Tach filter for HEI connection - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tuff Gong · 12-10-2019, 07:47 PM

Anybody buy and use one of these. If so please send a link. Thank you.

Stock gauges to HEI. 350 motor 1970

**LockDoc** · 12-10-2019, 10:01 PM

Quote:

Originally Posted by Tuff Gong

Anybody buy and use one of these. If so please send a link. Thank you.

Stock gauges to HEI. 350 motor 1970

I have never used a stock tach and HEI distributor and needed a filter. Do you have an original tach or a repro one. Have you had it all installed to see if it actually works or not? I haven't been following all of your posts so not sure. I have read about guys having problems and some of them have been caused by aftermarket ignition modules in the distributor or bad grounds.

LockDoc

gchidest · 12-10-2019, 10:45 PM

Been searching on the best option also to put in a reproduction tach or a aftermarket tach that will fit in the space where original tach would go. Looks like a lot of people have had luck with reproduction tachs and hei.

http://67-72chevytrucks.com/vboard/s...d.php?t=698237

Tuff Gong · 12-10-2019, 11:31 PM

Tach is original. I just want to do it right the first time around. Maybe it’s not needed? Or if it’s an issue I will just deal with it down the road.

Andy4639 · 12-11-2019, 12:28 AM

I have 3 trucks all of them are tack cluster and HEI with no problems.

**StingRay** · 12-11-2019, 11:29 AM

I've never needed anything but to hook it straight up. Run em for over 20 years like that.

Happy_dan · 12-11-2019, 11:54 AM

I have only heard that with the Petronix III ignitor module that the tach won't work.

**TBONE1964** · 12-11-2019, 08:37 PM

Quote:

Originally Posted by Tuff Gong

Tach is original. I just want to do it right the first time around. Maybe it’s not needed? Or if it’s an issue I will just deal with it down the road.

Hi Brian,

Normally not needed and the tach should work just fine for you.

For what it is worth, I would be curious to see exactly what a filter does for you. All they are really for is to clean the signal line. It prevents electrical interference from other nearby wiring.

The filter will not fix a tach that does not read correctly.

Hope this helps.

Tuff Gong · 12-11-2019, 09:59 PM

Thanks for all the feedback. I’m installing without a filter.

12-10-2019, 07:47 PM	#1
Tuff Gong Registered User Join Date: Jan 2011 Location: Glendale, AZ Posts: 3,178	Tach filter for HEI connection Anybody buy and use one of these. If so please send a link. Thank you. Stock gauges to HEI. 350 motor 1970

12-10-2019, 10:45 PM	#3
gchidest Registered User Join Date: Oct 2019 Location: Winter Haven, FL Posts: 6	Re: Tach filter for HEI connection Been searching on the best option also to put in a reproduction tach or a aftermarket tach that will fit in the space where original tach would go. Looks like a lot of people have had luck with reproduction tachs and hei. http://67-72chevytrucks.com/vboard/s...d.php?t=698237

12-10-2019, 11:31 PM	#4
Tuff Gong Registered User Join Date: Jan 2011 Location: Glendale, AZ Posts: 3,178	Re: Tach filter for HEI connection Tach is original. I just want to do it right the first time around. Maybe it’s not needed? Or if it’s an issue I will just deal with it down the road.

12-11-2019, 12:28 AM	#5
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Tach filter for HEI connection I have 3 trucks all of them are tack cluster and HEI with no problems. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

12-11-2019, 11:29 AM	#6
StingRay Senior Member Join Date: Mar 2000 Location: Saskatoon,SK,Canada Posts: 2,476	Re: Tach filter for HEI connection I've never needed anything but to hook it straight up. Run em for over 20 years like that. __________________ Saskatoon, Saskatchewan Canada

12-11-2019, 11:54 AM	#7
Happy_dan Registered User Join Date: Jul 2019 Location: New Boston, NH Posts: 456	Re: Tach filter for HEI connection I have only heard that with the Petronix III ignitor module that the tach won't work.

12-11-2019, 09:59 PM	#9
Tuff Gong Registered User Join Date: Jan 2011 Location: Glendale, AZ Posts: 3,178	Re: Tach filter for HEI connection Thanks for all the feedback. I’m installing without a filter.



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