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**Ironangel** · 04-28-2020, 02:52 PM

Matching the gear set to the motor and transmission is key to longevity of all three...The more HP that motor spins up, the lower the gear you can run. In other words, you don't necessarily have to tear the guts out rear ends and transmissions with 3:08 gears when a 3:73 or 4:11 would have lived transferring HP to the tires. I'm running a 4:56 with a built Turbo 350, and yes I have a 400 THM for when the 350 lets go. This new motor will undoubtedly find the weaknesses...But the transmission and rear end have lived through two motors pursuing my 12 second dream...

04-28-2020, 02:52 PM	#10
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: 12 bolt power limit questions Matching the gear set to the motor and transmission is key to longevity of all three...The more HP that motor spins up, the lower the gear you can run. In other words, you don't necessarily have to tear the guts out rear ends and transmissions with 3:08 gears when a 3:73 or 4:11 would have lived transferring HP to the tires. I'm running a 4:56 with a built Turbo 350, and yes I have a 400 THM for when the 350 lets go. This new motor will undoubtedly find the weaknesses...But the transmission and rear end have lived through two motors pursuing my 12 second dream... __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"