Sluggish new Rev Counter/Tachometer

Andre · Post by **Andre** » Fri Sep 08, 2006 8:03 pm

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

1972_911t · Post by **1972_911t** » Fri Sep 08, 2006 11:02 pm

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

davidppp · Post by **davidppp** » Sat Sep 09, 2006 8:56 am

Who did the refurb?

Its possible a mistake was made with the dampiing..

Kind regards
David

Andre · Post by **Andre** » Sat Sep 09, 2006 7:28 pm

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

silver7 · Post by **silver7** » Mon Sep 11, 2006 3:31 pm

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

ideas appreciated

Barry · Post by **Barry** » Mon Sep 11, 2006 3:35 pm

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

.

steve wright · Post by **steve wright** » Thu Sep 14, 2006 4:36 pm

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

Barry · Post by **Barry** » Thu Sep 14, 2006 5:46 pm

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

.

Andre · Post by **Andre** » Thu Sep 14, 2006 7:17 pm

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?

steve wright · Post by **steve wright** » Fri Sep 15, 2006 8:50 am

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

Robster · Post by **Robster** » Fri Sep 15, 2006 12:27 pm

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

steve wright · Post by **steve wright** » Fri Sep 15, 2006 12:43 pm

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.

onespeed · Post by **onespeed** » Mon Sep 18, 2006 8:48 am

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

Andre · Post by **Andre** » Mon Sep 18, 2006 9:00 am

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....

steve wright · Post by **steve wright** » Mon Sep 18, 2006 11:06 am

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