Single Plane Intake vs Dual Plane for my build

[darrin75]

Rebuilt Mopar 383 Engine & Transmmission Note:
OK here is the scoop on the 383 and trans.There will be all NEW PARTS unless stated,I will start at the top of the motor,750 Holley carb,Used single plane intake painted nice,Chrome valve covers,chrome air cleaner,452 heads with a 3 angle valve job and hardened seats for unleaded premium,509 cam and lifters,pushrods,timing chain,pistons 10 to 1 compression so you can still drive arround town on unleaded premium,pistons Keith Black,with there rings,chrome pan,Crank turned 20 and 20,rods rebuilt

With the Build above would there be any advance to going to a Dual Plane Intake??

[Ghoste]

Depending on the single and dual planes compared there could be.  Also, you didn't mention the trans and that is a factor as well as the rear end ratio.

[Rolling_Thunder]

the main advantage of a dual plane intake is better low end but a sacrifice of a few top end HP. for a street car i usually go with a dual plane simply because how often (on the street) do you spend at 5500rpm+ ?  not much for me.

Then again you will have some others chime in with their opinion   

[firefighter3931]

The performer RPm dual plane would be a good choice.  Do youself a favor and lose that 509 cam....it'll be a tuning nightmare. 


Ron

[darrin75]

The performer RPM dual plane would be a good choice.  Do youself a favor and lose that 509 cam....it'll be a tuning nightmare. 


Ron

Well Ron,  probably will change the cam over the winter, but right now, the car is in tune and running like a beast.  really it is.  Just trying to squeeze every HP  out of it.

[Rolling_Thunder]

Do youself a favor and lose that 509 cam....it'll be a tuning nightmare. 
Ron

[rt green]

is it an auto or a manual?  last i knew  the 509 was ment for a  manual trans. 

[daytonalo]

Exactly , I run my 540 BB chevy @ 5300 RPM all day long in Race boat , it has a Victor JR single plane

[firefighter3931]

The performer RPM dual plane would be a good choice.  Do youself a favor and lose that 509 cam....it'll be a tuning nightmare. 


Ron

Well Ron,  probably will change the cam over the winter, but right now, the car is in tune and running like a beast.  really it is.  Just trying to squeeze every HP  out of it.

The lowdeck (383-400) RPm manifold is an excellent piece....it would still be my choice for a 383 that is overcammed. Now on a bigger 451-470 lowdeck stroker that might change depending on the rest of the build. 


Ron

[Streetwize]

The RPM is a good choice but the 509 won't fall out of a tree below around 3600 with a 10:1 383, It'll run strong above 4000 but unless you have deep gears and a 3500 stall or a stick there's better cam choices. The problem is you've got a lot of duration past BDC combined with a really short 3.375" stroke. moving it up to 104 or even 102 would help but a much better 383 cam would be the Crower 271HDP which is 226/234 @.050 and ~490 lift. The biggest cam I would put in there would be the Ultradyne 231/239 @.050 or the Hughes Engle 230/238...trust me either one oof these will give you a broader powerband and higher average torque and throttle response than the 509. 509's work great in 10:1 440's with single planes and 3200-3500 stall in 3200 pound A bodies though.

[Sledge57]

The lowdeck (383-400) RPM manifold is an excellent piece....it would still be my choice for a 383 that is overcammed. Now on a bigger 451-470 lowdeck stroker that might change depending on the rest of the build. 
Ron

I agree that the Performer RPM for the 383 is a good intake and it works just fine on my 470 too.  Never dyno'd but seat of the pants says it pulls strong up to 6000 or so.

470 with a 259@.050 585 lift solid.

[Ghoste]

The strip dyno is best and most accurate one anyway Doug.