revolicous

can u run 30 % with the factory head shims or should i just stick with 20 percent????

jonenydal

This is what Rody at RB Products said about thr TM323
If you use 30% nitro you need to add 1 shim of 0.1mm
Another good place to search for possible answers are the Forum on the RB Products side (http://www.rbproducts.com/mainEn.php)
Hope this may help you

revolicous

THANKS FOR THE INFO BUT IF U READ WHAT I SAID I HAVE A 523 NOT A 323

hugh.jeego

calm down there revolicous. he stated that rody's comment was about the tm323. ask in the rb forums cos not many ppl have the tm523 here. ihave one but i dont know the answer to your question

jonenydal

I read what you said and i also read the manual for both the 323 and 523, where both the manual´s state´s the original head shims are usable until 25% nitro. And this is what i found under FAQ in the Support section at RB-Product. As earlyer mentioned "Another good place to search for possible answers are the Forum on the RB Products side (http://www.rbproducts.com/mainEn.php) "

FAQ: For how many nitro are the engines set


The .28 engines can be used up till 25% nitro without making any modifications to the engine.
The .21 engines can be used up till 25% nitro without making any modifications to the engine.
The .15 engines can be used up till 25% nitro without making any modifications to the engine.
The .12 engines can be used up till 16% nitro without making any modifications to the engine.
If after you would like to use the engine with a higher nitro content(which will bring you more power but makes the setting of the engine also more delicate), then it is needed to add an additional head-shim of 0.1mm of each 5¨% of nitro content more in the fuel.

Another important information is that the more nitro you use the more the engine is stressed and so you need to be more careful with your carburetor settings...

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Maybe this is more to your liking.

mobster

yo bro, just use the 30% in the rb523, i have one and it runs like a beast with it. and with no mods.
30% will not do anything to your engine. trust me it will run better with 30 and keep the engine cooler.

mobster

sorry i meant i have a 323 not the 523!! but it should be the same thing. had the engine for awhile and no problems using 30%

R/C Madman

My Feedback: (1)

You need to add a head shim if your going to run 30%. Your compression will increase too much and cause your engine to ware out quicker. The 323 and the 523 are not the same engines (the 523 has different porting) so check and see if the manufacturer recommends using a shim or not.

revolicous

yes rb does recomend adding a 1 mm shim for 30 percent usage with the 523 and the 323

beelzebubishere

My Feedback: (1)

Imagine that......."jonenydal" trying to help out, and gets his head damn near bitten off, revolicious ends up with the SAME answer, and doesn't even offer up an apology....gotta be another juvenile....

revolicous

easy there kliff my reply 2 joneydal was not meant 2 bite his head off i simply stated that i had a 523 not a 323 i even said thanks for the info so how was that post biting his hea doff in any way???? also i had allready read in the rb forums that u needed 2 add a shim but also know that some manufacturers will say that 2 keeep u well on thge safe side of things and just wondered if any one had tried it also im in no way shape or form a juvenille ive been building rc cars for quite a long time and am 39 years old

jasje

Ok now the real question, what type of shims should you use then? And where to put them?

hugh.jeego

yea what is a "shim"? i mean is it any 1mm thick sheet metal? i assume not actually because of heat dissipation issues, but can you buy them? or do you need to have them made?

beelzebubishere

My Feedback: (1)

That reply, in all caps... "THANKS FOR THE INFO BUT IF U READ WHAT I SAID I HAVE A 523 NOT A 323 " is the same as yelling, or a display of attitude....not a beleivable," thank you." Sorry about mistaking you for a juvenile, but your retort, definitely resembled that of a pre-teen or 2 we've all seen here. Since you're an experienced builder, I'm sure you'll figure it out, as the other guys are just having a little fun with ya....

Oh, BTW....I always take it easy...LOL!

revolicous

u should be able 2 have your local lhs get them for u or contact rb directtly for the shims

revolicous

thats cool kliff and sorry i didnt realise the original post was in caps my mistake much better 2 be seeing a few lols after your post though