4.3 gears.....Is it worth the $500? And how much of a difference in the 1/4??
Thread Starter
Joined: Feb 2001
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From: Abingdon, Md
4.3 gears.....Is it worth the $500? And how much of a difference in the 1/4??
So guys......how many of you have done this and noticed a difference in your 1/4 mile times? If so, by how much?
TIA,
Ernie
TIA,
Ernie
Senior Member
Joined: Oct 2001
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From: Abq, NM
wELL i HAVE A 87 TURBO. IT HAS A STAGE 2 PORTED MOTOR, RACE BEARINGS, 3MM APEX SEALS, MAZDATRIX RACE OP SENDING UNIT, LIGHTWEIGHT FLYWHEEL 9LBS., ACT EXTREME PRESSURE PLATE/DISC, AND THE RB 3IN EXHAUST.
MY BUDDY HAS A 90 WITH THE SAME MODS BUT WITHOUT THE PORTED MOTOR AND HE HAS THE 4.30 GEARS AND HE IS RIGHT NEXT TO ME UNTIL WE HIT ABOUT 90 OR SO. IT PISSES ME OFF...
THAT IS MY NEXT UPGRADE, SO I'LL LET YOU KNOW WHAT HAPPENS.
PS. SORRY FOR THE CAPS, MY KEYBOARD IS BROKE!!!!
MY BUDDY HAS A 90 WITH THE SAME MODS BUT WITHOUT THE PORTED MOTOR AND HE HAS THE 4.30 GEARS AND HE IS RIGHT NEXT TO ME UNTIL WE HIT ABOUT 90 OR SO. IT PISSES ME OFF...
THAT IS MY NEXT UPGRADE, SO I'LL LET YOU KNOW WHAT HAPPENS.
PS. SORRY FOR THE CAPS, MY KEYBOARD IS BROKE!!!!
Eats, Sleeps, Dreams Rotary
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From: Stinson Beach, Ca
Originally posted by BlackTurbo2
wELL i HAVE A 87 TURBO. IT HAS A STAGE 2 PORTED MOTOR, RACE BEARINGS, 3MM APEX SEALS, MAZDATRIX RACE OP SENDING UNIT, LIGHTWEIGHT FLYWHEEL 9LBS., ACT EXTREME PRESSURE PLATE/DISC, AND THE RB 3IN EXHAUST.
MY BUDDY HAS A 90 WITH THE SAME MODS BUT WITHOUT THE PORTED MOTOR AND HE HAS THE 4.30 GEARS AND HE IS RIGHT NEXT TO ME UNTIL WE HIT ABOUT 90 OR SO. IT PISSES ME OFF...
THAT IS MY NEXT UPGRADE, SO I'LL LET YOU KNOW WHAT HAPPENS.
PS. SORRY FOR THE CAPS, MY KEYBOARD IS BROKE!!!!
wELL i HAVE A 87 TURBO. IT HAS A STAGE 2 PORTED MOTOR, RACE BEARINGS, 3MM APEX SEALS, MAZDATRIX RACE OP SENDING UNIT, LIGHTWEIGHT FLYWHEEL 9LBS., ACT EXTREME PRESSURE PLATE/DISC, AND THE RB 3IN EXHAUST.
MY BUDDY HAS A 90 WITH THE SAME MODS BUT WITHOUT THE PORTED MOTOR AND HE HAS THE 4.30 GEARS AND HE IS RIGHT NEXT TO ME UNTIL WE HIT ABOUT 90 OR SO. IT PISSES ME OFF...
THAT IS MY NEXT UPGRADE, SO I'LL LET YOU KNOW WHAT HAPPENS.
PS. SORRY FOR THE CAPS, MY KEYBOARD IS BROKE!!!!
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Adrenaline
Joined: Feb 2001
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From: Long Island, NY
I have also been wondering about upgrading the gears for a long time. I don't think there are too many people on this forum that have done this mod. I guess I have to wait for you to give me back your feedback on the gears. :p
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From: Right Here!
