camaro LS3?

SSRich · 03-08-2007, 03:02 AM

Has anybody heard anything about the new LS3, what is suppose to be the difference the LS2 and the LS3?. I have heard on a website that it is going to have 3 valves. I have heard the hp rating as 403,420,425,450. Does anybody have any speculation

LS7engineer · 03-08-2007, 08:12 AM

Yes and cant really say yet haha sorry for the tease

Casull · 03-08-2007, 09:10 AM

Quote:

Originally Posted by LS7engineer

Yes and cant really say yet haha sorry for the tease

That's just mean!

You guys better be cooking up something good!

Casull · 03-08-2007, 11:01 AM

I was doing some digging around on the Corvette forums to see if there was anything posted on there. Turns out they are just about as clueless as we are. However, I did find out that the new Corvette will be unveiled on Saturday, April 28th at the National Corvette Museum.

So, in about 50 days we will have a lot more information about the LS3 specifications.

I can't wait to see the HP rating (obviously) but also the fuel economy since it is supposed to have DoD... how awesome would a 450HP engine with 30 MPG be...

jg95z28 · 03-08-2007, 01:34 PM

Do a search because I know the LS3 has been discussed here in the past.

Based upon what I remember is its basically an LS2 with new 3-valve heads, AFM. etc. Yes, its a motor I expect to see in the production Camaro. (At least one of the V8s.)

Casull · 03-08-2007, 01:55 PM

Quote:

Originally Posted by jg95z28

Do a search because I know the LS3 has been discussed here in the past.

Based upon what I remember is its basically an LS2 with new 3-valve heads, AFM. etc. Yes, its a motor I expect to see in the production Camaro. (At least one of the V8s.)

i am aware it has been discussed... quite a bit actually. I was referring more to the exact specifications of the LS3. Everything at this point seems to be pure speculation, at least from what I have read.

STOCK1SC · 03-08-2007, 02:08 PM

Quote:

Originally Posted by jg95z28

Do a search because I know the LS3 has been discussed here in the past.

Based upon what I remember is its basically an LS2 with new 3-valve heads, AFM. etc. Yes, its a motor I expect to see in the production Camaro. (At least one of the V8s.)

It's a little bit more than that to be fair, more displacement,6.2 liters, and variable valve timing. The motor is already in the Cadillac Escalade, not sure about the 3 valves though but it has VVT.

2000GTP · 03-08-2007, 04:57 PM

Quote:

Originally Posted by STOCK1SC

It's a little bit more than that to be fair, more displacement,6.2 liters, and variable valve timing. The motor is already in the Cadillac Escalade, not sure about the 3 valves though but it has VVT.

This is what I have heard as well floating around the Corvette forums. Noone is really sure of exact specificiations yet, but it will be all its hyped to be I'm sure.

LandonElf · 03-08-2007, 05:07 PM

They also used a prototype LS3 in the show "Muscle Car" on Spike's Power Block. They put it in a sleeper granny car called "Old Blue Hair". I didn't get to catch the final test drive, but when they cranked it up it sounded like a beast.

If a prototype LS3 is already being extensively modified succesfully, its looking like a VERY good thing for us modders.

jg95z28 · 03-08-2007, 05:15 PM

Quote:

Originally Posted by STOCK1SC

It's a little bit more than that to be fair, more displacement,6.2 liters, and variable valve timing. The motor is already in the Cadillac Escalade, not sure about the 3 valves though but it has VVT.

I wasn't aware that the 6.2L displacement had been confirmed.

STOCK1SC · 03-09-2007, 10:11 AM

Quote:

Originally Posted by jg95z28

I wasn't aware that the 6.2L displacement had been confirmed.

This motor is already in the Cadillac Escalade, it has been for 6-7 months now. It also has the 6 speed auto.

95firehawk · 03-09-2007, 11:01 AM

Quote:

Originally Posted by LandonElf

They also used a prototype LS3 in the show "Muscle Car" on Spike's Power Block. They put it in a sleeper granny car called "Old Blue Hair". I didn't get to catch the final test drive, but when they cranked it up it sounded like a beast.

If a prototype LS3 is already being extensively modified succesfully, its looking like a VERY good thing for us modders.

I've seen all the episodes that they had on "Old Blue Hair" and I don't remember seeing an LS3. I did see a mildly modded LS2 go in but not the LS3.

95firehawk · 03-09-2007, 11:19 AM

I had to look it up because I wasn't 100% certain what engine they used. They put in an LS364 crate motor out of the GMPP catalog. This motor looks like its nothing more than the LS2 with a carbed intake. Its rated at 440 hp so I don't know if its got anything else done to it or not but I agree with Landon that it sounded really good when they fired it up.

Chocolate Apocalypse · 03-09-2007, 11:41 AM

Firehawk is right, Blue Hair uses an LS2. I believe its stock internally as well, no mods besides the carb. I was kinda disappointed when they made motor mounts that raised the motor so they wouldnt have to mod the oil pan. C'mon!

Casull · 03-09-2007, 09:47 PM

For those of you who do not yet think this horse is dead....

I found this over on the Corvette forums. A guy over there was trying to make a educated prediction as to what he thought the power rating on the new LS3 would be. I thought his argument had good logic and made sense....

"There is a lot of talk about the new LS3 but GM hasn't announced any horsepower ratings. I figured I'd take a stab at predicting what it might be.

Looking at the hp ratings of the recent LS motors, we have...

LS1 -- 346 ci -- 350 hp -- 1.01 hp/ci

LS6-I -- 346 ci -- 385 hp -- 1.11 hp/ci
LS2 -- 364 ci -- 400 hp -- 1.10 hp/ci

LS6-II -- 346 ci -- 405 hp -- 1.17 hp/ci
LS7 -- 427 ci -- 505 hp -- 1.18 hp/ci

LS3 -- 378 ci -- ???

The advances in technology are evident when you see that GM was able to take their 346 ci engine from 1.01 hp/ci to 1.11 hp/ci. This level became the norm for a "base" engine as the LS2 came out at 1.10 hp/ci.

Conversely, we have the higher performance offerings of the LS6-II and the LS7 that reached 1.17 and 1.18 hp/ci, respectively.

So, what makes sense for the LS3?

I my opinion, if you consider the general advances in technology plus the few extra ci, then the hp/ci will be higher than 1.10 and 1.11 above. Also, if you consider that it is still a base engine, you would expect it to be less than the 1.17 and 1.18 hp/ci.

An interpolation of the above results in 1.14 hp/ci which means 430 hp for the 378 ci LS3.

430 hp is my prediction"