Con Rod Length

Hi, a general question , more out of interest than anything else,
guys with 526 hemi's (4 1/2 stroke) what length rod are you running ?
just curious as to how much variation there is out there
Wayne

 

rod length

Deck height ? Comp height.? Then you can figure it out. Don

 

4.310" Bore and .100" tall block 4.500" stroke - 175 CC head. I use a 7.126" long rod - standard alcohol pistons = 10.6:1 compression because we run a little nitro.

 

My deck is standard height, my rods are 7.075, Just wondered how much variation there is among similar set ups

 

With a standard deck - Mike Cavalieri mentioned that with a 7.043" rod the compression would be around 11.3:1 and with a 7.076" rod it would be around 11.8:1 (with his standard alcohol piston - Compression height of 1.280"). I was real curious about my actual compression ratio, so I used the foolproof method and put a rubber O-ring in place of the top ring.....then filled the cylinder at BDC (1190 cc) and then again at TDC (111.6 cc) to get the actual static compression ratio of 10.66:1 (7.126" rod with 100" tall deck - 175 cc chamber - .040" head gasket) - hope this helps ya some....

 

Thats a neat trick ! , I'll give that a go.
Thanks for the tip !

 

We run a 4.310 bore, 4.375 stroke (511 cubic inches) with a 7.020 long rod. I don't think our pistons are off the shelf though.

 

rod length

I use 7.100 brooks b2 rods