In 1967 the 400 4bbl engines went to new valve angle and placement and all Pontiac V-8's 1968 and newer. Newer valves don't line up correctly with the 67 2bbl, any 326 or all 1966-back piston valve reliefs (and obviously vice-versa), the correct piston has to be used if any sort of aftermarket high lift cam is used, or else there may be ...
Torque Specs Application: Method: Torque: Increment: Lubrication: Cylinder Head to Block (with Grease Under Head of Bolt) Bolt: 95 lb/ft *NOTE 1 25 lb/ft: Oil: Main Caps 1-4 to Block
We recently disassembled an excellent bone stock 1975 Pontiac 400 from a Trans-Am. Actual compression ratio was measured at 7.8:1. Cam was a Pontiac 066 and measured in at 197/206 - 112, as specs call for. Even with the original stretched timing chain, cam was found positioned at a 107 degree intake lobe centerline, also as specs call for. proper way to time a stock poncho is to pull the vac line to the dist and plug it ( so no vacum leak ) and time it warm at 750 rpm and set it to the factory specs ( on the radiator support ) , if your going to check for total timing you should get a timing tape and apply it to the balancer ( ussually easier to remove the balancerto do this as you have to remove all grease ) and check it at ... The Pontiac Engine. Pontiac Firing Order Pontiac V8 265, 301, 307*, 326, 350, 389, 400, 421, 428, 455 Firing Order Cylinder Numbering Distributor Rotation Rotor Under Cap Spins: Counter Clockwise (*307 rotates Clockwise) These graphics courtesy of Boxwrench.com. Sep 23, 2010 · I have a 67 Pontiac Firebird. It has a 400 ram air engine with an HEI distributor, 8.8mm plug wires, new timing chain, etc. The whole motor is rebuilt and the cam is now an Edelbrock performer cam with an Edelbrock performer intake and a thunder series carb. The cam has a .470 lift and a 320 duration i think.
Oct 22, 2017 · Timing a Pontiac 400 on a 1978 Trans Am. Block is code X7 and has 6X heads. Timing a Pontiac 400 on a 1978 Trans Am. Block is code X7 and has 6X heads. Specification index 1968 firebird specs, drill sizes, engine codes, equivalents, tire sizes, body plate identification, transmission codes. The Pontiac Firebird 400 weighs a claimed 1505 kg at the kerb. 6554 cc 335 ps @ 4800 rpm 583 N·m @ 3300 rpm Click for full specifications on Carfolio.com. Carfolio.com Car specs A-Z Stable 0 Feb 26, 2009 · well if you wanna run real fast use the COMP Magnum 305H. I'm into pontiac's pretty heavy and that is the best cam I've ever run. I've tried all the factory performance grinds RAM AIR cams,HO grinds, not even close. me and my buddy Big Block build a 455 with 6X heads, Magnum 305 cam, forged pistons, factory crank & rods, high rise intake Holley 850, 400 turbo, 12 bolt 4:11, 71 LeMans ran 10.60 ... Oct 22, 2017 · Timing a Pontiac 400 on a 1978 Trans Am. Block is code X7 and has 6X heads. Timing a Pontiac 400 on a 1978 Trans Am. Block is code X7 and has 6X heads.