GM Unveils new NASCAR "R07" V8

[327]

Yeah thats right, Remember when all you nonbelievers were crying that nascar shared nothing with production vehicles or parts


Introducing the RO7 GM race engine / extreme version of a LS series

New GM Racing Engine to Power Chevy in Cup in 2007: It's all change for Team Chevy in the NASCAR Nextel Cup Series in 2007. In addition to the scheduled introduction of the Impala SS Car of Tomorrow in March, GM Racing is introducing a new small-block V-8 racing engine that was specifically designed for NASCAR competition. The new powerplant - designated R07 - has been approved by NASCAR for competition in 2007. Chevrolet teams are expected to begin the transition from the current SB2 (Small-Block/2nd Generation) engine to the new R07 in March. Work on a successor to the SB2 began shortly after the SB2's introduction in NASCAR competition in 1998. The R07 retains the pushrod/two-valve layout that has been the mainstay of American motorsports since the introduction of the first-generation GM small-block V-8 in 1955. It is a highly advanced racing engine that meets NASCAR's specifications. Per NASCAR regulations, the R07 displaces a maximum of 358 cubic inches. In contrast to the SB2's "mirror port" cylinder heads, the R07's cylinder heads resemble production LS-series small-block cylinder heads with alternating intake and exhaust valves. While production small-block V-8 engines employ electronic fuel injection, the R07 port layout is optimized for the single four-barrel carburetor mandated by NASCAR. The R07's key technical advances over the SB2 include 4.500-inch cylinder bore centers (vs. 4.400 inches in SB2), a raised camshaft that improves valvetrain dynamics, a new six-bolt head bolt pattern that reduces cylinder bore distortion, and a targeted cooling system that minimizes temperatures at critical locations. A cast camshaft tunnel, integral piston squirter galleries, and overhead oil feed galleries reduce engine assembly time. Relocating the fuel pump to the inboard side of the car and eliminating external oil and coolant lines enhance safety. Although the R07 is a purpose-built racing engine, it has strong ties to production powerplants. "The concepts and processes that are used to improve the performance of our racing engines is shared with the production engine designers to improve the efficiency of our production engines," said Tom Stephens, group vice president of GM Powertrain.(GM Racing PR)(2-15-2007)

similar to what runs in the SS impala street car

and the LS364 GMPP carburated LS engine
http://www.gmhorsepower.com/LS364.html

credit www.jayski.com

[GM_Fanatic]

Ohhh, very nice! Now GM can actually tout a product to sell on Monday after a win on Sunday...genius.

[camaro_freak]

at least the engine has some connection

too bad the car bodies don't even come close...

a flimsy sheetmetal body over a full metal tube frame isn't going to trickle down to in the Impala you drive off the lot on Monday.

[327]

QUOTE

a flimsy sheetmetal body over a full metal tube frame isn't going to trickle down to in the Impala you drive off the lot on Monday.[/quote]

especially since it never really has. Other than factory provided sheetmetal parts of today.

[ogg vorbis]

i really like what gm is doing with their engines. the R07 is already in catalogues. i don't believe it shares parts with ls motors...but i can see a few features migrating to production engines...raised cam in a tunnel, oil squirters.

although, gm is bringing out the lsx block next month! http://www.gmperformanceparts.com/En...6454&engCat=ls
up to 4.25" bore, 4.5" stroke (510 cu-in!!!), and 2500 hp. with the big block being phased out of production trucks, i can see a 496 small block with L92 heads in a silverado or escalade ss

[fenderbender]

How much power is this thing pushing out, and what is the power of the ford dodge and now toyota racing engines. I really know nothing about nascar.

