WebMar 7, 2007 · The "regular" GT-40 144 cc iron head used on the 93 Must. Cobra is just the 69-70 (74) big plug head with later model rocker arms, small spark plugs, and hardened exhaust seats. Most of the SBF factory heads have almost identical exhaust ports except for some smog bumps here and there. WebThe GT40P cylinder heads had a small combustion chamber ranging from 58-61cc while the GT40 heads had a 63-66cc combustion chamber. The GT40 heads have thermactor holes …
GT40 vs GT40P Who has smaller chamber volume with more compress…
WebDec 12, 2005 · My gf also has a 93L, but hers does have a better exhuast system and a cold air intake. It does run obviously harder than mine. I have heard that just exhuast wakes these trucks up, and hers is proof that coupled with an air intake it really does. '93 Lightning 15.23 @ 88.9 mph, 214k miles, completely stock. 1 - 8 of 8 Posts. WebApr 13, 2009 · Better plug placement and needs correct headers because of plug placement. Smaller CC than the GT-40 for higher compression (if you need or want more compression) GT-40X - Aluminum heads. Each aluminum head weighs approximately 22 lbs. – approximately 25 lbs. lighter than each cast iron GT-40 head. in degree of a node
Upgrading Fox Body Cylinder Heads - AmericanMuscle.com
WebFeatures hardened 4140 Chromoly retainers, valve locks, spring shims, a spring height gauge, valve seals, and instructions. Best of all, no machining is required to install these on your stock cast iron heads! Works on all … WebJan 4, 2010 · They list two sets of springs that they reccomend both of which of have a much higher spring rate and seat pressure (117,132 lbs) than the stock springs. Should that be? Also it seemed as though the springs were universal, meaning their intake/exhaust looked like they were the same length, but they certainly aren't on GT40 heads, so what … WebMay 7, 2014 · REMANUFACTURED FORD 302 5.0 COBRA GT40 CYLINDER HEADS Posted on May 07, 2014 by promarengine We are offering a pair of original Ford Cobra 5.0 GT40 cast … in degree of a graph