S366 vs HX52

[cjridert1]

Swapped over the winter, finally getting the 366 on the road. Spool has been ~4-500rpm quicker.
10psi in 3rd, 366 is 4500rpm, HX52 5200.
30psi in 3rd, 366 is 5500rpm, HX52 around 5900

Only work with the change was switching to the Vband to marmon flange
The turbine wheels are significantly different in mass, s366 turbine housing is more appropriately sized and a bit less cumbersome. I don't anticipate. Hopefully get it to the track for some more info

 

[LandSpeed-DSM]

I'm getting 29-30psi almost 1100rpm earlier in 3rd on my HX52.. at part throttle.

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[blizz99]

I'm starting to think I have an exhaust leak somewhere. I'm getting the same spoolup on a T3 s366 in my 2.3L.

 

[RedTsi_PR]

Guys any of you have any video ?? I'm anxious to test any of these 2 turbos but i'm afraid they'll spool later in the 6000 rpm on my stock block motor.

 

[LandSpeed-DSM]

I don't video tuning pulls, not a fan of self-incrimination

If you're not building appreciable boost before 6000rpm and you're not a mile above sea level, something is wrong.. Further in your tune or mechanically, maybe both.

I'm running stock 6 bolt pistons and rods with a big cam and JMF Drag intake on E85.

See the shot of a log where I'm on 30psi before 4800rpm at 65% throttle? This thing's very responsive for a nearly > 90lb/min turbo with a giant heavy turbine.

Both Devin @ Boostin and Sal @ SM compared it to all the 6262s they're putting on customer cars lately.

By the way - a low CR (less thermally efficient) leaves more heat in the exhaust which will bring the turbine up faster.

That's not an opinion, that's physics.

It may be contrary to common "tooners" knowledge, but so are many things.