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tmoss · 04-06-2003, 08:37 AM

I would expect 10-20 HP from porting the lower depending on other factors around engine condition, tune, etc.

I suggest you do two posts on a few forums. One asking for the measurements of the stock GT40 head intake runner opening and the second asking guys who have just ported their lower Cobra intakes what kind of power or 1/4 MIle MPH gains they saw. ET is not a good measure of power gain as it depends on too many other variables - MPH is best for that.

04-06-2003, 08:37 AM	#4
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	I would expect 10-20 HP from porting the lower depending on other factors around engine condition, tune, etc. I suggest you do two posts on a few forums. One asking for the measurements of the stock GT40 head intake runner opening and the second asking guys who have just ported their lower Cobra intakes what kind of power or 1/4 MIle MPH gains they saw. ET is not a good measure of power gain as it depends on too many other variables - MPH is best for that. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/