Thread: Milling Stock Head
08-23-2014, 10:51 AM #1
- Join Date
- Oct 2013
- West Central Florida
Milling Stock Head
Does anyone know how much a stock 66V cylinder head can be milled and still run 93 pump gas? How much milling equals what compression PSI?
08-23-2014, 12:38 PM #2
I don't think it is as easy as just taking some metal off, I think the domes need to be reshaped as well. Get a hold of Jim's Performance on here and have him do it, its like 100 bucks. He is located in the palm harbor area I believe.
08-23-2014, 03:56 PM #3
- Join Date
- Aug 2006
Its around .050 or so, but you do have to recut the squish bands so it is well worth sending it to someone who knows how to do it. A knowledgeable machinist also knows a better squish angle versus the stock one which really is not the best.
You can run up to around 145-150 psi on 93 octane fuel, I have several boats in the family that run that compression and use 93 oct.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By TuningForkMarine in forum Yamaha PWC Performance (2-stroke)Replies: 3Last Post: 10-10-2013, 07:43 AM
By Hockey369 in forum Yamaha ClassifiedsReplies: 3Last Post: 05-14-2011, 08:38 PM
By o uncola o in forum Yamaha PWC Performance (2-stroke)Replies: 3Last Post: 02-14-2009, 01:43 PM
By o uncola o in forum Yamaha PWC Performance (2-stroke)Replies: 16Last Post: 09-29-2008, 04:44 PM
By Chrisrokc in forum Yamaha PWC Performance (2-stroke)Replies: 12Last Post: 07-10-2007, 08:40 AM