Has anyone ever noticed that the engine ID on Wallace racing PHS and firstgeneration are all conflicting
WALLACE CODES: 1968 DISP CODES 350 265 HP WD,WC,YN,YJ 350 320 HP WR,WK,YP,YM 400 265 HP XM,YA 400 290 HP WA,WB,YC 400 330 HP YT,YW 400 335 HP WQ,WZ,WI,XN 400 340 HP WU,XT 400 350 HP XZ,XH,YS,YZ 400 360 HP WT,WS,XS,XP 400 366 HP WY,XW 428 375 HP WG,YH 428 390 HP WJ,YK
FIRSTGEN CODES: 1968 CODES DISP HP CR TRAN CARB QTY BUILT WC 8 350 265 9.2:1 Man. 2 BC Firebird 350 1850 WK 8 350 320 10.5:1 Man. 4 BC Firebird 350 H.O. 3784 WI 8 400 335 10.75:1 Man. 4 BC Firebird 400 Ram Air I 321 WQ 8 400 335 10.75:1 Man. 4 BC Firebird 400 H.O. 1415 WU 8 400 340 10.75:1 Man. 4 BC Firebird 400 Ram Air II 98 WZ* 8 400 330 10.75:1 Man. 4 BC Firebird 400 7563 XN 8 400 335 10.75:1 Auto. 4 BC Firebird 400 Ram Air I 92 XT 8 400 340 10.75:1 Auto. 4 BC Firebird 400 Ram Air II 12 YJ 8 350 265 9.2:1 Auto. 2 BC Firebird 350 50006 YM 8 350 320 10.5:1 Auto. 4 BC Firebird 350 H.O. 2638 YT 8 400 330 10.75:1 Auto. 4 BC Firebird 400 11151 YW* 8 400 335 10.75:1 Auto. 4 BC Firebird 400 H.O. 684 ZD 6 250 215 10.5:1 Man. 4 BC Firebird Sprint 5609 (1) ZE 6 250 215 10.5:1 Auto. 4 BC Firebird Sprint 1850 (1) ZK 6 250 175 9.0:1 Man. 1 BC Firebird Standard 13586 (1) ZN 6 250 175 9.0:1 Auto. 1 BC Firebird Standard 50549 (1) (1) Includes Tempest production (*) Conflicting information for these codes.
PHS CODES: 1968 HP DISP TRANS BLOCK CR 265 350 M WC 9.2 256 350 A YJ 9.2 320 350 M WK 10.5 320 350 A YM 10.5 330 400 M WZ 10.75:1 330 400 A YT 10.75:1 335 400 M WQ 10.75:1 335 400 A YW 10.75:1 335 400 M WI 10.75:1 335 400 A XN 10.75:1 340 400 M WU 10.75:1 340 400 A XT 10.75:1
I am also still unsure as to the conflicting information for the WZ & YW codes.. Wallace has the WZ as 335hp HO and YW as 330hp standard which is opposite to the PHS and FIRSTGEN.
yah there is a few typos here and there but its still A GREAT WEBSITE for 99% I use it weekly it seems and real greatfull for the effort to put it together ,,,
Do you know who is wrong ? would you happen to know what the conflicting information for the WZ and YW on Wallace they have WZ as a 335hp HO and YW as a standard 330hp PHS has YW as 335 hp HO and the ID chart on firstgen shows conflicting information for the two codes any deas?
I am no pillar of memory these days but have a library of books from back in the day and the stuff that I trust shows WQ AND YW as the HO motors. Here is a list that references some of the books that I have https://www.facebook.com/groups/161277239570/permalink/10159091912669571 If your just getting into Birds you need this book https://www.pontiacv8.com/shop/the-definitive-firebird-tans-am-guide-1967-1969 It has all the codes and tons of info on our first gens. I have read this through a few times and I could only find a few small unimportant errors, It's a good reliable source by a fellow Pontiac enthusiast.
I was looking through Wallace trying to find any info about the conflicting information for the codes WZ & YW that are noted on the Firstgen site when I noticed the errors looks like Wallace has a few mistakes I did send an Email to Wallace but no reply as of yet.
I 100% agree with barnbird. Also, I have a 400 HO with a YW engine (and from the factory it has the long branch manifolds to help with the horsepower) that is numbers matching to confirm this data.
Last edited by Tom68Firebird; 05/22/2109:51 AM.
1968 Pontiac Firebird 400 Convertible - April Gold/Deluxe Black Automatic 1968 Pontiac Firebird 400 Coupe - Aegena Blue/Standard Teal 4 speed 1968 Pontiac Firebird 400 H.O. Convertible - Alpine Blue/Deluxe Teal Automatic 1968 Pontiac Firebird 400 Coupe - Autumn Bronze/Deluxe White 4 speed
