Hey guys what exactly does the trim on the turbo do? I was going to get a 57 trim turbonetics but someone told me a 57 trim wont spool until 4k rpms... my crx will be a daily driver and probobly will never se past 6 grand so i was hoping to get something that will spool around 3 grand. does that mean i need a lower trim like a 50 trim? whats the downside to getting a lower trim turbo that spools faster?

 

lower trim sizes mean smaller wheels that move less air....since there is less resistance, they spool faster, but dont move as much air

there is a trade-off

spool time<------->airflow

although there are small ways to get around it

 

Depends on what motor is in your car, and what you want it for. A stock block is not going to move enough air to really push a big turbo. If you just want a quick pickup that peaks quick, do a .48. I ran a .54 compressor and a .63 turbine on a t3/04e. I had traction issues until about 50 mph making 300 whp. So in my case even with the larger laggier turbine it still made plenty of power down low, and was a lot of fun on the highway.

 

^^a stock block will move just as much air as a built block unless the head has been ported...the stock block will not be able to handle a bigger turbo

i had a T3/T04E 60trim .63 ar and it was great for my setup....

 

ok thanks for the help guys my setup is a stock d16a6 so i guess ill run like a .48 or .50 trim on a t3/t4 for quick spool. it will spool quicker but it will take longer to get peak boost? am i saying this correctly?