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RE: Official RB Engine Thread! - 11/17/2007 7:23:27 AM   
snoking16



Posts: 2052
Joined: 11/19/2005
From: Kenmore, WA, USA
Status: offline 		yeah...just did a google search for RB 523 and i stumbled accross it. with a higher rev it would increase performance....interesting. i dont have a bump start but it might be worth investing in.

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RE: Official RB Engine Thread! - 12/6/2007 4:48:28 PM   
nothinbetr2do


 

Posts: 2492
Joined: 2/27/2006
From: elkton, MD, USA
Status: offline 		hi guys, i want to put a 523 in my revo. but i need it to be a bump start. snoking16 posted a place to get back plates. and i was wondering if you guys can tell me if this will work? or is it for the wrong motor. i need it to fit a 523 http://www.rcconsumables.com/osc/product_info.php?cPath=20_28_128&products_id=1100&osCsid=la3l882noh4216i43l8qftnpo5

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just say no to "shelf queens"

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RE: Official RB Engine Thread! - 12/6/2007 5:24:24 PM   
snoking16



Posts: 2052
Joined: 11/19/2005
From: Kenmore, WA, USA
Status: offline 		its in the RB section so im guessing it will work.

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RE: Official RB Engine Thread! - 12/6/2007 7:32:36 PM   
ttoks



Posts: 3665
Joined: 3/15/2007
From: leongatha,VIC, AUSTRALIA
Status: offline 		that is indeed the right part.

and the bump start back plate will get you a little more power, a few more RPM's, but the biggest gain is very crisp throttle response.

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RE: Official RB Engine Thread! - 12/6/2007 7:39:08 PM   
nothinbetr2do


 

Posts: 2492
Joined: 2/27/2006
From: elkton, MD, USA
Status: offline 		thanks guys, think i'm going to go for it

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RE: Official RB Engine Thread! - 12/6/2007 7:43:29 PM   
snoking16



Posts: 2052
Joined: 11/19/2005
From: Kenmore, WA, USA
Status: offline 		gamesbeer...tell me how it goes im thinking of doing the same thing.

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RE: Official RB Engine Thread! - 12/6/2007 7:46:22 PM   
nothinbetr2do


 

Posts: 2492
Joined: 2/27/2006
From: elkton, MD, USA
Status: offline 		ok, will do

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RE: Official RB Engine Thread! - 12/15/2007 4:18:48 PM   
squeeguk



Posts: 495
Joined: 3/21/2004
From: Camberley, UNITED KINGDOM
Status: offline 		Hey guys, wonder if you can all help me out. I got a 523 a few weekends ago and thanks to the English weather haven't been running it much. I have around 10 tanks through it already. It has been running very rich, good plume of smoke, etc. I used the heat cycle method for the break-in. As this was done in straight up and down runs, no issues.

On about the 7th tank, I went to a large bashing ground we have which has a large flat piece of tar and decided to give it a little, still running in of course.

This is where I discoverd I had a leaning and richening issue when turning. On right turns it gets richer / stays the same, but on left turns it leans out dramatically. I have re-routed my fuel lines as some people were saying something about the tank being beside the engine being the problam, I also extended my pressure line a lot.

I gave it a quick burn this afternoon to check if it's all working fine and find that the issue is still there. Apart from going single steering servo, Tekno RX conversion and a Mugen MBX5-T tank, what else can I do to sort this out?

Here are some pics of my fuel line setup:





Also, after giving it a little WOT, I noticed that on rev-down the engine was like 'popping' like it was burning unburnt fuel. I believe this is a symptom of running too lean, is this correct? I am at the moment running about 6 turns out. I really don't want to pop this engine as it needs to last me. What are the symptoms of a leaking front bearing as last time I used it, I put a fair dollop of after run oil in and a few days later there was a puddle under the engine near the crank?


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Traxxas Revo 3.3 with RB TM523 - Spektrum DX3.0
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RE: Official RB Engine Thread! - 12/15/2007 4:42:30 PM   
dprocca99


 

Posts: 66
Joined: 12/6/2005
From: Deer Park, NY, USA
Status: offline 		had an old tm323 laying around so I ported and polished it..i will let you guys know the results and show some pictures when finished

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       Post #: 159

RE: Official RB Engine Thread! - 12/15/2007 6:01:55 PM   
stadium truck freak


 

Posts: 553
Joined: 12/15/2006
From: london, UNITED KINGDOM
Status: offline 		so i take it the 323 is really crap compared to the 523

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RE: Official RB Engine Thread! - 12/15/2007 10:01:13 PM   
snoking16



Posts: 2052
Joined: 11/19/2005
From: Kenmore, WA, USA
Status: offline 		its not crap at all. its really a great engine. its just like when os came out with the .21 TM. the .18tm is still a great engine. the newer modle just has more power. the only difference is the displacement is the same in the 323 as the 523. the thing they did to get more power is have more ports.

