Rotary Arm rev limiter

Post by **jed the spread** » 30 Sep 2008, 14:54

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

Post by **Mocki** » 30 Sep 2008, 15:00

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

Post by **jed the spread** » 30 Sep 2008, 15:44

Fanks Mocki now i know

jed

Website · Post by **CovKid** » 30 Sep 2008, 17:38

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.

Post by **lloyd** » 30 Sep 2008, 17:45

what /\ /\ said. Not a big deal, but can save an engine now and again when we aren't paying attention.

Website · Post by **syncrosimon** » 30 Sep 2008, 21:44

They do work, listen to this!!!

[IMG:528:432]http://i199.photobucket.com/albums/aa288/syncrosimon/th_MOV00119.jpg[/img]

Post by **Red Westie** » 30 Sep 2008, 21:53

Well I don't remember the rev limiters sounding like a backfire....cus that's what that was.

Martin

Post by **ELVIS** » 30 Sep 2008, 21:59

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..........................

Website · Post by **syncrosimon** » 30 Sep 2008, 22:07

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.

Post by **lloyd** » 01 Oct 2008, 07:12

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.