Lostnwalmart
New member
- Joined
- Jul 19, 2006
- Messages
- 8,970
Well I have both of these sitting on the shelf and was wondering how they compare in the real world. On paper they are almost identical. Is one more reliable, one spool faster, one sound better LOL? The s475 has a t4 1.10 82 mm turbine the gt42 is a 1.01 housing. It will be a single for a bit then a secondary for my 106. If no one knows I'll just strap them both on and pick the one I like best. I'm thinking a .9 housing on the s475 wod be win but don't know for sure. The header is gated so I'm not concerned with drive pressure. Also s475 is brand new, gt42 has about 2000 miles on a rebuild.
![731376-2comp.jpg](http://www.turbobygarrett.com/turbobygarrett/sites/default/files/default_images/turbogroup/performance_maps/731376-2comp.jpg)
![177248.jpg](http://i1118.photobucket.com/albums/k609/BBDPerformanceinc/177248.jpg)
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