Tach Filter

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Apr 19, 2005 | 10:47 AM

dmrodco

Thread Starter

Drifting

Joined: Dec 2002

Posts: 1,887

Likes: 1

From: Hill AFB area Utah

Tach Filter

Ok so I have a 74 with the mechanical tach do they still use the tach filter ?? Its listed in the parts catalogue as useable on 74 thru 82 cars. is it a pwr filter ? I thought the mechanical tach was just that all mechanical..... Help please !

Apr 19, 2005 | 10:54 AM

bobs77vet

Race Director

Joined: Sep 2004

Posts: 11,874

Likes: 263

From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod

Quote:

Originally Posted by dmrodco

the tach filter is an electrical filter for HEI dist. and elecrtric tachs not for mechanical ones

Apr 19, 2005 | 11:36 AM

Maymyvetteliveforevr

Safety Car

Joined: Mar 2005

Posts: 4,255

Likes: 82

From: Brampton Ont.

bobs77vet, I saw a post in the corvette faq. section that explained how to make your own tach filter, but unfortunately it showed up error each time. Has anyone had any luck on that post or tried to make there own?

Apr 19, 2005 | 11:48 AM

kidneyboy

Melting Slicks

Joined: Aug 2004

Posts: 2,704

Likes: 6

From: Toronto

Quote:

Originally Posted by Maymyvetteliveforevr

If it's the post I'm thining of I used to make my filter and it was all good.

Apr 19, 2005 | 12:16 PM

Mike Mercury

Team Owner

Joined: Apr 2001

Posts: 54,204

Likes: 180

From: S.W. Ohio. . . . . . NRA Life Member

I had just posted a schematic of the filter. "Search" won't find it though

Last edited by Mike Mercury; Apr 19, 2005 at 12:18 PM.

Apr 19, 2005 | 12:32 PM

danno12345

Racer

Joined: Feb 2005

Posts: 258

Likes: 2

From: Boise ID

Here's the thread with your schematic, Mike.

http://forums.corvetteforum.com/show...ter&forum_id=3

Or here's the pic:

So we've got:

10 K Ohm Resistor
5.6 K Ohm Resistor
100 pF capacitor
.10 MFD <---- ??Wuzzat??

Thanks!
Dan

Apr 19, 2005 | 01:52 PM

bobs77vet

Race Director

Joined: Sep 2004

Posts: 11,874

Likes: 263

From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod

if some bodiy makes two i'll take the extra one, and pay for both.

Apr 19, 2005 | 03:26 PM

Wrecked82

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Quote:

Originally Posted by danno12345

MFD <---- ??Wuzzat??

You mean you don't know what MFD means?

Miller Fine Draft.

None of the schematic makes sense to me.

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Apr 19, 2005 | 04:12 PM

Mike Mercury

Team Owner

Joined: Apr 2001

Posts: 54,204

Likes: 180

From: S.W. Ohio. . . . . . NRA Life Member

I make these up for 1968-1974 electronic tachometer conversions. The parts cost is low, but the time to assemble, test, and package is where the bulk of the price comes from.

email me if interested.

tim-yvonne@juno.com

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