Lately I've been pondering all the different tricks to make a turbo spool faster and or to give the motor more bottom end.
I believe that at some point the law of diminishing returns will take effect and lots of money will be spend to only affect spool by a minor amount.
Keep in mind I'm not discussing the effects of most of these parts on ultimate top end power, just how the help with spool up.
The tricks I can think of off the top of my head are:
A twin scroll or divided turbine housing with matching manifold:
A twin scroll merge collector creates a turblent free area for the exhaust gasses to enter the turbine housing in even pulses at high velocities and low pressure drops.
Ceramic coated header/manifold, & turbine housing: Increase the amount of heat getting to the turbine wheel, allowing for a greater temp differential across the turbine wheel, and the hot gasses flow better supposedly creating quicker spool up.
Heat wrapped manifold and or turbine housing jacket: same as above
Turbo with a ball bearing center section: low amount of drag from ball bearing center section creates a quicker spooling turbo. Garrett claims ball bearing turbochargers spool up 15% faster than traditional journal bearings.
Thermal barrier coated pistons & combustion chambers. More heat is trapped in the cylinder, and thus pumped out the exhaust allowing more energy to reach the turbine.
Cyclone intake manifold: dual runner manifold supposedly blends the benefits of a long runner manifold's low end torque with a short runner manifolds top end power.
Higher compression motor: Higher compression leads to more exhaust gasses, and more power out of boost
Stroker kit. More displacement equals more exhaust gasses.
I have on purpose left out the high stall torque converter.
This came about in my general through process on how to build a daily driver A/T car that doesn't suck so much ass when out of boost. Given that living at high altitude makes this even worse.
I believe that at some point the law of diminishing returns will take effect and lots of money will be spend to only affect spool by a minor amount.
Keep in mind I'm not discussing the effects of most of these parts on ultimate top end power, just how the help with spool up.
The tricks I can think of off the top of my head are:
A twin scroll or divided turbine housing with matching manifold:
A twin scroll merge collector creates a turblent free area for the exhaust gasses to enter the turbine housing in even pulses at high velocities and low pressure drops.
Ceramic coated header/manifold, & turbine housing: Increase the amount of heat getting to the turbine wheel, allowing for a greater temp differential across the turbine wheel, and the hot gasses flow better supposedly creating quicker spool up.
Heat wrapped manifold and or turbine housing jacket: same as above
Turbo with a ball bearing center section: low amount of drag from ball bearing center section creates a quicker spooling turbo. Garrett claims ball bearing turbochargers spool up 15% faster than traditional journal bearings.
Thermal barrier coated pistons & combustion chambers. More heat is trapped in the cylinder, and thus pumped out the exhaust allowing more energy to reach the turbine.
Cyclone intake manifold: dual runner manifold supposedly blends the benefits of a long runner manifold's low end torque with a short runner manifolds top end power.
Higher compression motor: Higher compression leads to more exhaust gasses, and more power out of boost
Stroker kit. More displacement equals more exhaust gasses.
I have on purpose left out the high stall torque converter.
This came about in my general through process on how to build a daily driver A/T car that doesn't suck so much ass when out of boost. Given that living at high altitude makes this even worse.
