That's actually a perfect way to describe it Joel!
In Jon's case I'm only guessing his Turbo is for a much larger motor to be moving enough air for 450hp at such a small trim!
Jon: Very welcome!
Probably find your Turbo is for a 6+ litre motor :)
Joel: There's a LOT of "black art" involved with Turbo sizing that's really just math, once you find the formulas it almost makes sense I just wish they would settle on 1 set of end user terminology to describe them...
LOL this is what I meant in another thread when I said it's important to find out exactly what size wheels are in a turbo when you buy it!
You could have a 50 trim on a slightly larger wheel than stock and then you have your 50 trim on a 3" wheel whick will flow a pile more!
I can...
AM: You just measure across the blades.
Joel: No the 50 trim is just the relationship of big to small.
You could have a 1/2" bigger big and 1/2" bigger small and it would still be 50 trim!
LOL what I meant is to get the 40% increase in flow with a 50 trim it has to be a BIG wheel on the compressor side!
Just curious how big and to see what it takes say per 10% increase in flow = xx bigger diameter! ;)
Saw it happen a bit in the old days with SBC's, a lot depends on how it's been fitted.
Way I've been doing em for many years is to clean the hole in the block and if needs be give it a light sand in a round and round motion NOT in and out.
I then grab the Permatex #4 hard setting and a...
Joel: I don't think that's a 50 trim ;)!
Sounds MUCH larger!
It might be a 50 trim but with bigger IN and EX sizes which would explain the difference in power you describe! ie: A much Bigger Comp wheel.
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