Average RPM's?

Tigerwhite1 · September 23rd, 2008, 10:53 AM

OK, so I noticed while riding with a good friend of mine (he has a 98 V6) that his RPM's were only at about 1200 at 55mph, and they only went up to about 1700 at 70mph. Of course if he accelerates quickly they will jump to redline, but driving at a steady speed they seem so low! In my 2003 the rpms are usually 500 higher then his. about 1600-1700 at 55mph about about 2000-2200 around 70-75. What is the cause of this, and who has normal rpm's? we haven't noticed us doing anything different while driving that would effect the rpms like that. I know with his car being that year, he only has a single port engine, but i didn't think that was the cause. And if anyone has any suggestions on how to get lower rpm's while driving at a steady speed please let me know.

BTW, both of our cars are stock performance wise as far as we know.
Thanks!

HMUSN · September 23rd, 2008, 10:56 AM

you guys have different transmissions is all.

riddlee josh · September 23rd, 2008, 11:48 AM

they also have dif rear end gears

Blainestang · September 23rd, 2008, 03:54 PM

He has 2.73 gears... you have 3.27 gears.

You said the following:

Him = 1700rpm @ 70mph
You = 2000rpm @ 70mph

(1700rpm) / (2.73) X (3.27) = 2036rpm

Tigerwhite1 · September 24th, 2008, 10:32 AM

I see, that makes sense, lol. I didn't think about different gears. So if I bought 4.10 gears, then I would have even higher rpms? Thanks for your help everyone, that has annoyed me for the past week or so!

Blainestang · September 24th, 2008, 11:01 AM

Originally Posted by Tigerwhite1

I see, that makes sense, lol. I didn't think about different gears. So if I bought 4.10 gears, then I would have even higher rpms? Thanks for your help everyone, that has annoyed me for the past week or so!

Yes, given that the gear you're in and the speed are the same, your RPMs would be much higher with 4.10's.

03SonicBoom · September 25th, 2008, 08:31 AM

I run 2000rpm at exactly 75mph

September 23rd, 2008, 10:53 AM	#1
Tigerwhite1 Regular 2003 Mustang V6 Auto Join Date: Jun 2008 Location: Missouri Posts: 340 iTrader: 0 reviews	Average RPM's? OK, so I noticed while riding with a good friend of mine (he has a 98 V6) that his RPM's were only at about 1200 at 55mph, and they only went up to about 1700 at 70mph. Of course if he accelerates quickly they will jump to redline, but driving at a steady speed they seem so low! In my 2003 the rpms are usually 500 higher then his. about 1600-1700 at 55mph about about 2000-2200 around 70-75. What is the cause of this, and who has normal rpm's? we haven't noticed us doing anything different while driving that would effect the rpms like that. I know with his car being that year, he only has a single port engine, but i didn't think that was the cause. And if anyone has any suggestions on how to get lower rpm's while driving at a steady speed please let me know. BTW, both of our cars are stock performance wise as far as we know. Thanks! __________________ 03 V6 Stang - Auto - Custom gauges (stock at day, red at night ) 97 V6 Stang - 04 Drivetrain - Sold for 67 '07 Ninja 650R - Sold for F4i '95 V6 Stang - 5-speed Vert 67 V8 Stang - Coupe w/ 4bbl 302 '02 Honda CBR600 F4i '85 Firebird - v6 5spd

September 23rd, 2008, 10:56 AM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,044 iTrader: 10 reviews	you guys have different transmissions is all. __________________

September 23rd, 2008, 11:48 AM	#3
riddlee josh Enthusiast 1998 mustang 3.8l v6 Join Date: Nov 2007 Location: portsmouth ohio Posts: 811 iTrader: 0 reviews	they also have dif rear end gears __________________ RACING because baseball,basketball, bowling,football, and golf only require one ball

September 23rd, 2008, 03:54 PM	#4
Blainestang Regular Join Date: Dec 2007 Location: Tampa, FL Posts: 452 iTrader: 0 reviews	He has 2.73 gears... you have 3.27 gears. You said the following: Him = 1700rpm @ 70mph You = 2000rpm @ 70mph (1700rpm) / (2.73) X (3.27) = 2036rpm __________________ 1993 2.3L Coupe [Motortopia] : Open-Track Project... 216k miles 2000 V6 (Black,5-speed) [Motortopia] : Heads/Cam (EXHAUST CLIP) 2001 Harley Davidson F-150 Acts 16:31

September 24th, 2008, 10:32 AM	#5
Tigerwhite1 Regular 2003 Mustang V6 Auto Join Date: Jun 2008 Location: Missouri Posts: 340 iTrader: 0 reviews	I see, that makes sense, lol. I didn't think about different gears. So if I bought 4.10 gears, then I would have even higher rpms? Thanks for your help everyone, that has annoyed me for the past week or so! __________________ 03 V6 Stang - Auto - Custom gauges (stock at day, red at night ) 97 V6 Stang - 04 Drivetrain - Sold for 67 '07 Ninja 650R - Sold for F4i '95 V6 Stang - 5-speed Vert 67 V8 Stang - Coupe w/ 4bbl 302 '02 Honda CBR600 F4i '85 Firebird - v6 5spd

September 25th, 2008, 08:31 AM	#7
03SonicBoom Moderator 2003 Grand Cherokee Join Date: Jul 2008 Location: Indiana Posts: 6,591 iTrader: 0 reviews	I run 2000rpm at exactly 75mph __________________

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