gear ratio
Thread Starter
Instructor
Joined: Jul 2003
Posts: 241
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From: Huntley Il
gear ratio
Hey everyone, I know that there has been a lot of discussion on this but...I am down to the final decision. As you can see from my sig, I have a stock '91 automatic coupe. It has the 2.59 gear. I am deciding between the 3.07 and 3.45, leaning to the 3.45. I am afraid that an upgrade to 3.07 won't be worth the money.
By the way, I am interested in acceleration and not so concerned with taking speed off of the top end. What do you all think? Thanks.
By the way, I am interested in acceleration and not so concerned with taking speed off of the top end. What do you all think? Thanks.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Re: gear ratio (rbesq)
My vote is for the 3.45's. Other than top speed, the greater concern should be cruising rpms. If you spend little time on the interstate, this will be a minor factor. Good luck, and...
RACE ON!!!
RACE ON!!!
Le Mans Master
Joined: Mar 2002
Posts: 5,889
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From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Re: gear ratio (rbesq)
By the way, I am interested in acceleration and not so concerned with taking speed off of the top end. What do you all think? Thanks.
Burning Brakes
Joined: Feb 2003
Posts: 1,218
Likes: 0
From: Rolla Mo
Re: gear ratio (rbesq)
By the way, I am interested in acceleration and not so concerned with taking speed off of the top end.
:steering: :D
Team Owner
Joined: Sep 2001
Posts: 62,153
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: gear ratio (rbesq)
As long as you dont mind losing anything you had before after 60mph, go right ahead.
Because youll probably lose some tenths in the 1/4mi.
Because youll probably lose some tenths in the 1/4mi.
Burning Brakes
Joined: Feb 2003
Posts: 1,218
Likes: 0
From: Rolla Mo
Re: gear ratio (vader86)
As long as you dont mind losing anything you had before after 60mph, go right ahead.
Because youll probably lose some tenths in the 1/4mi.
Because youll probably lose some tenths in the 1/4mi.
:lol: :lol: :lol:
But I am curious as to why that would happen? Educate us poor unlearned souls! Will he leave the Power Band too soon?
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: gear ratio (Dougs 90)
Yes, in an L98, the powerband is too short for alot of gear, it'll be especially obvious with an automatic.
Now if you mod the intake so that you make usable power at high rpms, no reason why you cant change to lower rear.
Now if you mod the intake so that you make usable power at high rpms, no reason why you cant change to lower rear.
Burning Brakes
Joined: Feb 2003
Posts: 1,218
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From: Rolla Mo
Re: gear ratio (vader86)
Cool, I don't have an L98 anyway, I have a hopped up ZZ4!! And my intake has been modded about as much as you can on the Stock one, can't decide wether to go SuperRam, LT1, or Grumpy's Stealth Ram
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Thread Starter
Instructor
Joined: Jul 2003
Posts: 241
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From: Huntley Il
Re: gear ratio (vader86)
Hey Vader, you wrote:
"Now if you mod the intake so that you make usable power at high rpms, no reason why you cant change to lower rear."
Is a mod to the intake a large/expensive project? Also, does that affect the performance of the vehicle any other way? Thanks
"Now if you mod the intake so that you make usable power at high rpms, no reason why you cant change to lower rear."
Is a mod to the intake a large/expensive project? Also, does that affect the performance of the vehicle any other way? Thanks
Team Owner
Joined: Sep 2001
Posts: 62,153
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: gear ratio (rbesq)
Modding the intake is what just about everybody here with an L98 does, it depends on your power goals or ET goals which route you go.
But I dont think more gear is required than a 3.07 in an A4, for an L98 with the TPI intake or even with Superram (Beach Bum changed from 3.07s to 3.54? or 3.45?, and didnt get any ET gains with his SR). Although it would be necessary for Miniram, not enough people have done the Stealth yet so I dont know about that one.
But I dont think more gear is required than a 3.07 in an A4, for an L98 with the TPI intake or even with Superram (Beach Bum changed from 3.07s to 3.54? or 3.45?, and didnt get any ET gains with his SR). Although it would be necessary for Miniram, not enough people have done the Stealth yet so I dont know about that one.