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Author
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Topic: 3.55's or 4.30's????
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rm302 boss
Moderator Posts: 578
From: Austin Texas
Registered: Dec 2002
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posted 04-05-2003 12:40 AM
   
What do all of you think???
Rene------------------
1970 Boss 302
1990 Taurus SHO
1985 Mustang GT 351W
1995 Land rover Disco
1980 Triumph Spitfire (auto-X car)
http://mustangsandmore.50megs.com/MembersPics/rm302boss.html
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GTRocks
Gearhead Posts: 2289
From: Lusby, MD, USA
Registered: Jun 99
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posted 04-05-2003 08:43 AM
I plan on going 3.73. As always this question's answer is determined by what kind of driving you do. If you do a lot of highway driving the 4.30's will kill you. If you are on the track all the time, 4.30's might not be so bad. What's your plan?
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rm302 boss
Moderator Posts: 578
From: Austin Texas
Registered: Dec 2002
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posted 04-05-2003 12:19 PM
Trailer queen......  In a nut shell; pull up, drive off, kick ass, pull back up, go home ( trophy in hand).... he.. he.. he... Like i said trailer queen ... now that i have one,trailer that is.. But will i run out of motor before i get to the traps??? thats the big question... 
Rene
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Kyle
Gearhead Posts: 235
From: Sumner, WA
Registered: Dec 2001
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posted 04-05-2003 12:52 PM
If you know the RPM you want to be at at the end of the strip, then:MPH= (RPM x Tire Diameter)/(Gear ratio x 336) RPM= (MPH x Gear Ratio x 336)/Tire Diameter Gear Ratio= (RPM x Tire Diameter) / (MPH x 336) Just input your slick diameter, guess at your peak RPM, and you can see what speed your combo will top out at. Hope this helps.
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Moneymaker
Administrator Posts: 19611
From: Lyons, IL, USA
Registered: May 99
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posted 04-05-2003 01:17 PM
4.30's------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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rm302 boss
Moderator Posts: 578
From: Austin Texas
Registered: Dec 2002
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posted 04-05-2003 06:50 PM
quote:
Originally posted by Moneymaker:
4.30's
I should of known... Are you sure maybe some 5.14 would be better??? yeah, i like the 4.30's as well...I think the 3.55 just will not do what i want. And i want some rapid acceleration.. Its the only way a big car has a chance against rice...
Rene
[This message has been edited by rm302 boss (edited 04-06-2003).]
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Stewart
Moderator Posts: 9155
From: Monterey, CA Mustangsandmore Member #437
Registered: Apr 2000
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posted 04-10-2003 12:19 PM
Alex would be The One to answer this, and he has spoken (typed?  ) but I have to ask, isn't the rear gear determined by how your engine is setup, and how the engine will respond to whatever gear is in the rear? I mean, if you want a certain RPM at the finish line, and you have your engine already setup and know how it will respond with whatever gear you decide to run with, wouldn't THAT dictate what numerical gear you'd use? Taking into account tire size too, of course.Stewart
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SS306
Journeyman Posts: 15
From: Ontario, Canada
Registered: Feb 2003
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posted 04-10-2003 03:00 PM
I have 4.30's and highway driving is fine...it won't "kill you"go big or go home!!! ha ha ha Steve ------------------
visit my website at:
http://www.samueldesigns.ca
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Daniel Jones
Gearhead Posts: 488
From: St. Louis, MO
Registered: Aug 99
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posted 04-10-2003 06:32 PM
> What do all of you think about Gears i found a set of 3.55 and a set of
> 4.30 for 50-100 bucks? which ones??Your C4 is 1:1 top gear. With a stock diameter tire, you'd be turning
around 6000 RPM at 105 MPH with a 4.30:1 final gear ratio. Given the
C4's first gear ratio, the 4.30:1 ratio would probably be best for the
drag strip and the autocross. Dan Jones
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