Rev limiting rotor- who likes them and who doesn't?

Post by **futurecut** » 30 Dec 2006, 21:30

Fancy buggering about with one but my DG engines done 127.5K and doesn't burn a bit. How likely would i hurt my engine and would it be worth it? Could it limit top speed?

Don't have a rev counter...

rob

Post by **jason k** » 31 Dec 2006, 10:37

i got a 5400 rev cut out on my 2000cc Aircooled motor chap and never go near it wilst on the road. all you will do if you fit one is prevent your motor from overrevving.

Post by **PEET** » 31 Dec 2006, 10:50

I have hit mine a few times and depends on the sort of limiter u have my first one was a limiter i.e it jus bounced the revs but my new one jus sort of cuts it out dead til the revs are lowered.
Personally i wouldnt run without a limiter again (i have done) as the engine jus screamed a bit more and didnt seem to make much difference maybe 500 rpm, only done it on the old engine jus to see what would happen! It don't blow up tho.

Post by **Dan Wood** » 31 Dec 2006, 11:14

My engine busted when my throttle cable got stuck mid gear-change.
A limited rotor might have helped!

Post by **futurecut** » 31 Dec 2006, 12:30

Probably leave it as it is then. Just sometimes that when i'm hard on the gas in second it feels like it tops out, but if i accelerate more smoothly the revs can go higher. To be honest i'm interested in top speed. Van is perfectly driveable but cruise is mostly 55mph. If it's a long flat i can get 60 or higher but to keep 60 my foots to the floor. Probably just the weight.

Thanks people.

Post by **Simon Baxter** » 31 Dec 2006, 13:34

The limiter is set to around 5400 rpm.
All the power and torque has gone by then, so fitting a limited rotor arm will do nothing to hinder performance, it's pointless revving it that hard as you won't go any faster, unless your engine has been uprated to make it produce power further up the rev range (Cam, Big Valves, Big carbs, Balancing etc...)

Post by **Sven** » 31 Dec 2006, 13:53

On a 1.9 dg what revs produce max power?? Handy to know, like Si says, pointless revving past it.

Post by **stevel** » 31 Dec 2006, 15:50

I find that it's the huge gap between gears that gets me. On a long climb, particularly when towing, I find it's worth overreving a bit in 2nd so it doesn't bog down quite so badly when it goes into 3rd.

Steve

Post by **toomanytoys** » 01 Jan 2007, 16:13

a 1.9 DG is all done by about 5k.... no point in going any more.. just more noise and less go...
max power is about 4800..
rev limit rotor is usefull in preventing damage if throttle gets stuck open...!!! or if you lend it to a really hard driver

Mine gets driven hard.. but anything above 5k sounds real painfull in anycase.. it sits quite happily on the autoroute at 3800 - 4000 for hours tho'

Post by **airhead** » 02 Jan 2007, 01:53

If you look at it this way, the diesel engines VW used have a rev limiter on them so they obviously thought it was a good idea themselves. Id go for it.