harry im sending u my motor

stosh11 · 11-23-2009, 12:52 AM

harry,
couple questions im sending u my motor i n january. here is a list of aftermarket parts that i have,
1, spring pole
2. westcoast pipe 3 nozzle
3. pjs head 185 psi
4. westcoast manifold
5 44 sbn carb
6 bcw racing intake
7 coffman waterbox
8 team butch rideplate
8. skat trac 6 prop
9 westcoast intake
10. reeds
my question is if i have u bore the engine .50 and port and polish the cylinder and crankcase am i going to have to run race gas and im using the ski for surf riding and occasional ameatuer races and ridin around on the river.. or what would u suggest we do to it so it will be reliable and fast with some sick low end.waterworx in port st lucie florida is helping me do my build and he refered me to you!!!

'Crockett · 11-23-2009, 01:05 AM

I don't know how often Harry checks this forum so you should probably contact him directly prior to shipping your engine . . .

The phone number and address is avaible at their website:

http://www.groupk.com/

You've provided a lot of good info about your build, but I'd suggest that you tell him specifically what ski it is that you are building up.

Good luck with your build !

Group K · 11-24-2009, 03:33 PM

Sorry for the delayed reponse.

What year & model of boat are we talking about here??

Harry

Quote:

Originally Posted by stosh11

harry,
couple questions im sending u my motor i n january. here is a list of aftermarket parts that i have,
1, spring pole
2. westcoast pipe 3 nozzle
3. pjs head 185 psi
4. westcoast manifold
5 44 sbn carb
6 bcw racing intake
7 coffman waterbox
8 team butch rideplate
8. skat trac 6 prop
9 westcoast intake
10. reeds
my question is if i have u bore the engine .50 and port and polish the cylinder and crankcase am i going to have to run race gas and im using the ski for surf riding and occasional ameatuer races and ridin around on the river.. or what would u suggest we do to it so it will be reliable and fast with some sick low end.waterworx in port st lucie florida is helping me do my build and he refered me to you!!!

stosh11 · 11-25-2009, 12:44 AM

sorry its a 1987 650 sx

Group K · 11-25-2009, 11:56 AM

Stosh,
Doing the boring and porting will still allow you to run on 91 octane. For better bottom end, I'd recommend a Jetworx valve ($59) to put in the stinger water-line... they work great.
If you do occasional racing, I would recommend to just get a second head that we can cut to a higher race-gas compression ratio to further increase your bottom end. Another wise addition would be to replace the old Skat 16 with a re-pitched Solas "I" prop ($229). The improved hub design of the Solas allows it to process more water per revolution ... and it offers better acceleration as well as better top speeds ... money well spent.
I have mixed feelings about the Coffman waterbox. The stock box works great, is considerably quieter, and would have a little better low range performance.... It might be worth finding one.

Respectfully, Harry Klemm

Quote:

Originally Posted by stosh11

harry,
couple questions im sending u my motor i n january. here is a list of aftermarket parts that i have,
1, spring pole
2. westcoast pipe 3 nozzle
3. pjs head 185 psi
4. westcoast manifold
5 44 sbn carb
6 bcw racing intake
7 coffman waterbox
8 team butch rideplate
8. skat trac 6 prop
9 westcoast intake
10. reeds
my question is if i have u bore the engine .50 and port and polish the cylinder and crankcase am i going to have to run race gas and im using the ski for surf riding and occasional ameatuer races and ridin around on the river.. or what would u suggest we do to it so it will be reliable and fast with some sick low end.waterworx in port st lucie florida is helping me do my build and he refered me to you!!!

stosh11 · 11-27-2009, 02:32 AM

so the pjs head is no good? do i want my compression higher than 185? am i going to lose `reliability?

the WaTeRhAwK · 11-27-2009, 03:11 AM

harry, what is it about the stock waterboxes that give better low end, over aftermarket aluminum ones?

SflSwampRat · 11-27-2009, 09:17 AM

more backpressure would be my guess.

the WaTeRhAwK · 11-27-2009, 11:39 AM

Quote:

Originally Posted by SflSwampRat

more backpressure would be my guess.

smaller volume? more back pressure is going to raise peak rpms, not enhance low range. unless you mean the coffman adds more back pressure as opposed to the stock one.