Single or Dual plane intake manifold?
10-09-2003 | 11:31 AM
#1
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From: Park Ridge, IL/ Sheridan Beach, IN
Single or Dual plane intake manifold?
Last parts to buy for my new T-540's are the intake manfiolds and carbs. I've got a pair of Edelbock Performers, but it looks like a single plane would be advantageous above 3500 rpm.
540 ci, 9:1, AFR 315 CNC, Crane 741, 9500# boat with TRS. Rev limiter set to 5500.
Didn't the 540 Bulldog come with a Dart Single Plane?
...............Single............Dual
RPM......HP.......TQ.......HP.......TQ
2000....229.....600.....247......647
2500....302.....633.....318......667
3000....371.....648.....381......667
3500....440.....660.....443......665
4000....508.....666.....502......659
4500....568.....663.....553......646
5000....604.....634.....584......613
5500....618.....590.....592......565
......Average 3500-5500 RPM.......
............548.....643.....535......630
540 ci, 9:1, AFR 315 CNC, Crane 741, 9500# boat with TRS. Rev limiter set to 5500.
Didn't the 540 Bulldog come with a Dart Single Plane?
...............Single............Dual
RPM......HP.......TQ.......HP.......TQ
2000....229.....600.....247......647
2500....302.....633.....318......667
3000....371.....648.....381......667
3500....440.....660.....443......665
4000....508.....666.....502......659
4500....568.....663.....553......646
5000....604.....634.....584......613
5500....618.....590.....592......565
......Average 3500-5500 RPM.......
............548.....643.....535......630
Last edited by Monty; 10-09-2003 at 11:36 AM.
10-09-2003 | 11:33 AM
#2
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From: Annapolis MD
Get good single planes. I had single planes on my motors and changed them to Performer RPM's on a recommendation they would give better mid range. I saw no imporvement in mid/cruise, and subjectively think the single planes actually ran better (don't have any hard RPM numbers). If I had a reason to remove the intakes I'd go back to single planes.
-Greg
-Greg
10-09-2003 | 11:39 AM
#3
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From: Holland, Michigan
I had a single plans switched to dual plane Edelbrocks and love them! I've been told The single planes dont help until you run over 6000.
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10-09-2003 | 12:05 PM
#6
Official OSO boat whore
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From: Mequon, WI
My 741 cammed 540 made 580hp with a Performer single plane. If I recall, it was over 100 in the dyno cell with a super high humidity. The heads were a Winters design that was fully ported. The carb is a 850.
10-09-2003 | 12:16 PM
#7
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From: Chicago il
Edelbrock Airgap makes great power.
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10-09-2003 | 03:44 PM
#8
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From: Waterford,MI
I have Merlin single plane on my 540's as per Teague's recomendation in a recent Powerboat mag. They seem to work very well. I don't need any more torque at low rpms. The boat planes at about 1/4 throttle and accelerates very well. Hard acceleration from low speed is just going to blow up Bravos, so I avoid it. Maybe a dual plane will get you better gas milage at 3000.
