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Author
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Topic: Tires and gears ? Kinda long
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 03-02-2003 06:11 PM
   
I've been thinking about this and I can't find information on it.Which way is better for a street/strip car.
4.11 gears and tall tire or 3.55 gears and a shorter tire.
I keep reading that if the gears are to big go with a taller tire to help keep the rpms down on the highway.But doesn't that also change the over all ratio?
Take my car with stock heads.I dont want to go over 5000rpm at the end of 1/4 mile.
But if I go to 3.80 gears I'd have to go to taller tires too.But at that point would I be any better off then running my 3.40 gears and short tires?,would I run any quicker one way or the other. This question is just about my car.I'm just trying to understand the relationship between tire size and gears. ------------------
SCOOP
oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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Dubz
Gearhead Posts: 1048
From: Manitoba Canada
Registered: Oct 2002
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posted 03-02-2003 06:15 PM
my opinionshorter tires = less rotational weight
less rotational weight = faster times
faster times = a happy scoop :P
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james306
Journeyman Posts: 82
From: falmouth,me,usa
Registered: Feb 2003
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posted 03-02-2003 07:13 PM
the short tire tall gear will give the same final ratio of a tall tire short gear as long as they were matched properely. i would go with short tire tall gear for two reasons. #1 everything DUBZ said. #2 you can run short slicks at the track for the extra ratio it will give you then you can run taller street tires for MPG and street ability. just be sure to calibrate your speedometer for the taller street tires.
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Fstln69
Gearhead Posts: 355
From: Westmont,il
Registered: Jan 2003
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posted 03-02-2003 07:21 PM
We run a 275 60-15 with a 4.10 on the street and a 26" slick on the track seems to work good,ain't like were going to florida in the car....  ------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page
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Butch Jennings
Gearhead Posts: 611
From: No. California
Registered: Apr 2000
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posted 03-02-2003 07:33 PM
I've always looked at it the opposite of you guys. A taller tire has a bigger footprint than a shorter tire. A taller tire also has less rolling resistance than a shorter tire. A taller tire will slow down the bearing speeds (a big deal guys) compared to a shorter tire. A shorter gear (3.80) has a better mechanical "leverage" than a taller gear (3.40). I don't think the weight difference is even a factor when you look at the upside of the taller tire, I've always tried to run the tallest tire I can on my car.------------------
Butch
460 powered 1967 Comet Cyclone (Broken)
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 03-02-2003 07:36 PM
This is the kinda of info I was looking for.
Butch I was thinking that a 3.80 would still work better off the line.PS. hows the mustang project coming along.Do you think you'll be racing this summer. ------------------
SCOOP
oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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Moneymaker
Administrator Posts: 21725
From: Lyons, IL, USA
Registered: May 99
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posted 03-02-2003 08:13 PM
3.40's are girlyman gears.  ------------------
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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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 03-02-2003 08:17 PM
I know but they were at the right price $70 including the trac loc.
What gears would you run with my weak old motor.------------------
SCOOP
oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
IP: Logged |
Trailer_Trash
Gearhead Posts: 428
From: Alpharetta, Ga, US
Registered: Jan 2003
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posted 03-02-2003 09:08 PM
it makes me sad to hear people refer to their motors as "weak and old"
i like people saying they have "strong and young motors" it sounds less depressing
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Trailer_Trash
Gearhead Posts: 428
From: Alpharetta, Ga, US
Registered: Jan 2003
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posted 03-02-2003 09:12 PM
quote:
Originally posted by Butch Jennings:
[b]I've always looked at it the opposite of you guys. A taller tire has a bigger footprint than a shorter tire.b]
traction-wise, you could make up for the smaller footprint of a smaller tire by getting a wide small tire.
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Butch Jennings
Gearhead Posts: 611
From: No. California
Registered: Apr 2000
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posted 03-02-2003 10:01 PM
quote:
Originally posted by Trailer_Trash:
traction-wise, you could make up for the smaller footprint of a smaller tire by getting a wide small tire.
