Wondering how to post images or maybe change your avatar or maybe something else?
You can find that and a lot of other useful tips for using the forums in the HydrostreamForums Knowledge Base.
To visit the HydrostreamForums Knowledge Base CLICK HERE
You can find that and a lot of other useful tips for using the forums in the HydrostreamForums Knowledge Base.
To visit the HydrostreamForums Knowledge Base CLICK HERE
gt 150
-
- Getting my feet wet
- Posts: 52
- Joined: Mar 10, 2011 5:46 pm
- Location: orange park florida
- Contact:
gt 150
how much more power can be gained by shaving the heads and how much to take off motor is 1990 johnson gt 150
-
- Hydrostream Addict
- Posts: 418
- Joined: Jun 22, 2010 5:22 pm
- Location: hohenwald, tn
- Contact:
Re: gt 150
well highe compression is acheived by shaving the heads there for causing a faster stroke thus for more rpms=mph i think this is correct but depends on how much u cut off is what kinda fuel you will have to run and longjevity of your motor comes into play can the crank rods and pistons hold up to the higher compression head gaskets blowing bearing wearing out this all comes into a factor maybe some more guys can chim in on this also hope this helped some but told hp gained varrys
79 vector missing in action!!!!!
2006 vking center steer
2006 vking center steer
-
- Hydrostream Addict
- Posts: 301
- Joined: May 17, 2009 5:42 am
- Location: Galway, NY
- Has thanked: 1 time
- Contact:
Re: gt 150
The best person to answer your specific question would be EMDSAPMGR on ScreamandFly.com He, Harley Stipp, has a publication on how to mod out the older OMC's "Improving Crossflow Performance 5th Ed". I have a copy and it is great. If yours is a looper I imagine some of this (like shaving the heads) would apply as well.
In general, raising the compression should really not effect the power band much, however it does improve the efficiency and power output.
Here is a good link on the topic: http://www.bridgestonemotorcycle.com/documents/higher_compression6.pdf
Also, grab or borrow a copy of Gordon Blair's book: "Design and Simulation of Two Stroke Engines"
http://books.sae.org/book-r-161
In general, raising the compression should really not effect the power band much, however it does improve the efficiency and power output.
Here is a good link on the topic: http://www.bridgestonemotorcycle.com/documents/higher_compression6.pdf
Also, grab or borrow a copy of Gordon Blair's book: "Design and Simulation of Two Stroke Engines"
http://books.sae.org/book-r-161
-
- Random Topics
- Replies
- Views
- Last post
-
- 30Replies
- 12383 Views
- Last post by Hippie459MN
Apr 16, 2012 10:08 pm
-
- 5Replies
- 3213 Views
- Last post by 79ViperInProgress
Apr 12, 2012 10:16 pm
-
- 5Replies
- 3218 Views
- Last post by Hippie459MN
Apr 12, 2012 9:28 pm
-
- 9Replies
- 9191 Views
- Last post by JUPITER VALERO
May 21, 2012 11:06 am
-
- 9Replies
- 11920 Views
- Last post by Hippie459MN
Jan 01, 2015 11:15 pm
Who is online
Users browsing this forum: No registered users and 44 guests