Pontiac Solstice Forum
A forum community dedicated to Pontiac Solstice owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, trade parts, and more!
67' 670 Heads - Pontiac GTO Forum
Jul 21, 2010 · Your 670 heads started life at 76cc's. The 72cc's was the advertised size, but like most Pontiac heads they were larger. You will be at about 72cc's if a normal cleanup cut was performed when a valve job was done. You could also be at around 68cc's if more cleanup cuts have been done or a shop got carried away on the milling.
#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.
Pontiac Solstice and Saturn Sky: Read this before you...
Dec 7, 2023 · Pontiac Solstice: The extra top insulation offered as an option for 2006 and ’07 (and standard on the Sky) becomes standard, as does OnStar and a trip computer. The GXP’s StabiliTrak and ABS become available on the base Solstice. A Club Sport suspension package with unique 18-inch wheels is optional on both models.
Radio Wiring - Pontiac Solstice Forum
Jan 12, 2020 · 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
#47 Heads Issues - Pontiac GTO Forum
Jun 13, 2012 · When I was running Super Stock, we found that Pontiac Compression ratios were often over-stated by a full compression point. I.e., the GTO engines advertised at 10.75:1 were actually 9.75:1 if you measured everything out. The only way to get them to the advertised 10.75:1 ratio was to mill the heads to the NHRA minimum allowable chamber volume.
455 YA code? - Pontiac GTO Forum
Jan 9, 2024 · The 1964-1974 Pontiac Tempest, Lemans & GTO. 1964-1974 Tempest/LeMans/GTO Engine Tuning 455 YA code? Jump ...
Heater fan speed issues - Pontiac GTO Forum
Aug 30, 2008 · The 1964-1974 Pontiac Tempest, Lemans & GTO. 1964-1974 Tempest, Lemans & GTO Conv. Top/Interior
1.5 or 1.65 roller rockers - Pontiac GTO Forum
Apr 25, 2018 · Factory Pontiac bottleneck studs have been known to break at the bottleneck when put under higher than factory loads. Also when you start changing things, you change geometries and may be forced to run an adjustable rocker system (if you aren't already --- and if you're running a different cam then you really SHOULD be).
428 vs 455 - Pontiac GTO Forum
Jan 21, 2024 · The 1964-1974 Pontiac Tempest, Lemans & GTO. 1964-1974 Tempest/LeMans/GTO Engine Tuning 428 vs 455. Jump ...