Inspired1
Automotive
- Jan 11, 2006
- 2
Hi all,
After tons of searching I think I'll just ask before my eyes explode. I realize there isn't a prefect plenum size for a given motor but I'd like a professionals opinion about my specific application. Because I am no pro on the subject.
We're talking about a 4.3l turbo charged V6 that originally came out of a GMC Syclone. Stock Plenum is a single throttle body style with a LT1 Throttle Body mounted on the side, off centered toward the front.
I've built the motor to be around 550hp with ported vortec heads with 2.02/160's,larger hybrid turbo and the list goes on and on.
New plenum design is aluminum sheet metal with a front mount throttle body.{not much room for anything else}
Here are the stats: 4.3L V6 Turbo...not a drag racer...
Bore--4.030 / Stroke--3.480
Cyclinders---6 / Rod length--5.7"
Combustion Camber size--65cc / Piston Dish size--neg22cc
Maximum Rpms--around 6-7K / maximum boost--25psi
Compression ratio--8.2:1
My Q's:
1.I've heard soooooo many different percentages like 50-60 of engine displacement, 80-90 and even 100% on turbo motors....Can someone elaborate{cause I'm a newbie}on what plenum volume is supposed to be on a turbo motor with a maximum 7K RPM's?? Or at least give me approximation with explanation.
2. I resonation tuning really that practical in a turbo sheet metal intake??{For guy with a small wallet}
3. How do i test the plenum for even flow distribution to each intake runner??
4. What is the actual formula for figuring out intake volume??
Thanks for your time,
Malik