Will thru-hull exhaust help performance?
#1
Registered
Thread Starter
Join Date: May 2001
Location: Chesapeake Bay
Posts: 798
Likes: 0
Received 0 Likes
on
0 Posts
Will thru-hull exhaust help performance?
I'm looking at a Rinker family runabout for water skiing and tubing to keep my go-fast boat company. I want to get the the 496Mag engine and I'm wondering how much more performance, if any, I can expect by opting for the Captain's Call thru-hull exhaust vs thru-prop. I know the sound alone should be good for 3-4 mph... .
#2
Gold Member
Gold Member
Not sure about the noise vs (perceived) speed, but any time you relieve exhaust back pressure you'll see a difference.
You could go to a Captians Call type and have the best of both worlds. Quiet around the dock and open pipes for running.
With the current trend towards noise restrictions I'd look into mufflers too.
BTW I had a Fiat 850 that at 6000 rpm in second gear it sounded like it was going 90 mph. Looked at the speedometer and all I was doing was 30 mph.
Sound vs perceived speed.
You could go to a Captians Call type and have the best of both worlds. Quiet around the dock and open pipes for running.
With the current trend towards noise restrictions I'd look into mufflers too.
BTW I had a Fiat 850 that at 6000 rpm in second gear it sounded like it was going 90 mph. Looked at the speedometer and all I was doing was 30 mph.
Sound vs perceived speed.
#3
Platinum Member
Platinum Member
Join Date: Oct 2002
Location: DFW, Texas
Posts: 1,053
Likes: 0
Received 0 Likes
on
0 Posts
In my opinion, if you're talking about the 375HP 496 you may not see any performance difference IF, you're talking about a Bravo with the open, short tube type exhaust bellows. I understand that some (or maybe it was older ones), had a full bellows into the lower and that might be a restriction starting at around 350 HP. The open tube type supposedly is good up to about 400HP. That may be why the HO includes thru hull exhaust, because the thru drive can't properly support 425 HP.
So there's an opinion that may not hold water but I gave it a shot.
So there's an opinion that may not hold water but I gave it a shot.
#4
Gold Member
Gold Member
Join Date: Oct 2001
Location: Haslet, TX,USA
Posts: 1,936
Likes: 0
Received 0 Likes
on
0 Posts
Let me know,if you don't mind what boat and how much, a freind of mine has been a rinker dealer for many years, mabye I can help you with a bargining price
#5
Charter Member
Charter Member
If the chip is not reprogrammed for open exhaust it may actually slow down and/or damage the engine due to lean out. Might want to check with Mercruiser. OTOH the 496 HO must have open exhaust to work properly and maintain warranty.
#6
Registered
Thread Starter
Join Date: May 2001
Location: Chesapeake Bay
Posts: 798
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the insight. The outdrive would be a Bravo 3 on this application. The thru-hull would exit just above the chines on the side and be factory installed.
Sounds like with the regular 496 mag, thru-hull won't buy you much.
Sounds like with the regular 496 mag, thru-hull won't buy you much.
#8
Registered
Thread Starter
Join Date: May 2001
Location: Chesapeake Bay
Posts: 798
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by liquid asset
Let me know,if you don't mind what boat and how much, a freind of mine has been a rinker dealer for many years, mabye I can help you with a bargining price
Let me know,if you don't mind what boat and how much, a freind of mine has been a rinker dealer for many years, mabye I can help you with a bargining price
The boat we're looking at is a Rinker Captiva 282. The one we saw at the Chesapeake boat show last month had the 6.2 MPI, no trailer and they wanted about $49K plus tax and transportation.
We don't have a price for one with the 496 Mag upgrade.
Thanks,
#9
Guest
Posts: n/a
Originally posted by seanclong
... The outdrive would be a Bravo 3 on this application...
... The outdrive would be a Bravo 3 on this application...
#10
Charter Member #1171
Charter Member
the problem with through hull on a rinker is they dont have room to go straight ou the back,,, they do a side exit and all the bends are going to steal alot of what you would gain.
__________________
I want to live in a world where a chicken can cross the road and not have its motives questioned.
I want to live in a world where a chicken can cross the road and not have its motives questioned.