Mag To Ho
#1
Registered
Thread Starter
Join Date: May 2010
Posts: 91
Likes: 0
Received 0 Likes
on
0 Posts
Mag To Ho
HI back in 2002 i put a HO cam and ecu on my 2001 MAG.lately i read somewere that i habe to drill the hole in the throttle plate to make it bigger,anyone know the size of the hole i have to drill.thanks
#3
Gold Member
Gold Member
#4
Registered
Join Date: Mar 2009
Posts: 496
Likes: 0
Received 0 Likes
on
0 Posts
So did you see any speed gains after the upgrades were finalized ???
Did you end up needing to drill the hole?
http://www.offshoreonly.com/forums/g...onversion.html
Did you end up needing to drill the hole?
http://www.offshoreonly.com/forums/g...onversion.html
#5
Registered
iTrader: (1)
So did you see any speed gains after the upgrades were finalized ???
Did you end up needing to drill the hole?
http://www.offshoreonly.com/forums/g...onversion.html
Did you end up needing to drill the hole?
http://www.offshoreonly.com/forums/g...onversion.html
boat was a twin step 30'...best I was able to get before updates was 73.9 on gps after update first time out it hit 78.4 on gps,,but props would only spin 4800 rpm,once I had props reworked and was able to hit 4950 rpm I saw 80.2 on gps..
#6
Registered
Join Date: Mar 2009
Posts: 496
Likes: 0
Received 0 Likes
on
0 Posts
I'd say it was worth doing it then. Thanks.
#8
Registered
Thread Starter
Join Date: May 2010
Posts: 91
Likes: 0
Received 0 Likes
on
0 Posts
#9
Registered
Join Date: Jan 2004
Location: San Diego, California
Posts: 2,777
Likes: 0
Received 6 Likes
on
6 Posts
496 HO uses more air at idle than a 496 MAG and opening the throttle plate by-pass hole larger to 1/4"-5/16" stops the idle air motor from working so hard to stabilize the idle and allows the idle air motor counts to return to zero which tends to stabilize the idle at a more constant rpm. Its also sometimes necessary to adjust the throttle stop screw and generally open the throttle blade so the TPS voltage is between .62 and .68 volts on the scan tool.
Best Regards,
Ray @ Raylar
Best Regards,
Ray @ Raylar