2016 Ford F-150 XLT 2.7L
Not sure if any of y’all have seen these bad boys. Makes me want to pop my compressor covers off and paint them.
Yes, that’s exactly right I believe. More blades means less air, but, more transient response. I mean, CRPs Powermax upgrades are 5 blade. There’s a reason they used a 5 blade instead of a 11 blade. 5 blade is going to have a ridiculous top end flow. They’re race only turbos pretty much. Also, less blades means they are louder. More blades are quieter with spooling sound.Usually more than 7 blades will lower the amount of boost you can top out at but will spool much faster. They also can surge the easiest. I thought more blades meant less air. At least that’s what precision turbo taught me.
Exactly. CRP said 6+6 blade was the best. On my stage 4s, there’s a lot of room between each blade, allowing it to really cut that air and grab it.I believe the blades on 11 blade(Which is what the Garrett GTX turbos have) get in the way of each other. The blades are so tight that the air can't backfill before the next blade passes once the turbo is flowing a lot of air.
But garrets new G-series turbos run 9 blade on the small end and what looks like 13 blade at the top end and they flow a good amount of air for their size. 50 lbs/min out of a 48 mm/60mm compressor.
It depends on the size of the compressor. If you have a huge diameter then the blades will be spaced farther apart and the turbo will spin at a much lower RPM.