Like Tree0Likes

Question about flame arrestors and air intake?

Reply
Old 08-30-2002, 09:18 PM
  #1
KN
Registered
Thread Starter
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Question Question about flame arrestors and air intake?

Is there any way to test if you are getting enough air through your flame arrestor? I have twins 496 Mag HO's, they are so tight in the engine compartment I wonder if they get enough air.
The back seat is 1/2 inch in front or the flame arrestor. And the hatch is practically down on top of the plastic engine cover. Which also seems to restict air to the flame arrestor. I was thinking installing a K&N filter ( do these meet Coast Guard requirements ) And removing the plastic engine cover.
Has any one installed a K&N on a 496 Mag HO? If so what were the results.

Thanks Kirk
KN is offline  
Reply With Quote
Old 08-30-2002, 09:36 PM
  #2
Registered
 
rjcardinal's Avatar
 
Join Date: Jan 2001
Location: Baton Rouge, LA
My Boats: '99 27 Fountain Fever
Posts: 1,070
Default

Im not sure on the new 496 but on the 454 and 502 EFI Mags the K&N filter provided little gains. I put one on my boat and saw no real gain. Not enough to see on the speedo on a V bottom. One area people have seen gains with is more air into the engine compartment. Several people have said that raising their engine hatch 1 inch when at WOT would give them another 100 rpm and a coouple of mph. I think the gains come from lowering the intake air temp.

What kind of boat do you have? Some boats engine compartments breathe better than others.

Ron
rjcardinal is offline  
Reply With Quote
Old 08-30-2002, 10:03 PM
  #3
KN
Registered
Thread Starter
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Default

Ron I have a Sunsation, I actually was going to try to run it with the engine hatch open a little to see what happens. The back seat is part of the hatch, so I don't know how much air will get in their. But it will be worth a try, as long as no one is stting in the back

Kirk
KN is offline  
Reply With Quote
Old 08-30-2002, 10:17 PM
  #4
Member #154
Platinum Member
 
Indy's Avatar
 
Join Date: Oct 2000
Location: SW CT & Long Island Sound
My Boats: Missing my PowerPlay
Posts: 6,756
Default

I know somebody that put in the K&N in his single 496HO and saw no gains. It got rid of the whining noise though and he thinks it sounds a little throatier.
Indy is offline  
Reply With Quote
Old 08-30-2002, 10:30 PM
  #5
KN
Registered
Thread Starter
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Default

Here's a picture of the seat and rear hatch.
Attached Thumbnails
Question about flame arrestors and air intake?-engine-hatch-seat.jpg  
KN is offline  
Reply With Quote
Old 08-31-2002, 12:27 AM
  #6
CBPBA's Walmart Greeter
VIP Member
 
Keith's Avatar
 
Join Date: Feb 2001
Location: Pasadena, MD
My Boats: Formula 370 Super Sport
Posts: 861
Default

Installed EMI's on 454mags, no noticeable gain. There is a difference between auto and marine. Make sure you get the USCG certified version, it's usually stamped into the rubber and costs a bit more.
__________________
K2

-----------------------------------------

CHESAPEAKE BAY POWER BOAT ASSOCIATION
'http://www.cbpba.com'

"Experience is something you don't have until just after you need it."
Keith is offline  
Reply With Quote
Old 08-31-2002, 01:33 AM
  #7
AT Cult Member #3
VIP Member
 
R Addiction's Avatar
 
Join Date: Oct 2000
Location: Pa.
My Boats: '99 Active Thunder Tantrum
Posts: 20,687
Default

Got a K&N on my '99 502 mag. No noticable gain but it looks Cool!!!
R Addiction is offline  
Reply With Quote
Old 09-01-2002, 05:56 AM
  #8
aussie
Guest
 
Posts: n/a
Default

Hey KN,
I have twin 496HO's & fitted the K&Ns, a bit less soot, sounds heaps better, no real power gains, just try running with the hatch jammed open a bit & see what happens, more air can't hurt !!!
 
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
unbroken
General Q & A
7
12-04-2006 06:51 PM
nothinbut trouble
Formula
3
01-22-2006 09:12 PM
blown formula
General Q & A
0
03-29-2005 12:15 AM
Dean Ferry
General Boating Discussion
8
03-03-2005 08:28 AM
fountain525sc
General Boating Discussion
26
06-29-2004 08:41 PM



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 12:06 AM.


Copyright 2011 OffShoreOnly. All rights reserved.