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Rpm vs mph - Printable Version

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Rpm vs mph - Willo - 16-11-2012

Hi is it me or does my diesel command hi revs vs road speed ie

3000 rpm @ 70 mph


RE: Rpm vs mph - Mattcheese31 - 16-11-2012

nope that's right . . Smile


RE: Rpm vs mph - Anton - 16-11-2012

Thought it was 2900?


RE: Rpm vs mph - Tom - 16-11-2012

Depends how much fuel your running aswell :p


RE: Rpm vs mph - cwspellowe - 16-11-2012

Well.. no it doesn't Tom


RE: Rpm vs mph - Anton - 16-11-2012

(16-11-2012, 09:46 AM)cwspellowe Wrote: Well.. no it doesn't Tom

ThumbsUp


RE: Rpm vs mph - Tom - 16-11-2012

How so? I cant remember which way it was but in my old d tub if i turned the fuel up or down the revs would sit higher or lower at 70mph it was directly related to fueling Confused


RE: Rpm vs mph - cwspellowe - 16-11-2012

RPM and gearing are what affect road speed. 1000bhp or 100bhp, at the same engine speed and gear ratio you'll be going at the same road speed Wink


RE: Rpm vs mph - Anton - 16-11-2012

lol oh dear.......


RE: Rpm vs mph - Tom - 16-11-2012

(16-11-2012, 09:50 AM)cwspellowe Wrote: RPM and gearing are what affect road speed. 1000bhp or 100bhp, at the same engine speed and gear ratio you'll be going at the same road speed Wink

Did not know that. Well played Cool


RE: Rpm vs mph - Willo - 16-11-2012

Oh right that's ok then thought it was a bit high


RE: Rpm vs mph - Kwik - 16-11-2012

normal for a dturbo box hdi box is about 500rpm lower that's why myself and others have converted or are converting


RE: Rpm vs mph - Dum-Dum - 16-11-2012

(16-11-2012, 09:21 AM)Willo Wrote: Hi is it me or does my diesel command hi revs vs road speed ie

3000 rpm @ 70 mph
Nah thats about right for a non turbo diesel. A DT or HDi gearbox will drop your revs lower. IIRC the DT is about 2700 at 70mph and the HDi is 2450rpm at 70mph.

If you do want a DT box im putting a HDi box on mine in the next few weeks so you can have my old box for a tenner.







(16-11-2012, 09:49 AM)Tom Wrote: How so? I cant remember which way it was but in my old d tub if i turned the fuel up or down the revs would sit higher or lower at 70mph it was directly related to fueling Confused

Oh Dear. *shakes head*


RE: Rpm vs mph - samass - 16-11-2012

Dum, if the OP dont have that box, i might.

/sneakingin


RE: Rpm vs mph - londondan86 - 16-11-2012

Dt box ftw! The missus 206 hdi is crap for gearing, as soon as the power comes in it is time to change gear. Depends what you want really, iirc the dt box is better for day to day town driving and is much more fun and the hdi box is better for economy runs on the motorway


RE: Rpm vs mph - Kwik - 16-11-2012

lol me being me is the hdi box for town and economy.

dt box is too many gear changes needed for daily driving IMO


RE: Rpm vs mph - strictly_perv - 16-11-2012

My 205's 2800 at 60 due to the small wheels.

Tom, epic face to the palm moment there lol


RE: Rpm vs mph - Tom - 16-11-2012

(16-11-2012, 05:25 PM)strictly_derv Wrote: My 205's 2800 at 60 due to the small wheels.

Tom, epic face to the palm moment there lol

Yep, me = 'tard lol


RE: Rpm vs mph - londondan86 - 16-11-2012

(16-11-2012, 05:20 PM)Kwik Wrote: lol me being me is the hdi box for town and economy.

dt box is too many gear changes needed for daily driving IMO

I just find the power more accessible with the dt box, personal preference I suppose


RE: Rpm vs mph - Kwik - 16-11-2012

exactly swings and roundabouts lol


RE: Rpm vs mph - strictly_perv - 16-11-2012

For town driving would a shorter box be better as you can change earlier at say 1500rpm unlike a longer box where you'd have to change at higher revs to avoid it being too low at the next gear up?
As said swings and round abouts.


RE: Rpm vs mph - Dum-Dum - 16-11-2012

If you have the spread of power then the longer box makes for a more relaxing drive especially on the motorway but if your car has a very peaky power graph then you want the shorter box. also people with bugger all power might want the shorter box incase the car starts struggling on the motorway.


RE: Rpm vs mph - Mattcheese31 - 16-11-2012

my 306 with 405 engine and box does 70mph at 3krpm fyi Smile


RE: Rpm vs mph - Daniel306 - 16-11-2012

Anyone know what RPM a Gti6 dose at 70, and what speed it dose at 5k in 6th


RE: Rpm vs mph - Dum-Dum - 16-11-2012

5th at 7250 in a 6 is 133mph. Completely forgotten what it is in 6th. Got a feeling its 167mph though


RE: Rpm vs mph - Daniel306 - 16-11-2012

I want to know what 5k would be


RE: Rpm vs mph - Niall - 16-11-2012

at 70 in 6th, your at about 3.5k i think.
i can confirm 5k in 6th is just approaching 140mph.....jesus i had to brake hard so i didnt hit the fence at the end of my garden!


RE: Rpm vs mph - cwspellowe - 16-11-2012

(16-11-2012, 10:44 PM)Niall Wrote: at 70 in 6th, your at about 3.5k i think.
i can confirm 5k in 6th is just approaching 140mph.....jesus i had to brake hard so i didnt hit the fence at the end of my garden!


quoted for the fail.

20mph-ish per 1000rpm on a gti6 box. 70mph = 3500rpm. 100mph = 5000rpm.

140mph = 7000rpm with a couple of hundred (more on a p1 Wink) rpm still to go. Not that my car ever hit 140mph ever anywhere especially not racing Mat (oecken) to the Ecosse rolling road up the Stirling motorway. Honest.