Old fashioned N/A power making... Anyone?

[s0sl0w]

Is anyone doing some of the more "old fashoined" power making for the FA20 or has everyone just jumped on the F/I train. I'm talking about port/polish/port matching, cams, etc.

I'm intensely interested in a lightened up (rotational mass) with a thoroughly groomed powertrain BRZ.

If people are pushing near 200 WHP with bolt-ons + tune I think some good head work could really make the car a stunner and even if you do go F/I afterwards it's just going to make that much more power.

[Andy@FA20Club]

Cams are the hold up currently -- not available on the market.

[DoctorNick]

Have people approached cam makers for N/A parts? Or is the focus on feeding the FI fire right now? Are we just waiting for SEMA/PRI of this year or are they not even that far along in development?

Ignorant to how knocky these motors can be with the stock compression, I would love to see some forged high compression pistons, lumpier camps and ITBs... a boy can dream, right?

[jamesm]

The closest thing to an NA build worth doing is the innovate kit. As always with these small engines (that aren't Hondas) the hp/$ math just doesn't work for NA. You can make so much more power for so much less money than with FI that is just doesn't really make any sense.

Purists will disagree, but until itbs and cams and all that are available it's not an option, and even when they are it won't be a good one.

[Andy@FA20Club]

The Cams are complicated to say the least but beleive will see something as HKS is the only one now with the unicorn.

[s0sl0w]

Originally Posted by jamesm

The closest thing to an NA build worth doing is the innovate kit. As always with these small engines (that aren't Hondas) the hp/$ math just doesn't work for NA. You can make so much more power for so much less money than with FI that is just doesn't really make any sense.

Purists will disagree, but until itbs and cams and all that are available it's not an option, and even when they are it won't be a good one.

Taking care of the fundamentals will only make a f/i'd motor that much better. F/I isn't a replacement for a proper internal work.

[jamesm]

Originally Posted by s0sl0w

Taking care of the fundamentals will only make a f/i'd motor that much better. F/I isn't a replacement for a proper internal work.

building an engine for na power and building an engine for boost have very little in common, and use very different parts. what works for fi is pretty much the exact opposite of what works for making power na.

if your goal is to make more power, then making it with fi definitely is a replacement for (or alternative to) engine work. of course a built motor and boost is even better, but building your engine for na power today isn't going to help you make power with your fi setup later down the road. you'd end up building the engine twice.

[StormTrooper]

There are a few things that benefit both like forged internals and polishing balancing. But yes heads or cams should be designed for either setup not both.


150 lbs of weight loss and +40whp will really change the way this car moves.

Full light weight exhaust, battery, spare tire , seats, brakes, tune.

Not cheap though

[DoctorNick]

I'd love to lighten up the rotating mass and do whatever it takes to increase throttle response. A little bump in N/A power would be nice too.

[RehabJeff86]

I would die for a NA FA20 motor fully built to 220+ rwhp with 200+ ft/lb torque and rev to 11-12k rpm

[Smokinbuffalo]

Whatever tunes the torque dip out, give me that.

[s0sl0w]

Originally Posted by StormTrooper

There are a few things that benefit both like forged internals and polishing balancing. But yes heads or cams should be designed for either setup not both.


150 lbs of weight loss and +40whp will really change the way this car moves.

Full light weight exhaust, battery, spare tire , seats, brakes, tune.

Not cheap though

Cams and changing the compression ratio yes but head flow is head flow, flow is good.

[Calum]

Originally Posted by s0sl0w

Cams and changing the compression ratio yes but head flow is head flow, flow is good.

Recent work with DI seems to conflict with that. I don't understand it so I'm not even going to attempt to paraphrase it, but from what I've read if you just look for all out flow your gonna have an engine that runs very poorly.

[Turdinator]

Originally Posted by Calum

Recent work with DI seems to conflict with that. I don't understand it so I'm not even going to attempt to paraphrase it, but from what I've read if you just look for all out flow your gonna have an engine that runs very poorly.

My understanding is that there need to be a tumble effect in the cylinder for the fuel to mix correctly. I haven't seen anything about whether this is more of an emissions or economy thing or whether the engine really needs it to run well. But 4 valve per cylinder engines have been utilising air tumble for years. The 2 valve engines use swirl to the same effect. So I am sure the guys that port and polish heads can make it work for us also.