Title: Best Carb CFM (VS/MS) Combo? 383 stroker/VORTEC/TKO600/MSD/3.73
Whats up Chevelle family, working on the 70 quite a bit this year and now with this down time in the world, have been able to invest a bit more time.
Some of the major upgrade this year - TKO600, New Fuel Tank, Steel fuel lines, holley billet black pump (pre and post filters), new engine side wiring harness, new Distributor, fully resealed engine. New UMI spuspension all the way around
What is the ideal Carb & CFM (Mechanical or Vacuum Secondaries) combo for best street drivability and performance
with my current setup. I have had some feedback in regards to mechanical vs vacuum secondaries and the info I receive has been all over the place, I am still on the fence. I hear Mechanical secondaries are the way to go with a manual trans, although I also hear there is a "flat spot" with street use/driving. I also hear that modern vacuum secondaries out perform mechanical double pumpers even with manual trans for street use. I am on the fence.
Current & Intended Driving:
Daily driver, street rod, plan to take it to the track rarely, after I get the safety items checked off.
My mildly modified setup:
383 stroker/TKO600 5speed/votec heads/mild lunato vodoo cam/MSD Ignition/heman headsers/3.73 10 bolt/electric fuel pump
What are your thoughts on the following?
What is the best Holly type carb
(I have had several and like/understand them)?
What is the proper CFM given my current setup
? For mostly street, and daily driving use
Should I go with Mechanical or Vacuum Secondaries? (Pros/Cons)? totally on the fence with this one
I was considering the following carbs:
1: Holley Brawler 670 CFM (mechanical secondaries double pumper)
2: Holley Street Avenger 670 vacuum secondaries
3: Pro Systems bench built carb (https://www.prosystemsracing.com
I know there are several legends on this board, so thought I would ask here before making a decision. Thanks in advance.
Just for reference this is an old post I did a while back when selecting the carb for when I had the 700R4 and before many upgrades since then for reference or anyone who is running a similar setup below.