PG gear ratio?

Darrin Christen · 12-14-2009, 09:46 AM

I ran a 355" sbc in a 2860# chevy II with a 1.76 glide 5.67 rear gear. Car went a best of 1.33 60' @ 9.86 and consistent 9.90's @132mph at 8200 rpm in cool weather. I put a 2.03 low gear and 5.43 rear gear. 60' times dropped to 1.30-1.29 and ran basically the same E.T. and mph at 7900 rpm. You will have more rpm drop at gear change with the lower gear ratio. Car has a 8" 5800 convertor and a 15" x 33" 105" roll out. I leave with the trans brake at 4200 rpm. The car was more consistent with the 2.03 low gear due to being able to transfer the weight better, and a whole lot more fun to drive! The 2.03 broke after about 350 runs. I put the good old reliable 1.76 back in for now! Hope this helps.

12-14-2009, 09:46 AM	#10
Darrin Christen Member Join Date: Mar 2007 Location: Des Allemands, LA Posts: 365 Likes: 8 Liked 1 Time in 1 Post	Re: PG gear ratio? I ran a 355" sbc in a 2860# chevy II with a 1.76 glide 5.67 rear gear. Car went a best of 1.33 60' @ 9.86 and consistent 9.90's @132mph at 8200 rpm in cool weather. I put a 2.03 low gear and 5.43 rear gear. 60' times dropped to 1.30-1.29 and ran basically the same E.T. and mph at 7900 rpm. You will have more rpm drop at gear change with the lower gear ratio. Car has a 8" 5800 convertor and a 15" x 33" 105" roll out. I leave with the trans brake at 4200 rpm. The car was more consistent with the 2.03 low gear due to being able to transfer the weight better, and a whole lot more fun to drive! The 2.03 broke after about 350 runs. I put the good old reliable 1.76 back in for now! Hope this helps. __________________ 4878 SS/GA 66CHEVY II