harmonic Balancer

TVRleigh · Post by **TVRleigh** » Mon Apr 07, 2008 12:41 pm

Hi Is it ok to mount a trigger wheel to this, or would it move too much. or cause problems.

I'm only going to be running an alternator, and water pump no PAS.

So there will not be as much load as normal.

Post by **katanaman** » Mon Apr 07, 2008 4:10 pm

so long as its mounted on the inner part and doesn't touch the outer part it should be fine and is a common way to do it.

TVRleigh · Post by **TVRleigh** » Mon Apr 07, 2008 4:32 pm

Well,

I was hoping I coul just mount it on the outer part.

Post by **katanaman** » Mon Apr 07, 2008 6:40 pm

to be honest you would have a hell of a job attaching it to the outer ring anyway. It should bolt onto where you would bolt the pulleys onto. You can get an idea from here http://trigger-wheels.com/store/ in the fitting guide section.

Eliot · Post by **Eliot** » Mon Apr 07, 2008 7:46 pm

There's a long thread over at PH on the grif section about trigger wheels.

Is yours a serp?

CastleMGBV8 · Post by **CastleMGBV8** » Mon Apr 07, 2008 7:47 pm

Leigh.

Is it possible thsat you have the wrong size trigger wheel, Trigger Wheels have a Rover specific wheel with a pickup bracket that bolts onto the front cover.

Kevin.

TVRleigh · Post by **TVRleigh** » Mon Apr 21, 2008 4:21 pm

It's a late serp P38 engine.

There are no bolt on pulleys just the one serp that's separated from the main part from a rubber bit.

see
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=025

Spoken to trigger wheels, and they don't do one, nor does anyone else Ive spoken too.

The plan was to just have a small ring with the teeth and bolt this to the outer ring. as this would then add less weight.

I think I have solved it now, Ive just cut a hole big enough to fit over the bit that joins front cover., and used the threads for the removal tool to fix it in place. and used counter sunk bolts.

Will post a wednesday.

Post by **katanaman** » Mon Apr 21, 2008 5:52 pm

these engines should be triggered of the flywheel standard but you probably aren't using a standard flywheel. Couple of choices, at the back there will be a heavy boss. You could get one made as a press fit onto that, early engines have an oil deflector plate there. Another choice is get one made up that is trapped under the pulley bolt, mounted to the front. Both of them you can index off the bolt hole that is there.

TVRleigh · Post by **TVRleigh** » Wed May 07, 2008 3:39 pm

Ok got one cut and fitted.
Then trimmed on a lathe one fittled so it's all true, as was 1mm out from 1 side to the other.

Post by **katanaman** » Wed May 07, 2008 4:02 pm

fixed the pic links for you.

4.6 MGBegun · Post by **4.6 MGBegun** » Thu May 22, 2008 1:49 am

Did you have to re-balance the harmonic balancer after you mounted the trigger wheel, and if so how did you balance it?

Post by **katanaman** » Thu May 22, 2008 8:13 am

Technically yes you should do but if your engine isnt fully balanced anyway it will probably make little odds. Specialist equipment is needed so its not a DIY thing to do.

TVRleigh · Post by **TVRleigh** » Thu May 22, 2008 10:57 am

I had the whole lot professionly balanced. and weight matched to 0.2g

Crank
Flywheel
Clutch Cover
Rods
Pistons
and the Harmonic balancer.

had to supply the shells and rings and timing gear. to get everything done perfect.

The weight was taken off the front and a few holes was made in the back.

He also said it may be best to add another 2 bolts as with only 2 It was viberating a little on high rev's