My new to me 88 272
05-10-2008 | 08:56 AM
#11
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Joined: Nov 2005
Posts: 1,028
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From: Grand Rapids MI
Thanks!! I actually just got off the phone with a engine guy I know talkin about some upgrades... cam, headers and carb for sure... heck as heavy as it is I'd be happy with 58-62 with stock 350mags....
I have a spare Quicksilver 23p would you guys recommend me picking up another Quicksilver and throwing those on instead of the Mirage +'s
I have a spare Quicksilver 23p would you guys recommend me picking up another Quicksilver and throwing those on instead of the Mirage +'s
Standard 23 Mirage 59.9999 With me full load of fuel at @47-4800 I could spin standard 21 Mirages 5000 but lost 3 mph. With the 23's cruise was 40 @3300 that was with gear and my wife and i. GREAT boat you will love it. Now you need to Put Rambunctious's "THRU THUNDER KIT" on it.
05-10-2008 | 09:03 AM
#12
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From: Illinois
Yup thats the boat... first thing I did was pull off the name on the side.....
05-10-2008 | 01:26 PM
#13
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Posts: 158
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From: Napa, CA
Mine is an 85 and I got 58 on gps last summer at around 4800. just did heads cams, intakes and carbs. hope to see a little improvement. the engines should be right at 400 pony's. I'm scared to go any more cuz I've heard that the alphas don't like much power. I also bought the 23p +.
05-11-2008 | 08:27 PM
#16
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Joined: Jul 2001
Posts: 1,074
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From: Holland, Mich
I had a 272 with 330's and bravos
had 25 mirages ( quicksilvers) labbed. 67 on speedo, ( 64.5 on gps)
buddy had a powerquest with 25 mirage plus's
we traded one day for a trial.
boat was lazy to get to speed and i did not get any more top end. so I guess the boat did not need the extra prop diameter of teh mirage pluses in the water. ( this opnion is also reinforced by the comments that shorties work good, since less prop is in the the water in their case)
I would lab the props before switching to plus's.
worth the money to get them labbed. ( not by mercury, but by local or one of the guys on the board)
Ramb
edit - read your post wrong
i woudl try the quicksilvers ( smaller diameter) .
per my trial above with a heavier 272
had 25 mirages ( quicksilvers) labbed. 67 on speedo, ( 64.5 on gps)
buddy had a powerquest with 25 mirage plus's
we traded one day for a trial.
boat was lazy to get to speed and i did not get any more top end. so I guess the boat did not need the extra prop diameter of teh mirage pluses in the water. ( this opnion is also reinforced by the comments that shorties work good, since less prop is in the the water in their case)
I would lab the props before switching to plus's.
worth the money to get them labbed. ( not by mercury, but by local or one of the guys on the board)
Ramb
edit - read your post wrong
i woudl try the quicksilvers ( smaller diameter) .
per my trial above with a heavier 272
Last edited by Rambunctious; 05-11-2008 at 08:31 PM.
05-11-2008 | 09:10 PM
#17
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Joined: Mar 2008
Posts: 45
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From: Illinois
I had a 272 with 330's and bravos
had 25 mirages ( quicksilvers) labbed. 67 on speedo, ( 64.5 on gps)
buddy had a powerquest with 25 mirage plus's
we traded one day for a trial.
boat was lazy to get to speed and i did not get any more top end. so I guess the boat did not need the extra prop diameter of teh mirage pluses in the water. ( this opnion is also reinforced by the comments that shorties work good, since less prop is in the the water in their case)
I would lab the props before switching to plus's.
worth the money to get them labbed. ( not by mercury, but by local or one of the guys on the board)
Ramb
edit - read your post wrong
i woudl try the quicksilvers ( smaller diameter) .
per my trial above with a heavier 272
had 25 mirages ( quicksilvers) labbed. 67 on speedo, ( 64.5 on gps)
buddy had a powerquest with 25 mirage plus's
we traded one day for a trial.
boat was lazy to get to speed and i did not get any more top end. so I guess the boat did not need the extra prop diameter of teh mirage pluses in the water. ( this opnion is also reinforced by the comments that shorties work good, since less prop is in the the water in their case)
I would lab the props before switching to plus's.
worth the money to get them labbed. ( not by mercury, but by local or one of the guys on the board)
Ramb
edit - read your post wrong
i woudl try the quicksilvers ( smaller diameter) .
per my trial above with a heavier 272
Any insight on Pro Chargers for the 350mags
06-03-2008 | 07:44 AM
#18
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Joined: Jan 2008
Posts: 307
Likes: 10
From: Reisterstown, MD
272 Performance with small blocks
I previously owned this same boat-1988. With the 250 propHP Mags 1.5 gear ratio and 23 Mirages,it ran exactly 60 MPH @4550-4600 on GPS. When we put in the 350 Mag MPIs and 1.47 gear ratio had to drop pitch to 22 to get in RPM band and did not gain any top end with the 300 HP. We did gain torque and much quicker acceleration.I'm not sure if we needed different props or if the MPIs were overrated? This was a great rough water hull but not the fastest design by todays standards. X dimension may make it tough to go faster?
06-03-2008 | 01:25 PM
#19
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From: Illinois
I previously owned this same boat-1988. With the 250 propHP Mags 1.5 gear ratio and 23 Mirages,it ran exactly 60 MPH @4550-4600 on GPS. When we put in the 350 Mag MPIs and 1.47 gear ratio had to drop pitch to 22 to get in RPM band and did not gain any top end with the 300 HP. We did gain torque and much quicker acceleration.I'm not sure if we needed different props or if the MPIs were overrated? This was a great rough water hull but not the fastest design by todays standards. X dimension may make it tough to go faster?
Thanks Pat I was wondering what diffeerence MPI would have on it... I'll prob just stick with pro charging them, if I do anything at all... For now I'm happy with solid overall performance and good reliability.
