Stuff Of Legend

iTrader: (1)

Ok i see everyone talking about the nova 2015 w/5fin as an alternative to the BEST option OS T-2080,
but what about the picco/hipex 2069 any success with this pipe

Thanks

Valerio

I'm breakin my OS Speed, takes about 3 liters. Running at a temperature of 90 °, the engine begins to run fairly and reaches high rpm but at low rpm the engine has no power. Is this normal? The LSN is 4 and 1/2 turn out. could tighten more? Is this correct? Can i turn in it?

MantisWorx

iTrader: (28)

There is no particular "turn in" number due to so many variables (fuel, temp, plug etc etc) just try it and see, I have found just like others that turning the mid needle in an hour or two helps tremendously with this engine especially on the bottom to top transition.

Rick Vessell

iTrader: (10)

Your LSN could be too rich but there are many other variables. How aggressive is your clutch? A clutch that engages too early will 'bog' the engine and not let it make more power while accelerating.

Your temp of 90 is a little low also. When tuned for best performance, depending on weather,etc., you will probably see temps between 115 and 130. I always tune by sound and performance, not temperature. Too many factors can affect temperature to use it as the only guide to tuning your engine.

You want to have good, crisp acceleration, good smoke, a steady, low idle, and strong top end power.

Good luck!

alexlok

Just picked up this engine and was wondering what's the best glowplug to use for break in? RP7 or RP8? Or maybe even RP6?

Rick Vessell

iTrader: (10)

RP7 will work fine for break in. I use a RP7 for break in and then run the RP8 for racing.

sm4100

This will depend on other relevant factors such as air temperature, altitude and very much on air humidity %

I use RP7 since day one and did break-in very nicely.

I couldn't get any better performance with RP6 or RP8 on my local track, however the factors here never change too much, weather is always slightly same:

Air temperature always between 28-35 Celcius
Humidity always between 60-85%
Sea level

I can't say much about cold weather or high altitude as I never tested this specific engine under these conditions.

Jlowery

Hi all I have a kyosho V one S GS15 motor single speed I'm after a 2 speed to get more top speed is there anyone out there that can help me?? Willing to buy thanks

alexlok

Thanks to Rick and sm4100 for your responses.

I'm playing in humid Hong Kong. Temp over 30 degrees celsius (rising to 34 degrees later in summer) and humidity between 70% to over 90%.

Will probably break in with rp7 first then experiment with 7 and 8 to see what gives me better performance

alexlok

When breaking in this engine do you guys just leave the needles as they are as they come from the factory?

sm4100

Yes leave them as they come but after some tanks you should lean just a little bit just like a normal break in procedure. Make sure you heat the engine 70-80 degrees before 1st run as this engine comes very tight and you may scratch the sleeve if the engine is not pre heat.

Hot air gun is the best but if you dont have one a hair dryer very close to the cylinder head also works. Just dont blame me if you burn the hair dryer .....

I broke in the engine on stand and it still delivers amazing power after 4 galons

alexlok

Thanks for that. I do intend to use the heat cycle method of break in, but I'll be mindful of leaning out after a couple of tanks.

alexlok

Anyone know what the life expectancy of these engines are? I know it would be dependent on one's usage but I'm looking for what one would look out for or considerations as to when an engine ought to be replaced by a new one.

rossb

I just got a 21XZ-R VII (not a speed tuned) and a THS on-road pipe for an MRX5. Has anyone run these engines on 20% fuel? Will it make good power with 20%?

Patrick_Head

iTrader: (1)

The difference is negligible. I run roughly 20% fuel (mix of 16 and 25 as the fuel i like does not come in 20%) in o.s speed zac version, runs well with stock shims and rp7 plug.

Not sure about that pipe, best to use the t-2080. you can get the pipe/manifold set for about $100 from Japan.