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Old 10-09-2019, 05:35 PM
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Default 222cc predator build

Iím building an open motor for one of my best friends, itíll be stroked .080 and have a 2.795 bore making it a 222cc. Weíre purposely pushing the envelope with this one as itíll be on 25% nitromethane and 75% methanol to see if the block will take that kind of cylinder pressure.
Specs are
.040 overbore
.080 over stock stroke
Wiseco 2 ring piston .490 wrist pin
ARC 3.595 billet rod
14 cc fully ported 32/27 head
Unknown cam with .298 lift
1.3 roller rockers
Chromemoly pushrods
NR racing 390 carb adapter port, matched
Highly modified GX390 carb
ARC billet flywheel

Iíll post pictures later tonight. Iím waiting on the new crank and I had the block decked .020 so Iím waiting for it to come back from the machine shop.
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Old 10-09-2019, 05:53 PM
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Cool...I wanna watch!
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Old 10-09-2019, 06:04 PM
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You've gotta name it "Triple 2s"! Or something!
This is gonna be wicked, I just wish I had that kind of money to do nutty builds like these!
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Old 10-09-2019, 06:57 PM
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Can we see how it'll do on gas first?
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Old 10-09-2019, 09:13 PM
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Quote:
Originally Posted by Kartorbust View Post
Can we see how it'll do on gas first?
Nope, the carb is already built and tuned on my motor on my race kart.
This is actually for one of my best friends for his race kart. When I took it apart it had a 22cc 25/27 head on it and the piston was .080 in the hole which was what prompted decking the block and the stroker crank.

---------- Post added at 09:13 PM ---------- Previous post was at 09:12 PM ----------

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Originally Posted by BigWes View Post
Cool...I wanna watch!
There will be video for sure. Probably on board the first time out with it.

---------- Post added at 09:13 PM ---------- Previous post was at 09:13 PM ----------

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Originally Posted by JTSpeedDemon View Post
You've gotta name it "Triple 2s"! Or something!
This is gonna be wicked, I just wish I had that kind of money to do nutty builds like these!
Iím thinking it should be the triple Duce and a quarter because of the 25% fuel.
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Old 10-09-2019, 09:18 PM
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Pictures of the valves, the adapter after port matching, the carb which I thinned the throttle shaft and screw, and tapered the air bleed holes and choke area on the air filter side. It should be a smooth flow from the air filter to the valve.
Attached Thumbnails
D06DB208-AA95-414F-BFBA-4C4BCE49B3E5.jpg   31A7C658-37F5-48B8-A643-363E1406D390.jpg  

839DF0F2-F1B7-4FB5-AEE5-06C0EB89EBED.jpg   6439CA89-2F56-4939-B86F-694CA37B33A0.jpg  

AEABB583-E0BB-4008-8ED6-795AF6BAD752.jpg  
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Old 10-10-2019, 06:43 AM
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Those valves can't get any bigger.
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Old 10-10-2019, 09:10 AM
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Quote:
Originally Posted by JTSpeedDemon View Post
Those valves can't get any bigger.
Thatís the way I like Ďem
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Old 10-10-2019, 09:28 AM
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Dang this thing is gonna be 10/10 mean in every way
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  #10  
Old 10-10-2019, 11:32 AM
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Originally Posted by Budget GoKart View Post
Dang this thing is gonna be 10/10 mean in every way
We race in the same class, and to be honest, Iím not real excited about having to race it. This guy is 75 years old and has raced sprint cars his whole life, so it goes without saying that heís a wheelman.
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Old 10-10-2019, 07:23 PM
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So if this build goes well, will you be doing one up for yourself or will this just be a one off? If nothing else, this will be a great thread for people to read later on if they want to build one themselves.
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Old 10-11-2019, 08:29 AM
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Quote:
Originally Posted by Kartorbust View Post
So if this build goes well, will you be doing one up for yourself or will this just be a one off? If nothing else, this will be a great thread for people to read later on if they want to build one themselves.
The engine that I’m running now is very similar to this except for stock bore and stroke and 15%, I’m building a big bore stroker with the new tillotson 72mm bore reinforced block, +.175 super alloy ARC stroker crank, and the best parts available. I plan on running it on 30%. I thought everyone might enjoy watching this one, so I’ll post the build. I’ll probably post the build of my new one too, but I’m still gathering some pretty expensive parts so it’ll be a little while before I get started on it.
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Old 10-23-2019, 03:59 PM
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I ordered a side cover stud kit, and when I got it I found that whoever had built this engine previously had drilled out the dowel pin holes to a bigger size. My solution was to head for the local hardware store, block in hand and test fitted sockets until I found something with a nice snug fit. Then I headed back to the shop and lopped off the part I needed from each of them to use as side cover dowel pins.
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Old 10-23-2019, 07:43 PM
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Six point too. Lol.
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Old 10-23-2019, 08:31 PM
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Quote:
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Six point too. Lol.
Only the best.
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Old 10-23-2019, 10:25 PM
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https://youtu.be/-F6SYkkGs84
It sounds pretty sporty. I failed on documenting the build. I got to building it and forgot to take pictures. I’ll be swapping A couple of parts soon and will try to take pics of everything then.
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Old 10-23-2019, 10:34 PM
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Sounds nasty!
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Old 10-23-2019, 11:12 PM
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Sounds great. Just keep it out of the Hall of Heartbreak. JK
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Old 10-24-2019, 09:00 AM
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Quote:
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Sounds great. Just keep it out of the Hall of Heartbreak. JK
We built this knowing it may be a time bomb. Weíre seeing what we can get away with on a stock block. Some of those hall of heartbreak pictures are humbling. I only thought I was good at breaking stuff, lol.
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