Save revs limit for continued long use?

Zebedee

What sort of revs can a turbo diesel engine be run at for a considerable length of time (say over an hour or so)?

Would around the 3000rpm mark be OK?

Bugsy_malone 666 · Posted: Wed Jan 07, 2009 10:01 pm Post subject:

what diesel?

i had a 1600 N/A golf diesel in my bay and I drove that at something like 2800-3000rpm (at a guess as I have no rev counter but when it was petrol i did) for several hours for 225 miles with just a couple of breaks, should be fine as long as its uptogether well maintained and the cooling system works fine Happy

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Zebedee · Posted: Thu Jan 08, 2009 10:37 am Post subject:

Just any turbo diesel in general really.

I suppose ragging it along at max revs for hours on end wouldn't do it much good but wondered if keeping it around the max torque revs would be OK.
Thats about 2400-3400revs for the VW 1.6TD according to the info i have.

13 window deluxe · Posted: Thu Jan 08, 2009 5:20 pm Post subject:

vw say the industrial diesel engine maximum constant rev limit is 3600 rpm so i go with that

to be honest power tapers of after that especially on the longer stroke crankshafts of the bigger diesels if your reving much higher than that you need a higher gear!
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1964 rat 13 window deluxe 1Z tdi,
1975 rhd twin slider tintop (TBA)
1991 golf 2 gti with tweaked AHU tdi,

previous tdi swaps: gone but not forgotten
1979 rhd twin slider tintop bay ahu 1.9tdi
1990 T25 1Z 1.9tdi
1993 suzuki samurai with 1Z 1.9tdi

Zebedee · Posted: Thu Jan 08, 2009 7:57 pm Post subject:

That means about 60mph on a 1.6 lawn mower gearbox and 68mph on a 2litre box.

Cool. Happy

andymacdonald30 · Initiate Jedi Joined: 18 Jun 2008 Posts: 48

As a diesel engine is limited by the manufacturer to the maximum revs they think it will cope with whilst still being reliable
It stands to reason that flat out for extended periods of time is well with in the spec of the motor

It is slightly different if it is under extreme load i.e. towing a 20 ft caravan or something
But under normal conditions with normal weights just go for it

The reason for lower revs is fuel economy
Get a more powerful motor, higher gears, and get more miles to the gallon

Andy
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2002 T4 2.5 tdi
1987 T25 1.9 D

billy739 · Posted: Fri Feb 27, 2009 9:22 am Post subject: revs

pretty sure the peugeot PSA engine is goverend at 5200 rpm!
major advantage over the vw unit , this is even a problem with vw tdi and aaz engine

andymacdonald30 · Initiate Jedi Joined: 18 Jun 2008 Posts: 48

My Dad has a citroen 1.9tdi car and the revs go up to 5,500 max

So I prsume that other Pug diesel tdi do as well

But you can always turn up the pump a little and get an extra couple of hundred rpm

Andy
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2002 T4 2.5 tdi
1987 T25 1.9 D

jp · Posted: Thu Mar 05, 2009 10:48 pm Post subject:

I'm driving my father inlaws vauxhall corsa (i think) ex postie van CDTI or summut atm and had it revving over 6k !! most bizzarre It actually shows red line at 6.5k I was a bit concerned at first as I had put a tenner of diesel in it and got paranoid that it was in fact a petrol !!! had to stop and flip the bonnet to be sure Grin

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1971 Devon Bay with 1800 Ford Turbo Diesel Engine (wip)
1983 VW Golf GTI Campaign
1979 Mini 1275 GT
2013 Scirocco TDI GT