Air Filter - LRP DAVIDE ONGARO ZZ.21C Manual De Instrucciones

USER GUIDE
ZZ.21C CERAMIC LONG STROKE
BEST.-NR. 32124
Dear customer,
thank you for your trust in this LRP product. By purchasing a LRP nitro engine, you
have chosen a high-performance and highly sophisticated product, which doesn´t
make any compromise between maximum performance and easy tuneability. We hope
you enjoy your new engine.
Please read the following instructions carefully before you start using your LRP ZZ.21C
Ceramic Long Stroke engine. This user guide contains important notes for the installa-
tion, the safety, the use and the maintenance of this product. Thus protecting yourself
and avoid damages of the product.
Proceed according to the user guide in order to understand your LRP ZZ.21C Ceramic
Long Stroke engine better. Please take your time as you will have much more joy with
your product if you know it exactly.
This user manual shall be kept in a safe place. If another customer is using this pro-
duct, this manual has to be handed out together with it.
1. Specification
Engine size
Bore
Stroke
Number of ports 3 + 1 (3 x transfer-, 1 x exhaust-port)
Main bearing
14.0mm / DLC coating / precision balanced /
Crankshaft
Crankcase Black XTEC C6 .21 Heavy-Duty Competition
Piston Specially lightened, high-silicium alloy
Knife-edge shaped, extra strong Aluminium,
Connecting rod
Glow Plug Hot Turbo style, LRP Turbo WT3 (No. 35135) included
XTEC thermal protected WorksTeam carburetor,
Carburetor
Aluminium 6, 6.5 and 7mm inserts included
Power output*
Max. RPM*
Weight
Suitable for 1/8th Offroad Buggies and Truggies for competition use
*figures may vary depending on used fuel, muffler and tuning.
2. Fuel
Never use regular gasoline or airplane fuel. Use fresh 2-stroke model car fuel only!
We recommend using our line of LRP Energy Power fuels (No. 35712: 25% 1L / No.
35732: 25% 3,5L). For the LRP ZZ.21C Ceramic Long Stroke engine, we recommend a
fuel with 25% nitro. Never exceed 36% nitro. A higher nitro content will decrease your
engine's lifetime.
3. Airfilter
A good airfilter is very important for the life of your engine. Never run without an airfil-
ter, as quick and permanent damage will result! Don't forget to impregnate the airfilter
with a suitable oil before usage. Carefully clean the airfilter at least after every tenth
tank. Replace the airfilter every 3 litres (~1 gallon) of usage.
We recommend the use of our LRP Hi-Flow 2-Stage oval airfilter (No. 36565) together
with our LRP Hi-Flow airfilter oil (No. 36590).
4. Glowplug
Use only Turbo style glow-plugs (also known as conical style plugs) for this engine.
We recommend using our line of high-quality LRP Platinum / Iridium WorksTeam glow-
plugs (No. 35135 - No. 35145, availabe as WT3 and WT4). Check them frequently and
never run with worn-out or old glow-plugs since they could damage your engine. They
turn dull when your engine was too lean and should be replaced. They should stay
MA00276 © Lautenbach Racing Products GmbH 2018
ENGLISH
.21 (3,49ccm)
16.27mm
16.80mm
Ceramic
with silicone insert
double bushings
2.99 HP
40.500 RPM
355g
bright like chrome. If the glowplugs wear out too fast, an additional 0.1mm shim bet-
ween burnroom and liner is recommended. Whenever you have trouble with the engi-
ne stalling for no reason, replace the glow-plug first!
TIP: Our LRP team always uses a LRP Platinum / Iridium WorksTeam WT3 (No. 35135)
plug for the LRP ZZ.21C Ceramic Long Stroke engine.
5. Exhaust system
Never run without a pipe since this will cause excessive overheating and may damage
your engine. A good pipe has a very huge effect on the performance of a 2-stroke
engine. For the LRP ZZ.21C Ceramic Long Stroke engine, we recommend using our
high-quality LRP Screamer-93 1/8 Off-Road Exhaust System (No. 36255) for maximum
performance.
6. Head clearance
We recommend a real head clearance between piston and burnroom of about 0.60-
0.70mm (0.024-0.027") or more, when the piston is at Top Dead Center. The real head
clearance can be calculated as follows:
Real head clearance = Thickness of head shims + 0.25mm*
We suggest to start with 0.35mm (0.014") shims underneath the combustion chamber.
You may want to adjust the shims depending on nitro-content (see table) or track lay-
out. Large tracks may require an extra 0.10mm (0.004") shim to reach higher topspeed
and improved fuel consumption, but this will decrease acceleration slightly.
Nitro content
Real head clearance
Head shims
* (that's due to the internal construction of the engine and the compression of the
head shims, when the cooling head is mounted)
7. Carburetor
The factory settings of the engine are as following and are a good starting point for
you, if you are not satisfied with your carburetor settings. Turn in the needles com-
pletely (Caution: Do not overtighten them!) and loosen them the required number of
turns again:
• Main speed needle (#3): 3 1/4 turns
• Mid range needle (#2): Exactly flush with the ball link.
• Third needle (#4): Exactly flush with the carburetor body
Idle screw (#1):
Adjusts the air flow when carburetor is ful-
ly closed. Turn CW for higher idle-speed
and CCW for lower idle-speed. Should be
open approx. 0.5mm.
Mid range needle (#2):
Adjusts the mid/low-speed flow rate of the
fuel. Turn CW for leaner and CCW for richer setting.
Main speed needle (#3):
Adjusts the main flow rate of the fuel (when the throttle is opened significantly). Turn
CW for leaner and CCW for richer setting.
Third needle (#4):
Should always stay in the factory setting exactly flush with the carburetor body and
should not be changed.
Carburetor venturi inserts:
In order to affect the fuel/air mixture, you can use different venturi inserts on this car-
buretor. These are to finetune your engine to different track layouts. There are three
different venturis coming with the engine: 7.0mm, 6.5mm and 6.0mm.
7.0mm has the most power, 6.0mm has the best fuel mileage.
Lautenbach Racing
Products GmbH
Hanfwiesenstraße 15
73614 Schorndorf
Deutschland
16% 20% 25%
0.60mm / 0.65mm / 0.70mm /
0.024" 0.025" 0.027"
0.35mm / 0.40mm / 0.45mm /
0.014" 0.015" 0.016"
2
36%
0.80mm /
0.031"
0.55mm /
0.022"
1
4
3
4