Sure I could, but why would I do that after having told you why I prefer a taller tire? Ask Alex why he runs a 9" tire for record and head to head class runs and a 10.5" tire in bracket trim.
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Butch
460 powered 1967 Comet Cyclone (Broken)
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
IP: Logged |
Butch Jennings
Gearhead Posts: 611
From: No. California
Registered: Apr 2000
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posted 03-02-2003 10:43 PM
quote:
Originally posted by Fastymz:
PS. hows the mustang project coming along.Do you think you'll be racing this summer.
The Mustang project's not happening, it's a long story, but I got rid of it. I figure to get the Comet running and sell it, but then today I had a guy call me and tell me he has a buddy who might be interested in it as a roller. So I don't know what's gonna happen, if I get anything together to race this year it will be my Comet, but that kinda depends on what happens with this guy. I've had it "sold" twice now and both times the deal fell through.
------------------
Butch
460 powered 1967 Comet Cyclone (Broken)
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
IP: Logged |
Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 03-03-2003 02:05 AM
Butch sorry to hear that,I hope things are going ok for you.Do you have other plains if the Comet does sale.------------------
SCOOP
oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
IP: Logged |
TomP
Gearhead Posts: 5025
From: Delta BC Canada
Registered: Dec 99
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posted 03-04-2003 02:42 AM
a taller tire and the gearing to make it equal to the short tire is a better way to go for the reasons Butch mentions.
IP: Logged |
Butch Jennings
Gearhead Posts: 611
From: No. California
Registered: Apr 2000
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posted 03-04-2003 03:42 AM
quote:
Originally posted by Fastymz:
Butch sorry to hear that,I hope things are going ok for you.Do you have other plains if the Comet does sale.
Thanks Ron,
Things are going well for me, After spending a week in the hospital last year, I'm healthier than I've been in a long time. My family's healthy and I've got a job, the car not running is about the only down side in my life right now. If the Comet sells I'll do another car, not sure exactly what right now, but I'll build something. ------------------
Butch
460 powered 1967 Comet Cyclone (Broken)
10.271 @ 130.231
Butcher's Home Page
"Friends don't let friends drive Chevys"
IP: Logged |
'69Stang
Gearhead Posts: 205
From: Detroit, MI USA
Registered: Jan 2002
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posted 03-04-2003 08:50 AM
Here is a great site for determning RPM's, gear ratios and tire size -
www.randysringandpinion.com/calculators.shtml
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Moneymaker
Administrator Posts: 21725
From: Lyons, IL, USA
Registered: May 99
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posted 03-04-2003 12:23 PM
quote:
Originally posted by Butch Jennings:
I've had it "sold" twice now and both times the deal fell through.
Kinda the way my divorce went down.  ------------------
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
IP: Logged |
Mpcoluv
Gearhead Posts: 1144
From: Charlotte NC usa
Registered: Apr 2001
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posted 03-04-2003 01:06 PM
quote:
Originally posted by Moneymaker:
3.40's are girlyman gears.
Hey!
Statements like that really get my panties in a wad
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 03-04-2003 01:53 PM
quote:
Originally posted by Butch Jennings:
Thanks Ron, Things are going well for me, After spending a week in the hospital last year, I'm healthier than I've been in a long time. My family's healthy and I've got a job, the car not running is about the only down side in my life right now. If the Comet sells I'll do another car, not sure exactly what right now, but I'll build something.
Butch your health is what matters most.Glad to hear all is going good for and your family.Your car will sale it's one of the most cool Comets around. 
You could always build a Black 65 Mustang with a big *** scoop,no wait thats already been done.  ------------------
SCOOP
oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
IP: Logged |
Just Strokin
Gearhead Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 03-05-2003 09:07 AM
Scoop, How about these for your car?  http://www.quicktimeperformance.com/qtec.htm ------------------
Larry No fast Fords at this time but one fine cruising 96 F350 CC DRW Power Strokin diesel.
And one rusty 64 Fairlane nick-named the Rust Bucket....And sometimes called the Money Pit... The sounds of a brain dropping into gear.....
"Buzzzzzz.......Click"
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