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Author Topic:   How can I change my gearing with tire size
prelude
Dirt Newbie

Total posts: 3
posted June 01, 2003 09:22 AM  
I'm new to racing and I have a 1986 Honda Prelude that I am racing in a 4cyl stock class. We are not able to change anything on the car all must remain stock. I have a 5 speed standard tranny. I just ran my first race on a 4/10 mile track with 12 degree banking. I found 2nd gear was good in the corners but on the straight it was not tall enough. The car redlines at 6200 rpm and I was running about 6000 rpm on the straight aways. If I shifted into third the rpm dropped to about 2500 and I had no snap.

The corner would come up and I would have to shift and would be backup around 6000. I need to get a taller 2nd or shorter 3rd by changing tire size. Any suggestions?


The other problem is that we must run stock tires and the tires I am running are Bridgestone Turanza's which is like a touring tire. I was also running full tire pressure. The tires were slipping until about the 10th lap and then the track started to tackup abit. Any suggestions for setup?

Anything would be much appreciated.

wizzard
Dirt Freak

Total posts: 306
posted June 01, 2003 10:05 AM  
if you run a shorter tire would be like runin a lower gear and a taller tire would be like runin a higher gear.id probly go with a shorter set and run 3rd.if your car has a rev.limiter id unhook it.

racer41
Dirt Full Roller

Total posts: 70
posted June 01, 2003 08:04 PM  
you can do two thangs

1st running 2nd/use a taller tire like p185/14 etc....

2nd running 3rd use a smaller tire like p155/14 etc...

do you see what i am trying to say?

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racer41
live it to the edge

prelude
Dirt Newbie

Total posts: 3
posted June 01, 2003 09:41 PM  
Any suggestion for the type or make of tire to run. It has to be a stock road tire and cannot be a mud or snow tire.
quote:
Originally posted by racer41:
you can do two thangs

1st running 2nd/use a taller tire like p185/14 etc....

2nd running 3rd use a smaller tire like p155/14 etc...

do you see what i am trying to say?



Pete Gossett
Dirt Roller

Total posts: 6
posted June 01, 2003 09:47 PM  
Where do you race? I just picked up an 85 Prelude that I'm going to build up & try the hornet class at Vermilion Co. speedway in Danville, IL. I'd like to swap any setup ideas you might have, too.

prelude
Dirt Newbie

Total posts: 3
posted June 01, 2003 10:01 PM  
I am racing at Victory Lanes Speedway stock 4 cyl class in Winnipeg, Manitoba Canada. I would like to swap setup information. We have a really fast Toyota Celica and a Turbo Ford Probe. I would love to try and catch.
quote:
Originally posted by Pete Gossett:
Where do you race? I just picked up an 85 Prelude that I'm going to build up & try the hornet class at Vermilion Co. speedway in Danville, IL. I'd like to swap any setup ideas you might have, too.


racer41
Dirt Full Roller

Total posts: 70
posted June 02, 2003 10:59 AM  
quote: Any suggestion for the type or make of tire to run. It has to be a stock road tire and cannot be a mud or snow tire.


I WOULD TRY WHAT YOU ARE RUNNING NOW THAT WAY IT WOULD HAVE THE SAME FEEL TO YOU AND YOU WOULD KNOW WHERE TO RUN THE TIRE PRES. AT.
IF YOU DONT WONT TO JUST A GOOD ROAD TIRE SHOUD DO THE JOB.

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racer41
live it to the edge

t.nie
Dirt Roller

Total posts: 10
posted June 04, 2003 10:48 AM  
Heres what I would do. Go look at what the top three or four guys are running, that would be a good indicator of a decent tire for the class your in. They are fast on those tires, so thats probably a good place for you to start, at least brand wise. And I would think that changing to a shorter tire, and if you can find one that was stock at some point for that car, a smaller wheel, and trying to get the car to pull all the way in third would probably be about as good as it gets. Going taller just raises the whole car and its center of gravity, which isnt going to help a lot.

[This message has been edited by t.nie (edited June 04, 2003).]

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