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Showing results for tags 'flat top'.
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I am currently building my motor on my 280z, and I was looking at having the head chambers welded up. The issue I have ran into is everyone wants big money to perform this service. I was was wondering what everyone's opinion was on if should even weld the chambers, or if someone has a reasonable source to have this service done. My current build list is as follows: N42 Block N42 Head / Ported & Unshrouded .030" over ITM Flat-top pistons 280z rods w/ ARP rod bolts ARP main studs ARP head studs Triple Weber 45 DCOEs with Cannon intake Advance Distributors re-curved 280zx distributor w/ E12-80 ignition module Schneider factory cam regrind 284-92F grind Intake Duration (gross): 284 Exhaust Duration (gross): 292 Intake Duration (.050”): 236 Exhaust Duration (.050”): 244 Intake Valve Lift*: .488" Exhaust Valve Lift*: .504" Lobe Separation: 107 Intake Valve Lash: .010" Exhaust Valve Lash: .012" RPM Range: 3250-7250
So I recently got a 260z last month and this problem has finally gotten to me. The infamous post emissions Flat top SUs are bogging when I lay the pedal to the metal. They will just begin to barf gasoline out the overflow valve if I start it up and rev it while the carbs are still cold. But this especially happens up in the hills (In Alaska) and no matter how slow I start up the carbs they will bog and puke up good gasoline. All I can do is floor it till what I assume is the floats go back up. Usually all it takes is flooring it till it touches off on 5k revs. But this problem is very persistant and when I come down from the hills after the carbs go cold all they wanna do is bog for the next 5 to 10 minutes. Now I'm just gonna guess this problem is from sticky floats and fouled up Emission carbs. (cept for all the emissions are taken off because Alaska)