Like Tree0Likes

Engine exhaust question

Reply
Old 12-12-2006, 02:07 PM
  #11
Registered
 
Join Date: Feb 2004
Location: MT. JULIET, TN.
My Boats: '99 33 Outlaw HP 500's,
Posts: 3,698
Default Re: Engine exhaust question

Quote:
Originally Posted by AIR TIME
Let see those lightnings after 12yrs and I run a 509 with a 1050 nickerson mine breathes fine with the s/m and my buddy has 502 built runs all my old stuff with cmi's in his 24super boat but i still kill himon the top end boats are with in a 1,000lbs and i have alittle more hp better drive my b1 shortie his trs. he thought the cmis were going to put him over the top. and I know he will not get 12yrs out of his cmis,we only run sea water or near one riverbut still sea water. if you are in the lakes only the lightings might be the way to go, but if you see any salt water get the S/M..
I wouldn't run lightnings in seawater either. I thought he meant stock cast iron manifolds. No way they breath better than a header.
kennyo is offline  
Reply With Quote
Old 12-12-2006, 02:40 PM
  #12
Platinum Member
Platinum Member
Thread Starter
 
Hollowpoint's Avatar
 
Join Date: Nov 2006
Location: Va Beach, VA
My Boats: 1988 Cigarette Bullet
Posts: 708
Default Re: Engine exhaust question

The drive is a whole other issue. The boat is a Chris Craft 222 Stinger with a single engine with an Alpha drive. Originally, it had a 350 Magnum. I've been told that a Bravo is a direct bolt up to replace an Alpha. I can't afford that right now, so I'm sticking with the Alpha.

Playing with cams and settings (like 1.6 rockers vice 1.5) on the computer simulation, it looks like I can expect 410 to 450hp while still having the torque down low to push the boat out of the hole. I'm running a 25 pitch Hydromotive prop with a nosecone so getting on plane with a full tank and people is a slight problem.

I'm hoping the Alpha stays together.

Boat is run 75% in fresh and 25% in salt water and is always flushed after use. I'm leaning either to the S/M or the Lightning headers.
Hollowpoint is offline  
Reply With Quote
Old 12-12-2006, 05:56 PM
  #13
Registered
 
dave911's Avatar
 
Join Date: Dec 2003
Location: SoCal
My Boats: SOLD! 1991 Sutphen 26' Rum Runner
Posts: 883
Default Re: Engine exhaust question

Nothing wrong with a Stinger, but I'd seriously consider upgrading the boat before throwing in a bunch of motor work and then a new bravo. Let someone else take the hit.

From what I hear, 400hp is about the max you wanna run in an Alpha...no airtime, hope she runs cool enough, and baby it out of the hole if you want it to hold together.

Good luck.
dave911 is offline  
Reply With Quote
Old 12-12-2006, 08:30 PM
  #14
Registered
 
Too Old's Avatar
 
Join Date: Oct 2000
Posts: 2,713
Default Re: Engine exhaust question

All of the exhaust systems you mentioned are decent.

I'd offer this form the Stainless Marine website.......

We believe that the HI-TORQUE Manifold System is the best combination of horsepower increase, weight reduction and long life available in the entire marine industry today. The heaviest HI-TORQUE manifold weighs 23 pounds. Compare that to cast iron! Experience has shown that our 5 year limited warranty is justified. Our exclusive hybrid aluminum construction has been so sucessful that, in more than 10 years, we have yet to hear of an engine ruined by the failure of a HI-TORQUE MANIFOLD. Best of all, HI-TORQUE exhaust systems are priced lower than most other top level exhaust systems.

Just something to consider.
Too Old is offline  
Reply With Quote
Old 12-12-2006, 09:43 PM
  #15
JC Performance Engines
Gold Member
 
Stormrider's Avatar
 
Join Date: Jul 2002
Location: Long Island, NY
My Boats: 2003 28 Pantera - SOLD
Posts: 8,810
Default Re: Engine exhaust question

hey fred, you used that same line on me.
Stormrider is offline  
Reply With Quote
Old 12-12-2006, 10:12 PM
  #16
Registered
 
Too Old's Avatar
 
Join Date: Oct 2000
Posts: 2,713
Default Re: Engine exhaust question

Quote:
Originally Posted by Stormrider
hey fred, you used that same line on me.
Did it work????
Too Old is offline  
Reply With Quote
Old 12-12-2006, 10:18 PM
  #17
Registered
 
Titan's Avatar
 
Join Date: Oct 2002
Location: Mill Neck, NY
My Boats: 33 Stratos, Sweet 16 Donzi
Posts: 2,275
Default Re: Engine exhaust question

CMI was my choice. Fred helped me out from start to finish with my custom Big Elbow Race Header System.. Thanks again Fred..... They sound awsome
Titan is offline  
Reply With Quote
Old 12-12-2006, 10:22 PM
  #18
Registered
 
Too Old's Avatar
 
Join Date: Oct 2000
Posts: 2,713
Default Re: Engine exhaust question

Quote:
Originally Posted by Titan
CMI was my choice. Fred helped me out from start to finish with my custom Big Elbow Race Header System.. Thanks again Fred..... They sound awsome
My pleasure!!!
Too Old is offline  
Reply With Quote
Old 12-12-2006, 10:40 PM
  #19
Registered
 
AIR TIME's Avatar
 
Join Date: Dec 2000
Location: EASTON MA.
My Boats: BAJA OL 650HP/ SABER 28 Gellner unlimited with konrad ace
Posts: 6,281
Default Re: Engine exhaust question

Quote:
Originally Posted by kennyo
I wouldn't run lightnings in seawater either. I thought he meant stock cast iron manifolds. No way they breath better than a header.
yeap on bobs dyno he had both done and said he lost tq with the cmis and did not gain any speed going to the cmi. with his a class motor . and its running nice for me nice 94 and sound pissa dry
AIR TIME is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cbeastwood
Trucks, Trailers and Transportation
3
07-12-2007 12:30 PM
chrisf
General Boating Discussion
3
01-14-2006 02:04 PM
CC247
General Q & A
10
09-15-2005 03:54 PM
dcrighton
General Boating Discussion
7
03-15-2004 12:05 AM



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 05:26 PM.


Copyright 2011 OffShoreOnly. All rights reserved.