[wheelhop]

Well, you have dynographs, logs, and videos. Other than actually running any turbo yourself, what other way do you have to make your decision.

The first video posted was of the bolton hx40 2.0L car going 11.08, 13 degrees peak timing, stock exhaust manifold, stock weight.

Hx35:

Here's now a second video. ford 2.3 guys are happy to get 90% VE with major head work and a very aggresive cam. It's safe to say that the 2valve ford 2.3 doesn't have the same advantages as the 4g63, even though it is .3 L larger, from my personal experience with my T-bird TC. Stock SMALL 12cm^2 turbine housing, each volute is the size of 6cm^2 14b volute. Divided runner manifold makes sure that each exhaust pulse only sees a 6cm^2 volute. 585hp @28psi on an engine dyno:

http://www.youtube.com/watch?v=Fv1-omYCb9c

Comparison logs of my holset h1c (same turbine wheel as the hx35, 2mm smaller compressor inducer) vs. my small 16g to show the spool speed.

Add these to the dyno graphs and track results on tuners with the bolton hx35.

HX40:

Compilation video of the dyno session of the 653whp hx40 w/ .55 a/r housing. You also get a great view of how fast it spools on the street. Non-billet 60mm hx40:

http://www.youtube.com/watch?v=PMC2nPrbJvs

Datalogs of the hx40 in the bep housing showing spool speed. Stock Block/Head/Intake mani, BC272, FP Race Mani, FP Intake, 3" DP w/ 3" Cutout, over 50lb/min at 26psi. 20psi by 3900rpms. You can easily see how it can flow 60ish lb/min at 35psi.

Add these to the dyno graphs and track results on tuners with the bolton hx40.

If you don't have dsmlink, here's the above log: