What do you think of this combo
#1
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What do you think of this combo
I bought a Black Thunder with a wild engine combination. 540 ci, Cam Motion solid roller 248/253 dur. 690 lift 112 center. Holley Pro Rams with 2-750 dp's. Msd ignition. With extension boxes and labbed 24 bravo 1's the boat goes 69 mph at 5000 rpm. Empty or 7 people and 1000 lbs of fuel same speed. Seems very odd to me.
#5
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Platinum Member
What heads?
Compression is on the low side for sure.
Is this a 43'er??
Have you checked to see if the carbs are opening all the way? Wide open throttle fuel pressure? Do you know what your ignition timing is at WOT? How do the plugs look after 10 seconds wide open?
Compression is on the low side for sure.
Is this a 43'er??
Have you checked to see if the carbs are opening all the way? Wide open throttle fuel pressure? Do you know what your ignition timing is at WOT? How do the plugs look after 10 seconds wide open?
#6
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The heads are GM iron sq. port pocket ported and intake matched by Tyler Crockett. 2.25 intakes.
It is a 43.
The carbs do open all the way. It doesn't seem to matter though., the boat does't go faster it just makes more noise.
The ignition timing is 16 at idle and 36 at 3000.
Plugs are a little rich if anything.
The engines do burn a quart of oil about every 4 hours.
It is a 43.
The carbs do open all the way. It doesn't seem to matter though., the boat does't go faster it just makes more noise.
The ignition timing is 16 at idle and 36 at 3000.
Plugs are a little rich if anything.
The engines do burn a quart of oil about every 4 hours.