like it says im interested in knowing whats the trim on a stock turbo i couldnt find that out ne where.
JT87NA said:Hope this helps:
Trim
Trim is an area ratio used to describe both turbine and compressor wheels. Trim is calculated using the inducer and exducer diameters. As trim is increased, the wheel can support more air/gas flow. Use these formulas when calculating trim
[(Inducer Diameter)^2]/[(Exducer Diameter)^2] * 100= Compressor Trim
Flip it around to figure out Turbine Trim.
If my calculations are right it is between 46 and 50 with the data from the above links.