[tjtjwdad]

Originally Posted by Dens71TA

My 09B of 1970 Norword built '71 T/A has the extra braided strap that goes to the shaker door. I'm pretty sure its the "thick" shaker but its been a while since I have looked at it closely since the car was stuck in paint shop purgatory for 3 years.

I added a small spring from the flapper door to the solenoid strap and that seem to fix the issue with the door not closing all the way.

Mine does have that strap. I'll checkout the spring setup you pointed out.

[70RAlll]

I thought the xtra ground strap went from the solenoids to the metal ring, not to the flap door?? Then the main ground to firewall too this ground to firewall. Discontinued due to being overkill. May be wrong, need to look up to be sure, but pretty sure I have this right.

And my now standard and apparently needed disclaimer:
"My opinion only. If this offends someone in any form at all, please accept my apology, was not meant this way"

[71HOT/A]

Mine has a braided ground that attaches to the door.

[transam1972]

keith if you took off the mislocated tab or tabs and located it to the correct position, use a dual snorkel air cleaner... you would have a functioning N.O.S. SR shaker...they are not worthless junk...I am putting one on my car and your comments are devaluing my car....joking of course

[Norwood]

Originally Posted by 70RAlll

I thought the xtra ground strap went from the solenoids to the metal ring, not to the flap door??

Bill, What do you mean by metal ring? I always thought that it went to the door but never understood why. But why else is would they put a male spade on the door? But if it goes to the door , what would it ground to, the door is isolated and has no contact with any metal surface other than the T bar, it really would serve no purpose. Pontiac engineers thought they needed it for a reason. The stupid things we need to know.

I have never used one on my shaker, I also have never hooked up the ground from the base to the firewall. I have never had one not function.

[transam1972]

has anyone ever seen the parts breakdown of the shaker where they show a ground clip mounting thru the bolt of the front passenger side carburetor hold down bolt?...does anyone have this?

[Norwood]

nope....but its #36

[70RAlll]

Originally Posted by Norwood

Bill, What do you mean by metal ring? I always thought that it went to the door but never understood why. But why else is would they put a male spade on the door? But if it goes to the door , what would it ground to, the door is isolated and has no contact with any metal surface other than the T bar, it really would serve no purpose. Pontiac engineers thought they needed it for a reason. The stupid things we need to know.

I have never used one on my shaker, I also have never hooked up the ground from the base to the firewall. I have never had one not function.

I was wrong. It is clear in the 1970 assembly manual shows that extra ground with one mount to the bracket that holds the solenoids and it states " to valve" .. later pic's name the door "valve" .. so I was wrong..

[70RAlll]

Originally Posted by transam1972

has anyone ever seen the parts breakdown of the shaker where they show a ground clip mounting thru the bolt of the front passenger side carburetor hold down bolt?...does anyone have this?

I have seen that clip on every original 1970 and 1971 TA that I have looked at. Sort of duplicates the grounds we are all discussing.The ground strap from the base to the firewall and this clip both will ground the solenoids, as will the extra ground inside the scoop this thread was discussing.. Seems overkill to me.. But yes, originals have that clip. It will mess up your nice and pretty restored shaker base's black paint pretty quick..lol..

[Norwood]

OK so what would the purpose be? Anyone of the smart guys here have a theory. What would the purpose be of grounding the door? The solinoids need a ground of course but they arn't getting it from the door.

Where dose that ground from the carb bolt to the base attatch to?

[transam1972]

my guess is that clip looks a bit like the ground clip mounted in front of the windshield...since 70 and 71 had the crazy switch set up...ground overkill?...72 is nice and neat...just a ground from the shaker to the firewall...everyone forgets to disconnect from the firewall clip and the ground takes a beating...the same ground is also used for the engine block to firewall...on 72 anyway

[blue71ta]

Originally Posted by transam1972

my guess is that clip looks a bit like the ground clip mounted in front of the windshield...

correct, it looks very similar, if not the same, as that one. It attaches to the front, passenger side carb bolt (on top of the carb) and grounds to the bottom, metal plate on the shaker - see pic. Similar to Craig's pic, but a little easier to see.

I have also attached pics of an original '70 shaker with the ground strap to the flapper door.

[Norwood]

Great Pics James, But what could that ground strap do? Why would the door need to be grounded? This is 70-71 only?

[blue71ta]

Originally Posted by Norwood

Great Pics James, But what could that ground strap do? Why would the door need to be grounded? This is 70-71 only?

good question. I don't know why it would be there either, but there must have been a reason if the GM engineers put it there. I never knew that existed until Dennis mentioned it earlier in this thread, so I had to check my shakers & sure enough, there it was. Now it makes sense why that tab is on the flapper door...

Seems to me that it is in the way of the door operating smoothly, though, and likely why it was usually tossed. I'm guessing that the 70 and early 71 shakers had it, but maybe it was deleted when they realized it wasn't necessary? Only speculating though.

[transam1972]

Wow!..great pic Blue71ta..you always shine!..now I finally know why the shaker has that funky tab!..never understood until now! thanks...I am guessing but it is just extra grounding for the solonoids...much grounding(3) going on with 70 & 71 shakers...they probably wanted to be certain that the whole mess was grounded,right back to the firewall

[blue71ta]

Originally Posted by transam1972

Wow!..great pic Blue71ta..you always shine!..now I finally know why the shaker has that funky tab!..never understood until now! thanks...I am guessing but it is just extra grounding for the solonoids...much grounding(3) going on with 70 & 71 shakers

you're welcome. You can thank Dens71ta as well.

[transam1972]

thanks Dens71ta...did not mean to slight you..a blanket thankyou to all..I am into this thread though...all we need now is a photo of that carburetor bolt ground clip..my 72 assembly manual makes a point of showing a view A detail drawing...it is a different part# than the front of windshield ground clip..I need to hear from 72 owners if this is but yet another piece I am missing

[71HOT/A]

The hood and metal scoop door were grounded to reduce radio noise.

[70RAlll]

Originally Posted by transam1972

my guess is that clip looks a bit like the ground clip mounted in front of the windshield...since 70 and 71 had the crazy switch set up...ground overkill?...72 is nice and neat...just a ground from the shaker to the firewall...everyone forgets to disconnect from the firewall clip and the ground takes a beating...the same ground is also used for the engine block to firewall...on 72 anyway

Here is the carb ground clip.This is from an 18k mile survivor RAIV, so I know it is original. Hope this helps... GM sells a clip that is exactly the same dimensions as this one. Have used it on a few restos I have helped on.. Don't have the time right now to locate the part number, but have 2-3 in the shop. when I get a chance will get the number and post it..

[70RAlll]

And yes, the intake from this picture is painted on this RAIV. the owner was embarrassed he only had a 400 ci engine and when 71 HO's came out he painted the engine(without removing it) 71 HO blue and put 455 callouts on the scoop.. funny story.. so those sharp eyed enough to catch this, yes it is a IV, just a story of a IV,