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7.100" Stroker Length Rods (2.200" BBC Rod Journal)
Pontiac V8 7.100" Stroker Length Rods (2.200" BBC Rod Journal)
The Long Rod — 7.100" Stroker Length Rods (2.200" BBC Rod Journal) for Pontiac V8s
7.100" stroker rods are the longest rod Butler lists for a Pontiac V8. They run the 2.200" big block Chevy rod journal and exist for one reason: on the biggest stroke combinations, a longer rod improves the rod-to-stroke relationship and eases side loading on the cylinder wall.
Butler stocks the Eagle forged 4340 H-beam at 7.100" on the 2.200" BBC journal. Because the rod length and the compression height have to add up to the deck, this is a rod that has to be chosen alongside the piston, not after it.
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1. What a 7.100 inch rod is for
| Rod to stroke ratio | On the longest stroke Pontiac combinations, a longer rod keeps the rod-to-stroke ratio in better shape than the shorter stroker rods do. |
| Cylinder wall loading | A longer rod reduces the angle the rod makes at mid-stroke, which means less side load pushing the piston into the bore. |
| Where it lives | Deck height has to allow for it. A 7.100" rod and the piston that goes with it are a package decision on a tall deck or aftermarket block combination, not a bolt-in swap for a 6.800" rod. |
2. What Butler stocks
| Eagle 4340 forged H-beam, 7.100" | On the 2.200" big block Chevy rod journal. Eagle's 4340 H-beam line is forged from two-piece 4340 steel with 7/16" ARP bolts, alignment sleeves for cap location and weight matching to plus or minus one gram, and Eagle recommends the family for competition use up to 1500 horsepower with L19 bolts. |
| Journal size matters | This is a 2.200" BBC journal rod. It will not fit a crank ground to the 2.250" Pontiac journal. |
| Bolt grade | ARP 8740 is rated at 190,000 psi and ARP 2000 at 220,000 psi. Pick based on what the engine will actually see. |
3. Order it with the piston
The piston compression height has to shrink to make room for a longer rod, so the two parts have to be specified together. Butler builds custom Ross and DSS pistons to any compression height, which is what makes a 7.100" rod combination practical in the first place. Call with the block, the deck height, the stroke and the rod journal size before you buy either part, and check the manufacturer's torque and stretch procedure at assembly rather than reusing a figure from a different rod.
Not sure what your Pontiac needs?
Email our tech team at tech@butlerperformance.com. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.