Like Tree1Likes

496 HO - Remove Turbulator and Lost Speed?

Reply
Old 08-21-2009, 08:14 AM
  #21
Registered
 
Join Date: Jul 2006
Location: Seabrook, Tx
My Boats: 2005 42' EX //twin 525's
Posts: 881
Default

If you do take the risers out and remove the turbulators, take a little bit of time and remove the black paint off the SS and buff them out, they look great polished.
gerritm is offline  
Reply With Quote
Old 08-21-2009, 11:27 AM
  #22
Registered
Thread Starter
 
Join Date: May 2007
Location: Woodinville, WA
My Boats: 08' 28 Daytona
Posts: 231
Default

Quote:
Originally Posted by Raylar View Post
If you are boating in salt water or your boat sits in the water a lot DON'T REMOVE THE TURBULATORS! ,the stock steel valve and seats will rust! If you removed turbulators on stock 496's and lost power or speed, something else is wrong. Suggestion- get a fuel pressure guage and read your fuel pressure at speed with the vacume line disconnected at the fuel pressure regulator, if the fuel pressure drops below 40-41 psi under full throttle you have got a fuel delivery issue and that will turn of power quickly and you will loose speed. We have found at Raylar that most guys now with the newer 496's with the newer CoolFuel Merc assemblies forget to service the filters and water disc in the CoolFuel housing and the result can be catistrophic!! Also some boat builders and riggers were installing small size restrictive anti-siphon valves on the fuel tanks and small diameter 3/8" hoose fitting and sometimes crazy fuel line routings and really creating power loss problems for 496's. You turbulators in and out are not your problem, look else where!

Best Regards,
Ray @ Raylar
Got it. Thanks for the advice!
CheckedOut is offline  
Reply With Quote
Old 10-13-2009, 04:40 PM
  #23
Gold Member
Gold Member
 
neva satisfied's Avatar
 
Join Date: Aug 2005
Location: Maine
My Boats: Donzi
Posts: 340
Default

Has anyone thought of or tried taking the turbulators out and increasing the opening by either drilling or cutting the opening bigger? Then reinstalling them. This in theory should give you a bigger opening and maybe even protection from water getting to the valves. Anyone have thoughts on this?
neva satisfied is offline  
Reply With Quote
Old 10-14-2009, 08:26 AM
  #24
Registered
 
Join Date: Jan 2007
Posts: 534
Default

For a 8HP gain it's nowhere near worth the risk of moisture issues. It's a great stock engine designed to be a very reliable package, save your money and time and put it away for a blue engine someday. I'd walk away from a great deal on a 496 equipped boat if I seen it at all messed with, including one where aftermarket maifolds or headers were added. Just asking for troubles IMO.
ZP'd is offline  
Reply With Quote
Old 10-14-2009, 12:06 PM
  #25
Registered
 
Back4More's Avatar
 
Join Date: Feb 2002
Location: Lake Michigan
My Boats: 353 Fastech
Posts: 6,624
Default

Whipple it
http://www.whipplesuperchargers.com/...sp?ProdID=1149

Last edited by Back4More; 10-14-2009 at 12:08 PM.
Back4More is offline  
Reply With Quote
Old 10-14-2009, 12:41 PM
  #26
Registered
 
Join Date: Jan 2004
Location: San Diego, California
Posts: 2,777
Wink Cost versus Benefit Comparison

I would just like to add that there are littlerly hundreds, at last count about 700plus 496's out there running Raylar 103 kits since 2003 including quite a few Eliminator Daytonas all with great results and great long life reliability. It always amazes me when non 496 owners call out such negative opinions on 496's verus other options. Raylar has done many brand new 496 upgrades for actual boat builders on new Merc 496's such as Sunsation, Eliminator, etc. and there are always fantastic results with big performance increases for very resonable costs versus blue engines. Raylar completed two for a 32 Sunsation that with stock 496's with Raylar 103 kits and STOCK EXHAUST ran 96 miles per hour at LOTO this year whcih by the way is about 1-2 mph faster than the same boat with HP525efi's ran, Go Figure?
If you've got about $45K to $50K for twins to convert your boat to blue racing engines, be my guest, they are very nice engines.
If you've got 496's in your boat and you want the most affordable, non-supercharged, reliable bang for the BUCK! there is no substitute doller for doller than Raylar Upgrades.

Best Regards,
Ray @ Raylar
Raylar is offline  
Reply With Quote
Old 04-27-2010, 06:58 PM
  #27
Registered
Thread Starter
 
Join Date: May 2007
Location: Woodinville, WA
My Boats: 08' 28 Daytona
Posts: 231
Default

Quote:
Originally Posted by neva satisfied View Post
Has anyone thought of or tried taking the turbulators out and increasing the opening by either drilling or cutting the opening bigger? Then reinstalling them. This in theory should give you a bigger opening and maybe even protection from water getting to the valves. Anyone have thoughts on this?
The way that the turbulators are designed you would have to machine the lip out on a lathe or use a grinder and render them useless. I suppose you could drill the lip, but it might mess with the airflow. Hard to say without testing.

I read somewhere that you can port the stock manifolds. Seems like a lot of work to me for a few HP, but it is possible.
CheckedOut is offline  
Reply With Quote
Old 04-27-2010, 07:01 PM
  #28
Registered
Thread Starter
 
Join Date: May 2007
Location: Woodinville, WA
My Boats: 08' 28 Daytona
Posts: 231
Default

Quote:
Originally Posted by Raylar View Post
Raylar completed two for a 32 Sunsation that with stock 496's with Raylar 103 kits and STOCK EXHAUST ran 96 miles per hour at LOTO this year whcih by the way is about 1-2 mph faster than the same boat with HP525efi's ran, Go Figure?
Not surprised. Gabe (from the Seattle area) picked up 40 mph on his 25 eliminator going from a stock 496 to one of your motors with the whipple kit. The cost seems up there though.
CheckedOut 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 09:55 PM.


Copyright 2011 OffShoreOnly. All rights reserved.