04-12-2007, 08:21 AM #1
Pro-Teb billett head. Which have I got?
Just received a new Billett cylinder head made by Pro-Tec, bought from exact personal watercraft.
There are no markings on it. is there a way of finding out if it is the 'rec' or 'limited' spec one without bolting it up and doing a comp test?
04-12-2007, 08:34 AM #2
04-12-2007, 08:38 AM #3
Did it come in any sort of Pro-Tec packing? 14-9495 is the rec head 14-9496 is the higher compression one. When you bought it from Exact did they specify which one it was?
04-12-2007, 08:42 AM #4
The way i do it is, you need
1. some type of graduated cup or cylinder that has cc's on it,
2. a piece of thick maybe 1/2 inch plexiglass about the size of the one cylinder with a small hole drilled in the middle
3. a syringe or a device to inject the water into the head through the hole
but most all the machine shops will do a cc check real cheap. it is money well spent...
04-12-2007, 08:51 AM #5
No,Exact didn't say(Even thogh I did ask).
I think I've ****** up!
It 'looks' as if it's the limited one!
The transition from the deck area to the combustion chamber has no lip there at all, and looking at the Pro-Tec catalouge, the rec one does have a definite lip!
A well, anybody need a Limited Pro-Tec head??
04-12-2007, 11:24 AM #6
you could get close enough to determine .. roll a spark plug into the head , flip it over, get a graduated syringe,from the apothicary..(pharmacy), pull it full with an amount you know is larger than your cyylinder is, of light oil,read that #..level the head and slowly fill it with oil.. surface tension will simulate your gasket area,just fill it to the edge .. its not exact but will detirmine a large known cc spec.difference.
04-12-2007, 12:40 PM #7
Mongoose.the head i bought was 210 psi, at first.but I paid only25.00 new....they went for about 400.00, my machinist removed the same amount in the bowl untill they all read the same cc, that made it 150 psi....cost around 65.00 / 75.00 to do...
04-12-2007, 12:43 PM #8
Did the same thing with some flat-top domes from Mel-miller for the gpr.
04-12-2007, 02:15 PM #9
had 2 heads side by side(stock and Pro-tec), put the plugs in and just filled with water to the head gasket level.
Don't suppose what iv'e done is very accurate, but it is a comparison.
Stock head 55ml
I think ml is the same as c.c.
Does that help to tell me wht head/comp ive got?
04-12-2007, 02:21 PM #10
As a comparison yes, but not accurate enough to justify getting rid of it, have it measured ,then decide....it is the cheapest..
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