Gear ratio's
05-07-2008, 11:43 AM
#1
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Gear ratio's
what would be the best rear gear set for a 1/4 car with a fully built 3 speed C4 i want the fastest 1/4 mile time but i fear if i go to high in the ratio ill lose all top end speed for the big end of the track, any advice?
05-07-2008, 12:26 PM
#2
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RE: Gear ratio's
in my buddy's car he has 4.10's... he runs 9.6's going through the traps at 140+mph @ almost 8200rpms.... (yeah its a built motor obviously)....A c4's gr'ing is nice though...atleast in mine it is... 1st is kinda short-right out the hole- 2nd nice mid range- 3rd i'm wide open... and i'm about to go to 4.30's.... i run 1/8th mile though.....
05-07-2008, 01:13 PM
#3
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RE: Gear ratio's
the gears in there now are 3:73 and the car is crazy fast, but if i go to a 4:10 im scared ill get to high in the rpms at the end of the track i serisouly doubt i can turn 8k saftly since i barly push it to 6500 it falls out about there
05-07-2008, 01:22 PM
#4
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RE: Gear ratio's
nah you wont hit 8500 rpms.... the way he does it is a built motor... Dart Man O war aluminum block, AFR heads, 850 carb, lots n20.. and a solid roller cam... and other tweaks and tunes in there as well....
what kinda suspension, tires, and weight reduction do you have now?
Have you ever ran it in a 1/4?
If so what rpm were you at at the finish?
what kinda suspension, tires, and weight reduction do you have now?
Have you ever ran it in a 1/4?
If so what rpm were you at at the finish?
05-07-2008, 01:31 PM
#7
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Join Date: Oct 2007
Location: Birmingham, Al
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RE: Gear ratio's
ORIGINAL: 1990NOS!
nah you wont hit 8500 rpms.... the way he does it is a built motor... Dart Man O war aluminum block, AFR heads, 850 carb, lots n20.. and a solid roller cam... and other tweaks and tunes in there as well....
what kinda suspension, tires, and weight reduction do you have now?
Have you ever ran it in a 1/4?
If so what rpm were you at at the finish?
nah you wont hit 8500 rpms.... the way he does it is a built motor... Dart Man O war aluminum block, AFR heads, 850 carb, lots n20.. and a solid roller cam... and other tweaks and tunes in there as well....
what kinda suspension, tires, and weight reduction do you have now?
Have you ever ran it in a 1/4?
If so what rpm were you at at the finish?
05-07-2008, 01:52 PM
#8
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Join Date: Aug 2006
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Posts: 218
RE: Gear ratio's
sYckm- When you say fully built 306... what is the compression ratio????
In a 306, with a nice set of heads, and like 10:0:1 comp.... with a nice bump stick... some n20 will help a lot with getting you to the finish a little faster... of course any P'adder will...
just a thought.... but if you are going n/a... some gear, less weight, suspension, good tires, a nice tune, and good driving will do the trick.... you want to be the shft to come on or about to come one at the finish line.... What size stall converter do you have???
In a 306, with a nice set of heads, and like 10:0:1 comp.... with a nice bump stick... some n20 will help a lot with getting you to the finish a little faster... of course any P'adder will...
just a thought.... but if you are going n/a... some gear, less weight, suspension, good tires, a nice tune, and good driving will do the trick.... you want to be the shft to come on or about to come one at the finish line.... What size stall converter do you have???
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