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-   -   Kryptonite project begins.... (https://www.offshoreonly.com/forums/kryptonite/220971-kryptonite-project-begins.html)

jdub 04-27-2010 07:10 PM


Originally Posted by Marty H. (Post 3097199)
Hey, Tom I'll look and see if I can meet up with you this summer in the bay, and you can drive your old boat!!!! Tyler Crockett did the motor work. 468 new cam, rods and pistions, stock heads with bigger valves, increased boost to 7lbs and dyno tuned. At the end of the day we ended up with 804hp @ 5400 rpms with good torque numbers too!!!!!!!!!

That's nice. She's going to be a runner. When is it getting wet?

Marty H. 04-27-2010 09:56 PM

I'll be putting it in for a test run this Thursday, gonna test with a 32, 4 blade prop. Hopefully I get the prop size right the 1st time, I'll let you guys know.

Philm 04-28-2010 09:23 AM

Not gonna be big enough. I can tell you that right now. With a 1.5 gear ratio and 800hp I can turn a 32p Bravo 1 to 6300-6400 rpm. You will definitely need to either change gear ratios or get a much larger prop. Test it out first for sure, but i am pretty sure you will run well over 5400rpm with ease.

jdub 04-28-2010 04:50 PM

Marty, what drive are you running? If it's a XR 1.36 lower gears might be the ticket....thicker too for all the torque.

Marty H. 04-29-2010 08:48 PM

Well, I took the boat out today, nice day but very windy!! You guys we're right a 32 prop is not big enough. But it doesn't seem to be far away from where I need to be, revlimiter is set at 5650. Not sure if I hit it, but I was close to it. Has anyone tried a 5 bladed prop???? Trying to prop it to 5400.

DonRoc 04-29-2010 09:52 PM


Originally Posted by Marty H. (Post 3098935)
Well, I took the boat out today, nice day but very windy!! You guys we're right a 32 prop is not big enough. But it doesn't seem to be far away from where I need to be, revlimiter is set at 5650. Not sure if I hit it, but I was close to it. Has anyone tried a 5 bladed prop???? Trying to prop it to 5400.

The maximus worked really well for me a 30 might be the right size for you. I also ran a Hydromotive p5+, it had too much stern lift. sounds like you are close enough to call brett @ BBlsdes and have him fine tune what you have or work a 34" the 34 B1 suck out of the box but brett does a great job with them. I have found the B1 works best for our hulls. But the labbed Maximus also worked really well for me.

Philm 05-01-2010 01:17 AM

I also had a P-5 on mine when i got it. I wasnt a fan of it at all. it wasnt nearly as fast and it chine walked like crazy at anything over 85mph due to the massive stern lift. It was a 29p.

What kind of speeds were you seeing? I am suprised that it was even close to working out for you, considering how low your rev limiter is. The only reason I say that is because with similar hp and a 32p bravo 1 I run through 5650rpm with ease, all the way up to 6300.

Marty H. 05-01-2010 08:20 PM

took it back out today. I watched the tack realy good. 32 is not even close 93mph hitting the rev . still have lots of throttle left.I'll make calls monday to see about getting 1.3 ratio

jdub 05-02-2010 07:17 PM


Originally Posted by Marty H. (Post 3099976)
took it back out today. I watched the tack realy good. 32 is not even close 93mph hitting the rev . still have lots of throttle left.I'll make calls monday to see about getting 1.3 ratio

Sounds like that should work for you. You should be able to get a set of lower gears for a good price, that's all you need. Unless you want a whole new lower and sell yours or keep it for backup.

jdub 05-02-2010 07:19 PM

2 Attachment(s)
Some more progress. Before and after shots:


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