Victory Racing

The LS6 also went to a scalloped passage in the Main Bore webbing rather than a circle like the LS1. This is thought to increase windage, also the lifter valley area is different.

FutureZMan

Same size, different idea's.

6spdpewterZ

Please tell me it has forged pistons!!!!

RussStang

4" bore and 4" stroke is a 402. The ls2 is 364 CID. The only difference in displacement between the ls2.ls1 is the ls2 bore measures 4", whereas the ls1 is 3.898". The stroke in both engines is the same 3.622". The out dimensions of both engines are virtually identical.

RussStang

A 502 CID dual rotor would have some seriously huge rotors. What is the 13b in the Rx-7's displacement? Like 80 CID?

ChicagoTransAm

Technically it's 79.81 (1.3L) Most people round off to the formula 61 X Liters= CID but it's technically only 60.7

RussStang

What was I thinking?

Drumhawk

[QUOTE=ChicagoTransAm]I say GM should stop talking liters. I don't live in Europe da*mit. QUOTE]Canada uses liters too just like Europe, probably most LS1 cars were made in Canada too hence the liters, get with it America.

98z28Chevy

I also read in book how to build a performance LS1/LS6 that they have different type of piston made out of different material. But i recently got a 04 z06 motor for my 98z thing is pretty nice. There's also a rumor that LS6 heads with the little triangle shapes next to the plugs are better because of the way they been casted.

ffire

lmao

tmgsix

Maybe they get on your case b/c it's a 346.

lbftbljck

All the Ls (Gen III) motors do not have good internals for power adders. The cranks are cast, the rods are powderd metal and the pistons are forged aluminum. So if ur thinkin about throwin nitrous or boost on them motors, dont use high PSi, cause the engine is gonna break. (speaking from experience, 03 ZO6, 7.63Psi) If you wanna roll w/ high Psi, you need to upgrade the internals to handle the pressure. But goin back to what everyone else was sayin, LS 1-6 are the same blocks, LS6 has a heads/cam and intake uprgade. LS2 is a 6.0 Ltr. The LS7 is gonna be the old C5 Race Block. All aluminum 427 CI, good stuff. Retails for about 15Gs.

RussStang

You have your information wrong. The pistons in the Gen III motors are cast aluminum, not forged. The rods are sintered steel, and the crank is nodular iron. The cranks in these cars are not known for going very easily, so I would think that would be the least of the worries about the bottom end. There have been plenty of guys running over 800hp on the stock crank, and I have never heard of one breaking. They are definetly not the weak point. They hold up to boost well, and unless you plan on spinning the engine over 8000 rpm, they take rpm too. The rods and pistons are decently strong, and can take 8 psi no prob from a blower or turbo, as long as the tune is good. Stock rod bolts tend to go around 7500 rpm, and at even lower rpm on the pre 01 engines, so guys running really wicked cams would do well to consider this. Nitrous is not usually a problem on these engines. People spray 150-200 hp on stock internals on these engines all the time, just don't be stupid about it.

The LS1 and LS6 are not the same block. There are provisions for cylinder venting in the LS6 that the LS1 block does not have. External dimensions are the same for LS1, LS2, and LS6. I don't recall all of the differences between the LS1 and LS2 block casting, but besides the obvious difference in bore size, I believe the LS2's knock sensor is located in a different area. I believe the LS7 has a shorter deck and taller heads, so it is almost identical dimensionally to the other LS series engines, with only this small difference. The LS7 was developed along side the c6r racing engine, so I doubt it will just be the "old" c5r thrown into the new z06.