Hey people, i have moved this into here as i got no responce from the tech forum

Righty ho then The senario: 20B, Extended street port, use of car .... no idea yet. Basically i want to build this with a turbo that will let me use the full potential of the engine.... Anyone using the below or any other suggestions would be awsome, any ideas on power/response would be great too

my first thoughts are:
Turbonetics Mid Frame - 76mm compwheel/ 1.14 0r 1.27 A/R turbine
78mm compwheel/ 1.14 or 1.27 A/R turbine

Turbinetics Y2K - 80mm comp wheel but only .96 A/R
Thing that worries me on this one is that its recommended for high boost at 2 bar/30 psi don't really want to run that high?

Or the garrett route

GT4202R 75mm comp with various A/R from 1.01 to 1.28


Any thought sfrom you guys?

 

I run the GT4202R (GT42RS) it has 102mm comp wheel w/ 53 trim (74.7mm inducer) with the TiAL V-band SS housing http://banzai-racing.com/store/Garrett_GT4294R.html

It is a great turbo, spools very nice. We currently have it tuned to 529rwhp @ 12psi, this is just the initial post break in tuning. The entire project and dyno charts can be seen here http://banzai-racing.com/20B_modifications1.htm

Also have a build thread on the forum https://www.rx7club.com/banzai-racing-305/banzai-racing-20b-gt42rs-93-fd-859856/

 

Banzai,

You by chance logging EGT and/or EBP? What do you plan to rev to?

 

I do log and graph the EGT's while tuning, I do not save them though. The engine is happy reving to 8k, may take it to 8500 on the dyno, put it is not like I spend a lot of time in that range on the street.

 

I have a gt42r with a 1.15 hotside 20b extend port in a FD @ 600 rwhp/15psi with meth inj. Turbo suits the 20b torque well.. pulls v strong after 4k rpm and seems not to have any restriction at this boost (ie, wants to keep going). If boost was to come in any earlier, i'ld have too many traction issues.. Pulls consistantly to red-line and spends entire 3rd gear on the verge of losing traction... combined with the 20b's torque, it delivers a fairly linear power curve.

 

If you wouldn't mind sharing some logs, maybe in your build thread if you feel that more appropriate, I'm sure I wouldn't be the only one that'd greatly appreciate it.

 

True story...