Single plane vs dual plane intake
Could someone explain the pros and cons of the two. Is one better than the other. If so why. Is one better for the street.
Dual plane, Pro, excellent street, street strip intake manifold that creates more low end torque with longer run eddy.
Con - Limited Racing application.
single plane - opposite of above.
Pro - Excellent high end power for racing and limited street use. Better fuel distribution. (Normally it not always.)
Con - Low end torque take a huge hit. Drivability in that low rpm range suffers. And! If you do not want a hole in your hood, that’s another con. ( or so much for me....)
so that was a pretty good read. But it makes me wonder about my future stroker build. At what point do u say it needs a single plane intake. I would think it would be trial and error
This question has been asked a lot. It seems to me that there is a break point, that area when one is better than the other is around the low 11’a, high 10’s. But this is also on certain cars/engine combos that I have seen.
I could be outta wack here.
Other things that will influence the choice of manifold would be;
Actual CID
Heads, ported or not
Cam size
Car weight
Rear gears
Tire size
The actual usage of the car. Street or strip.
As it has been always said, if your in the street, your probably better off with a dual plane 95% of the time.
If your going to equate the intake choice by cam size/duration, the above comes back into play. I would say if your cam is smaller than 255/
[email protected] & your in the street, take the dual plane.
Hey f your at the track and your car is properly lightened up a lot, single plane.
I’m thinking somewhere around 373’s.
Interesting reply on what gear to use a single plane on.
I wouldn’t look at a single plane intake with less than 4.10/4.30 gears depending on a lot of other factors as well. And that is really me pushing it on gears.
I have also heard that the dual planes are very hard to get even A/F ratios from cylinder to cylinder like you can with a single plane.
All intakes, save a very very, very few, will need help in this area.
And when you do your stroker build at what point do you say dual quad tunnel ram!!?..:D..
Immediately!
You might be right. I have always heard that because of the unequal plenum sizes and runner lengths, it was difficult to get flow velocity and A/F ratios close from cylinder to cylinder.
Again, as with most every intake, there can be an improvement with very very very few exceptions.
While that would be ideal to make that a goal and hunt for it, on the street, you’ll never know or feel it.
