Single vs Dual Plane Intakes on 540
#1
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Single vs Dual Plane Intakes on 540
New poject is to build conservative 550-600 HP 540 storker engines out of my stock merc 502s. Boat is a very heavy express cruiser with arneson drives and will be used at 40mph fuel efficient (relatively speaking) cruise 90% of the time.
Build not finalized but assume:
Scat 540 assembly
Holley 850s
Stock Merc iron heads with fresh valves/iconel/2.25/1.88
Crane 741-type CAM
Gill SS wet exaust
Intake?????
Not too concerned about WOT or high rpm running and am a bit confused about single versus dual plane intakes on a 540:
Which one to use and why?
Does the dual enhance torque but kill top end?
When does single plane kick in - at what rpms?
As always - thanks experts!
Build not finalized but assume:
Scat 540 assembly
Holley 850s
Stock Merc iron heads with fresh valves/iconel/2.25/1.88
Crane 741-type CAM
Gill SS wet exaust
Intake?????
Not too concerned about WOT or high rpm running and am a bit confused about single versus dual plane intakes on a 540:
Which one to use and why?
Does the dual enhance torque but kill top end?
When does single plane kick in - at what rpms?
As always - thanks experts!
#2
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Join Date: Aug 2005
Location: sint maarten
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it sounds to me like you want a dual plane but for that sort of usage, a good clean either factory or aftermarket mpi injection would be perfect. it would give you the best torque at the precise rpm you want with the very best fuel economy you could get. money very well spent in my opinion.
#4
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Dual plane like an Edelbrock Performer. I would use a slightly smaller cam to get a power peak in the low 5000 area. Let torque move the boat. That way the motor will be happy cruising at 3500 rpm. Get better fuel milage also.
#6
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I just put on a merlin dual plane intake with 850 wholley on my new 415hp 502 replacement long block. I just dyno'd them if you want the sheets.
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