RX8Club.com

Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.

6th gear

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 04-06-2009, 09:41 PM
  #1  
Registered User
Thread Starter
 
blackmagic99's Avatar
 
Join Date: Mar 2009
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
6th gear
In 6th gear on the interstate my rpms are at 4,000 to 5,000 goin between 70 to 80 mph is that normal

This is an 04
blackmagic99 is offline  
Reply Like
Old 04-06-2009, 09:44 PM
  #2  
The anti-ricer
iTrader: (1)
 
Transam kid 01's Avatar
 
Join Date: Oct 2005
Location: Hillsdale, NJ
Posts: 1,888
Likes: 0
Received 0 Likes on 0 Posts
yes.
Transam kid 01 is offline  
Reply Like
Old 04-06-2009, 09:47 PM
  #3  
Zoom Zoom
 
Sheehan's Avatar
 
Join Date: Dec 2008
Location: Arkansas
Posts: 118
Likes: 0
Received 0 Likes on 0 Posts
Indeed ... thats normal ... Our 8's turn a lot of rpms
Sheehan is offline  
Reply Like
Old 04-06-2009, 09:53 PM
  #4  
The anti-ricer
iTrader: (1)
 
Transam kid 01's Avatar
 
Join Date: Oct 2005
Location: Hillsdale, NJ
Posts: 1,888
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Sheehan
Indeed ... thats normal ... Our 8's turn a lot of rpms
The high RPMs per MPH are b/c the 8 has 4.44s (which is high compared to some other cars)
Transam kid 01 is offline  
Reply Like
Old 04-06-2009, 10:04 PM
  #5  
I <3 Sushi
iTrader: (21)
 
Spinning Sushi's Avatar
 
Join Date: Aug 2006
Location: SoCal
Posts: 3,967
Likes: 0
Received 3 Likes on 3 Posts
Perfectly normal
Spinning Sushi is offline  
Reply Like
Old 04-06-2009, 10:06 PM
  #6  
Registered User
 
gukdoebabdoe's Avatar
 
Join Date: Aug 2007
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
3500rpms is 70mph for me
gukdoebabdoe is offline  
Reply Like
Old 04-06-2009, 10:10 PM
  #7  
Registered
 
shazy's Avatar
 
Join Date: Oct 2008
Location: Montreal,QC
Posts: 2,256
Likes: 0
Received 0 Likes on 0 Posts
3k rpms @ 62.5mph is normal for me
shazy is offline  
Reply Like
Old 04-06-2009, 10:16 PM
  #8  
Senior Member
 
rx8cited's Avatar
 
Join Date: Jul 2003
Location: DC Metro Area, USA
Posts: 1,554
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by blackmagic99
In 6th gear on the interstate my rpms are at 4,000 to 5,000 goin between 70 to 80 mph is that normal

This is an 04
Are your transmission and tire sizes stock?

4000 rpms = 80 mph in my car and another RX-8 owner told me the same. As gukdoebabdoe said, this would be 70 mph @ 3500 rpms. At 5000 you should be going 100 mph !
Last edited by rx8cited; 04-06-2009 at 10:19 PM.
rx8cited is offline  
Reply Like
Old 04-06-2009, 10:28 PM
  #9  
rot8ing
iTrader: (1)
 
myriadshalaks's Avatar
 
Join Date: Feb 2007
Location: merritt island, fl
Posts: 1,538
Likes: 0
Received 1 Like on 1 Post
that seems a bit high to me. there is an exact answer to this.

in 3rd, 70 mph is 7000 rpms

this is true, i assume, for all stock rx8s.

not sure what it is in 6th, but there's a mathematical formula available to find it. i'm not sure what that is either.
myriadshalaks is offline  
Reply Like
Old 04-06-2009, 10:45 PM
  #10  
Administrator
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,958
Received 115 Likes on 88 Posts
Originally Posted by blackmagic99
In 6th gear on the interstate my rpms are at 4,000 to 5,000 goin between 70 to 80 mph is that normal

This is an 04
how could it be otherwise?
zoom44 is offline  
Reply Like
Old 04-06-2009, 11:15 PM
  #11  
Senior Member
 
rx8cited's Avatar
 
Join Date: Jul 2003
Location: DC Metro Area, USA
Posts: 1,554
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by myriadshalaks
.....
not sure what it is in 6th, but there's a mathematical formula available to find it. i'm not sure what that is either.
Formula for 04 GT:
(tach reading in 6th gear / 1000) * 20 mph = speedometer reading in 6th gear
rx8cited is offline  
Reply Like
Old 04-07-2009, 01:16 PM
  #12  
Hit & Run Magnet
iTrader: (3)
 
kersh4w's Avatar
 
Join Date: May 2007
Location: DC Area
Posts: 6,690
Likes: 0
Received 3 Likes on 3 Posts
in 6th gear, every 20mph is 1k rpm.

