Boost, it's still notice that dip. Unless you get small turbo that can spin from 2k

:P longer duration, maybe higher lift. You get it.

To clarify --- correct the drop of over 7% of peak torque AND add boost, and the car will be legendary.

Frankly, my hope is for a roots blower (unlikely...).

Like a TD-04? Personally, a mid-frame twinscroll turbo is what I'd prefer. Better transient response than a large singlescroll turbo and better top end than a small singlescroll turbo.

Ahem...

looks like fun. very broad torque band (minus the dip). i'm happy to see dynojet numbers finally...

Agreed. Toyobaru keeps saying they "left room for improvement for aftermarket", hopefully this means they left room in tuning, intake, etc. Hears to hoping we will see some big gains once we find out which areas they left for us to improve.


Justin

will that torque dip help with better Highway milage? 2-3k rpm is about cruising speed @70 on any car.

also looks like the key is to stay at the 5000-7000rpm range if your doing race events.

Looks like 200whp will be easily achievable. (intake, header, exhaust and tune)

I'm with you on that. It's got to be mostly related to intake geometry - perhaps that's was the best fit for low end and high end power all while making it cost effective in the manufacturing process? Who knows... I'm doubtful that it could be completely resolved with just fuel/timing map modifications (although I'm sure it could be smoothed out a bit). Either way, it will be interesting to see what happens in the future when more aftermarket companies get some time with it.

Here's a combined plot for the BRZ .jp website curve, COBB BRZ dyno, and Insideline FRS dyno. Even if we assume only 12% drivetrain loss (low for RWD), the engine is still underrated below ~6600-7000 RPM:

https://lh5.googleusercontent.com/-W...rcent+loss.png

Links:
http://blogs.insideline.com/straight...cion-fr-s.html
http://www.ft86club.com/forums/showp...1&postcount=77

Well numbers and curves seem to be very comparable, that's a good thing.

When people look at cars these days they look at the price $$$ and then the HP ### and that's their math.

A BRZ/FRS is $25,000? okay! what else is about 25K??? Hey look Car X has 300 HP and is the same price or cheaper! This car is crap! :hitcomputer:

Dip is a function of cam and tuning for max power at 7000. Tune for 7000 rpm peak and apparently you get anti-tuning at ~half that. I have (had) the same dip on my tweaked 240z 3.1. Doesn't matter what you do with the fuel maps and ignition timing if the engine simiply isn't breathing well at that rpm.

Forced induction should minimize the dip. You're no longer relying as much on low pressure in the cylinder to draw charge in better as the intake opens.