[327]

Originally Posted by ogg vorbis

i really like what gm is doing with their engines. the R07 is already in catalogues. i don't believe it shares parts with ls motors...but i can see a few features migrating to production engines...raised cam in a tunnel, oil squirters.

although, gm is bringing out the lsx block next month! http://www.gmperformanceparts.com/En...6454&engCat=ls
up to 4.25" bore, 4.5" stroke (510 cu-in!!!), and 2500 hp. with the big block being phased out of production trucks, i can see a 496 small block with L92 heads in a silverado or escalade ss

the article says it shares the same style LS heads. LS production heads can alternate valves too. Same with the 6 bolt mains.
The higher cam and oil squirters come from the LS7 and corvette race car.

HP is unkown yet, But it doesnt matter. Nascar will make a concession to the spoilers so the cars end up all similar performance

[HEVguy]

I understand why NASCAR regulates the engine tech to certain technologies, but come on!! 2 valves per cylinder!? Carburated!?!? Let's move into the 2000's for cryin out loud!!!

Note: this is a NASCAR complaint, GM just has to comply with these rules of course so I am not blaiming them directly

[HummerTech]

Thats not the R07......

Originally Posted by ogg vorbis

i really like what gm is doing with their engines. the R07 is already in catalogues. i don't believe it shares parts with ls motors...but i can see a few features migrating to production engines...raised cam in a tunnel, oil squirters.

although, gm is bringing out the lsx block next month! http://www.gmperformanceparts.com/En...6454&engCat=ls
up to 4.25" bore, 4.5" stroke (510 cu-in!!!), and 2500 hp. with the big block being phased out of production trucks, i can see a 496 small block with L92 heads in a silverado or escalade ss

[goblue1999]

Originally Posted by HEVguy

I understand why NASCAR regulates the engine tech to certain technologies, but come on!! 2 valves per cylinder!? Carburated!?!? Let's move into the 2000's for cryin out loud!!!

Note: this is a NASCAR complaint, GM just has to comply with these rules of course so I am not blaiming them directly

I think they mandate old-tech for two reasons
1) cheaper for teams to play
2) easier for tech inspections

there's plenty of power there for good ol' boy racin'

[goblue1999]

Originally Posted by 327

the article says it shares the same style LS heads. LS production heads can alternate valves too. Same with the 6 bolt mains.
The higher cam and oil squirters come from the LS7 and corvette race car.

HP is unkown yet, But it doesnt matter. Nascar will make a concession to the spoilers so the cars end up all similar performance

how right you are. there's not much benefit to improving the motor, any advantage will be handicapped away by the Nascar Gods

[jwrebholz]

ooooh...that LS364/440 is a nifty little gem of a motor isn't it?

I want one. I haven't got anything to put it in but I want one.

[stevecmh]

Originally Posted by GM_Fanatic

Ohhh, very nice! Now GM can actually tout a product to sell on Monday after a win on Sunday...genius.

def.. its about time

[commodorecoops]

Originally Posted by HEVguy

I understand why NASCAR regulates the engine tech to certain technologies, but come on!! 2 valves per cylinder!? Carburated!?!? Let's move into the 2000's for cryin out loud!!!

Note: this is a NASCAR complaint, GM just has to comply with these rules of course so I am not blaiming them directly

Carburetted engines make more power than injected ones. Because the fuel has more time to mix with the air. Sure, they aren't as efficient, but when top end power is all you require, carburettors are the go. And if DOHC is so much better, then why has Chevrolet/GM's OHV small block been the world's racing engine of choice for over 50 years?

And as for moving into the 21st century, did a pushrod engine not power the McPherson strut suspended VE Commodore to victory in the Wheels COTY contest against the Toyota Aurion, BMW 3 Series Coupe, Volkswagen Passat and an Audi or two? Doesn't matter what sort of technology you have, it's how you use it that matters.

[unkillsam]

Originally Posted by fenderbender

How much power is this thing pushing out, and what is the power of the ford dodge and now toyota racing engines. I really know nothing about nascar.

I think the average race engine now makes around 850 horsepower, untestricted of course. On the big tracks they only make about 450 to 500. Remeber, these motors rev to 9000 rpms so the horsepower figures are a little distorted vs what you would find on a normal production carb smallblock.