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Post by gofast24 on Jul 12, 2019 10:15:17 GMT -5
After 5 years in Lake Lanier Decided to have diver wash bottom/props/rudders etc.)($8 / ft, $320 total). Wasn't too bad, but a small nick on port prop which was there when bought vessel in 2014. Will try to figure out how to post picture later.
Results at WOT, 21 MPH, (calm seas, no wind to speak of), by GPS at helm and smart phone GPS speed. Viewing some boat test web sites for our boat we should be doing about 30 MPH (28 knots)? Anyone have any experience with the 4160 (or derivatives) and the dual VP 8.1 GSiI-A V drive 420 HP rated engines? Only 4 people on board, black water tank 1/2 full, fuel tanks about 75 gallons each, potable water tank 1/2 full FYI.
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Post by jnelson90 on Jul 12, 2019 10:41:07 GMT -5
I have the 2006 Regal 3860 with VP 8.1 GXiI-F engines and I am able to get about 30MPH. What are you seeing for RPM at WOT? Hope all is well and happy boating!
Jeff
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Post by gofast24 on Jul 13, 2019 9:59:30 GMT -5
I have the 2006 Regal 3860 with VP 8.1 GXiI-F engines and I am able to get about 30MPH. What are you seeing for RPM at WOT? Hope all is well and happy boating! Jeff From your model number you should have the 420 HP V drive inboard engines? From our surveyors report Aug, 2014 = "Wide Open Throttle: 3650 RPM 22.6 MPH? Dont believe the RPM is correct so will have son (taking boat out tomorrow verify what the WOT RPM is now). WOT RPM should be somewhere around 4600/5000? Thanks for your response, will let you know what I find out regarding the WOT RPM! |
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Post by gofast24 on Jul 15, 2019 11:12:14 GMT -5
Son never got to vessel yesterday. He thinks WOT RPM about 4000 when measuring the MPH, don't like him "thinking" is was about xxx RPM, want to know exactly what it is  Also, checked on VP site, our 8.1GSiI-A engines (420 HP each at WOT) have a max rated RPM of 4600. As we need the port prop repaired will ask prop shop about changing from 22" dia X 21" pitch to 22" X 20" pitch to increase WOT RPM to about 200/300 more than the 4000 son "thinks" it was! Anyone with experience with changeing pitch by - 1" as to the RPM increase? From past experience on I/O's with cupped props 1" pitch would be about 200 RPM? |
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Post by gofast24 on Aug 12, 2019 10:32:03 GMT -5
Did a WOT test run yesterday. Attached picture (if it actually attaches / no it wont, file is 2.3 meg?) shows 3550 port /3720 on starboard. Knots = 19.3 ( about 22 MPH), virtually the same reading as when sea trial done in 2014 and hull cleaning two weeks ago. As the engines WOT max RPM range is 4600/5000 (Per VP Spec's) suspect 22" X 21" props are over pitched? Could use 300/400 more RPM increase at WOT so reduce pitch by 1 or 2 inches to 22"/19"? Anyone with same vessel/engines have any thoughts?
Specifics on WOT run = Fuel Tanks 1/2 full each, black water tank 1/4 full, fresh water tank 1/2 full, two people on boat, calm seas and not any wind. Smartphone GPS knots agreed with dash reading of 19.3 .
Thanks!
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Post by Safe Harbor on Apr 21, 2020 8:24:59 GMT -5
Did a WOT test run yesterday. Attached picture (if it actually attaches / no it wont, file is 2.3 meg?) shows 3550 port /3720 on starboard. Knots = 19.3 ( about 22 MPH), virtually the same reading as when sea trial done in 2014 and hull cleaning two weeks ago. As the engines WOT max RPM range is 4600/5000 (Per VP Spec's) suspect 22" X 21" props are over pitched? Could use 300/400 more RPM increase at WOT so reduce pitch by 1 or 2 inches to 22"/19"? Anyone with same vessel/engines have any thoughts? Specifics on WOT run = Fuel Tanks 1/2 full each, black water tank 1/4 full, fresh water tank 1/2 full, two people on boat, calm seas and not any wind. Smartphone GPS knots agreed with dash reading of 19.3 . Thanks! - I know this an old post but I'm new to the forum. Sent you a message about this a few weeks ago. Please let me know when you get a moment. Thanks. |
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Post by gofast24 on Apr 23, 2020 10:32:11 GMT -5
Didnt get message?
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Post by Safe Harbor on May 9, 2020 11:07:22 GMT -5
Hmmm says it went thru in my outbox. Can u ping me directly and I will respond to that? Thanks! |
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Post by gofast24 on May 10, 2020 10:20:40 GMT -5
Hmmm says it went thru in my outbox. Can u ping me directly and I will respond to that? Thanks! Just re post it to this forum, lets see if that works? |
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Post by Safe Harbor on May 12, 2020 19:33:30 GMT -5
Here you go. Feel free to take off line or respond using the messaging system
“Fellow 4160er
Just joined - happy to see these forums have been resurrected. Did a search on "4160" and found a bunch of your posts. Just d/l'ed your maintenance list - thanks so much for your diligence. You're the type of person I'd want to buy after. I have a few questions about your boat - would you like me to send them here or is there an e-mail you prefer? Namely, what size props did you end up with on your boat? I have 2-(4) BLADED NIBRAL 22D X 22P but like one of your other posts, my cruising and WOT speeds have diminished significantly over the years. I have it pulled and power washed annually and just had the bottom redone last year. My props have been reconditioned more times thatn Im proud of - a lot of stuff in our river especially after storms. I know diesels are rated much differently than your gas engines but I have the stats from when the boat was made for all the options and I'm not even sniffing what it should be. My stats on my survey in 2014 were cruising @2700rom = 19knts. WOT @3300 = 26 knts. I'm lucky to get 18 knts WOT these days.....
Sorry to ramble. I'm sure I will have a bunch more questions after looking at your list but was curious as to your props. Thanks and thanks again for moderating this form.
-Neal”
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Post by gofast24 on May 13, 2020 10:46:34 GMT -5
OEM props were 22X21 . A few dings and a slightly bent blade or two on both props. Max WOT RPM was only around 3600 and 24 knots or so . Finally determined to get both props pulled , and repaired/ re pitched to original specs by actual prop OEM in FL. Now am at 26 knots (about 30 MPH) and 4100 RPM WOT. Money well spent even though we seldom run WOT for more than 1-2 minutes to jsut get up on plane. Then back down to about 3400 RPM to cruise.
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