RPM to MPH

8589 · 04-03-2009, 01:06 PM

3.000 RPM's = 65 MPH
or
4.000 RPM's = 87-88 MPH

Both numbers in 5 gear, is that about right?

Resurrected · 04-03-2009, 01:09 PM

i would say just about, ive never paid attention to the rpm to mph conversion.

Redfox · 04-03-2009, 02:00 PM

My 3rd gear goes all the way to 80 at 4,000 ish rpms is that normal? i never use 4th or 5th

8589 · 04-03-2009, 02:08 PM

Quote:

Originally Posted by Redfox

My 3rd gear goes all the way to 80 at 4,000 ish rpms is that normal? i never use 4th or 5th

YEAH, THAT'S OK ...4rd is for passing and 5 for jumping bridges/buildings stuff like that

8589 · 04-03-2009, 02:13 PM

Quote:

Originally Posted by Resurrected

i would say just about, ive never paid attention to the rpm to mph conversion.

not very worry but I read of owners doing mid 30's to 40's on a gallon so made me wonder since mine get constant 25 mpg every fill up

Resurrected · 04-03-2009, 02:50 PM

yeah normal.

Redfox · 04-03-2009, 03:22 PM

What about my car making a superchager or electric car noise every once in a while? lol my car has a 5 sfe engine & sometimes makes a cool sounding noise.sounds kinda like the road warrior when he press the button.it happens once in a blue moon but when it does it last a while.

Resurrected · 04-03-2009, 03:34 PM

LOL! please explain this noise a with a bit more detail... does it sound like it has a blow off valve? or does it sound like you have an after market air filter? not sure what your saying?

8589 · 04-03-2009, 03:40 PM

hijacking my own thread..Whats the idea on such claims? (MPG)

8589 · 04-03-2009, 03:51 PM

Quote:

Originally Posted by Redfox

What about my car making a superchager or electric car noise every once in a while? lol my car has a 5 sfe engine & sometimes makes a cool sounding noise.sounds kinda like the road warrior when he press the button.it happens once in a blue moon but when it does it last a while.

I send your Q to a mind reader, she said: engine will blow up in the 6 bluemoon, engine is 5 SFE (short for safe)

mach5mr2 · 04-04-2009, 10:47 PM

My SC seems to get about 20.5 mph per 1000 rpm, so I am at 61.5 mph at 3K rpm and 82 mph at 4K rpm. The NA will be at higher rpms at the same speeds.

John

mr2silvertop · 04-04-2009, 11:49 PM

Riding in high gear on low rpm will get better mileage but fouls plugs faster. I mean you don't want to ride around going under 2500 RPMs. You'll get alot better mileage if you use 5th gear when going 55+. Of course you won't sound like you're destoying your engine.As for the sound, is it when you are slowing down? It may be the tranny whining.

mr3 · 04-05-2009, 09:02 AM

I've heard throwout bearings make a weird noise. I'm only 19 and I dont have much experience with that but from what I've heard they do make noise when they go bad. Maybe?

8589 · 04-05-2009, 10:46 AM

Quote:

Originally Posted by mach5mr2

My SC seems to get about 20.5 mph per 1000 rpm, so I am at 61.5 mph at 3K rpm and 82 mph at 4K rpm. The NA will be at higher rpms at the same speeds.

John

you seems to have mastered your SC

mine is a blend and a foster child so DNA is not available. so appears my engine goes slightly relaxed at highway speeds which I like, thanks.

also PM send

swift978 · 04-05-2009, 11:30 PM

my NA is same as yours mach5, 5000 rpm at 100 mph

Wurtle38 · 02-04-2010, 11:14 PM

could the electric noise be the vent fan for the engine compartment?

Sh0ty · 02-05-2010, 12:19 AM

Just something to think about, your speed to rpm ratio will change with different sized tires and wheels.

328FTW · 02-05-2010, 04:48 AM

Quote:

Originally Posted by Sh0ty

Just something to think about, your speed to rpm ratio will change with different sized tires and wheels.

Yes and I was just looking at different speeds vs RPM for my V6 I didn't get how the rpm was all out of whack for the speed I was doing I was revving lower than I should at 120mph in the end it hit me like a wet fish that my tranny is not an s54 it's an s53 from a celica with different ratios explains why it is different after I blew my box. I'll post some of my numbers dunno if they are 100% right but it is still good for comparison note that 6th is reverse and the tyre size I entered is 205/50/15 which is what I'm running.

The e153 I dunno if I got the right ratios I got it off some website because I couldn't find it on the wiki the rest seem not far off. All in mph.

S54

S53

S51

e153

Papo J · 02-11-2010, 08:24 AM

Quote:

Originally Posted by Sh0ty

Just something to think about, your speed to rpm ratio will change with different sized tires and wheels.

That is partially incorrect, the actual speed will change but the indicated speed will remain the same. The connection between the tranny and speedo is mechanical (cable) and changing tire size won't affect that. Now, if the cops were to point a radar gun at you they would see different speeds depending on how tall or short your tires are but you won't see that on the speedometer.

