ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1964 1/2 - 1965 => Topic started by: must69 on March 26, 2018, 03:40:47 PM
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I have seen diagrams of 260 engine exhaust with and without resonator. Which is correct?
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I have seen diagrams of 260 engine exhaust with and without resonator.
Where did you see these variations? The 64 1/2 - 65 Mustang Chassis Assembly Manual shows a resonator, 5212, and a transverse muffler, 5230. So does the 75 MPC for service.
Jim
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I don’t recall specifically, but have seen diagrams at various places.
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Jim, any suggestions for a source for a replacement system with resonator?
Thanks. Phil
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Resonators on single exhaust didnt start until November of 64
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That might explain why I have seen it both ways.
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Resonators on single exhaust didnt start until November of 64
That would be a 65 model Mustang. A resonator is shown as being used on 64 1/2 Mustangs in the Chassis Assembly Manual. No engine or dates are given. The 75 MPC also, by implication, show a 260 being replaced with a resonator. This may be "universal" replacement.
Jim
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Jim, any suggestions for a source for a replacement system with resonator?
Thanks. Phil
Either National Parts Depot or Virginia Classic Mustang would be good sources. They both have members on this forum.
Jim
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64.5-65 single exhaust Mustangs did not come from the factory equipped with a resonator until mid November 64.
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64.5-65 single exhaust Mustangs did not come from the factory equipped with a resonator until mid November 65.
Being that 65 production began in August 1964 (the 17th is supposed to be the day), a November 65 date would be well past any 64 1/2 designated Mustangs, so there would be no resonators used in any 260 or 289 "D" code cars. Just checking.
Jim
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I'm guessing Mike meant Nov '64.
The later parts books would have superseded part numbers for early exhaust systems. The single exhaust resonator systems were probably considered 'an improvement', so the old numbers/config were dropped.
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I'm guessing Mike meant Nov '64.
Your date would mean that NO 64 1/2 Mustangs with a 260 or 289 "D" code had a resonator.
Come on guys. No more speculation. FACTS.
Jim
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Your date would mean that NO 64 1/2 Mustangs with a 260 or 289 "D" code had a resonator.
Come on guys. No more speculation. FACTS.
Jim
That's exactly right, no resonators used on any single exhaust systems until Nov '64, which includes 64.5 D, F and U codes.
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That's exactly right, no resonators used on any single exhaust systems until Nov '64, which includes 64.5 D, F and U codes.
For the record, got a source?
Jim
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For the record, got a source?
Jim
Mike's 4,500 mile Unrestored August '64 car with original exhaust, no resonator. I believe he had found some other examples over the years.
Looking at the '65 single year MPC, there's a symbol designation for 'Includes Resonator'. In the extension pipe chart section, the only C5ZZ number with the symbol is dual exhaust.
The '65 parts book and '66 one show different numbers for V8 single exhaust.
Before 4/6/64 - C5ZZ-5A212-A
From 4/6/64-6/5/64 - C5ZZ-5A212-C
From 6/5/64 - C5ZZ-5A212-F
Inlet pipe (C5ZZ-5246-B) and muffler(C5ZZ-5230-B) are all the same for those 3 extension pipe applications.
'66:
C5ZZ-5A212-G (this is what is listed in the '75 MPC)
C6ZZ-5A212-A
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Excellent. Thanks.
Jim
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Thanks for the info. I am restoring a mid July 31,000 mile coupe that did not have a resonator on it either. Just wanted some verification on it.
Phil
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I believe there was also a TSB published that gave the start date for the resonators.
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For the record, got a source?
Jim
Jim : I have a source/ documentation, which does not agree with the Nov 64 date mentioned.
While we all know that there are things in MPC's aren't always true, usually, when dates are given, particularly to the day, there was something to back this up.
That being said, the "date" appears to be 10/15/64, according to the 1960-68 MPC, this particular page being dated "June 1968".
Bob
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Thanks, knew we had seen the date somewhere.
In reference to 'Nov '64', that was more of a buffer as we know the actual changeover dates on the assembly line don't always map exactly to the MPC.
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And this change over date holds true for all plants?? not trying to spice things up.. ;D
My June 64', Dearborn built coupe, didn't have a resonator and the exhaust "looked" original, (although the PO did use some heavy duty wire to hold up the pass. side of the muffler since the muffler strap broke. :o
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Jim : I have a source/ documentation, which does not agree with the Nov 64 date mentioned.
While we all know that there are things in MPC's aren't always true, usually, when dates are given, particularly to the day, there was something to back this up.
That being said, the "date" appears to be 10/15/64, according to the 1960-68 MPC, this particular page being dated "June 1968".
Bob
Oops - your "date" applied to HP engines only. There is no date indicated for 260/289. There is even a "difference" between the 260 and 289 listing, 289 included resonator.
My interest in this comes from a car show pre-judging meeting I attended where the 64 1/2-66 team leader reviewed what we should be looking for. That was over 20 years ago. He wanted to make sure that all cars were judged to the same standards. The big issue was that if you found a discrepancy on the second car you judged, you had to ignore it if you did not inspect that item for judging that same item on the first car. It's called consistency. Each area was discussed, engine compartment, interior, trunk, body and undercarriage. I remember the exhaust (undercarriage) standards discussion. It included resonators, omitted on 6 cylinder engines, required on 8 cylinder engines, a general statement. You'll never guess who carried the sheet of cardboard to facilitate sliding under cars for undercarriage judging (I'm 6 ft tall, 240 pounds).
Jim
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Jim : You are of course correct. No dates for non-HP 260 or 289's. In looking at the "1965 Only" MPC, it only appears to confuse matters even more. And again, gives other dates, but not in regard to resonators ; only in regard to Aluminized Steel for the non- HP 260 and 289's.
Bob
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64.5-65 single exhaust Mustangs did not come from the factory equipped with a resonator until mid November 64.
I believe there was also a TSB published that gave the start date for the resonators.
TSB article #353
Basically states - 289 4v single exhaust has high back pressure and noise levels. This was corrected in production on 10/15/64 by replacing the inlet pipe with a resonator and extension pipe.
Again we can't be certain that all plants changed over at exactly the same day but then again we can't be certain when 65's were actually built anyway ;)
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TSB #353
Basically states - 289 4v single exhaust has high back pressure and noise levels. This was corrected in production on 10/15/64 by replacing the inlet pipe with a resonator and extension pipe.
Again we can't be certain that all plants changed over at exactly the same day but then again we can't be certain when 65's were actually built anyway ;)
Indeed. I have it on good authority that some 65's were built in 1964.5. *G*
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TSB #353
Basically states - 289 4v single exhaust has high back pressure and noise levels. This was corrected in production on 10/15/64 by replacing the inlet pipe with a resonator and extension pipe.
Again we can't be certain that all plants changed over at exactly the same day but then again we can't be certain when 65's were actually built anyway ;)
Jeff : Thanks for coming in on this. T apparently missed mgmradio's Reply, and didn't think to check my TSB's.
Bob