Hello, I'm in process of go from NA to Twin turbo setup.

The engine specs are the following now, 565 Ci, with brodix BB3 XTRA Heads, compression will be 8.3:1, my goals are 1000 to 1100hp at crank at something near 7-10 psi of boost
I'm looking at twin 72mm turbos (what you think about this?)

I want this ones: Turbonetics TNX C15 12008-BB ( https://turboneticsinc.com/store/index.php?route=product/product&path=35_42&product_id=763 )

Should i keep with those turbos or go smaller or bigger?

 

I will say that hitting 1000 with that combo should be a no-brainer. I have a 468 BBC that makes 600 n/a and I have 2 S366 turbos that are advertised to support 800hp each. 1100-1200 on low boost will not be an issue. The turbo you want is slightly larger than mine so again, no issue. Your motor probably makes over 600 n/a too

 

You're going to want more turbine than the F1-68 imo. Call Jose at forced inductions, he'll get you exactly what you need.

 

Actually it's 10:1 compression making like 730hp

I Will look for him, thanks for info

 

what you think about BorgWarner S300SX-E S372 72mm , w/ T4 undivided .88 A/R

Specifications:

• Compressor Wheel Exducer: 91.00mm
• Compressor Wheel Inducer: 72.00mm
• Turbine Wheel Inducer: 79.76mm
• Turbine Wheel Exducer: 73.37mm

Theres an open .96 A/R option and 1.06 A/R

 

Are those a Jose reccomendation? That's much better, but depending on your usage and goals you could probably go bigger yet. A pair of S472 or 475s with the 83, or 87mm turbines may be a good fit if you have room and your goals are more strip than street. Also give you room to grow.

You won't be disappointed in a call to Jose if you haven't already. He sells a lot of the BW turbos at a great price, and won't steer you wrong.

 

I sent mail to forcedinductions but i didn't get an answer yet, I'm from south america, so it's difficult to call from here

I Really don't want to goo too big, and my goals aren't too crazy, near 1100hp on a 565Ci Engne with low boost.

I actually own a 383 SBC with a single 88mm Turbo doing like 700hp or so @ 10 psi of boost, and that turbo seems to big to install two on the BBC, that's why i want T4 Twin turbos instead of a Big Single

Actually the engine application is sand offroading hill climbing.