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RE: Official RB Engine Thread! - 12/15/2007 10:01:38 PM   
beer=food


 

Posts: 1276
Joined: 11/26/2007
From: hervey bay, AUSTRALIA
Status: offline 		Well yea ! Thats like comparing a 4 cylinder to a 6 ! LOL ! Sqeekguy, why do you have such long fuel lines, you add resistance, needing more fuel backpressure to keep fuel pressure up to carby, the G-forces in sharp corners would be throwing that fuel line tube around, because of its mass with fuel in it, giving you an uneven fuel pressure at the carby, minor as that may seem, you have a niggly problem, its worth shortening them lines, it cannot hurt at all.There should be no pressure difference ,no matter which way you turn, the tank being where it is , is no issue, the tank is not offset at a higher or lower level to the engine and the outlet does not face left or right, the fuel is drawn straight 'up' and out, the effects should be unseeable.Shorten your tube, dont run it flat at the front of your chassis, having flat side to side lengths of fuel line makes the fuel in the line vulnerable to gravity forces in corners, think virtical, get your tube to do a virtical loop through the designed clips and straight into carby, halve the length of the line as well, place the fuel filter on the lower clip, but think virtical not horizontal with fuel line, the fuel in it has a small mass and is effected by G-forces in corners.The colder it is, the 'thicker' your fuel will be, definately shorten your fuel lines.

< Message edited by beer=food -- 12/15/2007 10:02:44 PM >

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RE: Official RB Engine Thread! - 12/15/2007 10:05:45 PM   
snoking16



Posts: 2052
Joined: 11/19/2005
From: Kenmore, WA, USA
Status: offline 		beer=food...its nothing like the difference between a 4 and 6 cylinder. the displacement is the same in both engines. the 523 is just a built .23. the port timing and number of ports is the difference between the 323 and 523. and the 323 is still made of the same high quality as the 523.

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RE: Official RB Engine Thread! - 12/15/2007 10:58:10 PM   
squeeguk



Posts: 495
Joined: 3/21/2004
From: Camberley, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: beer=food

Well yea ! Thats like comparing a 4 cylinder to a 6 ! LOL ! Sqeekguy, why do you have such long fuel lines, you add resistance, needing more fuel backpressure to keep fuel pressure up to carby, the G-forces in sharp corners would be throwing that fuel line tube around, because of its mass with fuel in it, giving you an uneven fuel pressure at the carby, minor as that may seem, you have a niggly problem, its worth shortening them lines, it cannot hurt at all.There should be no pressure difference ,no matter which way you turn, the tank being where it is , is no issue, the tank is not offset at a higher or lower level to the engine and the outlet does not face left or right, the fuel is drawn straight 'up' and out, the effects should be unseeable.Shorten your tube, dont run it flat at the front of your chassis, having flat side to side lengths of fuel line makes the fuel in the line vulnerable to gravity forces in corners, think virtical, get your tube to do a virtical loop through the designed clips and straight into carby, halve the length of the line as well, place the fuel filter on the lower clip, but think virtical not horizontal with fuel line, the fuel in it has a small mass and is effected by G-forces in corners.The colder it is, the 'thicker' your fuel will be, definately shorten your fuel lines.


Cheers mate, but I had the lines short, like you mentioned and had the same issue, I tried this only because someone mentioned something about the fuel running into the pressure line and cauing uneven pulses. I will shorten them again as I don't like so much fuel line around the car and it's made absoutely no difference at all. I cannot understand how some people say that havng a different tank changes things so dramatically to get rid of the problem. It is really noticeable the rich and lean turning.

What setup do you have on yours? Could it maybe be that I am running it too rich and thus it is so noticeable? I am seriously considering doing the single steering, rx box and MBX-5T conversion just to get rid of it, just crazy that I am having to spend all that money just cos I bought a better engine????



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Traxxas Revo 3.3 with RB TM523 - Spektrum DX3.0
Hobao Hyper ST Pro - Spektrum DX3.0

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