if someone would be kind enough to explain the difference in trim coding like a "p" trim or "e" and so on. thnx:1zhelp:
Compressor Trim
- Thread starter Boss302
- Start date
T4 is labled O-Q for trim sizes.
O -trim is smallest of T-netics turbine wheels. Q-trim is biggest.
T3 uses Staged sizes, stage 5 being the largest.
The trim is a measurement of exducer area over inducer area, exducer being the small side of a turbine, where the exhaust exits. Inducer being the large side where the exhaust leaves the volute and enters the turbine.
A large "trim" will have a larger exducer with respect to the inducer.
That is a turbine could theoretically have a 90 trim, which means that the outlet is 90 percent of the area of the inducer. In a T3, this might be called stage 5, for the least restriction of exhaust on the way out.
A T4 may have this same 90 trim, but it's much larger than a T3, but the ratio is the same, and they might call this Q-trim.
Bigger exhast trims lead to more lag, and also dictate the physical size of an exhaust housing. A stage 5 .63 ar T3 housing is much larger than a stage 1 .63 Ar T3 housing. That said, a .63 O-trim housing is comparable to a stage 5 .63 T3 housing.
But, whith Garret's GT series turbos, much of this nomenclature is becoming obsolete.
O -trim is smallest of T-netics turbine wheels. Q-trim is biggest.
T3 uses Staged sizes, stage 5 being the largest.
The trim is a measurement of exducer area over inducer area, exducer being the small side of a turbine, where the exhaust exits. Inducer being the large side where the exhaust leaves the volute and enters the turbine.
A large "trim" will have a larger exducer with respect to the inducer.
That is a turbine could theoretically have a 90 trim, which means that the outlet is 90 percent of the area of the inducer. In a T3, this might be called stage 5, for the least restriction of exhaust on the way out.
A T4 may have this same 90 trim, but it's much larger than a T3, but the ratio is the same, and they might call this Q-trim.
Bigger exhast trims lead to more lag, and also dictate the physical size of an exhaust housing. A stage 5 .63 ar T3 housing is much larger than a stage 1 .63 Ar T3 housing. That said, a .63 O-trim housing is comparable to a stage 5 .63 T3 housing.
But, whith Garret's GT series turbos, much of this nomenclature is becoming obsolete.
Depends on what Garrett you were going after.
The new GT series go in GT1000, GT2000, GT3000 and GT4000 series.
Also note that the larger the compressor wheel, the larger the turbine wheel must be to compensate for more torque to drive the compressor wheel.
The new GT series go in GT1000, GT2000, GT3000 and GT4000 series.
Also note that the larger the compressor wheel, the larger the turbine wheel must be to compensate for more torque to drive the compressor wheel.
MDCmotorsports said:
Not to mention you need the larger Turbine section to physically flow the Volume of Gas the Compressor is flowing through the motor or it will choke off power.