DDK - Die Deutschen Klassiker

Just fitted a new (refurbished) 10K Rev Counter to my '72 911 2.7RS Spec Car. It seems very sluggish, ie I rev the engine and the Tach takes a moment to catch up to where the engine is. Its accurate if I hold the throttle at whatever revs. The old tach and the tach on my 3.2 Carrera have no delay at all.

Any ideas??

Thanks

I may be wrong here but arnt later gauges dampend to stop them bouncing around eratically? this may account for it seeming somewhat sluggish compared to what your used to.

Just a thought

Steve

Who did the refurb?

Its possible a mistake was made with the dampiing..

Kind regards
David

Steve, David

Thanks for your thoughts, I got the tach here on DDK, will ask who did the refurb.

There must be a problem somewhere as the tach is definately much slower to react than the original.

If anyone else has any suggestions.....

Thanks

sorry to highjack the thread - who is the best person to sort a rev counter which bounces for a 72?

ideas appreciated

Very quickly (and not wanting to do a hyjack ) often bouncing tacho's are because of points prolems: dwell, poor contact and poor connectors/connections are all worth looking at: esp. if you've been doing any engine work.

This concludes thread hyjack .

i changed to MSD (no points) and the rev counter became a lot more crisp. As a side effect it also started better, idled like a turbine and now revs like a banshee saw

I love MSD: the E will get it as a matter of course, like you Steve, I'll put a duff CDI box in for cosmetics.

Damn I've done it again: hyjack really, really over this time .

The problem was not apparent with the previous rev counter. The 10K Tach was rebuilt by North Hollywood Speedometers, think I may send them an email and see what they come up with.

Steve, which MSD have you got fitted?

the 6AL unit plus the contact breakerless unit (can't remember it's name), as well as their coil. it comes with 3 rev limiter chips (5, 6 & 7000rpm I think, but you can buy 200rpm increments very cheaply). i just figured it was better to replace the whole lot on a newly rebuilt engine. I had it mounted under the passenger seat to retain an original look. cheer, Steve

Hi Steve,

could you say where your got your MSD set up from, I can't seem to find a seller in the uk.

kind regards
Robster

sure, it was fetuhoe on ddk. he runs stourbridge motorsport. the msd website is worth a lookv too, as is pelican, to get a sense of what's what.

steve,
did thet install/set up the MSD for you too? looks like being beyond my limited skills.
thanks
andy

And whilst we are on the subject, can anyone recommend a pointless system, the Pertronix Ignitor, is the only one that seems to get a mention....

hi guys. Autofarm (Nick Fulljames) did the set up/instal. MSD also supplied the pointless system (effectively a collar around the dizzy shaft and a hall-effect monitor that goes where one set of points would've been. cheers, Steve