WellOkThen!!!!:congrats:

 

I remember a SJ 302 my Dad built, 2 bolt main, alum rod motor in his Camaro at Dragway 42. 10k rpm...bang when he dumped the clutch...they used a grain shovel to scoop up the pieces. He blamed it on the metallic green paint...he had painted it...bad luck....rest of his engines were Chevy orange. HaHa It shortest day at race track ever. He never spectated...I still have 3/4 of a super rod from it. Only intake and carb survived...

 

Problem here was probably aluminum rods. I know they don't last long in sprint car engines. I believe they get stretched
when throttle blades slam shut at RPM.

 

Does anyone here realize how old this thread is? The OP was even banned (unfortunately) from this site quite a while back.

 

1968-69

3955618

327

4

A,F,Vette

Small Block Chevy casting Engine Block

small block Chevy engine casting bock by minuit10

www.minuit10.net

 

Small Block Chevy Engine Block casting and code identification

Small Block Chevy engine identification. Code identification, Casting Number info.

nastyz28.com

 

According to the internet 4 bolt mains were produced but not used in cars. Stationary engines in combines and trucks

 

Wonder what the 63 Duntov Daytona/Le Man motors ran??

Rumors of the skunk works running 9500 RPM 327's used to give me goose bumps

 

9500 rpm SBCs didn't exist until maybe the late 80s, and that for drag racing only at first. For starters, the heads and valve train wouldn't support that, especially on an endurance engine, even if the short block could hold up.

What did exist before then was aftermarket 4 bolt main caps. That was the first step.

 

Actually SBCS Turning 10K rpm..did exist... and so did 50lb flywheels. My dad's E/G Camaro left at 10,500 rpm.... many did. Lbs per cubic inch racing. 10k rpm tachs were common place, some were higher.

9500 rpm SBCs didn't exist until maybe the late 80s, and that for drag racing only at first. For starters, the heads and valve train wouldn't support that, especially on an endurance engine, even if the short block could hold up.

What did exist before then was aftermarket 4 bolt main caps. That was the first step.

 

Sure were a lot of sprint cars turning some serious RPM's back in the day.

 

I'll stand by what I said. I too ran some lb/cubic inch classes back in the day. Yes maybe some heavy cars left the starting line at 10500 rpm, but until the day of good aluminum heads and shaft rockers they didn't make power there. The aluminum head and rocker arm deal applies to sprint cars and Nascar engines too.

BBC rods don't fit SBC engines.

 

I'll stand by what I said. I too ran some lb/cubic inch classes back in the day. Yes maybe some heavy cars left the starting line at 10500 rpm, but until the day of good aluminum heads and shaft rockers they didn't make power there. The aluminum head and rocker arm deal applies to sprint cars and Nascar engines too.

BBC rods don't fit SBC engines.

You yourself probably played around with increasing ports and raising the roof on intake tracts. There was a pretty good set of 202's that made a great starting point, screw in some studs use aluminum retainers on stiff triple springs and invest in some aftermarket aluminum rods and you could spin a mouse to ridiculous levels. Sure you would never be able to get a set of thoese old iron heads to flow like a set modern 23 degree units but some tuners could do some magic.

 

As I said, spinning an engine with no load to high rpm and making power there are two different animals.