[DCVING]

Well my first outing in my first Pontiac build was somewhat a success. The car performed very well, went nice and straight and hooked up good. So I know my suspension is working. The engine ran strong but I felt it was down in power. Once it got off the line it felt a little lazy, especially up top. The E.T and MPH were down considering how strong it was leaving on footbrake.

So the best pass of the day was a [email protected] , 1.37 60ft time. I was thrilled how it ran but feel it was off. So the 60ft tells me my 3400lb GTO should have been running 9.80’s according to Wallace Racing Calculator.

One of the not so immediate things I noticed was my AFR in 2nd and 3rd gear was showing a very lean 13.8-14.1 afr. This was concerning to me so I called it a day after my third pass. First two passes I was too busy watching tach and oil pressure. Wasn’t till the 3rd pass I noticed this lean reading. Yes I know you can’t just go off AFR and I need to read the plugs. Unfortunately I didn’t have an extra set with me. I also didn’t have jets or air bleeds with me to try and richer it up.

Engine: 1968 YC 400 Block now 461ci, Drilled for Kauffman Billet 4 bolt mains w/studs, 3/4 filled, Kauffman bore brace, Ohio Forged 4.250 stroke Crank, Eagle Forged 6.800 rods, Icon Forged flat top pistons 4.155, Old Style Edelbrock Round Ports 64cc 330CFM heads w/studs & cometic gaskets, Lunati Solid Roller 282/282 .404/.404 lobe lift 104IC Crower 1.65's w/stud girdle, Port matched Victor 4150 intake, ProSystems 1000cfm carb, MSD Crank Trigger, 13.1: compression, MSD 6AL

Fuel - VP X16
Timing 38*
Plugs - NGK R5671A-8 .035
Carb - 4150 w/ 84/92 jets

So what’s a good octane fuel for my build?
Should I run a hotter plug? #7’s
Timing on old E-Heads?
Jetting?