TR coded 455 in 71 Riv

Discussion in 'The Bench' started by 8587GN, Mar 23, 2004.

  1. 8587GN

    8587GN Well-Known Member

    Is this common? I found it in a junk yard in AZ last week.Car is a 71 Riv,no GS emblems,but had a TR code on the block
     
    8587GN, Mar 23, 2004
    #1
  2. Doo Wop

    Doo Wop Where were you in '62?

    TR is correct for a 71 Riv. A 71 GS Riv would be coded TA.

    HTH
     
    Doo Wop, Mar 23, 2004
    #2
  3. Dan Healey

    Dan Healey Well-Known Member

    Korrie

    IF the Riv got a stage 1 in 71, it would have a TS code then, right?:Do No:

    Just wondering...but I think I have heard that before.:confused:
     
    Dan Healey, Mar 24, 2004
    #3
  4. Doo Wop

    Doo Wop Where were you in '62?

    Re: Korrie

    71 Rivs came with two codes only. TA & TR.

    TA is rated 25 more hp than TR. 335 vs 310.

    TS (GS Stage 1 only) was rated at 345 hp.

    Safe to say (IMHO) the Riv TA motor is a Stage 1 or at least had Stage 1 heads.

    Time for a Riv guy to chime in here and give us the lowdown.
     
    Doo Wop, Mar 24, 2004
    #4
  5. 72Rivguy

    72Rivguy Carl, Buicks Are the Best

    71-72 Riviera's with the GS package used a 455 with bigger valves and a hotter cam than a standard 455, but not as hot as a GS Stage 1 455. They also came with 3.42 positraction. The factory pics show a 71 Riviera GS air cleaner has a slightly bigger air cleaner snorkel.
     
    72Rivguy, Mar 24, 2004
    #5
  6. Dan Healey

    Dan Healey Well-Known Member

    I thought I heard some TS blocks in Riv's?

    Rumor, fact, or fiction?:Do No: Or maybe it was a bigger car?
     
    Dan Healey, Mar 24, 2004
    #6

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