8 replies to this topic

[Spinksta]

Afternoon,

Theoretical question: how much power / torque would it be possible to get out of a forced induction 998 with any amount of tuning, without it being too unreliable (e.g. without having to rebuild it every year)? Assuming the gearbox, etc, has been upgraded to cope sufficiently, and without increasing CCs or adding laughing gas..

I'd like to say around 140 horsies, but that might be a tad optimistic? It's not exactly an educated guess.

Anyone got a better estimate?

[*DJH*]

Afternoon,

Theoretical question: how much power / torque would it be possible to get out of a forced induction 998 with any amount of tuning, without it being too unreliable (e.g. without having to rebuild it every year)? Assuming the gearbox, etc, has been upgraded to cope sufficiently, and without increasing CCs or adding laughing gas..

I'd like to say around 140 horsies, but that might be a tad optimistic? It's not exactly an educated guess.

Anyone got a better estimate?

140 bhp is really pushing it in my opinion, mini7s are 95 bhp at the wheels, without turbo, supercharger or nitrous.

And i'm pretty sure a lot of people will tell you that forced induction doesn't work well.

[Big_Adam]

You ain't getting 140bhp and still having a drivable car. Also the fact you want to stick 998. The amount of head work and turbo lag would be massive.

Got a guy on here who is attmpting 100bhp no forced induction. I've heard of 75bhp (just drivable style motor) over that it's race engine territory for the 998 so you loose all drivabuility from a road car view.

100bhp is more resnoble but still alot.

[rozzer!]

jet blick has 63.5 or something from a v tuned 998.
i am going for 70 bhp, and personally i think this is the limit for a street drivable and reliable engine.

[*DJH*]

You ain't getting 140bhp and still having a drivable car. Also the fact you want to stick 998. The amount of head work and turbo lag would be massive.

Got a guy on here who is attmpting 100bhp no forced induction. I've heard of 75bhp (just drivable style motor) over that it's race engine territory for the 998 so you loose all drivabuility from a road car view.

100bhp is more resnoble but still alot.

Thanks for pointing out the 'road car' driveability aspect adam

[Big_Adam]

I gotten in the habit from the berk in my class.

They don't know the 1st thing about tuning. They think beacuse they pissed about with the ecu that they can past the red line without killing the car.

[stefaz]

with forced induction its possible to get over 120 but it involves specially engineered pistons, a 1275 turbo head and many many other mods. it has been done. but it wont be reliable or driveable on the road. n/a engines are alot more reliable if you are wanting to stay a series and you can get pretty big power out of a 1380. if not, a yamaha r1 engine is 998cc lol

[stef]

put a bigger engine in

cheaper too

[Ethel]

If it's theoretical practicality, the same as something that started at 1275cc's

only the block, crank, rods and pistons would need to be different.

Dunno if you could get mains bearings up to metro turbo size with a billet crank, suspect that'd be the first stumbling block, that or an empty wallet!

But isn't theoretical practicality an oxymoron?