2LikesRB Concept Engine Thread..
09-09-2010 | 06:00 AM
#1533
Tech Master
Joined: Nov 2009
Posts: 1,192
From: Colorado
Now where was i? Not accepting defeat i tore the USA down and to be honest didn't really see anything out of the ordinary except low compression. As i stated before the new p/s/r assembly i bought from rb had the least amount of metal pinch new than anything i ever bought. I found that the newer piston fit very snug in my old original sleeve, really snug. After a lengthy conversation with Neal at Clockwork he suggested the block may have a hairline crack so i swapped it out with a spare block i had. This was one of the tightest engines i've tried to start. My ofna blue box with a pair of lipos really struggled. Took a while to break it in. I even took the speed carb off and went back to my fms carb(can't seem to locate the rb carb at the moment). Both carbs look identical. After break in i leaned on it a little and had the carb setup identical to where i raced the fms. It's manners are perfect. I ran tank after tank without shutting it off. Always idled nice, never leaned out and will do full throttle to full stop to full throttle time after time and never act up. Damn block was cracked. I didn't put any sealer on the engine and i still have the P4 plug in it from the race Sunday. I want to thank everybody for their help and suggestions. Sorry to Chris Peralta for aggravating the hell outta ya, lol. If anybody has a spare block they want to sell pm me please. The one i'm using had the locater pin broke off for the sleeve and a new one is in not in the original location causing me to put a new notch in the sleeve. That's a pain.
09-09-2010 | 07:40 AM
#1534
Thanks Chris. I do alot of engine work for racers, so when my own stuff won't run it's not a good thing. When an OS block cracks it's always wet in that location, that's what threw me off.
09-09-2010 | 07:50 AM
#1535
Glow Plugs
Hi. Question Chris.
What is the best glow plug for an RB Engine? An RB Plug??
RB Medium N0. 6
OS No 8.
Odonnell No 77
McCoy No 9.
How about the Nove Rossi C6G??
For use on tight tracks, out side temp from 75 degrees to 100, fuel is 30 percent
Odonnell.
Thanks
What is the best glow plug for an RB Engine? An RB Plug??
RB Medium N0. 6
OS No 8.
Odonnell No 77
McCoy No 9.
How about the Nove Rossi C6G??
For use on tight tracks, out side temp from 75 degrees to 100, fuel is 30 percent
Odonnell.
Thanks
09-09-2010 | 08:33 AM
#1536
Tech Apprentice
Joined: Feb 2009
Posts: 71
From: Germany
09-09-2010 | 09:38 AM
#1539
As far as a standard plug goes the threaded part of plug is too short on the OS plugs. The LC3 is the longer OS plug. Most people i know that run standard plugs use OD99's or other OD plugs. I'm not qualified to answer that question since i've never owned or worked on a non turbo plugged engine.
09-10-2010 | 02:00 PM
#1540
So now the C6 USA is running flawless everyday. I went to .3mm head shims. I have noticed it's tough to get the OS plug to seal properly as it seeps some around the plug but it damn sure runs well with it. Now i will buy the whole farm and switch to RB plugs cuz i don't like tightening it that hard. I will probably go down to .2mm shims since the murnan modified head button has 2 more small cuts in it to help with flame travel adding a small amount of volume. I'm used to running engines with raised compression with colder plugs. With the shimming being lower do i want the #6 or will the #7 work without being too cold? I live in Pa. and our tracks are close to sea level. Thanks.
09-10-2010 | 02:03 PM
#1541
Tech Regular
iTrader: (9)
Joined: May 2010
Posts: 389
So now the C6 USA is running flawless everyday. I went to .3mm head shims. I have noticed it's tough to get the OS plug to seal properly as it seeps some around the plug but it damn sure runs well with it. Now i will buy the whole farm and switch to RB plugs cuz i don't like tightening it that hard. I will probably go down to .2mm shims since the murnan modified head button has 2 more small cuts in it to help with flame travel adding a small amount of volume. I'm used to running engines with raised compression with colder plugs. With the shimming being lower do i want the #6 or will the #7 work without being too cold? I live in Pa. and our tracks are close to sea level. Thanks.
09-10-2010 | 04:41 PM
#1544
Tech Master
Joined: Nov 2009
Posts: 1,192
From: Colorado
So now the C6 USA is running flawless everyday. I went to .3mm head shims. I have noticed it's tough to get the OS plug to seal properly as it seeps some around the plug but it damn sure runs well with it. Now i will buy the whole farm and switch to RB plugs cuz i don't like tightening it that hard. I will probably go down to .2mm shims since the murnan modified head button has 2 more small cuts in it to help with flame travel adding a small amount of volume. I'm used to running engines with raised compression with colder plugs. With the shimming being lower do i want the #6 or will the #7 work without being too cold? I live in Pa. and our tracks are close to sea level. Thanks.
09-10-2010 | 04:58 PM
#1545
Thanks guys. Finally got in touch with Uriah. He said the nova C6TGC or
C6TGF is what he uses, can't remember exactly. Nova has all kind of crazy plug numbers going on. A local hobby shop has the #7 RB's in stock but not the 6's. I'll order some RB #6's. I was also told by Uriah that if the OS's seal ok to keep running them. If i knew for sure the OD99T's were cold enough i would give them a try. Now they have a 87T out??????? Oh the simple days of OS Speeds with P3's! What have i done?
C6TGF is what he uses, can't remember exactly. Nova has all kind of crazy plug numbers going on. A local hobby shop has the #7 RB's in stock but not the 6's. I'll order some RB #6's. I was also told by Uriah that if the OS's seal ok to keep running them. If i knew for sure the OD99T's were cold enough i would give them a try. Now they have a 87T out??????? Oh the simple days of OS Speeds with P3's! What have i done?