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Thread: 155 4-tec wot rpms
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05-07-2008, 08:00 PM #1
155 4-tec wot rpms
What should the rpms be at wot with the 155 4-tec.This is in my 07 speedster and at wot I'm turning 7450 rpms.I'm thinking it should be at 7800......am I right.
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05-07-2008, 08:02 PM #2
I was told by Shibby that the rev limiter kicks in at 7650 on the 155 4-TEC engines. Impros said that I should be at or just above 7500 at WOT.
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05-07-2008, 08:34 PM #3
Cool,thank's dude.Did you change anything to get anymore top end speed out of your boat.
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05-07-2008, 08:35 PM #4
Ya, I switched out my impellers and added a custom air intake. I will find out the results tmorrow when I hit the water.
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05-07-2008, 09:18 PM #5
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05-08-2008, 08:31 PM #6
Buddydoo,
Read my results in this thread. I wasn't too imressed with my modification.
http://www.greenhulk.net/forums/show...3&postcount=39
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05-10-2008, 03:22 PM #7
What about the impeller,did it better your hole shot.And which impeller did you use.
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05-10-2008, 04:38 PM #8
- Join Date
- Aug 2007
- Location
- South Texas
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- 18
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05-10-2008, 05:00 PM #9
I went with the Solas Concord 11/19. Much better mid range and decent hole shot. Mot much improvement on the top end but I lost about 200 RPM's by switching. I'm turning 7150 on the port-side and 6850 on the starboard-side. I'm sending them into Impros in the next few weeks to get them both dialed in at 7500-7550. Should get me a couple of MPH on the top end and better hole shot.
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05-12-2008, 06:22 PM #10
- Join Date
- Sep 2007
- Location
- Kansas
- Posts
- 11
Engine RPM
Hey spd5535, why is it that both our Utopias run less rpm on the starboard side engine? When I am at WOT, I can hardly keep the boat straight as it is pulling so hard to the starboard side. Engine RPM's are at 7100 Starboard and 7400 Portside. Back off the trottle just a little, and she straightens out and seems to drive better. Both engines at 7500 from the start. I have tried to adjust the throttle cables but to no avail. Any advise?
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