chodjinn wrote:Hi,
I've just done the calculation for my engine. I'm running a 3.5litre V8 (215 cu) and used peak rpm as 6,000. I plan on using a single throttle body when I move over to Injection. According to the calculation I need a single throttle body with 20sq.in, which results in a 5" throttle body!
I was planning on using either a single 72mm or 90mm?
Anybody provide any advice?
Yeah, that sounds way huge!
BTW, is it a 1960s Buick 215 or the Rover one?
I have a 4300 series Buick 215 I'm rebuilding right now and have a selection of throttle bodies to choose from depending on how I choose to design the intake manifold.
Using the calculator here they list at.....
One @ 50mm is rated at 144 HP 5.0L V8 Mustang.
One @ 65mm is rated at 243 HP 4.6L V8 Thunderbird.
Two @ 45mm is rated at 233 HP 3.5L V6 Concord.
I'm thinking of two 180 deg (all 4 intake pulses 180 deg apart) plenums with a 45mm throttle body for each one.
In the Buick 215 V8 would be.
Cylinders 1 4 6 7 fire 180 deg apart in one plenum.
Cylinders 2 3 5 8 fire 180 deg apart in one plenum.