2k rpm = 40mph
3k rpm = 60mph
4k rpm = 80mph
5k rpm = 100mph
6k rpm = 120mph
7k rpm = 140mph
8k rpm = 160mph
9k rpm = 180mph

at least for me. i dont know about the last half personally, but its been accurate for the first half. my tires are 245/40/18.
kersh4w is offline  
Reply Like
Old 04-07-2009, 10:00 PM
  #13  
Registered User
 
mrinno's Avatar
 
Join Date: Sep 2008
Location: San Gabriel, Ca
Posts: 167
Likes: 0
Received 0 Likes on 0 Posts
Yeah, 80 at 4k for me
mrinno is offline  
Reply Like
Old 02-02-2010, 12:44 PM
  #14  
Registered
iTrader: (7)
 
silverbullet05's Avatar
 
Join Date: Aug 2009
Location: San Antonio, TX
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
i wish 6th was taller.... would definitely help highway mpg's =/
silverbullet05 is offline  
Reply Like
Old 02-02-2010, 03:11 PM
  #15  
Registered
 
meowmeows's Avatar
 
Join Date: Sep 2009
Posts: 11
Likes: 0
Received 0 Likes on 0 Posts
Yup, I wish 6th were 3k @ 70mph..
meowmeows is offline  
Reply Like
Old 02-02-2010, 03:13 PM
  #16  
I <3 Sushi
iTrader: (21)
 
Spinning Sushi's Avatar
 
Join Date: Aug 2006
Location: SoCal
Posts: 3,967
Likes: 0
Received 3 Likes on 3 Posts
Damn nubz....



Attached Thumbnails 6th gear-speed-rpm.gif  
Spinning Sushi is offline  
Reply Like
Old 02-02-2010, 07:10 PM
  #17  
Registered User
 
Eddie54's Avatar
 
Join Date: Feb 2010
Location: Alameda, CA
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
sounds about right....
Eddie54 is offline  
Reply Like
Old 02-02-2010, 09:57 PM
  #18  
Registered User
 
mrinno's Avatar
 
Join Date: Sep 2008
Location: San Gabriel, Ca
Posts: 167
Likes: 0
Received 0 Likes on 0 Posts
After 10 months ??
mrinno is offline  
Reply Like
Old 02-02-2010, 11:28 PM
  #19  
Registered
 
jasonrxeight's Avatar
 
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,487
Likes: 0
Received 3 Likes on 3 Posts
very very normal
jasonrxeight is offline  
Reply Like
Old 02-03-2010, 10:26 AM
  #20  
Registered
iTrader: (7)
 
silverbullet05's Avatar
 
Join Date: Aug 2009
Location: San Antonio, TX
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
there should be a mod for taller gearing in 6th....lol
the scion tC i used to have also revved pretty high too. at around 80mph in 5th it was close to 4k. does crap for hwy mpg's.....
silverbullet05 is offline  
Reply Like
Old 02-03-2010, 01:58 PM
  #21  
Registered
 
ken-x8's Avatar
 
Join Date: Aug 2006
Location: Northern Virginia
Posts: 5,027
Likes: 0
Received 5 Likes on 5 Posts
The way I remember rpm vs mph for each gear is that at 3000 rpm the speed for 2nd through 6th is pretty close to 10 times the gear number.

That makes it easy to figure out which gear I'm in without looking at the shift lever or remembering what I just did.

Ken
ken-x8 is offline  
Reply Like
Old 02-03-2010, 10:31 PM
  #22  
Zoom-Freakin'-Zoom
iTrader: (5)
 
swoope's Avatar
 
Join Date: Jan 2004
Location: orlando, fl
Posts: 14,602
Received 35 Likes on 31 Posts
Originally Posted by silverbullet05
there should be a mod for taller gearing in 6th....lol
the scion tC i used to have also revved pretty high too. at around 80mph in 5th it was close to 4k. does crap for hwy mpg's.....
there is.

09 transmission
change rear gear
taller tires

beers
swoope is offline  
Reply Like
Old 02-03-2010, 10:48 PM
  #23  
Lighting Yellow
iTrader: (2)
 
HWK11's Avatar
 
Join Date: Sep 2008
Location: west lafayette
Posts: 311
Likes: 0
Received 0 Likes on 0 Posts
anyone know why my 6th gear makes water flowing sound??? it gets too annoying so im driving 70 in 5th gear...
HWK11 is offline  
Reply Like
Old 02-04-2010, 12:17 AM
  #24  
silent assasin
iTrader: (6)
 
rodjonathan's Avatar
 
Join Date: May 2008
Location: Houston
Posts: 3,398
Likes: 0
Received 1 Like on 1 Post
sounds about right wait i have an at how would i know
rodjonathan is offline  
Reply Like
Old 02-04-2010, 05:07 AM
  #25  
Daddy's Home...
iTrader: (2)
 
nikkdizzle's Avatar
 
Join Date: Oct 2008
Location: sevenONEfour
Posts: 793
Likes: 0
Received 0 Likes on 0 Posts
sounds about at..cruising in 6th at 74 mph i'm usually around 4k rpm
nikkdizzle is offline  
Reply Like


You have already rated this thread Rating: Thread Rating: 0 votes, average.
Show Printable Version
Email this Page

Advanced Search
Quick Reply: 6th gear


Reply Closed Thread Share

All times are GMT -5. The time now is 12:34 AM.