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Cardinal Grammeter

Member Since 18 Mar 2014
Offline Last Active Mar 21 2018 06:45 AM

Posts I've Made

In Topic: 1974 620 Ultra Quiet Exhaust: Adapt 720? or?

07 January 2018 - 05:41 PM

Does anyone have copies of the Walker parts book picture of the 620 exhaust components?

In Topic: 1974 620 Ultra Quiet Exhaust: Adapt 720? or?

17 December 2017 - 06:29 PM

Thanks for the tips.


FYI, the exhaust on the truck is just fine as far as quiet goes - and that is with a rotted off tailpipe.  My Suzuki Swift references are probably not completely comparable since that system has a mid-resonator and a muffler at he very end (no tailpipe.)


RE:  Large Case Mufflers:


Another thing I learned about mufflers from my 1989 LS1 Z28 which had a long tube header system made by a company I can't remember, 3 initials, Txx, and not TSP which is Texas - I think this outfit had a misleading name like "turbo marine" or something - they had the first 1/2in flange long tubes you could buy for the LS1.  But the crux was that when they designed the system, they discovered mufflers with a small case did not have strong resonances  - an example of the worst muffler you could choose would be a Walker school bus muffler.  Does anyone remember "racking off?"  Some loved it, but it was really the worst possible exhaust sound out there.


So a large case muffler might be problematic, however, the current muffler on my 74 is a big round one (no dimensions at this time.)


I do like the idea of getting Honda pieces - or even S10 or Ranger mufflers.  But it might be best to find a muffler from something with 70 hp instead of over 100hp.


Off to check out that 521 thread...  wow, lots of nice work!  The exhaust crosses over to the RHS?  Is the 521 tank on the RHS like the 620?

In Topic: How I replaced a 521 exhaust system

17 December 2017 - 06:02 AM



Damn PhotoBucket all to Hell!


It sickens me that all hosted pics will eventually disappear....


You'd think Google would be chomping at he bit to host all pics in the known & unknown multiverses forever...

In Topic: 74 620 Throttle Cable wore thru sheath - Options?

18 October 2017 - 01:26 AM

LOTS of tubes about shortening cables.


LSS they replace the crimped end with a drilled and soldered joint.  No Likey...

In Topic: 74 620 Throttle Cable wore thru sheath - Options?

17 October 2017 - 06:43 AM

Mine has the threaded sheath end w/nut for the bracket on the EGR sub-manifold @ the carb.


Since that EGR is unique to the 74, I'm guessing the cable bracket is correct.


There was a guy selling a NOS one on eBay - the early part number for a big $35.


IDEA:  Make a cable loop @ pedal end (1-2 turns) and secure loop with small plastic tie.  It wouldn't damage the cable like a knot would.  Could even use a 1/8" length of brake line tubing to wind cable on, then tie through tubing.  That way no tie stress from cable tension.