Post by
SpecDRacing »
https://forums.nicoclub.com/specdracing-u28175.html
Mon Dec 25, 2006 2:31 pm
Yeap, the few VQ powered 240sx that are running around have standalone systems, which....greatly reduces complexity when it comes time to drive, but requires dyno time. With this setup, you just put it in and drive away. No dyno time, no chance to blow you engine by a keystroke and more power out of the box. Though a very good tune with a very good cam will yeild the factory HP ratings or more, a basic standalone tune will result is less power. I know because I've seen it done. I also know that with the stock 2003 ECM, a piggy back (like the E-Manage Ultimate), a performance upper intake manifold and full exhaust, can yeild approx. 370 RWHP. Not bad seeings how the stock ECM was only good for 285 crank HP. Yes, most of the tunning in the stock ECM is for emissions purposes rather than power (retarded intake cams durring deceleration) and mild advance at normal throttle range....durring aggressive driving, the cams light up with over 40 degrees of advance, fuel flow is correct for max power and even the throttle is controlled precisely across the RPM range to achieve optimum airflow velocity to atomize the fuel in the intake charge. Basically as close as you can come to the ol' sayin
" A lady on the street but a freak in the bed!"
I really hope the standalone companies can come up with a way to match this, but for now, its not happening....but oh when they do!
Also, any decent standalone will cost from $850-$2000. Stock ECM, stock BCM, wiring, one key and a NATS antenna amp will cost around $400. If the power doesnt make sense, the money will. Even new from the factory, the Key is $75, the NATS Amp is like $100....now the ECM and BCM.....if you cant get them used, you better go standalone cause your looking at $3000.00 + for the two of them.
Standalones are great....they are equivelant to a 4 barrel carb to the older crowd. Sad thing is...now standalones are for the older crowd....atleast untill they catch up to the manufacturers, which I assume will only be a matter of time. 'By the way......FWD VQ's are only 10.0:1 compression (except for the Altima SE-R which is the same as the Z). Therefore a new set of pistons will be needed to get the 10.3:1 in the 03-06 Z and the 10.6:1 compression in the 07 Z. FWD VQ's require new oil pans, upper and lower intake manifolds, drivers side valve cover (or trim that VC and the manifold for the oil cap to fit), exhaust manifolds, intake piping, etc. To do it with a FWD is alot of work....trust me...I did all that to this engine.....down to the pistons, but for anyone wanting to do this at home.....just get a set from a G or a 350Z.....oh, and should you want the HR motor, its only in the G sedan for 07, not the coupe....and of course its in the Z.
Great input guys, glad to see suggestions and recommendations. As far as bang for the buck.....stock components from a rear end totaled Z is the way to go.
Did I mention the Z has a very nice R200V diff???
Later