Quote:
Originally Posted by farmtruck09
Drive pressure goes whacky though. And need 87mm to go higher
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This is why I just picked up a cast 467/87/.9 from FI to replace my cast 67/83/.9.
Tried a larger exhaust housing on the 83 (1.1) and lost more than I gained all around. I'd have to look thru my notes to see how much drive pressure I lost, but it was only a couple psi iirc. Not enough to justify the added lag (I tow). I'm expecting good things with the 87, but it'll be a while until I get it on and dynoed again- with much better tuning this time around, but can probably do a pull with my old tuning to compare apples to apples.
The 472sxe really interest me but I don't need that much air. For a truck shooting for 800-900, it might just be the ticket... whatever you do, I'd def go bigger than 83 on the turbine side.
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2018 2500 crewcab, 4wd, g56, mostly stock
2007.5 2500 quadcab, 2wd, G56, SouthBend sdd, 625s, Exergy 10mm cp3 w/60% overs, cast 467.7/83/.9, BD inline brake, Hamilton 103 springs w/e.duty pushrods, Caltracs 743/1502 on old tuning
Last edited by ndaniels; 12-30-2017 at 11:18 AM.
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