pgdsm

Ok so I'm looking at some different possibilities here. On a tight budget. Jst had to buy yet another vp ( bd refused to warranty my eight month old hrvp)
so I'm getting some 150's and don't tow much or often. Trucks a 6 spd.

So the Garrett bb gt3782 powermax stage 2 for 2x the price of a he351. But the he351 requires a new downpipe and some other little extra ( read a bit of extra $ than just the purchase price)

now from garrets site the bb Garret is a 59.1 journal bearing if I jst look up the gt3782. But under the turbo kit link it shows a gt37 powermax that is a BB turbo but not specs. Does any one know the specs? Would this be better with 150's than a he351 that's a 60/60/9? Better enough that it's worth nearly 2x the price?
Later on I do plan on building my own twin setup. But both should be ok for that. I care about spool up the most and being cost effective.
What would everyone suggest?

How much air does each charger flow?

Tate

The stage two garrett is a 61.x mm inducer, it runs a a different trim compressor wheel than the stage one, which is the 59mm. If you look in Garrett's turbo listing, there are several 82mm major diameter wheels with different trims. It will also give you the compressor map for each. When you look at the turbo, the 'r' at the end denotes ball bearing CHRA. If it is just numbers, it will be plain bearings.

Best spool up will be from the garrett. Cost effectiveness would obviously go to the Holset. Using the stock downpipe on the garrett will result in high egt's as the adapter is pretty restrictive. I got my garrett from Tom at Turboresource that has a hx40 flange on it so you can use the typical pipes.

That all being said, if you are looking at a bigger turbo and are looking at the garretts, go for the 3788r.

pgdsm

Well I still can't find the info on garretts site but did find this else where. So is it safe to assume I will be able to get more power from the Garrett?

Name: Stage2 (GT3782R with 56 trim comp wheel)
BB? Yes
Turbine Hsg A/R 0.89
Comp Whl mm/trim 82/56
Turb Whl mm/trim 72.5 / 78

and a 56 trim on a 82 works out to be a 61.3 now just have to figure out how big a .89 ar is in cm.

Mike Holmen

Tate, I think that garrett has changed up the specs for the stage 2. I remember having one about three years ago, it was around 62mm. My current GT3782R, is a 59mm inducer. You have one that two to three years old right? Honestly the GT3788R, works decently. You'll have air for at least 500 rwhp. How many mach 4 trucks running a S362/S364 run mid 550's for power. You see the stage 2 GT4094VA duramax garrett turbo, its comes with VG turbine housing. To bad the turbine housing is so goofy, as it would be a wicked turbo.