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Rotary Arm rev limiter
Posted: 30 Sep 2008, 14:54
by jed the spread
Just fitted my 2.1 with a new rotary arm amongst other stuff and got the stuff from GSF. They gave me a rotary arm that looks completely different and at first i thought it was the wrong one. Can someone be kind enough to explain what this new one is for and what it does? Gsf matey recons it should have one of these numbers on as it is the right one and the other is the wrong one
it runs fine with it on like
jed
Posted: 30 Sep 2008, 15:00
by Mocki
the rev limiting one is fat, and has a spring loaded contact that when you reach 5600 revs disconnects the HT .
the non limiting one has no moving parts and looks like a normal rotor .....
either will work, the rev limiting one is the recommended part, but lets be honest, unless you are "the sherrif", you wont rev it that high anyway.... so either will do the job......
the limited ones sometimes fail due to corrosion on the contact
Posted: 30 Sep 2008, 15:44
by jed the spread
Fanks Mocki now i know
jed
Posted: 30 Sep 2008, 17:38
by CovKid
lol - depends how high you have the volume on your stereo as to whether you hear it over-reving or not. Been caught myself like that and the rotor saved the day so no bad thing to have one fitted.
Posted: 30 Sep 2008, 17:45
by lloyd
what /\ /\ said. Not a big deal, but can save an engine now and again when we aren't paying attention.
Posted: 30 Sep 2008, 21:44
by syncrosimon
Posted: 30 Sep 2008, 21:53
by Red Westie
Well I don't remember the rev limiters sounding like a backfire....cus that's what that was.
Martin
Posted: 30 Sep 2008, 21:59
by ELVIS
thats what mine did (before i binned it-but more like a machine gun if you kept it planted) .
seeing as it is a very agricultural type of rev limiter , fuel is still being introduced at WOT type quantities.surely it is still going thr the engine unburnt and landing on a very hot exhaust/manifold.
I guess this is the result..........................
Posted: 30 Sep 2008, 22:07
by syncrosimon
Red Westie wrote:Well I don't remember the rev limiters sounding like a backfire....cus that's what that was.
Martin
The operator thought he had blown the engine, you should have seen the frightened look on his face!!
Yeah, on the road in 2nd, 3rd and 4th it cant accelerate as fast as on the rolling road, so you get a clipping juddering type sensation, only had a bang like that in first gear!!!
I dont know why they couldnt incoporate a rev limiter in the ECU which would cut fuel.
Posted: 01 Oct 2008, 07:12
by lloyd
Never had one bang like that. Always the jutter. Used to build some big type 1 engines.. up to 2.4 (86x94), twin carbs, head work, header, etc. All street engines left shop with a 4500 rev-limiting rotor. All were told not to go over 4000 until I had re-tuned at 500 miles... amazing how many came back complaining about engine missing when it revved up. That's when I told them what was going on.. lots of red faces, but saved my bacon I'm sure.