we look at the number, the ls1 win without a doubt...
but...
The feeling is not the same.The lt1 as is peak torque sooner than a ls1.
The thing thats make us think that the lt1 got more torque is the feeling that this engine give.This engine feel really ruff compare to an ls1 wich seems to much civilise to my taste.
They lsx base are stronger(hp and tq),faster(stock vs stock) but i dont care.I ve driven tested the 2 bases(lsx/ltx) 2 years ago and call me crazy but even with less power i choose the lt1 and dont worry here the money eas not an issue.
And now with the saving money i do my best to boost this last sbc style real 350 baby and kick some lsx ***.
but...
The feeling is not the same.The lt1 as is peak torque sooner than a ls1.
The thing thats make us think that the lt1 got more torque is the feeling that this engine give.This engine feel really ruff compare to an ls1 wich seems to much civilise to my taste.
They lsx base are stronger(hp and tq),faster(stock vs stock) but i dont care.I ve driven tested the 2 bases(lsx/ltx) 2 years ago and call me crazy but even with less power i choose the lt1 and dont worry here the money eas not an issue.
And now with the saving money i do my best to boost this last sbc style real 350 baby and kick some lsx ***.
Originally Posted by the_merv
This arguement can go on for years..
Wait, it already has. How bout we all just shut up and drive. They both kill Mustangs with no problems..
Wait, it already has. How bout we all just shut up and drive. They both kill Mustangs with no problems..
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Originally Posted by WS Sick
The LS1 makes more torque than an LT1, the LT1 just peaks its torque sooner, so at any given RPM the torque between the two will be missmatched.
The Reason the LT1 peaks so soon on torque is because of head flow plain and simple, heck you put a set of ported heads on a stock LT1 and it would perform like a stock LS1.
When you look at the LS1 head cc numbers it is deceiving because the runners IN the head are shorter than on an LT1, so the 170 CC LT1 compared to the 200CC LS1 is rediculous, it would be like the LT1s stock 170 CCs compared to a 210 CC LT1 head.
The Reason the LT1 peaks so soon on torque is because of head flow plain and simple, heck you put a set of ported heads on a stock LT1 and it would perform like a stock LS1.
When you look at the LS1 head cc numbers it is deceiving because the runners IN the head are shorter than on an LT1, so the 170 CC LT1 compared to the 200CC LS1 is rediculous, it would be like the LT1s stock 170 CCs compared to a 210 CC LT1 head.
No matter how you cut it, even though LT1s feel tough off the line, you better pack a lunch because unless you take them very VERY badly off the line, those lS1s are coming to getcha! I felt the pain all too many times.
Yea, they do have that catch up, and it will suprise you. I pulled my friends LS6 Vette(with LT's, Drag Radials, and a Programmer) 3 carlengths off the line, and he shifted and was up my ***. But he stayed there all the way till 125mph, couldn't pull that little LT1..
Well mine has changed a bit since I last posted. I managed to build a Wiring Harness to drop in a LSX Engine. I sold the LT1 that is in it, and I have started building my new project. I didn't go with a LS1, I got something in plan that will toast someone with a LS1..
Under this is a 6.6l 402ci LS2 Ironblock Stroker, it will have the L92 Heads on it, they have been milled .025 for 66cc Chambers to get 10.7:1 Compression, L76 Intake with LS2 Fuel Injection System, the Cam is a TSP MS3 specs: 237/242, .603/.609, 112LSA, and a Yank SS3600 Stall.
It will be nasty
and still look good cause it's a LT1 body style.
Instead of running close to the LS1, why not beat the ever living **** out of them.. 
Under this is a 6.6l 402ci LS2 Ironblock Stroker, it will have the L92 Heads on it, they have been milled .025 for 66cc Chambers to get 10.7:1 Compression, L76 Intake with LS2 Fuel Injection System, the Cam is a TSP MS3 specs: 237/242, .603/.609, 112LSA, and a Yank SS3600 Stall.
It will be nasty
and still look good cause it's a LT1 body style.Instead of running close to the LS1, why not beat the ever living **** out of them..
It's not hard to do, my Hotcam setup was killin them all the time. The LT1 Aftermarket is what kills the performance capabilities of that Engine, stuff is crazy expensive.
I just figured that if I can get in a LS2, then I'll be able to get in what comes out after the LS7..that and I spent nothing on this compared to what I would have spent on a LT1 to get the same power I am about to have.
I just figured that if I can get in a LS2, then I'll be able to get in what comes out after the LS7..that and I spent nothing on this compared to what I would have spent on a LT1 to get the same power I am about to have.
I have an L98 out of the 90 or 91 corvette, rated at 250 hp, 350 tq, that is in my 91 z28. It feels fast as hell just driving around normal, but at higher RPMs it just doesn't cut it. Not that it's slow or anything it just doesn't have what an Ls1 has.
I've driven an Auto LT1 and it felt like a combination of an L98 and LS1. Felt like an L98 at lower rpms, and ...a slower version of an ls1 at higher rpms.
I've driven an Auto LT1 and it felt like a combination of an L98 and LS1. Felt like an L98 at lower rpms, and ...a slower version of an ls1 at higher rpms.
Originally Posted by procamaroz28
hmmm... true, well ur car is just sick anyways cant imagine what will happen w/ that new motor
This new Engine is what I decided to go all out with, so might as well do it with somethin nasty..It's going to be one hell of a sleeper..
The main thing is the design with the LSX Heads. The SBC/LTX lowends are more than capable of some high RPM's, the Heads are where it is limiting it. Comparing them, it's 23* LTX/SBC Heads vs. 18* LSX Heads. Then you add in bigger Valves, Ports, Chambers, you get some good power. I plan on running my 402 close to 7000 RPM's with the Cam I want, it's just how it's designed. It's coming off the line at about 3400RPM with the Stall, and it will pull stupid strong up to 6500RPM easily.
These are the L92 Heads I am using.. they flow better than 95% of the Aftermarket LSX Heads. These are the best on the market right now, and go with the L76 or LS7 Intake only.
Valves: 2.16" INT/ 1.59" EXH, 66cc Chamber
Flow: 325/210CFM's, 4.000 Bore @ .600 lift.
Last edited by the_merv; Apr 26, 2007 at 09:40 PM.
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Originally Posted by speed_demon24
stock vs stock there is no point anywhere where an LT1 has more torque than an LS1, the LS1 has more torque at any RPM. Is that so hard to comprehend?
This is an old post I found,but this genius was wrong.The LT1 does produce more torque than the LS1 around 2400 rpms.However the LS1 is the superior engine.Produces more peak TQ and HP than the LT1 combined with insane top end power.