I'm wondering what the LS1 guys have on us LT1 guys. They have an aluminum block with iron sleeves that have less cubic inches than our LT1's. What makes them faster? That is just out of curiosity because why is it that they make more hp than ours from the factory? Is it the heads, do the coil packs really make that much of a difference besides reliability?

Im wondering because I picked up the car in my sig over the summer and my cousin picked up a 2001 ws-6. We haven't been able to race yet because my opti is currently broken but i would assume that he would be able to beat me. In theory since the LT1's have a larged volume bottom end, wouldn't the LT1's be able to produce more horse power numbers than LS1's with a set of heads and a cam?

reason im asking is because once i get my car running and race (hopefully soon) i figure he is going to beat me. However, we are both doing some sort of head/cam package by the summer in which i think we are both going the ported package road. I know everything has to do with how everything goes together and attention to detail in terms of getting the car running to full potential with the package, but does he have any advantage over me in that area besides a lighter block?

 

Its mostly the better flowing heads.

If all things are equal, the LT1 can not match the power of the LS1.

 

That statement makes ZERO sense

 

Let me clarify.
Take an LT1 and an LS1, throw all the bolt ons on each one. The LS1 still wins.

Take both motors, throw a similar spec cam in each, the LS1 still wins.

Take both motors, throw a 100 shot of juice on each, the LS1 wins.

Both motors with equal mods, the LS1 wins.
The LT1 has to be more heavily modded to gain the advantage over the LS1.

 

Insert equally flowing heads/intake to the equation and things change.

 

The LS1 starts out with what, an 80 or 90 lb. weight advantage, bigger brakes,and the better-flowing heads.

346 C.I. is not a big difference from 350 C.I.-

No opti- they work okay, but are a pain to work on- Only GM would put a distributor underneath a water pump.....

They are both good motors- the LS1 just has more development and refinement- just like the LT1 was a step ahead of the TBI engines, the LS1 is the next generation-

So, the LT1 has been out of production for 10 years, now- in a few more years it will be getting harder to find parts for them- most aftermarket manufacturers want to sell volume-

 

So you are saying once you do this on a stock LT1 and a stock LS1 they will make the near exact same power and torque.

 

the bottom end means nothing......if the heads flow the same, same style intake say a super vic. the a LS will do the same as LT and the cam has to be the same.

Its just an air pump...


This is not tech....reporting to injuneer!

 

Yup, I will have to agree with this statment the way it is presented.

 

your problem is availability of heads for the LT motors.....alot better now than it was years ago...but compared to whats out now for LS stuff its no comparison at all.

Its just technology moving forward.......Maybe LTX will make a comeback with these new darts that are out now......

 

another thread that needs to be shut down before the inevitable happens. Do some research and you will see the benefits of newer technology in the ls1. biggest reasons are that the intake is MUCH better on the ls1 which doesn't hurt headflow as much as the lt1. the ls1 also has a different valve angle and taller/bigger ports etc. airflow is where the ls1 really shines. the better intake manifold and valve angle allows the aftermarket to design better heads for the ls1. The lt11 "breadbox" manifold was a crappy design used to clear the lt1 low cowl more for form over function. as a result it restricts airflow significantly. If some company could design a nice composite manifold similar to the ls1 fast design I believe we would see a sizeable gain which would put the power outputs of these motors much closer.

 

That's just not very realistic since you now have L92 heads that will flow well over 300cfm out of the box. Take a stock LSx head to any reputable porter and it'll blow any "D" port head out of the water into the next millenium.
This doesn't need to be closed unless there are going to be oversensitive, blind, ignorant cry babies who cannot grasp the reality that the LSx engine is far superior to any previous SBC generation.

 

The only real advantage the LT1 has is the 5 bots/cylinder, but 99% of the people will never even come close to lifting a head on an ls1 anyway. And there are the warhawk and lsx blocks out there that address that issue.

 

Ok well my question was answered, the LS1 has the heads and intake going for it as well as some more development. Now it is obvious to me that after i do my head/cam package and so does he, it is a matter of who has a better set up when time comes this summer. I have been doing plenty of research and am most likely going to go with a stage 2 setup from either of the 2 most popular vendors which i am not even going to go into because ive seen how those previous threads have turned out.

 

l92's flow way more than 300 cfms out of the box. Look into ls1tech.com if your interested in what their capable of. Their about 10 years of technology ahead of a lt1. The reason why ls1 are as fast as they are is the heads. They flow what most companies stage 2 or well ported heads lt1's do, so that is the reason for the track time differences. A stock lt1 car makes 260rwhp and 300rwtq roughly, a stock ls1 car is 300/300rw. And the weight is about a 125lbs difference (block, driveshaft, plastic fuel tank)
If you look at heads and cam using 300cfms as a benchmark many LS heads are getting where as few LT's are. The newer LS heads (l92's,ls7's even ls2's) are between 300-400cfms. Where as you would need to convert a standard sbc head to reach those flow numbers. But the plus side is that the lt1 stuff is a little cheaper. So after you both sink 5k into the motor you ll be catching up to him.
But you are always going to be trying to keep up unless you do something drastic. Like a forged 383 with L.E. afr 220's and a 200shot.
good luck though