Originally Posted by Pattojnr
Hi guys, just wondering if anyone has run this motor, or has some info about it, i cant find any HP specs. it is the IFMAR version. looks great, and would be my first AAC engine. any run-in and tuning info is appreciated as well. thanks.
I had one 2 years ago and it was made by Sirio (Star Engineering), based on the Sirio Evo 2, and with Mauro Collari's hand mods, and a special low garvity cooling head. It was the most powerful .12 engine at that time.
Break-in as any engine. Since it has an AAC sleeve/piston you need to warm it up several laps before attempting needle tune ups.
Specs
Manufacturer: LAMBERTO COLLARI MOTORSPORT
Base: SIRIO Evo 2
Bore: 14.0mm
Stroke: 13.7mm
Crank: TURBO with 8.0mm inner dia.
Carburetor: 3 needles, composite/aluminum, Interchangeable Venturi 5.5mm
(Base Settings)
High Speed - 5.5 turns out
Low Speed - 3-1/2 turns out (Generally this should be flush with the end of the slide)
Mid Range - Flush then one turn out.
Sleeve: Hard chrome aluminum
Ports: 3 transfer + 1 exhaust
Bearings: Front 7X17mm, Rear 11.2X21 mm
Head: Turbo with 0.20mm + 0.10mm shims (good for 25% Nitro)
Cooling Head: 52mm dia LCG
Timing: Transfer:114º
Boost: 114º
Exhaust: 159º
Induction: 213º
Max Power: 0.83hp @ 33,700 rpm (SAE Corrected) with 20% Nitro
Max Torque: 29.0 oz/in @ 19,600 rpm (Sae corrected) with 20% Nitro
Max. RPM: 41,000
AFM