Sh0ty · 02-11-2010, 09:03 AM

Your speed, not speedo, to rpm ratio will change, so I am 100% correct. Had I said measured or indicated speed, you would be correct.

04-03-2009, 01:06 PM	#1 (permalink)
8589 Cage Fighter Join Date: Mar 2009 Location: Florida Posts: 186 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	RPM to MPH 3.000 RPM's = 65 MPH or 4.000 RPM's = 87-88 MPH Both numbers in 5 gear, is that about right?

04-04-2009, 11:49 PM	#12 (permalink)
mr2silvertop the guy w/da mr2 Join Date: Feb 2007 Location: dallas,georgia Posts: 183 Thanks: 3 Thanked 7 Times in 7 Posts iTrader Rating: (0/0% )	Riding in high gear on low rpm will get better mileage but fouls plugs faster. I mean you don't want to ride around going under 2500 RPMs. You'll get alot better mileage if you use 5th gear when going 55+. Of course you won't sound like you're destoying your engine.As for the sound, is it when you are slowing down? It may be the tranny whining. Last edited by mr2silvertop; 04-13-2009 at 09:12 AM..

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04-03-2009, 01:09 PM	#2 (permalink)
Resurrected I Drift Mine's Join Date: Apr 2009 Location: Idaho Posts: 240 Thanks: 1 Thanked 5 Times in 4 Posts iTrader Rating: (1/100% )	i would say just about, ive never paid attention to the rpm to mph conversion.

04-03-2009, 02:00 PM	#3 (permalink)
Redfox Cage Fighter Join Date: Mar 2008 Location: Bakersfield CA Posts: 224 Thanks: 7 Thanked 8 Times in 8 Posts iTrader Rating: (1/100% )	My 3rd gear goes all the way to 80 at 4,000 ish rpms is that normal? i never use 4th or 5th

04-03-2009, 02:50 PM	#6 (permalink)
Resurrected I Drift Mine's Join Date: Apr 2009 Location: Idaho Posts: 240 Thanks: 1 Thanked 5 Times in 4 Posts iTrader Rating: (1/100% )	yeah normal.

04-03-2009, 03:22 PM	#7 (permalink)
Redfox Cage Fighter Join Date: Mar 2008 Location: Bakersfield CA Posts: 224 Thanks: 7 Thanked 8 Times in 8 Posts iTrader Rating: (1/100% )	What about my car making a superchager or electric car noise every once in a while? lol my car has a 5 sfe engine & sometimes makes a cool sounding noise.sounds kinda like the road warrior when he press the button.it happens once in a blue moon but when it does it last a while.

04-03-2009, 03:34 PM	#8 (permalink)
Resurrected I Drift Mine's Join Date: Apr 2009 Location: Idaho Posts: 240 Thanks: 1 Thanked 5 Times in 4 Posts iTrader Rating: (1/100% )	LOL! please explain this noise a with a bit more detail... does it sound like it has a blow off valve? or does it sound like you have an after market air filter? not sure what your saying?

04-03-2009, 03:40 PM	#9 (permalink)
8589 Cage Fighter Join Date: Mar 2009 Location: Florida Posts: 186 Thanks: 3 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	hijacking my own thread..Whats the idea on such claims? (MPG)

04-04-2009, 10:47 PM	#11 (permalink)
mach5mr2 93T, 88 SC Join Date: Apr 2008 Posts: 107 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (2/100% )	My SC seems to get about 20.5 mph per 1000 rpm, so I am at 61.5 mph at 3K rpm and 82 mph at 4K rpm. The NA will be at higher rpms at the same speeds. John

04-05-2009, 09:02 AM	#13 (permalink)
mr3 unskilled Join Date: Jun 2008 Location: Plymouth Mtg, Pa Posts: 2,406 Thanks: 24 Thanked 98 Times in 93 Posts iTrader Rating: (7/100% )	I've heard throwout bearings make a weird noise. I'm only 19 and I dont have much experience with that but from what I've heard they do make noise when they go bad. Maybe?

04-05-2009, 11:30 PM	#15 (permalink)
swift978 1st! Join Date: Aug 2007 Location: Mass Posts: 85 Thanks: 11 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	my NA is same as yours mach5, 5000 rpm at 100 mph

02-04-2010, 11:14 PM	#16 (permalink)
Wurtle38 No Skills Join Date: Feb 2010 Location: Alamogordo, NM Posts: 38 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	could the electric noise be the vent fan for the engine compartment?

02-05-2010, 12:19 AM	#17 (permalink)
Sh0ty Armchair Racer Join Date: Aug 2008 Location: Novi, MI Posts: 1,273 Thanks: 22 Thanked 57 Times in 54 Posts My Google Map iTrader Rating: (3/100% )	Just something to think about, your speed to rpm ratio will change with different sized tires and wheels.

02-11-2010, 09:03 AM	#20 (permalink)
Sh0ty Armchair Racer Join Date: Aug 2008 Location: Novi, MI Posts: 1,273 Thanks: 22 Thanked 57 Times in 54 Posts My Google Map iTrader Rating: (3/100% )	Your speed, not speedo, to rpm ratio will change, so I am 100% correct. Had I said measured or indicated speed, you would be correct.