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Gt40p head questions
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<blockquote data-quote="jbrown1238" data-source="post: 15078949" data-attributes="member: 56552"><p>No, I really don't plan to have it dyno'ed. I had a custom mail order tune done and revised by data logging a few times. It is dialed in pretty nice for what it is. It is well mannered, drives consistent 8-10 hours a day without beating you to death and has plenty of stop light to stop light power. It isn't anything crazy but sure is a lot of fun. You can definitely tell a big difference from the stock 5.0 set up. An estimate on rwhp is probably 275 on the lowside and 295 on the highside. It is mostly OE style parts, everything is new but most of the time and money was spent on quality machine work and balancing everything down to +/- .5 of a gram. Here are a few photos and the basics on the head work.</p><p></p><p>1. Trim and knock down the valve guide bumps in both intake and exhaust bowls </p><p>2. Back-cut the intake valves for better flow </p><p>3. Widen the push rod pinches to gasket-match the intake ports</p><p>4. Rough edge cleanup on the bowl / Bowl Blending</p><p>5. Increase & smooth the short side radius in the intake port</p><p>6. Raise/lower the intake port floor </p><p>7. Gasket match the intake ports </p><p>8. 3 angle valve job</p><p>9. Surfaced</p><p></p><p>[ATTACH=full]663691[/ATTACH]</p><p></p><p>[ATTACH=full]663692[/ATTACH]</p><p></p><p>[ATTACH=full]663693[/ATTACH]</p><p></p><p>[ATTACH=full]663694[/ATTACH]</p><p></p><p>[ATTACH=full]663695[/ATTACH]</p><p></p><p>[ATTACH=full]663696[/ATTACH]</p><p></p><p>The upper was gasket match ported and the lower was completely ported the entire length of the runners as well as gasket matched on both ends.</p><p></p><p>[ATTACH=full]663697[/ATTACH]</p><p></p><p>[ATTACH=full]663698[/ATTACH]</p><p></p><p>[ATTACH=full]663699[/ATTACH]</p><p></p><p>[ATTACH=full]663700[/ATTACH]</p><p></p><p>[ATTACH=full]663701[/ATTACH]</p><p></p><p>[ATTACH=full]663702[/ATTACH]</p><p></p><p>[ATTACH=full]663703[/ATTACH]</p><p></p><p>[ATTACH=full]663704[/ATTACH]</p><p></p><p>[ATTACH=full]663705[/ATTACH]</p></blockquote><p></p>
[QUOTE="jbrown1238, post: 15078949, member: 56552"] No, I really don't plan to have it dyno'ed. I had a custom mail order tune done and revised by data logging a few times. It is dialed in pretty nice for what it is. It is well mannered, drives consistent 8-10 hours a day without beating you to death and has plenty of stop light to stop light power. It isn't anything crazy but sure is a lot of fun. You can definitely tell a big difference from the stock 5.0 set up. An estimate on rwhp is probably 275 on the lowside and 295 on the highside. It is mostly OE style parts, everything is new but most of the time and money was spent on quality machine work and balancing everything down to +/- .5 of a gram. Here are a few photos and the basics on the head work. 1. Trim and knock down the valve guide bumps in both intake and exhaust bowls 2. Back-cut the intake valves for better flow 3. Widen the push rod pinches to gasket-match the intake ports 4. Rough edge cleanup on the bowl / Bowl Blending 5. Increase & smooth the short side radius in the intake port 6. Raise/lower the intake port floor 7. Gasket match the intake ports 8. 3 angle valve job 9. Surfaced [ATTACH=full]663691[/ATTACH] [ATTACH=full]663692[/ATTACH] [ATTACH=full]663693[/ATTACH] [ATTACH=full]663694[/ATTACH] [ATTACH=full]663695[/ATTACH] [ATTACH=full]663696[/ATTACH] The upper was gasket match ported and the lower was completely ported the entire length of the runners as well as gasket matched on both ends. [ATTACH=full]663697[/ATTACH] [ATTACH=full]663698[/ATTACH] [ATTACH=full]663699[/ATTACH] [ATTACH=full]663700[/ATTACH] [ATTACH=full]663701[/ATTACH] [ATTACH=full]663702[/ATTACH] [ATTACH=full]663703[/ATTACH] [ATTACH=full]663704[/ATTACH] [ATTACH=full]663705[/ATTACH] [/QUOTE]
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