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Lets build a new cat

Lets build a new cat

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Old 12-01-2013, 11:11 AM
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Default Lets build a new cat

The blast cat is going to get a new motor over the winter. This thread will cover the build process, placed a few orders over the weekend, this thing should be a monster. Motor is going to be made from mostly new parts and rest will be taken off of current engine. I'm going with the gizmo 29.5 full mod race kit and a 1mm crank.
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Old 12-01-2013, 11:17 AM
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You're gonna need some bigger props!
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Old 12-01-2013, 12:15 PM
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Don't even know where to start.
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Old 12-01-2013, 01:14 PM
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Old 12-01-2013, 01:46 PM
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What would be a good starting point to prop?
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Old 12-01-2013, 04:19 PM
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Good question as I'm going to be having to figure that one out myself! I dropped a Suicidal modded K-30 into my Rampage and am going to start off with a 7020 to see where that gets me. My modded RCMK 265 barely spun it, it would take a while to get it up to speed but when it got there, it hauled! Yours should easily turn a 7018 but ask around to see what others are running on their Cat's. I'm kind of looking at the new engine that Zippkits rolled out to replace the stocker in my Blast Cat. $195.00 for a fully modded Zen clone isn't bad. Mike Ross (Suicidal Engines) did the testing on the prototypes and will run them to death before he puts his stamp of approval on them.
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Old 12-02-2013, 06:38 AM
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Thank goodness I got people that will let me try props lol, I talk to Bruce see what he recommends.
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Old 12-02-2013, 08:21 AM
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I've got an idea that Bruce is kind of busy today as he's having a Cyber Monday sale and his site is acting up. He's got some really good buys on there right now!
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Old 12-02-2013, 09:18 AM
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That looks like a interesting motor that zipp has with a zenoah top.
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Old 12-02-2013, 11:39 AM
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I see that he's selling top ends so they must be replacing them with modded ones. I'll check them out in April at the Toledo Show but I can order one anytime if I get impatient. My Blast Cat only has a stock RCMK in it for now and it's running really well with that in it yet I always feel the need for more speed. My son has been driving that one a lot since I pulled that lousy modded motor out of it.
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Old 12-02-2013, 03:29 PM
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This site is a little slow for me getting instant e-mail notifications as I'm getting them several hours later!
I've got lots of props that I've been collecting, some that I've picked up at swap meets and have to see what my other boats couldn't spin so I'll try those. My boating buddy doesn't have many either so he's trying out mine to see what works on his boats before dropping the money on ones that won't. Bob English at G-Force Hydro's has done a lot of props for me. Chris "dasboata" Hoffmann just had a kidney transplant so he's out of business while he recovers. You could also try Brent Dailey at Propworks West for advice or just ask on The Dock. I really hate asking on there as my threads turn out to be off-topic pissing matches. See the one I started in the General forum about the Zimmerman valved RCMK. If you can find that prop spreadsheet on there it might be some help.
hotrod87, you're more than welcome to read this thread and join in on the conversation so join in!
I also think that with the 29.5 and 30cc engines we may have to go with 1" exhaust systems as the 7/8" isn't going to get it anymore. Some 27cc engines were struggling with the 7/8" 's. You might want to open up the needles a hair.
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Old 12-02-2013, 04:27 PM
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Are the zero drag seals necessary?
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Old 12-02-2013, 06:17 PM
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Not really. Supposedly there is a 500 RPM increase in using them but I don't know as I never used them.
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Old 12-02-2013, 06:21 PM
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Do you think, I would need a new pipe? Zipps site said they work good with big blocks. On my old motor, there is a spot in the jug where I had seized the old piston to it. I had taken some really fine grit paper and got the high spots out, the motor has ran fine since then, there are some marks on the new pistion from it, is it something I should be worried about?
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Old 12-02-2013, 06:30 PM
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I ought to just give you my cell phone number!
I've got a few of Joe's pipes and I've also heard that they work well on 30cc engines. The K-30 that I got came with a huge pipe that I want to try. I also bought a pipe from Dan Place last summer, very impressed with it. That's on my F-41 right now.
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