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General => The garage => Topic started by: forzanerazzurri on 22 November 2003, 22:26

Title: RPM at motorway speed
Post by: forzanerazzurri on 22 November 2003, 22:26
i have an MK2 85 gti and am concerned about how high my engine revs at motorway speeds,  i usually do around 130 km/h on the motorway in 5th gear my RPM is usually a scary 5000 (or so) RPM and i am worried about rning at that high of an RPMat long periods with my engine thats getting tired (180000 km).
Title: Re:RPM at motorway speed
Post by: mk1 on 23 November 2003, 00:05
RPM's dont wear engines out. Dirty oil or over heating do. If thats the correct gear box for your car, it should not be a broblem. 180,000km on a VW , it is just starting to loosen up ;).
Steve.
Title: Re:RPM at motorway speed
Post by: Dizzie on 23 November 2003, 00:15
if I cruise for miles on the motorway at 5000rpm the oil temp will be higher than usual like 110?c, but I don't think it hurts the engine. not in 5th anyway.
Title: Re:RPM at motorway speed
Post by: Overseer on 23 November 2003, 00:21
whats 130 km/h ?

http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&q=130+kph+in+mph (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&q=130+kph+in+mph)

google rules ;)


80mph.. yeah thats mway speed..
Title: Re:RPM at motorway speed
Post by: tinman on 23 November 2003, 12:45
guy guys - reality check here.

5k at 80? it should be 5k at 100 in 5th.

Tin
Title: Re:RPM at motorway speed
Post by: Overseer on 23 November 2003, 12:47
yeah i just went out for a sunday morning 'lap' of the county.. lol

80 mph = around 3000 rpm


i think mine used to be higher before i had the cambelt changed
Title: Re:RPM at motorway speed
Post by: Leejaydoob on 23 November 2003, 14:52
Quote from: tinman on 23 November 2003, 12:45
guy guys - reality check here.

5k at 80? it should be 5k at 100 in 5th.

Tin
thats right
mine is
60mph =3000rpm
80mph= 4000rpm
100mph= 5000rpm

in 5th gear
Title: Re:RPM at motorway speed
Post by: tinman on 23 November 2003, 15:57
Quote from: Overseer on 23 November 2003, 12:47
i think mine used to be higher before i had the cambelt changed

strange gearbox and engine you have....
Title: Re:RPM at motorway speed
Post by: Overseer on 23 November 2003, 16:30
well the car defintely idle'd too high before i had it sorted.. the engine would race too.. once i got it back it behaves how one would expect.. they only changed the cambelt, alternator belt and power steering belt..
Title: Re:RPM at motorway speed
Post by: forzanerazzurri on 24 November 2003, 08:33
right my mistake,  but anyhow running it at 4000 RPM in 5th for a long time wont wear the engine?
Title: Re:RPM at motorway speed
Post by: Blue MK2 on 24 November 2003, 10:03
As long as you are off the red-line should be okay mate.

What speed are you doing at 4000rpm in 5th?
Title: Re:RPM at motorway speed
Post by: Helios_Blue_Valver on 24 November 2003, 19:22
Quote from: Overseer on 23 November 2003, 16:30
well the car defintely idle'd too high before i had it sorted.. the engine would race too.. once i got it back it behaves how one would expect.. they only changed the cambelt, alternator belt and power steering belt..

If they had the upper intake manifold off to change the timing belt then they resealed it. even the slightest air leak in the intake will mess with the idle. :)
Title: Re:RPM at motorway speed
Post by: forzanerazzurri on 25 November 2003, 07:12
no thats right at 80 MPH im doing 4000 rpm in 5th,