Thread: 1300 cylinders
05-29-2006, 06:37 PM #1
I would like to maybe purchase some 1300 cylinders that would work on a 2000 gpr. I guess they need to have the power valves. How would I go by getting this to work?
05-29-2006, 07:08 PM #2
if you do this, it will work fine but you will need some 84mm pistons to go along with it. Timing may need to change as well (i think). I would give Kerry a call - he can do the whole thing for you instead of you having to worry about all the little details of it. Just my opinion.
05-29-2006, 09:56 PM #3
well I was talking with someone and thought I'd get on here and see what all you would have to do to convert a 1200 to a 1300. I really don't think there is much gain in top end speed wise when going from a 1200 to a 1300. I just see bottom and maybe some midrange gains. I might be wrong, if so, please explain. Thanks.
05-29-2006, 10:34 PM #4
well look at it this way --the stock speeds on a 1200cc (80mm Pistons) from the dealer were about 62.
the stock speeds on a 2003-2004 1300cc (84mm Pistons) are about 64mph.
2005 & 2006 boats are running same 1300cc's but are getting faster speeds (up to 66 & 67mph stock) just due to the high pressure pump change, and the motor doesn't utilize power valves anymore. The hull is lighter as well.
You could bet on at least 2 mph for the 100cc upgrade without changing anything else.
So if you are going to big bore your ski---then you may as well go as big as you can because it's going to cost the same. So you can spend the money to go 2 mph faster or you can spend the EXACT same amout and go to a 1400cc or bigger. See where i am going with this?
Doing otherwise would be like going to the gas station offering free gas and only taking half a tank-----because all the bore/renick jobs are all the same and bigger pistons aren't any more expensive than the smallest ones out there.
Top speeds will all vary depending on certain set-ups. When you get into the 1400cc range--your talking about some serious power (even without porting).
I hope that this helps.
05-29-2006, 10:41 PM #5
so if they went to a 1400 cc setup, your saying there is a 4-5 mph gain? Thats without changing anything else except the bore and pistons.
If I had someone bore out the cylinders, where can I send them to get nikasild?
Abbot, as always, thanks man.
05-29-2006, 10:48 PM #6
send everything to Kerry---look at my signature and read his info. He can do anything you want to have done to your motor. You should call him--he would love to talk with you about it.
1400cc---from a 1200cc ---5mph gain?? HELL YES AND THEN SOME. Right now just by adding an angled R&D skegged ride plate will give you 3 or 4 by just bolting that on.
05-29-2006, 11:21 PM #7
Originally Posted by shooter98xpl
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05-30-2006, 05:39 AM #8
Abbot, I have an angled skeg plate from Jim, there was no 3 to 4 mph gain from it. But I am comparing it to a group K ride plate.
I am not the one getting the mod done, its information for someone else. I guess I'll buzz Kerry and talk with him and see what he has to say.
05-30-2006, 07:09 AM #9Originally Posted by shooter98xpl
05-30-2006, 07:54 AM #10I would like to maybe purchase some 1300 cylinders that would work on a 2000 gpr. I guess they need to have the power valves. How would I go by getting this to work?
2fast4u has a 1300 top end for sale.
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