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Getting an O'Neill Brothers Racing 27.2 Full Mod
Discussion in Oneill Brothers Racing forum, started by BallsoutBaja.
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02-09-2011, 03:42 PM
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GAS kicks ASS!!!!
Baja Maniac
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Join Date: Jul 2009
Location: Tehachapi, Ca (Edwards AFB)
Posts: 5,577
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Getting an O'Neill Brothers Racing 27.2 Full Mod
Just ordered a new OBR 27.2 Full Mod 4 bolt Zen for my 5B to replace the 27.2 Race ported 2 bolt CY which I have installed in my 5T. I'm pretty stoked to get it in and wanted to know what some of the other experiences are out there. What's the big difference between a full mod and race ported?
Just ordered it the other day so I'm expecting it any day now. I'll
post up once I have it in hand.
Thanks O'Neill Brothers racing, looking forward to feeding it some go
juice.
Balls......Out
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02-09-2011, 03:48 PM
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The Jester's Court
Baja Maniac
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Join Date: Jul 2008
Location: NJ
Posts: 13,539
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I just go right for the Full Mod. So I can't tell you the difference. But congrats!
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02-10-2011, 02:28 AM
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That's Mr. Iceman to you!
Baja Maniac
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Join Date: Apr 2007
Location: Key West, Florida
Posts: 2,421
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This is the fastest motor I've owned to date and is still running very strong after over 15 tanks. Also, when I bought the motor I also picked up a Victory Pro side mounted and unsilenced pipe. The motor feeds off that thing and it revs to the moon.
When I was motor shopping, I was looking at the web page descriptions between the race port and the full mod and saw the differences there. It's the little things sometimes 
You're gonna love that motor, though. It's a ripper!
Jeff 
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02-10-2011, 02:59 AM
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GAS kicks ASS!!!!
Baja Maniac
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Join Date: Jul 2009
Location: Tehachapi, Ca (Edwards AFB)
Posts: 5,577
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Some assembly required?
Well, this is my first Full Mod. I'm so stoked! Didn't know there was some assembly required though. Does anyone have a manual for these things or should it be in the SS manual? 
Here's a couple shots of it before I start putting it together. I do have to say, the O'bros did a great job packaging it all up and making sure no dust or dirt get into the intake or exhaust ports:
It's a little dirty but I'm sure that's from them testing and tuning it before they sent it to me...
Is that an extra bearing in there just for me?
And here's a few of all the extra screws, washers and bolts. Sure was nice of them to throw that all in just to keep me up and running:
Well, I'm done for the night. Gotta get my girls to bed and I'm following close behind... 
What carb do you guys think would get this beast screaming?
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02-10-2011, 03:54 AM
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Senior Member
Baja Maniac
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Join Date: Aug 2010
Location: Eastern NC
Posts: 386
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That's the cy 2bolt out of ur truck not the new zen 4 bolt. What r u......playing us?
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02-10-2011, 03:54 AM
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Senior Member
Baja Maniac
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Join Date: May 2010
Location: UAE
Posts: 2,198
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Difference is more compression for the Full mod, lightened piston even further and reshaped intake and exhaust. Overall, one of the best engines I have ever had.
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02-10-2011, 04:01 AM
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GAS kicks ASS!!!!
Baja Maniac
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Join Date: Jul 2009
Location: Tehachapi, Ca (Edwards AFB)
Posts: 5,577
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Quote:
Originally Posted by Markster
That's the cy 2bolt out of ur truck not the new zen 4 bolt. What r u......playing us?
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No sir, "I'M" not playing with you guys.. I repeat, "I'm" not...
I can tell you this for sure.. It for sure isn't the CY 2 bolt from my bajas.. I took the older Cy 2-bolt and have that in my 5T. It's installed and running so I know it's not that one...
These are fore sure pictures of the engine I got from OBR... 
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02-10-2011, 04:11 AM
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The Jester's Court
Baja Maniac
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Join Date: Jul 2008
Location: NJ
Posts: 13,539
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Dans port work looks good as always!! 
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02-10-2011, 04:22 AM
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GAS kicks ASS!!!!
Baja Maniac
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Join Date: Jul 2009
Location: Tehachapi, Ca (Edwards AFB)
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Quote:
Originally Posted by dscjester
Dans port work looks good as always!! |
I've been looking at my other OBR motors and I think this is the best one yet...
Gotta get back to work on it.
