Full story of the stroker kit with charts and graphs

The lightest S2000 Stroker kits on the planet!

• >35% reduction in rotational weight vs OEM parts
• >30% reduction vs stroker kits using OEM pistons
• >25% reduction vs other stroker kits
• Pistons weigh ~240 grams vs 350+ for OEM, 300+ aftermarket
• Pins weigh ~60 grams vs >100+ for OEM and aftermarket
• Top end rods weight 110-145 grams vs ~200 for OEM and >175 for aftermarket

Lighter rotational weight enables..

• ~3-5% more power from less HP lost due to reciprocal weight acceleration and friction reduction (we have customers making 10-20 more hp with our kits vs their previous kits)
• ~10% more power potential from higher redline support (9K for 99mm stroke, 10K for 90.7mm)
• Significantly faster engine response
• Noticeably less vibration
• Less force on the crankshaft
• Less bearing presses vs OEM, even with higher stroke and redline
• Longest stroker engine life

Options

• WPC piston coatings
• Either 99mm (needs modified 99mm k Series crank) or 90.7mm stroke (uses OEM or Callies cranks)
• We can provide modified K series 99 cranks

The kits are a premium vs other stroker kits, but have the potential for 10-15% more power vs other stroker kits and 30-50% more power vs OEM.
Designed for NA only

 

Hi I have a question about your 10k rpm kit. I see you are using 90.7mm stroke which have 30.23m/s piston velocity at 10k rpm, and ap1 using 84mm stroke with 25m/s velocity at 9k rpm, I want to ask will be better that using 84mm stroke with less reciprocal weight will be better for reliablility. maybe larger Bore with 84mm stroke will be better for a NA engine, since more RPM means more Horsepower. I have check out those other brands engine spec like 992 GT3RS or C8Z06. both of them use stroke less than 83mm but have larger bore to achieve higher horsepower/liter.

 

Great question.

Yes, the mean piston velocity is high, but here is a great article by a well respected engineer and journalist that limiting piston speed is a myth.
Friction is the only with concern with piston speed and with friction coatings like NSC sleeves and WPC pistons eliminates that concern.
The larger concern is piston acceleration and weight of internals creating high rod forces, bearings pressures, crank forces and vibrations.
Our key design goal is light weighting through advanced materials, reducing compression height and iterative dimension reduction enabled a >30% reduction in reciprocating weight.

So our rod forces, bearing pressures, crank forces and vibrations are less than AP1 at 9K, even with the 90.7mm stroke and 10K RPM.

 

15 Halo Stroker kits sold

Please email us at urge(at)urgedesigns.com for questions or quotes