A question of torq and rear end ratio.

Mo65 · 12-21-2000, 05:50 AM

Can any body tell me how the concept of rear ends work. In my 65 I hace a 2:80 rear-end ratio. I am still working on my car and have not driven it yet. I have a 302 and a c-4 transmission from a Ford Futura.I do not know what I will expect as far as rpms, torq, etc. I am not building this car for racing purposes. I want low rpms in freeway speeds. However, I preffer low-end torq. 0-60 performance. In the car I have petronix ignition, and petronix 40,000 volt coil. The engine is stock and has a new holley 2 barrel carburator with a K&N fitler and a 289 high perfomance type air filter.I have a pair of tri-Y headers and panning to install a 2 1/4 inch double exhaust with a balance tube and Dyno Max super turbo mufflers. I did these mild modifications to make it run more effecient and aquire a little bit more low end torq and not for top end speed racing.
Will the 2:80 rear end give me low Rpm at freeway and better low end torq? I have not purchased tires yet, and some people say that I need taller tires to aquire low end torq and drop the rpms. Other say that I need tires that are about 24-25 inches tall to get a better low end torq.
Can anyboby that has the knowlege, explain to me what the 2:80 will give me, and with the combination I have, what height tires do i need to aquire low-eng torque and keep the freeway rpms to a minimum.
One last thing, is the dyno max super turbo the best bet for a quit performance muffler. I was planing to instal a Flowmaster 3 chamber, but everyones said it is noiser and it is an overkill because the engine is under 300 hps, and it would not make a diffrence.
I appreciate anyones input and advise, thanks.

12-21-2000, 05:50 AM	#1
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	A question of torq and rear end ratio. Can any body tell me how the concept of rear ends work. In my 65 I hace a 2:80 rear-end ratio. I am still working on my car and have not driven it yet. I have a 302 and a c-4 transmission from a Ford Futura.I do not know what I will expect as far as rpms, torq, etc. I am not building this car for racing purposes. I want low rpms in freeway speeds. However, I preffer low-end torq. 0-60 performance. In the car I have petronix ignition, and petronix 40,000 volt coil. The engine is stock and has a new holley 2 barrel carburator with a K&N fitler and a 289 high perfomance type air filter.I have a pair of tri-Y headers and panning to install a 2 1/4 inch double exhaust with a balance tube and Dyno Max super turbo mufflers. I did these mild modifications to make it run more effecient and aquire a little bit more low end torq and not for top end speed racing. Will the 2:80 rear end give me low Rpm at freeway and better low end torq? I have not purchased tires yet, and some people say that I need taller tires to aquire low end torq and drop the rpms. Other say that I need tires that are about 24-25 inches tall to get a better low end torq. Can anyboby that has the knowlege, explain to me what the 2:80 will give me, and with the combination I have, what height tires do i need to aquire low-eng torque and keep the freeway rpms to a minimum. One last thing, is the dyno max super turbo the best bet for a quit performance muffler. I was planing to instal a Flowmaster 3 chamber, but everyones said it is noiser and it is an overkill because the engine is under 300 hps, and it would not make a diffrence. I appreciate anyones input and advise, thanks.