Question about#13 heads - Pontiac GTO Forum
Aug 28, 2018 · Pontiac only used 1 block size having different bores, strokes, and main bearing sizes - no big block or small block like other brands. The block/head bolt pattern is the same from 1955-1981, so you could bolt any year head on any year engine, but it does not mean that they will work on any year engine.
Crankshafts for Pontiac 400 history? - Pontiac GTO Forum
Apr 27, 2019 · So may be another Pontiac arm chair myth. Most all Pontiac cranks are cast. Forged are found in the the early Pontiac's of 1955- 58, Super Duty engines, and Ram Air V. Forged cranks are also heavier than cast. Armasteel cranks are said to be the better cranks for high HP drag engines. Found in the 1964-1966 389 engines.
Stroker Owners Report - Pontiac GTO Forum
Jul 10, 2022 · 9 Heads (Make & Model) OEM Pontiac "670" castings fully ported and air flow balanced. Heat riser bowls blocked. 10 Head Valve Size (Intake & Exhaust) - 2.11" intake, 1.77" + .100" longer stems. exhaust w/hard inserts for unleaded gas conversion and bronze guides. Stud upgrade for roller rockers, fully thermal barrier coated by CALICO COATINGS.
#16 heads - Pontiac GTO Forum
Oct 20, 2009 · Pontiac iron head chambers were always beautiful but as-cast ports sucked. I've seen some really pretty and very well ported iron heads on the Westech flowbench only flow 230 at .500 lift. That same head with small 1.96/1.66 valves will have lower flow numbers than the larger valve head at higher lifts.
OPTION CODE LIST? - Pontiac GTO Forum
Apr 10, 2021 · PONTIAC A-BODY ACCESSORY CODES 1964-67 These codes are on the bottom of the trim. data tag found on the fire wall. They primarily identify equipment or options installed. Some codes only ID option and not specific equipment. These codes are made up of a number (Excl #1) and are followed by one or more letters. The number in front identifies group.
Manual and LS Swap Solstice Project | Pontiac Solstice Forum
LSR Region Solo Series 2023 Runner-up. DET Region 2019 ASP Champion 2020, 2021 CAM-S Champion NWOR Region I used to win XS-B on AD08's while 750lbs overweight just to stick it to the Miatas, now I just pester the GM team
Need camshaft advice for 428! - Pontiac GTO Forum
Jul 13, 2018 · I have a Pontiac Firebird -71 with a Pontiac 428 YH -68 with a TH400.-----Engine specs:.030 overbored 428 YH -68 (433Ci?) 375hp (stock) Pontiac #13 heads Forged piston 2282P Holley Street Dominator intakemanifold Holley 750cfm, 0-4779C carb. COMP Cams XE268H camshaft Ohio Crankshaft Hedman Hedders 28150, ceramic coated 2,5" exhaust
Hardtops? What Hardtops are available on aftermarket? | Pontiac ...
Jun 10, 2023 · A forum community dedicated to Pontiac Solstice owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, trade parts, and more! Show Less
Decoding VIN tags and Build plates | Pontiac GTO Forum
Jul 21, 2011 · 2 - Pontiac is make 42 - GTO is model 67 - 2 door convertible is body type 8 - 1968 is year built P - Pontiac, MI is plant where built 296731 - sequence number So the only part of the VIN that I am not totally sure about is the sequence number. I know the sequence started with "100000" which indicates that this is the 196,731st vehicle built.
Reference: Camshafts - GTO Factory Specs | Pontiac GTO Forum
Feb 14, 2016 · All Pontiac engines benefit from exhaust upgrades such as the RA exhaust manifolds or headers. The "744" and "041" require better flowing exhaust. You may also need a higher stall converter for automatics and better gearing. These 2 cams are more street/strip type cams in a 400CI.