stage3 turbo size

[jersturbo]

actually wih my thermal coated turbine side t3/t4, here was not so much noticible difference, as there was from the clipping (which was done later on)...thermal coating i believe does help, but just is not a butt-dyno noticible difference in my experience

Quote: Originally Posted by Tex

yes, but that has to do with the clipping not the coating. the coating helps noteciably iff you compare before and after with the same wheels. but it does help pickup 200-300rpm

[Tex]

did you get just the snail coated, or the manifold as well

[jersturbo]

that one was coated cast manifold (T2 turbo dodge PNPd) the 3 turbine housing (0.63 a/r) and the O2 housing also...

...did you do other mods at the time you installed the coated manifold, in which case that can change things

Quote: Originally Posted by Tex

did you get just the snail coated, or the manifold as well

[Tex]

i understand that changing more htan 1 item at a time will throw off results. im just stating that it helps

[duster360]

Quote: Originally Posted by Tex

ceramic coating is key in keeping the spool up. extra heat in the manifold keeps the gas density low, which helps to spool the turbo up faster

right on the effect of the coating ; wrong on the reason.

Kinematic viscosity goes up much faster with temperature than density goes down. At 70F its 1.64e-4 and at 1500its 1.51e-3 ft^2/s. Over 9 times "thicker"!! It might be less dense but it is more resistant to direction change. By comparison density decreases by a factor of just under 4.

Hotter gas does have more thermal energy availible(duh) to be transfered to the turbine and since its "thicker" it has a bit more inertia. If you keep the heat from being transfered to the ambient, through the housing, more energy is availible to turn the turbine.

Dave

[duster360]

Quote: Originally Posted by duster360

Quote: Originally Posted by Tex

ceramic coating is key in keeping the spool up. extra heat in the manifold keeps the gas density low, which helps to spool the turbo up faster

right on the effect of the coating ; wrong on the reason.

Kinematic viscosity goes up much faster with temperature than density goes down. At 70F its 1.64e-4 and at 1500its 1.51e-3 ft^2/s. Over 9 times "thicker"!! It might be less dense but it is more resistant to direction change. By comparison density decreases by a factor of just under 4.

Hotter gas does have more thermal energy availible(duh) to be transfered to the turbine and since its "thicker" it has a bit more inertia. If you keep the heat from being transfered to the ambient, through the housing, more energy is availible to turn the turbine.

Dave

I just re-read this. MAN! I sound like a tool!

[jersturbo]

Quote: Originally Posted by duster360

I just re-read this. MAN! I sound like a tool!

LMAO