What rear gears should I run?
Moderator: John_Heard
What rear gears should I run?
Wondering what rear gears we should run in my car. Swapped over to a 434 from a 350 this winter. Have 4.88's in it now, and don't know whether to go to 4.33 or 4.56. Its going to be naturally aspirated, 1/4 mile racing. It felt last year like it was running out of gear. Just wondering what everyone's opinion is on this.
4.10's, light car shouldnt need that much gear.
72 Malibu-Nov. '08-1.329-3.995-6.280@106.94-9.988@131.62
best 60ft to date- 1.319
http://www.dragtimes.com/1972-Chevrolet ... -5251.html
best 60ft to date- 1.319
http://www.dragtimes.com/1972-Chevrolet ... -5251.html
Can you give us a little more info about your combo?
Where does it make power (RPM)?
What trans are you running?
What size slick?
What do you think the MPH will be in the 1/4 mile?
What converter are you running (stall)?
Where does it make power (RPM)?
What trans are you running?
What size slick?
What do you think the MPH will be in the 1/4 mile?
What converter are you running (stall)?
"THE THROTTLE IS THE DEVIL" By Mr. Willis
"ALL I SEEN WAS HOOD!" By Mr. Heard
MAKO RS-1979
Sponsored By:
Total Removal Contracting-Tim Rogers
"ALL I SEEN WAS HOOD!" By Mr. Heard
MAKO RS-1979
Sponsored By:
Total Removal Contracting-Tim Rogers
vegaracer wrote:I don't know exactly where its maximum power is. It should be around 7000 rpm. We're running a powerglide with a 5500 rpm stall speed. The slicks are right around 32" tall (maybe a little shorter). Hope to run right around 155 mph, but 150 to 155 would be ideal.
Here is a link to the TCI racing Calc.
http://www.tciauto.com/Products/TechInf ... lators.asp
I plugged in your numbers with a 7% Converter slip and it came out to a 4.01 gear, so Bob was close , a 3.90 to a 4.10 gear would probably be ideal. Also being how your car probably aint that heavy, it shouldnt need a real stiff gear to get the car moving.
Oh, and what first gear do you have in the Powerglide?
Hope this helps??
Adam
"THE THROTTLE IS THE DEVIL" By Mr. Willis
"ALL I SEEN WAS HOOD!" By Mr. Heard
MAKO RS-1979
Sponsored By:
Total Removal Contracting-Tim Rogers
"ALL I SEEN WAS HOOD!" By Mr. Heard
MAKO RS-1979
Sponsored By:
Total Removal Contracting-Tim Rogers
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