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NOT an LT1 Vs LS1 Thread.

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Old Aug 29, 2006 | 11:34 PM
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Default NOT an LT1 Vs LS1 Thread.

This thread is not intended to ask witch is better. Its pretty obvious to me at least that the LS1s are the superior motors in stock form. So my question is..what affords the LS1s the "edge" over an LT1. I mean, I realize they are totaly differnt motors. But is there one major thing that makes the big difference or are there a few? My best guess is that the LS1 heads and intake flow alot better and therefore allow for more agressive tuning to begin with? Just want to hear some thoughts on it.
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Old Aug 29, 2006 | 11:48 PM
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Im going to say the heads.
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Old Aug 29, 2006 | 11:54 PM
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heads and intake as far as performance goes, other then that it is a newer engine so it has better engineering that makes it a better engine overall, in most all aspects.
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Old Aug 30, 2006 | 12:06 AM
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I would only say its better in stock form past 75 mph. Runing a stock LT1 in a stock LS1 in the 1/8 is just plain stupid the LS1 will loose if the LT1 has at least a 3.23 gear and runing good (at least from what I have seen).

I have basic stuff, and 3.42's, tune, cat back, a LS1 car even 6 speed car with mild mods has never beaten me to 85mph.

That was on street tires mind you.

Most people shake off the LT1, When I was at the track last I was pulling horrid 2.2 60's, all motor, street tires, I ran a free moded 6 speed 02 SS and raped him till about 90. With stickies I would have been door to door with him going threw the traps.

Ran a blown C5 Z06 that put almost two cars on me a little past the 60 mark and then held there and did not pull after that.

Last edited by JUICED96Z; Aug 30, 2006 at 12:12 AM.
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Old Aug 30, 2006 | 01:33 AM
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Right...My car with sig mods, vs my brothers 99 WS6 w/ Borla, K&N and 3.73s....I burn up 1st, and once I hook my nose stays at his gas tank door until we are pulling through 3rd, he starts to make me look like a smoker at a track meet in 3rd gear BUT I am guessing thats exactly where the heads/cam will come into play 4 me..right?
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Old Aug 30, 2006 | 02:18 AM
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15 degree valve angle, non siamesed ports, better flowing intake design
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Old Aug 30, 2006 | 07:22 AM
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Your LT1 has 210 cfm intake flow. The LS1 flows 255 cfm intake. That is a HUGE difference in the heads right there. HUGE!
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Old Aug 30, 2006 | 07:23 AM
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Why would you beat an ls1 0-60? The LS1 has more low-end tq. Look at any dyno graph stock/stock and you will notice this. at least, with the dynos I have seen. The LS1 just has more top end and thus feels stronger up top than down low.
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Old Aug 30, 2006 | 08:11 AM
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aluminum engine, aluminum driveshaft, coil packs, no optispark
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Old Aug 30, 2006 | 12:49 PM
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Originally Posted by Stanger88
Why would you beat an ls1 0-60? The LS1 has more low-end tq. Look at any dyno graph stock/stock and you will notice this. at least, with the dynos I have seen. The LS1 just has more top end and thus feels stronger up top than down low.
Are you asking me why? If so, my answer is..I havent LOL. But I come real close with my brother.
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Old Aug 30, 2006 | 01:16 PM
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Yes an LS1 with a 3.73 would probably take care of an LT1, I was saying stock for stock.
I think my car is a little bit of a freak and from the research I have done I have learned that the LT1 STOCK FOR STOCK is faster then a LS1 in the 1/8 but again every car is different.

I read a thing in GMHTP that said a good running LT1 has more bottom end then an LS1 or at least in comes in sooner.
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Old Aug 30, 2006 | 01:26 PM
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heads are FAR superrior cam only ls1 are capable of 420+ hp...lt1 mayby 365...also you can hit a stock ls1 with 200-250 shot and run 10's and still get 25mpg comfortable
reason lt1 are so good is the cam is so small that they make great torque...the ls1 is way more powerful when it gets up to 30mph 4000rpm+ or more where it makes it power..
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Old Aug 30, 2006 | 02:56 PM
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Heads make or break the engine
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Old Aug 30, 2006 | 05:00 PM
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Originally Posted by JUICED96Z
Yes an LS1 with a 3.73 would probably take care of an LT1, I was saying stock for stock.
I think my car is a little bit of a freak and from the research I have done I have learned that the LT1 STOCK FOR STOCK is faster then a LS1 in the 1/8 but again every car is different.

I read a thing in GMHTP that said a good running LT1 has more bottom end then an LS1 or at least in comes in sooner.

I feel sorry for you if you actually believe that. If both cars get equal traction the LS1 will be faster everywhere.
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Old Aug 30, 2006 | 06:31 PM
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Weight of the motor and some really decent heads out of the box.. The lsx is a kick *** design.. But you can close the gap w/ a good set of heads and a decent cam.. Avg H/C LS1 puts down about 420-450rwhp.. Where as a LTx will go 380-425rwhp depending on the choice of heads.... Start going outside w/ aftermarket casting's for both and it get's really interesting.. Then it's a $$$ game.. LS1 still has the weight adv. and def. has the aftermarket support as well...
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Old Aug 30, 2006 | 08:44 PM
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Originally Posted by Stanger88
The LS1 has more low-end tq.
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Old Aug 30, 2006 | 08:47 PM
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Originally Posted by JUICED96Z
I would only say its better in stock form past 75 mph. Runing a stock LT1 in a stock LS1 in the 1/8 is just plain stupid the LS1 will loose if the LT1 has at least a 3.23 gear and runing good (at least from what I have seen).
If you're talking about both cars stock or modded equally then you're wrong, the ls1 will take it.
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Old Aug 30, 2006 | 08:48 PM
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Originally Posted by burnzilla
It does.

LS1 has more HP and torque everywhere, for the most part.

The LS1 makes peak torque higher than the LT1, hence the sotp feel that the lt1 has more low end torque.

This is of course with both cars stock.
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Old Aug 30, 2006 | 08:54 PM
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Originally Posted by infinitebird
It does.

LS1 has more HP and torque everywhere, for the most part.

The LS1 makes peak torque higher than the LT1, hence the sotp feel that the lt1 has more low end torque.

This is of course with both cars stock.
True. I think people confuse the peak numbers and what rpm they come at.
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Old Aug 30, 2006 | 09:07 PM
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Originally Posted by infinitebird
It does.

LS1 has more HP and torque everywhere, for the most part.

The LS1 makes peak torque higher than the LT1, hence the sotp feel that the lt1 has more low end torque.

This is of course with both cars stock.
The LS1 does make more TQ, but at more RPMS. Around another 1200 to be somewhat accurate.
LT1's push Tq more effortlessly, at lower RPMS.

Yes the LS1 peaks more Tq, but it needs to be revved.
The LT1 has 325 Tq ( give or take) @ 2400 ( around there ).

So thats why it feels snappy. And its one of the things I love about my LT1. Effortless power.
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