I got a new head

[DaUpJetSkier]

http://www.pwctoday.com/classifieds/showproduct.php?product=2702&cat=4
I just got this head and I need some info on what I should watch out for and any other info you got on it and my application.
Im gonna put it on my 93 650, engine is all stock right now. Now, I want to get a stock size head gasket right. Wheres the best cheapest place to get one? Do I need to adjust the carbs? Any break in necessary? i'll definately run 93 octane but anything else I should watch out for? Is a compression check necessary before I ride? thanks

 

[unclehulka13]

one of those domes is messed up. i personally wouldnt run it.

 

[douglee25]

one of those domes is messed up. i personally wouldnt run it.

The head isn't that bad. I would buff out those little pits though to avoid any hot spots. Hot spots can lead to detonation. You can use a dremel to buff them down with a sanding disk.

Doug

 

[DaUpJetSkier]

ya I wasnt too worried about those detonation marks but I will buff them as much as possible. What else should I worry about or do?

 

[unclehulka13]

make sure your motor isnt all worn out. 185psi on a worn out motor is a good way to ******** something up.

 

[DaUpJetSkier]

ya I guess a 16 yr old motor is exactly as tight as it use to be. Well Ill run it for this season and I plan on looking for a 701 to build next year. The engine runs great now and has no signs of major wear but i'll see when I take the head off.

 

[sflsurfrider]

i have a riva girdled head that has a pitted dome like that one. ive been running it for about 2 years w/o a single problem.

 

[njfl]

Oops. I deleted the listing on PWCT because it was sold. Here are the pics again. Joe.

 

[Phill]

whats with the swirl marks on the domes?

 

[douglee25]

I'm sure the company claims it tries to initiate a cyclonic action to the fuel air mixture for a better burn. Of course it doesn't work. Just a guess:biggthumpup:

Doug

 

[Mouthfulloflake]

ive seen a few heads cut like that, I think some have been posted as done by TLR maybe?

 

[Mark44]

No carb adjustment is necessary but you do need to check your squish angle and check compression to see where you are at. You can get a head gasket from jet ski soluitions or just about any place.

Mark44

 

[DaUpJetSkier]

k thanks, I know how to check squish by that thread a while back, but what do I look for when I check it. What kind of measuring device do I need?

 

[Mark44]

You can use a dial caliper or micrometer to measure the solder after it has been squished. You are looking for .050 squish.

Mark44

 

[Mouthfulloflake]

vernier caliper, something that can accuratly measure into the thousandths of an inch.

here is a cheap one.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47257

and if you happen to get one without a dial, this is a handy little java applet to read the scale.

http://members.shaw.ca/ron.blond/Vern.APPLET/index.html

 

[Mark44]

t

vernier caliper, something that can accuratly measure into the thousandths of an inch.

here is a cheap one.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=47257

Yes what Mouth said.:biggthumpup:

Mark44

 

[sflsurfrider]

thats the caliper i have. its okay for the money. get what ya pay for.

 

[DaUpJetSkier]

so .50, any smaller and its too high, what happens? Larger then what? If im going to run 93, the very max is about 180-190 psi. If its around there and 93 doesnt cut it, how do I know how much vp to run.

 

[sflsurfrider]

youre okay with .040" squish if youre not a WOT'er.

if the squish is to small, the piston crowns MAY hit the domes due to the rods stretching at high rpms.

if your psi is 180-190, you wont need VP

 

[Maico]

I'm sure the company claims it tries to initiate a cyclonic action to the fuel air mixture for a better burn. Of course it doesn't work. Just a guess:biggthumpup:

Doug

Talk to Ken Klus...the CEO of Ocean Pro and chief engineer of the swirl dome technology heads.