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02-10-2011, 04:29 AM
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The Jester's Court
Baja Maniac
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Join Date: Jul 2008
Location: NJ
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Quote:
Originally Posted by BallsoutBaja
I've been looking at my other OBR motors and I think this is the best one yet...
Gotta get back to work on it. |
I have to agree! Those boys are getting better with age! Like a fine wine!!
Goodluck! Let us know how it runs!
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02-10-2011, 04:52 AM
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Banned
Baja Maniac
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Join Date: Sep 2007
Location: California (SO CAL)
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WHEN WILL THOSE be back in stock? Is that a good engine for the general basher? I'm no professional but that definitely looks purpose built..
-Anthony
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02-10-2011, 06:18 AM
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Senior Member
Baja Maniac
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Join Date: Feb 2009
Location: Oceanside, CA
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I don't know... I've heard it's a hit or miss with them O'Neill engines...
Best stick with ESP...
-Tony
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02-10-2011, 07:45 AM
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Senior Member
Baja Maniac
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Join Date: May 2010
Location: UAE
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Quote:
Originally Posted by ArcherX66
I don't know... I've heard it's a hit or miss with them O'Neill engines...
Best stick with ESP...
-Tony |
Come on Tony. some might take that seriously
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02-10-2011, 11:53 AM
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GAS kicks ASS!!!!
Baja Maniac
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Join Date: Jul 2009
Location: Tehachapi, Ca (Edwards AFB)
Posts: 5,577
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Yeah, for sure it was purpose built. Just for me. . Wouldn't recommend it for a newb as it's not a direct drop in and go.. But, it does come withh spares to help build up parts box.
Not a thread to talk crap about other engine builders but, I have ran only one other builders engine and the head cracked first 5 min of running it.. For the record, builder isn't on HBF
Even though it looks like she needs some work, still sticken with OBR.. I know I can get her fired up, I know it!
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02-10-2011, 03:10 PM
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Contributor - All
Baja Maniac
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Join Date: Dec 2009
Location: NJ
Posts: 793
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That's pretty cool of the OBR guys.... I have a full mod 27.2 myself! Those baby's make some serious compression so it's good to have the extra bolts etc.! Is that their titanium bolt set to save weight? Enjoy it bro!
Jerzy
Last edited by Jerzy 5T; 02-10-2011 at 03:13 PM.
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02-10-2011, 04:05 PM
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Contributor - All
Baja Maniac
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Join Date: Mar 2009
Location: Woodland Hills, CA
Posts: 2,482
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I have 2 OBR Full mod 27.2's. I love them. The full mod 27.2 has pushed my Baja to 72.5mph in street speed testing. Very Please. 
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02-10-2011, 04:11 PM
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Senior Member
Baja Maniac
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Join Date: May 2006
Location: Pacific Northwest, USA
Posts: 624
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Quote:
Originally Posted by BallsoutBaja
It's a little dirty but I'm sure that's from them testing and tuning it before they sent it to me...
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Was it that dirty when you sent it in?
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02-10-2011, 04:16 PM
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The Jester's Court
Baja Maniac
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Join Date: Jul 2008
Location: NJ
Posts: 13,539
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Quote:
Originally Posted by marksp
Was it that dirty when you sent it in?
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This is just alittle OBR humor.
So no one thinks this is real! Once you get to know the boys. The are funny as S  T. I think Ballsout is just having alittle fun.
Kids, don't try this at home!
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02-10-2011, 04:51 PM
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Advertiser
Baja Maniac
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Join Date: Jul 2006
Posts: 1,506
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You guys made my morning, haven't laughed this hard in a long time.
Derrell is one of our good friends and we figured we would have a little fun. We rebuilt his 27.2cc 4 bolt engine and just happened to have that beat up 2 bolt long block laying around. After a quick talk with Dan next thing you know the pistons went to TDC and the magic started happening
Don't worry bud, your real engine shipped a day after.
$10 shipping + $0.50 in extra hardware.... PRICELESS
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Sean O'Neill
OBR - The cutting edge of high performance RC engines. Always innovating, never duplicating!
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Last edited by oneillbrothersracing; 02-10-2011 at 04:53 PM.
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02-10-2011, 06:19 PM
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Senior Member
Baja Maniac
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Join Date: May 2010
Location: UAE
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I know no body would believe this, but this video was taken with a scored to sh*t cylinder, look how it pulls 18/56
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