Blaster High compression head?

[Heelz23]

Going to put on a jetmaniac head this weekend.


I looked at the directions and they seem pretty straight forward however I do have a couple of questions.

After I take the old head off, I will be putting the domes on first, then the head itself, is that correct? What kind of grease do you use to keep the orings in?

I will also be taking the bolts out of the case and putting in the rods, it says use a stud something but then just states to tighten the bottom threads until they stop, so do I need a special tool for this?

I am guessing you use locktite on all the bolts?

Do you use teflon tape on the water outlets?

Can you look at the pics below just to be sure the orings are good?

This head has two outlets, please look and let me know how, where the second one should go.

 

[Draggingto]

I usually put the plugs in to hold the domes and shell toghether and put it all on as one peice. I just use some lite grease. doesnt have to be any special kind.

There is a tool that wil tighten the studs in first. A lot of people just do it with the nuts that go on top, but thats not really the correct way, but it will work in a pinch.

I use blue loctite

Yes tape or goop on the outlets.

One outlet should go directly out to a pisser. The other should T off and half go to your pipe and the other to a pisser.

 

[BMWtech]

Pic looks good, make sure not to pinch the o-rings when installing.

Run the ski on the hose to make sure that hasn't happened before you take it out on the water. Re-torque after your first ride to make sure everything is still tight. Loc-tite is optional, many of us don't use it. Put a little grease in the acorn nuts. I also like to put 1211 at the bottom of the girdle bolts where they go through the cylinder to keep salt out.

 

[Heelz23]

One outlet should go directly out to a pisser. The other should T off and half go to your pipe and the other to a pisser.

On this Blaster, there is no pisser out the side, its routed through the rear pump I think? Do I need to install one out the side with the new head? The water hose coming from the head goes into the pipe and the one at the stinger also goes into the pipe. Can you expalin a little more?


1211--I will google this to find out what it is, lol.

Thanks for the tips!!!

 

[BMWtech]

Cooling setups are different from machine to machine, pipe to pipe, warm vs. cold water, etc.

I had one outlet routed directly to my pipe and one overboard through a pisser. The pipe also had it's own pisser for a total of 2.

The pump is where the water is coming from. That's your starting point. You should set your pump up for dual cooling which would mean you'll have 2 cooling lines coming from it, one on each side. Run them both to the motor. Then one outlet on the head to the pipe, then one outlet overboard to a pisser.

Jetmaniac sells 1211

 

[Quinc]

Clean the case threads out really well, you should be able to thread the girdle bolts in by hand until they are tight. I put one of these in my drill and go through all of the bolt holes then blow them out with the air compressor.

I use the same grease I put in my trailer hubs to hold the o-rings in.

Torque everything a few more lbs then what ADA says to do.

 

[Heelz23]

Thanks for the tips on the 1211 and the wire brush. I will use it.

I may need some more help on the cooling part. The blaster discharges water out the back somewhere. There is what looks like a pisser attached to the nozzle area. Looking inside, I will have to post some pics and hope you can tell me where the water is coming in from so I can split that and take each to the head. Then if I understand correctly, run one like my current set up from head to pipe and one straight out the side to a newly installed pisser.....is that right?

 

[Quinc]

What kind of pipe do you have?

 

[Heelz23]

its a pro tec pipe that I was told was originally for a VXR but fit the Blaster with a little mod to the black hose that connects to the waterbox.

 

[Heelz23]

I replaced the gas lines and selector valve tonight and took old head off. How does the pistons/spark plugs look?

 

[Heelz23]

okay, got it done with the exception of the second cooling line and a new lord mount to bolt up to the exhaust. Here are the pics, torqued head to 22 and the girdle to 26 after reading several posts saying to go a little tighter.

 

[Heelz23]

You can see where the tab broke off the pipe and Ive ran it two times like that with no problems, you think I need to get a lord mount that fits and connect it again? The one I had is too small for the bracket I have now.

Oh and I saw on the ada site to run BR8ES or BR9ES plugs, are you guys running these?

 

[wanderer1]

Good pipe, I would do what I had to do to run lord mount. BR8ES is commonly run (what I use). 9 is different heat range.

 

[Heelz23]

thanks man, will get the 8's. I wonder if a timesert to make it work. Here is my current cooling, I am thinking about just running a new pisser straight to the additional outlet on the head, will that give the the extra cooling I may need?

Also, for flushing, is it okay to put a T in the line from the head to the pipe to create a flushing point?

Thanks again,

 

[Heelz23]

So I put a compression gauge on it today and I'm reading around 135, this should get me 175+, any idea what I've done wrong?

 

[Roseand]

How good did you clean the gasket/o ring surfaces?
Did you make sure to use grease when you installed the o rings so they didn't come off and get squished? It's very easy to do that.
What was your compression beforehand?

 

[Heelz23]

Yes, I thought I did...I did use grease to keep everything in place. Running the older high compression head, it was around 150 in one and 140 in the other...I have no idea if its a head problem or old rings....the cylinder walls looked pretty smooth when I had the head off. In post #10 there are some pics, how do they look?

Just tested a brand new superjet and it came in at 130-132 in both cylinders, I guess that is about right. Just trying to see if my gauge could be wrong.

Edit, well I googled the numbers and a new ski should be around 150 so I am guessing my gauge is bad. Going to get a new one tomorrow at Advance and check the numbers and see what I get....would it be possible my gauge will only go to 130 or 135?

 

[Roseand]

What's your elevation? High elevation can lower compression. Compression is equal on both cylinders? If so it's either your compression gauge or you've got a tired motor. Might be able to get away with a hone and new rings if that's the case.

 

[Heelz23]

Mountains of NC so its about 2700 feet.

Im going to check with another gauge tomorrow and see what it says. The one Ive been using is a basic walmart special. Im going to get a little better one and see what happens. How do you tell if its the rings? Can you tell anything from the pics in post 10?

I guess I could pull head to be sure I did not pinch the orings, if so, can I put them back in place and try it again or will I need new ones?

 

[Roseand]

If they're not visibly damaged you can reuse them. Somebody else can chime on the difference. If your cylinders look fine there's not much to tell from there. You'd have to take your pistons out to see if the rings look thinner than normal.