Like Tree3Likes

Baja 272 454MPI (310 hp) Prop

Reply
Old 09-26-2017, 07:38 AM
  #11
Registered
 
Join Date: Apr 2014
Posts: 1,239
Default

Dallas, If you are interested in a Mirage 21 (non +) I have one in very nice condition, solid hub that I would sell for $150 (plus shipping from Houston).
GLENAMY 242SS is offline  
Reply With Quote
Old 09-26-2017, 08:04 PM
  #12
Registered
Thread Starter
 
Join Date: Oct 2016
Location: Dallas TX
My Boats: 2000 BAJA 272
Posts: 54
Default

Quote:
Originally Posted by GLENAMY 242SS View Post
Dallas, If you are interested in a Mirage 21 (non +) I have one in very nice condition, solid hub that I would sell for $150 (plus shipping from Houston).
Hmm.. What to Y'all think of this deal? Not the cost or anything.. but the Mirage 21 would have less cupping so it would spin a little higher RPM.. Would it be too much rpm?
DallasBAJA is offline  
Reply With Quote
Old 09-26-2017, 09:24 PM
  #13
VIP Member
VIP Member
 
VoodooRob's Avatar
 
Join Date: Jul 2011
Location: Cleveland Ohio
My Boats: 07 Fountain 38 Lightning600SCI
Posts: 1,588
Default

I would lean more to Mirage +, they worked out best on past boats for us. 272 Baja and 223 Powerquest, both had same hp as your boat.
DallasBAJA likes this.
VoodooRob is offline  
Reply With Quote
Old 09-27-2017, 04:24 AM
  #14
Registered
 
Join Date: Feb 2012
Location: westville, NJ
My Boats: 1967 34 Hatteras summer house. 2000 Crownline 248ccr her boat. 79 Pantera 24 Sport.
Posts: 3,845
Default

Ok, this is a SINGLE 310 hp 454? At 20 inches pitch, 2 inches is 10% diff. You are hitting 3900. 21 (Lil less than 10% change from 23) will get you to 4250 or so. A 20 bravo would get you more around 4500. A 19 closer to 4700.


​​​​



​​
dereknkathy is offline  
Reply With Quote
Old 09-27-2017, 04:31 AM
  #15
Charter Member #1171
Charter Member
 
obnoxus's Avatar
 
Join Date: Feb 2001
Location: New Lenox , Il
My Boats: 2000 36 OUTLAW SOLD SHOPPING
Posts: 3,909
Default

Tried a 4 blade Bravo on my 272. It hated it. Not enough bow lift

Tune a M/P to your needs with a good prop shop. It was the best I found for mine back in the day.
__________________
IF YOUR UNDER CONTROL,,,,,YOUR NOT GOING FAST ENOUGH !!!!
obnoxus is offline  
Reply With Quote
Old 09-27-2017, 04:42 AM
  #16
Registered
 
Join Date: Feb 2012
Location: westville, NJ
My Boats: 1967 34 Hatteras summer house. 2000 Crownline 248ccr her boat. 79 Pantera 24 Sport.
Posts: 3,845
Default

Also, if you can't hit 4k at WOT, don't try. Engine is overloaded and could pop a head gasket. It is a performance boat hull. So you expect fast. But it has a sea ray sundancer engine in it. Cam-intake-exhausts should get 400 out of it fairly easy...in the mean time, there are 19 and 21 props all over ebay under 100 bucks. Alum, but...

Last edited by dereknkathy; 09-27-2017 at 04:45 AM.
dereknkathy is offline  
Reply With Quote
Old 09-27-2017, 12:19 PM
  #17
Registered
Trade Score: (2)
 
Join Date: Oct 2012
Location: dfw texas
My Boats: 77 tahiti squirt boat
Posts: 1,290
Default

Had a 252 islander with a 7.4mpi gen 6 , it had one of those mirage 23 on it also. Had to bury the throttle to get on plane with a good load of people and gas ,but it would eventually pull 44-4600 rpm , my 272 with a 502 mag pulls the 23+ to 5100 rpm , slight chop light load ect ect,
You might have a missing cyl or some low fuel pressure , or your tach just reads low
airjunky is offline  
Reply With Quote
Old 09-27-2017, 01:20 PM
  #18
Registered
Thread Starter
 
Join Date: Oct 2016
Location: Dallas TX
My Boats: 2000 BAJA 272
Posts: 54
Default

Quote:
Originally Posted by airjunky View Post
Had a 252 islander with a 7.4mpi gen 6 , it had one of those mirage 23 on it also. Had to bury the throttle to get on plane with a good load of people and gas ,but it would eventually pull 44-4600 rpm , my 272 with a 502 mag pulls the 23+ to 5100 rpm , slight chop light load ect ect,
You might have a missing cyl or some low fuel pressure , or your tach just reads low
It gets on plane pretty easy and sounds healthy. I feel like if it was missing a cylinder or something along the lines of that I wouldnt hit the MPH im hitting. I would also think I would be able to tell if a cylinder was missing while running.. Maybe the RPM gauge is just off like others have said... Is the only way to tell what the RPM is to hook up a scan tool?
DallasBAJA is offline  
Reply With Quote
Old 09-27-2017, 01:38 PM
  #19
Offshoreonly Advertiser
Offshoreonly Advertiser
 
bbladesprops's Avatar
 
Join Date: Jun 2003
Location: Princeton, Wisconsin
Posts: 3,700
Default

Quote:
Originally Posted by DallasBAJA View Post
It gets on plane pretty easy and sounds healthy. I feel like if it was missing a cylinder or something along the lines of that I wouldnt hit the MPH im hitting. I would also think I would be able to tell if a cylinder was missing while running.. Maybe the RPM gauge is just off like others have said... Is the only way to tell what the RPM is to hook up a scan tool?

You can purchase cheap inductive tachs to compare your tach against.
Also, we can supply you with M+21's to test with through our test program if you desire.

Brett
SB likes this.
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
bbladesprops is offline  
Reply With Quote
Old 09-27-2017, 02:06 PM
  #20
Registered
 
Join Date: Jun 2011
Posts: 782
Default

Quote:
Originally Posted by DallasBAJA View Post
It gets on plane pretty easy and sounds healthy. I feel like if it was missing a cylinder or something along the lines of that I wouldnt hit the MPH im hitting. I would also think I would be able to tell if a cylinder was missing while running.. Maybe the RPM gauge is just off like others have said... Is the only way to tell what the RPM is to hook up a scan tool?
You are trying to troubleshoot too hard. You have too much prop right now. Switch to a 21" Mirage Plus and THEN see what happens. This is the easiest and quickest step. Make sure you are using a good GPS source for your steady state speed measurements.
DallasBAJA likes this.
Trash is offline  
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:52 AM.


Copyright 2011 OffShoreOnly. All rights reserved.