I once raced a TII that had about the same HP as me except he had 4.3's. He took me off the line, but I caught him in 3rd. gear.
I don't think you would notice any difference in the 1/4.
It would be faster off the line, but you would make it up in the end.
I don't think you would notice any difference in the 1/4.
It would be faster off the line, but you would make it up in the end.
Three spinning triangles
Joined: Apr 2001
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From: Been all around this world and still call Texas home (Ft Worth)
3.90's would get you lower rpm for better economy and slower times.
4.30's will cause you to run higher rpm at lower speeds so you'll accelerate faster.
Its just math
4.30's will cause you to run higher rpm at lower speeds so you'll accelerate faster.
Its just math
Rotary Enthusiast
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From: Right Here!
Originally posted by PaulC
3.90's would get you lower rpm for better economy and slower times.
4.30's will cause you to run higher rpm at lower speeds so you'll accelerate faster.
Its just math
3.90's would get you lower rpm for better economy and slower times.
4.30's will cause you to run higher rpm at lower speeds so you'll accelerate faster.
Its just math
Here's a chart.
http://www.rx7.com/cgi-local/2catalog.cgi?cat=2&part=6
20B N/A Wide Body FC3S
Joined: Feb 2001
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From: Okinawa Japan
Originally posted by Roy Johnson, Jr
Unless I'm mistaken, there is no way to recalibrate your speedo to show correct MPH if you make the gear switch.
Unless I'm mistaken, there is no way to recalibrate your speedo to show correct MPH if you make the gear switch.
The 4.3 will keep you in the power band better when racing... If your going to drag this is what you want... even better would be to put in a 4.7 final and a Close Ratio gearset in the tranny...
On a long vacation
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From: Bay Area, CA, U.S.A.
Originally posted by Node
hmmmm, what about w/ an aftermarket ECU like motec or haltek or wolf3d. Could you recalibrate the speedometer then?
hmmmm, what about w/ an aftermarket ECU like motec or haltek or wolf3d. Could you recalibrate the speedometer then?
Rotary Enthusiast
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From: The First State
Ernie, Get your car running right first then play with the gearing 
Are you gonna be using slicks once you get the car running right? Once you use the slicks the gear ratio will change so use that as a factor for drag racing your street car and sizing your slicks. Just to let you know, I have 4.88 gears on my ford 9" rear setup with 29.5" x 13.5" tires, hopefully I will be around redline when finishing the 1/4th. The 4.3 should do you fine. no need to go as huge as a 4.7
Are you gonna be using slicks once you get the car running right? Once you use the slicks the gear ratio will change so use that as a factor for drag racing your street car and sizing your slicks. Just to let you know, I have 4.88 gears on my ford 9" rear setup with 29.5" x 13.5" tires, hopefully I will be around redline when finishing the 1/4th. The 4.3 should do you fine. no need to go as huge as a 4.7
Eats, Sleeps, Dreams Rotary
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From: Stinson Beach, Ca
Originally posted by 13BAce
The speedometer doesn't have anything to do with the ECU.
The speedometer doesn't have anything to do with the ECU.
Eats, Sleeps, Dreams Rotary
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From: Stinson Beach, Ca
How hard is it to swap end gears?
And what will replace stock end gears? (Series 4 T2 mainly in question)
http://www.mazdatrix.com/g6.htm
http://www.rx7.com/cgi-local/2catalog.cgi?cat=2&part=6 <---FC
http://www.rx7.com/cgi-local/3catalog.cgi?cat=2&part=6 <---FD
And what will replace stock end gears? (Series 4 T2 mainly in question)
http://www.mazdatrix.com/g6.htm
http://www.rx7.com/cgi-local/2catalog.cgi?cat=2&part=6 <---FC
http://www.rx7.com/cgi-local/3catalog.cgi?cat=2&part=6 <---FD