well here's the gig with Fmax and Nsport. If you drive a S14 then Fmax has a pretty good setup. Yes they use a T3/T4 hybrid. It spools up fast but chokes off at higher boost and rev's. T.Y. could tell you about this.
Now some people dis Nsport but they have a good setup too. For different reasons. For one if you own a S13 Nsport has kits for you. In fact they are one of the few who do. the other thing is Nsport will sell you parts seperately if you want to do a custom setup. This is cool. they also use a T04b hybrid which is a larger Turbo than a T3/T4 hybrid.
In there words there is more horsepower potential with the T04b and it won't choke off. Downside if any is a little more lag on the bottom due to larger Turbo . Now with our cars that is not to much of an issue because we have decent low end torque to begin with.
A lot of people don't like Nsport because they use a RRFPR with an FMU.
Fmax use's JWT ECU upgrade. Both companies provide larger injectors on stage II setups. I believe Fmax does on stage I as well.
Both companies use replacement higher flow fuel pumps.
Nsport use's a Turbonetics Deltagate on their stage I kit some people dis this particular wastegate.
Fmax uses a custom welded manifold , which can crack
Nsport uses a RevHard manifold which is cast and less likely to crack. Again some people have had their revHard manifolds crack ,but the same can be said for the welded manifolds.
I know someone who has a Fmax kit and manifold and likes the Revhards better.
YMMV
Ok all said and done I own a S13 and I am going custom . I am blending the best of both companies.
My setup will be as follows
for the time being I will run a T3 limited to 7lbs boost(later upgrade to T04B)
RevHard manifold from Nsport
Intercooler piping and downpipe from Nsport
370cc Injectors (later going to 550cc)
TT Fuel pump
Starion style Intercooler from JGS Turbo's
JWT ECU upgrade
oil lines and pan from Nsport
Blitz blowoff valve
still deciding on my Wastegate.
there it is
this setup because I am sourcing some of the parts myself is probably going to top out around $2000 maybe less we will see.
hope this helps in your planning <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=':D'>