dsm-onster
DSM Wiseman
- 8,592
- 124
- Jul 11, 2004
-
Bloxom,
Virginia
Hmm intresting, Now do you think with a T4 non-divided manifold with the T4 divided 19cm housing will spool at least by 5k? That wouldnt be too bad for me.
Im worryed about spool by its not my main concern, the car will be mostly track car and not really street driven. The most boost it will see right now is 32psi.
If worst comes to worst im going to sell my t4 mani and get a turbonetics t3 replica and a BEP T3. housing. OR maybe keep my t4 maniold get a t4 to t3 adapter flange then run the BEp t3 70 ar housing.
I would definately go for the t3 bep housing. Laggier than the small bep housing, but spools under 4500rpms with the hx40. I have no experience on what the undivided manifold w/ a twinscroll turbo will do. But I do know having a setup like that the exhaust gases will see a turbine housing that will be atleast twice the size of a .63 a/r housing, 1.26 a/r. . . That's huge. The pulses when divided will each see an individual volute that is probably no bigger than a .84 a/r housing.
Left t3 .63 a/r, right holset 19cm^2 a/r^2. Looking down the volutes, each 19cm^2 scroll looks to have a similar area to the .63 a/r t3 scroll: