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Chevy V-8 Small and Big Block, Bore and Stroke Data
There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.
Chevy Small Block Bore and Stroke
| C.I.D. |
Bore |
Stroke |
Rod |
Description |
|---|
| 262 |
3.671 |
3.10 |
5.7 |
Gen. I |
| 265 |
3.750 |
3.00 |
5.7 |
Gen. I,1955-57 |
| 265 |
3.750 |
3.00 |
5.94 |
Gen. II,1994-96,4.3L L99 |
| 267 |
3.500 |
3.48 |
5.7 |
Gen. I |
| 283 |
3.875 |
3.00 |
5.7 |
Gen. I |
| 293 |
3.779 |
3.27 |
6.278 |
Gen. III,1999+,4.8L Vortec LR4 |
| 302 |
4.000 |
3.00 |
5.7 |
Gen. I |
| 305 |
3.736 |
3.48 |
5.7 |
Gen. I |
| 307 |
3.875 |
3.25 |
5.7 |
Gen. I |
| 325 |
3.779 |
3.622 |
6.098 |
Gen. III,1999+,LM7,LS4 FWD 5.3L Vortec |
| 327 |
4.000 |
3.25 |
5.7 |
Gen. I |
| 345 |
3.893 |
3.622 |
6.098 |
Gen. III,1997+,LS1 |
| 350 |
4.000 |
3.48 |
5.7 |
Gen. I |
| 350 |
4.000 |
3.48 |
5.7 |
Gen. I,1996-01,Vortec |
| 350 |
3.900 |
3.66 |
5.74 |
1989-95,LT5,ZR1 DOHC |
| 364 |
4.000 |
3.622 |
6.098 |
Gen. III,1999+,LS2,6.0L Vortec LQ4 |
| 376 |
4.065 |
3.622 |
|
Gen. IV,2007+,L92,Escalade,Yukon |
| 383 |
4.000 |
3.80 |
5.7 |
Gen. I Truck Crate,2000,HT 383 |
| 400 |
4.125 |
3.75 |
5.565 |
Gen. I |
| 427 |
4.125 |
4.00 |
|
Gen. IV,2006,LS7,Titanium Rods |
Chevy, Common Non-Factory, Small Blocks Bore and Stroke
| C.I.D. |
Bore |
Stroke |
Rod |
Description |
|---|
| 377 |
4.155 |
3.48 |
5.7,6.0 |
400 Block,350 Crank,Spacer Main Bearings |
| 383 |
4.030 |
3.75 |
5.565,5.7,6.0 |
350 Block,400 Crank,Crank Main Bearing Journals cut to 350 size |
