Any induction experts here?
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Any induction experts here?
Trying to firm up a cold air intake system on my EFI '61.
I have a 1000 CFM throttle body mounted atop a Victor Jr manifold. There is 3.8" surface to surface clearance between the top of the throttle body, and the bottom of the hood, so I figure about 3.5" is as far as I want to go, height wise above the T-body.
I will be using the original 4.5" FI fresh air inlet at the rad support, and figured on taking a 4.5" flex hose back to a custom air cleaner box mounted about where the original FI air cleaner went. I can fit a 110 square inch aircleaner in an aircjeaner box at that location w/o problem.
Now for the harder part:
Does anybody make plenums that will fit on the T-body (5.12" diameter) that will handle my required 650 CFM without more than an inch or so of H2O pressure drop restiction?
Is a 4" aluminum tube/w rubber adaptor pieces from the outlet of the aircleaner box to teh T-body plenum adequate for this airflow, assuming two 45 degree angle bends?
What sort of turbulance issues, if any, will I run into with a side fed plenum, as compared to how a regular 360 degree air cleaner feed a T-body?
Any other suggestions?
Thanks,
Doug
I have a 1000 CFM throttle body mounted atop a Victor Jr manifold. There is 3.8" surface to surface clearance between the top of the throttle body, and the bottom of the hood, so I figure about 3.5" is as far as I want to go, height wise above the T-body.
I will be using the original 4.5" FI fresh air inlet at the rad support, and figured on taking a 4.5" flex hose back to a custom air cleaner box mounted about where the original FI air cleaner went. I can fit a 110 square inch aircleaner in an aircjeaner box at that location w/o problem.
Now for the harder part:
Does anybody make plenums that will fit on the T-body (5.12" diameter) that will handle my required 650 CFM without more than an inch or so of H2O pressure drop restiction?
Is a 4" aluminum tube/w rubber adaptor pieces from the outlet of the aircleaner box to teh T-body plenum adequate for this airflow, assuming two 45 degree angle bends?
What sort of turbulance issues, if any, will I run into with a side fed plenum, as compared to how a regular 360 degree air cleaner feed a T-body?
Any other suggestions?
Thanks,
Doug
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Originally Posted by 71coupe
Procharger sell this hat for their blower systems, might work with your setup
What brand EFI are you using?
What brand EFI are you using?
The four barrel throttle body I have has 9.62 sq-in of throttle plate (rated 1000 CFM). the 3.5" Pro-charger hat has about about 8.3 sq-in of inlet area.
Maybe need something a bit larger, IF I need it? Do I need to stay same size inlet area on the intake tube as the throttle plates, or will my 650 CFM flow OK with minimal loss thru a 3.5" OD tube?
EFI is a custom setup using a MEFI-4b ECU, on a Victor Jr manifold.
Thanks,
Doug
Thread Starter
Race Director
Joined: Oct 2005
Posts: 12,470
Likes: 1,548
From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Most of their applications are large open aircleaner for racing, with some induction setups but the induction setups I have seen, seem more for show with all the mirror polished tubing, etc. Not sure how much science went into the choices and sizing, as they tell me: "We have used 3.5" up to 383 and it seemed OK". That isn't science.
I have found a LOT of material on exhaust; flowrates vs pipe size, collector lengths, resonator boxes, etc, but next to nothing on the intake side WRT to actually engineering a system, rather than hanging a bunch of parts on and hoping it was better than the last set of parts.
Doug
I have found a LOT of material on exhaust; flowrates vs pipe size, collector lengths, resonator boxes, etc, but next to nothing on the intake side WRT to actually engineering a system, rather than hanging a bunch of parts on and hoping it was better than the last set of parts.
Doug
