Shinkaze

Saw this posted rom Andy Seipos who attended the Corvette Birthday bash. The Following Slides are from his Photo Album

LS2 vs LS1

Photo Credit:Andy Seipos

LS2 vs LS6

Photo Credit:Andy Seipos

A rather exhausting Powerpoint is shown here:
http://64.81.147.40//modules/gallery...lbum50&page=15
Which goes into great detail on all the componets that are new and revised on the LS2 from the LS1/LS6.

maddboost

iTrader: (11)

Damn the LS2 makes more TQ than Hp thats definitly gotta be fun on the street.

Shinkaze

Going by dyno graph alone I would take the LS2 over the LS6 any day of the week All I can say is "Wow!" strong flat, and much smoother than the LS6. Heck 3000-3500 RPM, the LS2 is making close to 100 HP more than the LS6. Hope they put that motor into the GTO and CTS-V!

DrkPhx

iTrader: (15)

Wow is right. That is a huge increase in torque. The LS2 should be a monster.

destroyerSS

iTrader: (2)

the LS2 is making close to 100 HP more than the LS6. Where did you see this??? Ok it looks good but now lets be realistic this was at a GM event do you realy think there going to give an average LS2 dyno or the best one?? Let's see what they do in real life before everyone gets all giddy. Granted i do think they will be fast but we need to see real world results first BTW what do ya think GM would of advertised the HP to be if this motor was going into a camaro also?

DrkPhx

iTrader: (15)

So... 10:9 compression, new 3-pc intake that flows 30% more, revised PCV system to minimize oil consumption, 6.0L aluminum block, revised heads for better port efficiency (LS6 heads I take it), external knock sensors for more accurate readings (thank you), no PCM; it's ECM/ TCM which is a standalone unit, and a 90mm TB.

Damn nice.

However, they went down to a .525 lift cam (what spec?), put the "flow straightner" back on the MAF, kept the LS6 valve springs (which ones MY01 or MY02?) mounted the cam sensor in the front cover instead of rear.

My main interest is the block capability with LS1 components. It's sounds like the block is a LS6 hybrid, but is 6.0L. The external knock sensors, and cam sensor position change will present a challenge. So to me the million dollar question is; Is it worth to swap the block with existing LS1/LS6 components? I guess we will have to see.

Shinkaze

right between 3,000 RPM and 3,500 RPM. FWIW though the LS6 makes LESS HP than the LS1 at those RPMs as well. The LS6 makes 5 more HP at peak than the LS2, but everywhere else the LS2 makes more power and from 3,000- 3500 it makes a ton more power.Huh? the LS2 basically *is* an LS6 with .3 more liters, and countless other improvments, I don't see why the LS6 *would* make more area under the curve than the LS6?

hehehe
This sort of reminds me of the LS1 vs the LT4. Peak to Peak they looked like similar motors, but in real life the LS1 had more power under the curve and proved itself to be the better powerplant. It hink we'll see the same from the LS2.

Shinkaze

Looks to me like they did the classic trick of more displacment, less cam for similar peak and more power under the curve. But if I read those power points right it gets same mileage and emissions, so as far as I'm concerned I think that's cool.
Hmmm, sounds to me like the rotating assembly will work, but the LS1/6 Cam blanks won't. Also got to wonder how that intake is configured and why they went to a three piece design? Thought I was done with three piece designs when I got rid of my L98!!!!

-Adam

destroyerSS

iTrader: (2)

:
Originally Posted by destroyerSS
the LS2 is making close to 100 HP more than the LS6. Where did you see this???

right between 3,000 RPM and 3,500 RPM. FWIW though the LS6 makes LESS HP than the LS1 at those RPMs as well. The LS6 makes 5 more HP at peak than the LS2, but everywhere else the LS2 makes more power and from 3,000- 3500 it makes a ton more power. Do you know how to read a dyno chart??? Solid lines are torque, split lines are HP. Torque #'s are read from the left, HP #'s from the right. As i see it between 3000-3500 RPM there is about 30 more FT LB's of torque and about 10 more HP!!! Anyhow i'm not saying that this will be a bad motor at all, just say'in lets see what it does in the real world not some vette b-day bash

jay's99transam

is that first graph at an angle or is the cross over on the ls1 at 4800 rpms?? They should be arond 5200 hundred shouldn't they?? It seemed funny to me because the ls2 crossed over at 5252 around there. Am I the only one seeing this??

Shinkaze

Woops!


I must have been smoke'n the crack pipe a little hard yesterday, I was looking at the Torque graph, thinking it was the HP graph and then laying the lines over the HP side of the chart.



-Adam

destroyerSS

iTrader: (2)

I hope you didn't think i was tryin to BTW i had to look over that damn graph a bunch of times myself Anyway that motor will probably turn out quite nice. It's just to bad we will probably not be able to steal much from it Also when i finally get my new A/S heads and my LSX all installed, if i does not dyno good i'll just send the dyno graph to ya and you can add a 100 or so additional HP on for me

horist

damn... at first I thought those numbers were crazy... then realized that they're engine dynos... not rear wheel....

I started getting really pissed off at my 6.3 Liter motor but it's all good now

JS

iTrader: (4)

Its still KILLING the LS1/LS6 based motor.
I gotta have one of these in my JUDGE

SapphireHawk

The torque curve on the LS2 is not flat at all!! The reason it has more Torque then horse power is that it drops off hard after 5000 RPMs. (The torque curve looks like a boob)

I am guessing they need some better flowing heads and the engine would really open up then. I think it will be fairly easy to get 500RWHP out of the LS2s.

jmX

They have the same heads, its not head flow thats making it peak out earlier than the LS6, its the cam profile.

The lines dont cross because the scale of the lines are totally different. If torque and horsepower are both on the exact same scale, then the lines will always cross at the 5252 mark.

z98

They both drop down at the same point because the same things are restricting both engines (not enough cam mostly).

I'll take the mid range torque anyday and add a real cam on my own. I hope this block isn't impossible to swap into an f-body, because with a 4" crank we could have some pretty cheap 400+ ci engines.

WECIV

Why is it that the LS2 has a linear power curve and the LS1 and LS6 have these camel humps in their power curve??? How did the LS2 pull that off???

70 TA

In the latest GM Hi-Tech on page 10 they have info showing the c6 top speed 186 and 1/4 in 12.6 must be LS2 times

On the same page 2005.5 Z06 427 LS7 3 valve heads clutchless manual.

They said they couldn't confirm details nor the 575 HP rating.

I wonder how my SS will do with a modded version of that in it?!

BAD ASS TA WS6

iTrader: (5)

I find it funny that the LS6 graph shows just about a perfect peak of 405hp.

I think that graph is a crock (no offense at all) I'm sure they LS2 will have power exactly like that. But the graph is probably a setup as it seems. Maybe I'm just being an *** though