Not Ranked
Manifold on my Superformance...
Hey, 347...I'm running a Performer dual plane, with 1/2" phenolic spacer under my Holley 750-HP, and a 1/2" aluminum spacer on top between the carb and air cleaner. I'm running a FoMoSpo 14" round air cleaner with a K&N filter. The engine would perform better with a 1" phenolic spacer...even better with a 2" spacer....but I'd have to butcher my hood and I don't want to sacrifice the original hood look.
Mr. Fixit...you're right about the differences between the 4150-HP model Holleys and non -HP models. Indeed, there is a huge difference in the metering and overall quality of the carburator. Bottom line, at least in this area, you do indeed get what you pay for. You can spend $250 or $600 .... one is a good carburator, the other is a GREAT carburator. And your tuning explanation is exactly the way I remember it... drive ... stop ... pull the plugs and read 'em ... adjust something and go do it again.
Not meaning to take anything away from anyone elses preferred carburator, be it Barry Grant, AED, Street Avenger, Speed Demon, Road Demon, Carter, Quadrajet....or Staniframitz...which ever one seems to work best in your application....
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Flyin_Freddie
"An opinion on everything...an expert at nothin'!"
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