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#11 |
VIP Member
Join Date: Dec 2014
Location: The Land of Bayous, Boudin & Crawfish
Posts: 1,668
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I'd really prefer not to repeat most of what I post here.
BUT, I know how posts can get buried in a thread, and some will never go back & see 'em. AND, this is something I'd really like some opinions on, from those who may know, or be a position to give a real world, experienced opinion about. It concerns the 1974 2-barrel 400 engine. It uses the 1.25V carb, & the #46 heads, with 88.9cc chambers. http://www.classracerinfo.com/Engine...6&MAKE=Pontiac http://www.classracerinfo.com/Engine...7&MAKE=Pontiac (1) NHRA weight for a base '74 Bird is 3545. A Formy is only slightly more. At the current 255hp factor, you could add a little weight & run M/SA, with a 12.85 index. I don't think a 2-barrel 400 could run that quick. But, I don't know. http://www.classracerinfo.com/Engine...px?ENGINE=2087 http://www.classracerinfo.com/NHRA_Classes.aspx (2) It has been posted, & most here know that you can many times get NHRA to lower the hp factor on some combos that have not been flogged much, or at all. IF you could get them to lower this factor to 225hp, the Birds could run P/SA, with a 13.45 index. So, the question is, how quick could this combo go ? Do ya'll think low 13's are possible ? That 225hp number is 50hp less than the '74 Q-jet 400. Does a 225hp factor seem reasonable to ya'll ? http://www.classracerinfo.com/Engine...9&MAKE=Pontiac Even a bit lower might be reasonable. I say this, because the 1970 350 Chevy 2-barrel engine is 224hp, compared to the 290hp factor for the Q-jet version. That's a 66hp drop. And the 2-barrel is a 1.375V model. So, if you dropped say 65hp from the Q-jet 400, you have a 210hp factor. Just exactly what do ya'll think this combo could run, & how much do you think someone could get NHRA to lower the factor ? I know a lot of ya'll have been familiar with the NHRA hp factoring system for a long time. So, I'd like your opinon on this. Last edited by oldskool; 02-06-2020 at 02:33 PM. |
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