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1/8th mile gearing
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DRR Trophy
posted
Have a 2900lbs camaro with 1.80 glide and 5.00 rear gear. Has Hoosier 32x14.5's and runs about a 6.10 to the 1/8th. These are my 1/4 mile gears. How much should I pick up at the 1/8th by going to a 5.83 rear gear? Thanks
 
Posts: 7 | Location: Olympia, Wa | Registered: March 12, 2013Reply With QuoteReport This Post
DRR S/Pro
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Very little, if any...


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Posts: 1870 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
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not enough to justify the $ and time.


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Posts: 8562 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR S/Pro
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I prefer to gear my car for 1/4 mile even though most all tracks down here run 1/8 mile. I do that to be easier on motor and leave softer in the heat while still having the option to run 1/4 mile.
With that said I do not think it would help you much on et and may hurt consistency.


"Our products are not designed for ED, they are designed for COMPETITIVE RACERS"

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Posts: 1169 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
DRR Trophy
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quote:
Originally posted by Curly1:
I prefer to gear my car for 1/4 mile even though most all tracks down here run 1/8 mile. I do that to be easier on motor and leave softer in the heat while still having the option to run 1/4 mile.
With that said I do not think it would help you much on et and may hurt consistency.



I AGREE
 
Posts: 176 | Location: SOUTH LOUISIANA | Registered: December 01, 2009Reply With QuoteReport This Post
DRR Trophy
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Guys I'm just curious because I'm going to do a little heads up 1/8 mile racing
 
Posts: 7 | Location: Olympia, Wa | Registered: March 12, 2013Reply With QuoteReport This Post
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Leave the 5.0 gear in the car, going to the 5.83 is not worth the money, instead buy a fiberglass hood.

Bob
 
Posts: 2119 | Location: Lakeside, Ca | Registered: February 15, 2003Reply With QuoteReport This Post
DRR Trophy
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Well it won't cost me anything because I have the 3rd laying around ready to go so it's not that lol just wondering what it actually will do lol
 
Posts: 7 | Location: Olympia, Wa | Registered: March 12, 2013Reply With QuoteReport This Post
DRR S/Pro
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Since you have the 5.83, throw it in and see what happens. My guess is it won't make much of a change in ET but it might hurt the consistency. Take a 10 run average and see if it is as consistent.

Hey Craft, Mike is headed your way this weekend, towing to Jacksonville.

Bob
 
Posts: 2119 | Location: Lakeside, Ca | Registered: February 15, 2003Reply With QuoteReport This Post
DRR Sportsman
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Let us know what you pick up. Your not shifting on time are you...??? (Kidding!)

I would add a bit of air to the rears possibly.
 
Posts: 924 | Location: Illinois | Registered: July 27, 2006Reply With QuoteReport This Post



DRR Sportsman
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I agree. Try it. It is the only way to tell. I'd keep the 5.00 gear and consider a 1.98 planetary.


Mike Allred
 
Posts: 231 | Location: Fayetteville, NC | Registered: March 10, 2004Reply With QuoteReport This Post
DRR Pro
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When you say heads up, just what does that mean?

I'm at 4.88 now and if I spray 100 it's spot on for my little small block. Going 5.0's.

https://www.youtube.com/watch?v=ZHE-18x4yjA

I've been 4.98 with 150 shot.


Don't make it harder than it is!
 
Posts: 941 | Location: Ft. Lauderdale, Florida | Registered: March 11, 2002Reply With QuoteReport This Post
DRR Sportsman
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Put it in there! I had a 5.0 gear in my sbc dragster.
 
Posts: 474 | Location: here | Registered: February 12, 2006Reply With QuoteReport This Post
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quote:
Originally posted by Brad Craig:
Well it won't cost me anything because I have the 3rd laying around ready to go so it's not that lol just wondering what it actually will do lol

Well I suspect if it helps at all on ET it will be minimal and think it will probably hurt consistency.
With that said since you have it go ahead and try it and let us know how it does. Since you already have it will not hurt to try it.


"Our products are not designed for ED, they are designed for COMPETITIVE RACERS"

2X SHRA NE2 CHAMPION.
 
Posts: 1169 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
DRR Trophy
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I too don't think you'll pick up any in ET, but in my experience, more gear always equaled more consistency.


David Hammons
 
Posts: 48 | Location: gulfport ms | Registered: December 19, 2009Reply With QuoteReport This Post
DRR Trophy
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quote:
Hey Craft, Mike is headed your way this weekend, towing to Jacksonville.

THATS A LONG TRIP, I HOPE HE CAN AVOID THE BAD WEATHER. THE IHRA RACE FOR THIS WEEKEND AT SCR WAS CANCELLED FOR THE SECOND TIME AND NOT RESCHEDULED.
 
Posts: 176 | Location: SOUTH LOUISIANA | Registered: December 01, 2009Reply With QuoteReport This Post
DRR Sportsman
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To the O.P. - How close (or beyond) peak power is your RPM at the stripe with the 5.00 gear?
If already close to or past peak RPM, you could actually fall off by adding more gear.


Dan "Jim" Moore
This year = "Transbrake Jim"
Much too young to feel this damn old!!
 
Posts: 421 | Location: Dallas, TX  | Registered: December 05, 2002Reply With QuoteReport This Post
DRR Trophy
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Peak power seems to be about 7300 based on performance shifting at that point. I don't have a dyno sheet to say different. In the 1/4 mile it crosses the finish line at 7500 which is holding good power and not falling off in power at that point but also isn't gaining anything. I am unsure what the rpm is at the 1/8 mile mark. I would assume about 6700. I feel the car is geared correctly for 1/4 mile racing FYI
 
Posts: 7 | Location: Olympia, Wa | Registered: March 12, 2013Reply With QuoteReport This Post
DRR Trophy
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So I put in the 5.83 and made a couple test passes Sunday. Picked up the car .05 from the 60' and held it through the 1/8th.
 
Posts: 7 | Location: Olympia, Wa | Registered: March 12, 2013Reply With QuoteReport This Post
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quote:
Originally posted by Brad Craig:
So I put in the 5.83 and made a couple test passes Sunday. Picked up the car .05 from the 60' and held it through the 1/8th.


Nice, glad to hear it helped. Was the air close so you are sure it was all the gear that made the difference and not weather?
I was thinking it would be .05 or less.


"Our products are not designed for ED, they are designed for COMPETITIVE RACERS"

2X SHRA NE2 CHAMPION.
 
Posts: 1169 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post



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