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R/C Tech Forums (https://www.rctech.net/forum/)
-   Onroad Nitro Engine Zone (https://www.rctech.net/forum/onroad-nitro-engine-zone-71/)
-   -   MAX XXL3 .12 engine (https://www.rctech.net/forum/onroad-nitro-engine-zone/243417-max-xxl3-12-engine.html)

rx7ttlm 01-02-2009 05:59 PM
Thats interesting.. my XL3 and XXL3's came with 0.3mm head shim. XL3 is rad, but I have high hopes for the XXL3. Larger crank bore than the XL3, maybe after Nigel breaks in my XXL3 while I am in colorado for some "personal" business we can do some side by side testing of the XL3 vs XXL3. Two NT1's and Two maxs :) lol.. good times

also the XL3 and XXL3 come shimmed for up to 25% nitro. 30% add a 0.1mm shim etc. Or you can do the old offroad trick, add 0.2-0.3mm of shim to take the power down a bit and add more when it starts getting soft. obviously tune and plug will be different.

Cheers,

Patrick

rx7ttlm 01-02-2009 06:00 PM
Originally Posted by Team Kamikaze (Post 5214622)
The Max pipe 2602 is the best matching pipe for your engine, and regarding the glow plug to use, I would recomend Nova Rossi 6TGF or the Ninja no.6 cold.
Sam- order me a set of engine Orings for the XL3 and the XXL3. Tanks

rx7ttlm 01-02-2009 06:05 PM
Originally Posted by TomB (Post 5196138)
lol probably. the headbutton on the sl3 is different to the new XXL3 as well. i think the XXL3 uses the standard nova headbutton instead of that funny weird button that was used in the SL3.


anyone have any advice if the head clearance is safe with the XXL3? a .1 shim as standard seems a bit low to me.

i know that headshims has to do with heat, % of nitro, sea elevation and a whole heap of other things, but any advice?

i'm thinking to stick to .3mm shims just to be safe. anyone played around with putting shims under the sleeve to changing the timing?
and if your seriously thinking of playing with crank timing by shimming start with an engine that sucks lol. IMO.

cheers,

TomB 01-02-2009 11:11 PM
Originally Posted by rx7ttlm (Post 5241776)
Thats interesting.. my XL3 and XXL3's came with 0.3mm head shim. XL3 is rad, but I have high hopes for the XXL3. Larger crank bore than the XL3, maybe after Nigel breaks in my XXL3 while I am in colorado for some "personal" business we can do some side by side testing of the XL3 vs XXL3. Two NT1's and Two maxs :) lol.. good times

also the XL3 and XXL3 come shimmed for up to 25% nitro. 30% add a 0.1mm shim etc. Or you can do the old offroad trick, add 0.2-0.3mm of shim to take the power down a bit and add more when it starts getting soft. obviously tune and plug will be different.

Cheers,

Patrick
strange, mine only came with .1mm headshims. i've shimmed it to .6mm for break-in. i'll eventually move down to .4mm

mrgsr 01-03-2009 03:12 AM
TomB run it with .1 shim
all my novas, 353 murnan, 3ct tuned and the 3t kickass are all 1mm

TomB 01-03-2009 06:56 AM
Originally Posted by mrgsr (Post 5243272)
TomB run it with .1 shim
all my novas, 353 murnan, 3ct tuned and the 3t kickass are all 1mm
ok dude will do. Why are people saying their XXL3's came with .3mm shims though?:weird::confused:

Team Kamikaze 01-03-2009 11:17 AM
All .12 Nova Rossi engines, including the MAX and JP comes shimmed for 16% nitro fuel, which is .3mm, it's an aluminum shim.

G87z 01-03-2009 12:05 PM
Originally Posted by Team Kamikaze (Post 5244312)
All .12 Nova Rossi engines, including the MAX and JP comes shimmed for 16% nitro fuel, which is .3mm, it's an aluminum shim.
So its safe to say .4mm would be correct for 20%?

Team Kamikaze 01-03-2009 12:22 PM
Originally Posted by G87z (Post 5244460)
So its safe to say .4mm would be correct for 20%?
Yes, you are correct.

TomB 01-03-2009 08:54 PM
Originally Posted by Team Kamikaze (Post 5244312)
All .12 Nova Rossi engines, including the MAX and JP comes shimmed for 16% nitro fuel, which is .3mm, it's an aluminum shim.
yeah that's what i though. i'm pretty syre it only had .1mm. i'll double check it later, maybe the silver one got stuck to the button.

DS Motorsport 01-04-2009 03:16 PM
If you want to be sure check the squish by putting a piece of solder between the piston and headbutton, a safe squish for a nova engine is 0.5-0.6mm any lower than that and you have a high change for detonation.

I would check it first before running the engine, despite people overhere saying it's safe with .1 mm
If the engine is new, first heat the engine and then give it a full rotation with the piece of solder in place.

TomB 01-04-2009 07:24 PM
Originally Posted by DS Motorsport (Post 5249048)
If you want to be sure check the squish by putting a piece of solder between the piston and headbutton, a safe squish for a nova engine is 0.5-0.6mm any lower than that and you have a high change for detonation.

I would check it first before running the engine, despite people overhere saying it's safe with .1 mm
If the engine is new, first heat the engine and then give it a full rotation with the piece of solder in place.
ok thanks, will do.

kickass 01-05-2009 12:18 AM
Thomass
 
Originally Posted by TomB (Post 5242913)
strange, mine only came with .1mm headshims. i've shimmed it to .6mm for break-in. i'll eventually move down to .4mm
Thomas just run .6 This Is Really Good, also turn your shocks upside down, the car works better.
are you gonna race this year????

mrgsr 01-05-2009 04:05 AM
I just checked my max xxl3 and it came with .1mm shim only
no aluminium shim

TomB 01-05-2009 08:12 PM
Originally Posted by kickass (Post 5251350)
Thomas just run .6 This Is Really Good, also turn your shocks upside down, the car works better.
are you gonna race this year????
yeah the state titles, and a few clubbies before then obviously to get the car ready.


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