Author Topic: SHAZZBOTT a 1935 chevrolet standard roadster  (Read 18304 times)

madmike3434

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Re: SHAZZBOTT a 1935 chevrolet standard roadster
« Reply #105 on: June 03, 2019, 07:43:15 PM »
here is some more carb stuff.

Because the weber carbs do not have provision for a PCV valve nor a road draft tube I had to conjure up a breather system.  I spotted these little air filters on ebay from hong kong and came up with the idea of 4 of them across the front to take engine pressures off, no venting system your going to blow valve stem seals.

My Larson valve covers now have a AN-12 90 degree fitting that feeds up to the front thru that same black cloth hose.  I originally got the idea after seeing a Chevrolet big block can-am engine with 2 push on filters across the front.

just spent Saturday with my eastwood 200 ac/dc TIG welder, putting it all together and then high speed die grinder to shape the 4 tubes.  Almost ready to go to powder coater and be done in flat black

mike lynch
« Last Edit: June 04, 2019, 10:29:24 AM by madmike3434 »

madmike3434

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  • Location: whitby ontario Canada
Re: SHAZZBOTT a 1935 chevrolet standard roadster
« Reply #106 on: June 07, 2019, 09:55:03 PM »
nothing like trying to tap aluminum with 1/2" pipe tap even with correct aluminum liquid to tap and then not having the absolute correct drill size of 23/32, alternate is 3/4 but its too small.  So off to ebay to hunt one down , just in case I have to tap 1/2" pipe again.

mike

madmike3434

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Re: SHAZZBOTT a 1935 chevrolet standard roadster
« Reply #107 on: June 13, 2019, 12:45:39 PM »
further to tapping aluminum.   I found that altho one site said use a 23/34 drill to tap a 1/2" pipe thread I found another site that says use 45/64.  Interesting doing the subtraction, the 45/64 would be 1/64th smaller that the 23/32.    The alternate drill to use according to my printed sheet is 3/4".

So after my head stops spinning with all these fractions I decide I need to have a longer approach tube by 5".  So off to metal mart and luckily find a piece of 1/4" wall aluminum tube that the 1/2" pipe barely fits into.

Great now to use the 3/4" drill bit open the hole for tapping.  Install 1/2"pipe tap into holder,  slop liquid aluminum tap fluid all over it . LET THE FIGHT BEGIN, can go so far and just will not tap any deeper.  I get 1/2 way into hole and said has to , supposed to be easier than this.  1/4 turn blow chips off, more fluid and other 1/4 turn and on and on.  At this point something gonna get hurt. 

I take the 1/2" pipe tap and lay the 3/4" drill on it, then take the 13/16" drill on it, hey wait a minute here, this can work.  I load the 13/16 drill into a 1/2" electric hammer drill , mark 1/2 " up the drill bit with tape so only go so far.

Put the pipe tap back into the hole and go at it, hey this is working and putting out about 25% of the effort of before.  End result, the  1/2" pipe thread An12 fitting go into the hole at 90% of the thread inside which is what I am after.

Satisfied everything worked out fine, I do the other one.  All is peaceful now in Whitby

Sure I can find other stuff to drive me crazy.......LMAO
........madmike3434

 


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