Supercharged vs Turbocharged FR-S / 86 / BRZ

[cfrp]

Which do you think is more IDEAL for this car in this day and age. What are the pros and cons. I do not think it is impossible to see a force induction version of the Scion FR-S or Toyota 86 or Subaru BRZ in the future.

Out of the two types of forced induction which do you think is more ideal for the boxer motor in this new chassis? The space in the engine bay does not seem to be very big. It seems like a supercharger would fit in their easier. But which is easier to upgrade? A turbocharger or supercharger... As for costs, I would assume a supercharger is cheaper? I believe both of them should give us similar power gains.

[dboz]

IMO, a turbo will ALWAYS give larger gains. Just depends on how much before the guts let loose.

[liljpboi]

Cost wise superchargers are almost always cheaper than turbos and usually require less tuning and parts as well, but as dboz said turbos almost always give more HP

[FR_S_Fan]

Turbo all the way. It's the expensive route but if you want serious gains, turbo is where you go. Also how can anyone not want the beautiful sound you get from a turbo setup

[Driftr]

Subaru=turbo
Toyota=Supercharger
Scion=n/a

[import_nation]

Scion and Toyota would most likely go the Supercharge route where Subaru would go the turbo route. For power output turbo is kind. For response the supercharger can't be beat. Apart from natural of course.

[FR_S_Fan]

Subaru=turbo
Toyota=Supercharger
Scion=n/a

Scion and Toyota would most likely go the Supercharge route where Subaru would go the turbo route. For power output turbo is kind. For response the supercharger can't be beat. Apart from natural of course.

This seems just about right. Would weird if Subaru went with a supercharger but since all 3 cars have the same engine, maybe just MAYBE we will see a supercharger in the Subaru BRZ.

I know the supercharger setup will be what a lot of people go for since it's the best bang for your buck. The FR-S/86/BRZ is a cheap car, and judging the crowd that would be buying it..... i'd say a lot of them would go for a supercharger over turbo.

[liljpboi]

I know the supercharger setup will be what a lot of people go for since it's the best bang for your buck. The FR-S/86/BRZ is a cheap car, and judging the crowd that would be buying it..... i'd say a lot of them would go for a supercharger over turbo.

Not necessarily it depends on if they offer the forced induction variant factory installed or not, let's say Toyota doesn't offer the TRD SC factory installed you would have to pay $3,000 for the part then an additional $2,000 to get the thing installed coming out to $5,000 and if Subaru offers the turbo factory installed in their STi variant the cost will be about the same as the TRD SC because the cost of installation and other various costs don't trickle down to the consumer

[dboz]

The Genesis Coupe aftermarket has been sluggish due to lack of demand. It is tough to buy a new $25k car then dump thousands more in experimenting. Just saying. The aftermarket for the GC has struggled some and has been rather expensive due to less demand. I don't think this car is going to sell in big numbers.

[txmatrix2nr]

If i where designing a system for it, id go with a Rotrex centrifugal supercharger. Has the compressor efficiency of a turbo but the response of a supercharger. Its boost by rpm so intake pressure increases at a linear rate relative to your engine rpm which eliminates any dead spots in your power band and since boost is linear easier to tune.

[import_nation]

The nice thing about the rotrex supercharger is that unless you slam on the pedal mileage doesn't change that much.

[txmatrix2nr]

Exactly, and if you really wanted to get down to it, you could waste gate it and run a street tune and race tune. The boost on the rotrex is limited by two things the pulley and the restrictor on the intake side. The pulley determines how fast you build boost and the restrictor just limits the maximum amount of boost generated by the compressor. Sooo technically you could have it set to boost 15psi all the time but waste gate it to where you actually only use 7psi. Flip a switch on your boost controller for battle mode and your waste gate goes to 15psi. Tune it for both pressures and presto street and race tune.

[import_nation]

^ you have to pay for 2 tunes but having that would be the most ideal world for a boosted application.

[dboz]

I have two tunes on my EVO X. I just use the cruise control to toggle between them. Pretty slick.

There is NO WAY in hell you are going to boost a stock NA engine with 15 PSI even if you gate it for 7 and expect it to take it. You are going to have huge boost spikes doing that, no way to really get around that. Bye bye rods.

[import_nation]

For the FR-S I have a feeling that it'll only take up to 6-8psi. Considering the stock compression ratio.