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-   -   RB Concept Engine Thread.. (https://www.rctech.net/forum/offroad-nitro-engine-forum/251409-rb-concept-engine-thread.html)

daniel.cordes 06-21-2011 11:51 AM


Originally Posted by Chris Peralta (Post 9286404)
To me that sounds like a fairly stable idle so it does not sound like an air leak to me but anything is possible. Are both of your needles still out from flush? Generally if it idles nice after reving the engine up and then drops down to a lower idle the LSN is set too rich which will cause it to load up and die, especially with too cold of a plug. The colder the plug is the more exact you have to be with the tune in general.

well at times when its idleing i need to rev it up very gently cuz otherwise it dies!!

Hotts 06-21-2011 12:02 PM


Originally Posted by Chris Peralta (Post 9286421)
Thanks for keeping the stuff coming into the US!!!! I sent ya an email :D

I got it Chris, you come highly recommended from Monty. Not sure if that is a good thing :lol:

Chris Peralta 06-21-2011 12:21 PM


Originally Posted by daniel.cordes (Post 9286457)
well at times when its idleing i need to rev it up very gently cuz otherwise it dies!!

I think you should try a hotter plug, especially if a 7 is whats in there now. Are both your LSN and HSN out from flush still?

daniel.cordes 06-21-2011 12:25 PM


Originally Posted by Chris Peralta (Post 9286570)
I think you should try a hotter plug, especially if a 7 is whats in there now. Are both your LSN and HSN out from flush still?

yep I will try a hotter plug, well ive played around with both of them from factory to leaner to get better results but since it still dies they are back to fac setings..

leaning them both and seperately a quarter of a turn, half a turn and more has been done to see if improvements came, but it didnt..

Chris Peralta 06-21-2011 12:32 PM


Originally Posted by daniel.cordes (Post 9286597)
yep I will try a hotter plug, well ive played around with both of them from factory to leaner to get better results but since it still dies they are back to fac setings..

Ok try the hotter plug and then tune it some more. If the top speed feels good to you at the current settings then work on leaning the LSN to get the idle just right. As you lean the LSN you will also have to start lowering the idle it's self. when you have the LSN just right you should be able to make a high speed pass and stop right in front of yourself and the idle should drop down to a nice stable idle pretty quickly. If it idles high for a few seconds then drops low your still to rich on the LSN. If it idles good for a second or two then drops super low and just dies you are also too rich on the LSN still.

aznitronut 06-21-2011 12:48 PM

Gotta you have PM.

aznitronut 06-21-2011 12:52 PM


Originally Posted by daniel.cordes (Post 9286597)
yep I will try a hotter plug, well ive played around with both of them from factory to leaner to get better results but since it still dies they are back to fac setings..

leaning them both and seperately a quarter of a turn, half a turn and more has been done to see if improvements came, but it didnt..

It sounds like Chris has you on the right path. Did you get a chance to check your exhaust gaskets?

D Starks 06-21-2011 01:14 PM


Originally Posted by Hotts (Post 9286375)
Hi everyone,

I am the new distributor for RB products in the USA. If you have any questions, feel free to email me: [email protected]

Check out rb-usa.com for more information.

Jim Hottinger
Fusion Motorsports

P.S. I have not posted on this forum for a very long time, please forgive any errors or mistakes and the ability to post links. :lol:

Hey Jim,

Congatulations on your new venture.

Dave Starks

Hotts 06-21-2011 01:18 PM


Originally Posted by D Starks (Post 9286791)
Hey Jim,

Congatulations on your new venture.

Dave Starks

Hi Dave, thanks, I look forward to working with all you again now that I have on road engines.

Chris Reilly 06-21-2011 02:16 PM

Congrats Jim on the new venture.

daniel.cordes 06-25-2011 07:36 AM

Quick update!!

Good evening,

well the engine is completely apart now and it looks really well and healthy. A nice layer of oil was coating the engine and everything felt really smooth and nice. Chris, there were only one shim! And aznitronut, the exhaust does not seem to leak anywhere. However, the engine is only sealed with rubber rings here and there so I'm gonna reseal it completely and slime it here and there. So what is yet left to do?! Plugs are coming, sealing is soon done, exhaust is not leaking, internal parts of the engine are good...

Which fuel did you guys find better? RB:s own fuel or OŽDonnell?

Daniel

JeredR 06-25-2011 09:27 AM


Originally Posted by JeredR (Post 9265590)
I just ran a tank through my rc8t with s7 europa,it runs good even with 14t clutch bell just needs 13t to get some snap for corners and jumps.

I just ran it with the 13t clutch bell,it's just right now.Seems like it's a whole lot better on fuel than my jpx .28,we'll see how much better today at the track.I haven't got another pipe yet,so still running jp4.

JeredR 06-26-2011 07:35 AM

I raced it yesterday,it screams on top and needs a little more on bottom.I still got it a little rich on bottom.I going to get some stiffer clutch springs and alum. shoes for the race next sat.and see how that goes.I couldn't run a 6 min. qualifer without pitting for fuel so it's not getting great mileage either, this is on a track that you run wide open most of the time.

Chris Peralta 06-27-2011 06:32 AM


Originally Posted by daniel.cordes (Post 9304365)
Quick update!!

Good evening,

well the engine is completely apart now and it looks really well and healthy. A nice layer of oil was coating the engine and everything felt really smooth and nice. Chris, there were only one shim! And aznitronut, the exhaust does not seem to leak anywhere. However, the engine is only sealed with rubber rings here and there so I'm gonna reseal it completely and slime it here and there. So what is yet left to do?! Plugs are coming, sealing is soon done, exhaust is not leaking, internal parts of the engine are good...

Which fuel did you guys find better? RB:s own fuel or OŽDonnell?

Daniel


There really needs to be 2 head shims. Both the shims are copper shims so it's possible they are stuck together.... check those again. If there is only one you will want to get another shim.

As for fuel I think the main thing is that it's fresh. From what I have heard both are great fuels so as long as it's not old fuel you should be ok. Also there can be fuel thats bad right from the hobby store, you never know how long it sat on their shelf.

Once you get it all back together it's going to just be tuning it to ensure it stays running.

Ginters 06-27-2011 07:03 AM

ran the c6 l2g at the weekend for the first time and all i can say is WOW!!

This thing is a sledgehammer burned most people on the straight and if i needed some grunt to help clear the jump boom it was there.

Didnt miss a beat all weekend either so its got the thumbs up from me for sure!


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