300Hp ST205

[sergei]

Hi, what sort of mods required to get 300Hp relaible out of ST205 engine?
I'm looking for upgrade option for my ST165, just thinking if it would be a better option to just drop in ST205 engine in it with minimal mods...

[Malcolm]

300hp is pretty basic for a gen 3 3sgte, more boost, good exhaust and intake, you should be there (or beyond)

[AJz]

300hp is pretty basic for a gen 3 3sgte, more boost, good exhaust and intake, you should be there (or beyond)

yea pretty much exactly what i was gonna say, wouldnt be hard.

[Mr Revhead]

yeah. al is making around 250 from his dinosaur with nothing but a "ct20b" downpipe and some profec boost controller thingy.

300hp + st165 = cool

[GT4 20]

Asuming you're talking about @ flywheel figures, then working on the fact that you loose arpprox 25% for 4WD transmission, my ST205 was recently dynoed @ 308bhp.



Mods?
2.5" exhaust inc downpipe and decatted. TRD panel filter still in OE air box and a Profec EBC running 16.2psi. Everything else is standard inc the steel shaft CT20b (for the time being at least )

So in answer to your question, very few.
Gary

[Malcolm]

300hp is pretty basic for a gen 3 3sgte, more boost, good exhaust and intake, you should be there (or beyond)

Asuming you're talking about @ flywheel figures, then working on the fact that you loose arpprox 25% for 4WD transmission, my ST205 was recently dynoed @ 308bhp

...

Mods?
2.5" exhaust inc downpipe and decatted. TRD panel filter still in OE air box and a Profec EBC running 16.2psi. Everything else is standard inc the steel shaft CT20b (for the time being at least )

who da man?
(that's me on the chair)

[Mr Revhead]

some ons ego is a little rampant these days

[Malcolm]

haha...well, I'm no legend yet

[Mr Revhead]

hehe yet, nows the time to start whoring ya self for next years awards!

[sergei]

cool, so Be it... now I will save money on not modifying old ST165 engine, for the new ST205 powerplant ....

[fivebob]

Asuming you're talking about @ flywheel figures, then working on the fact that you loose arpprox 25% for 4WD transmission, my ST205 was recently dynoed @ 308bhp.

Not wanting to start the old debate up, but IMHO 25% is way too much drivetrain loss, I'd be very surprised if it's any more than 15%+10hp which would make your power approx 300hp.

Anyway it's obvious from your figures that you used a 20% loss figure, or more likely a multiplied by 1.25, which according to my maths are the same

FYI to get an estimated FWHP given a fixed % loss the formula is WHP/(1-(loss%/100)) or in the case of 25% loss WHP/0.75.

Anyway that's all just a BS guestimate, unless you use an engine dyno, and it has no relevance in the real world, HP at the wheels is what counts. Good for ego inflation though ,eh?

[RomanV]

Hehe, yes I remember discussing this in that other thread, I now find it quite amusing when people say 30% drivetrain loss, etc. etc.

(read here if you are interested in what I am talking about http://www.pumaracing.co.uk/setup01.htm)

[GT4 20]

Fully agree that @ wheels figures are far more important. Hence why I tend to quote any power I make @ wheels Guess this 'discussion' could easily go round in circles as the only way you can get accurate @ flywheel (as you say) is on an engine dyno.

Anyway it's obvious from your figures that you used a 20% loss figure, or more likely a multiplied by 1.25, which according to my maths are the same

Err, where do you get 20% from?

184.3kW = 247bhp

247 x 1.25 (or + 25%) = 308.

247 x 1.2 (or +20 %) + = 296.

So looks like they aren't the same - according to your maths

Gary

[Lloyd]

308 x 0.80 (or minus 20%) = 246.4


Take a number, add 25% on, take 25% off and they'll be different

Take a number, add on 25%, take off 20% and they'll be the same

[fivebob]

Fully agree that @ wheels figures are far more important. Hence why I tend to quote any power I make @ wheels Guess this 'discussion' could easily go round in circles as the only way you can get accurate @ flywheel (as you say) is on an engine dyno.

Anyway it's obvious from your figures that you used a 20% loss figure, or more likely a multiplied by 1.25, which according to my maths are the same

Err, where do you get 20% from?

184.3kW = 247bhp

247 x 1.25 (or + 25%) = 308.

247 x 1.2 (or +20 %) + = 296.

So looks like they aren't the same - according to your maths

Err do you need a reading comprenshion course as well as maths instruction, I said 25% loss You know, as in lost from the crankshaft, so you need to do a bit of basic maths to solve that problem.

A 1/4 loss for a figure is a 1/3 gain, from the result . So to use your 25% loss figure, you need to multiply by 1.33 therefore;

247*1.33 = 328.5

I'll leave you to do the 328.5*.75 part of the calculation and prove that I am correct.

This maths lesson bought to you by the letters B & S and the word Horsepower

[Mr Revhead]

Anyway that's all just a BS guestimate, unless you use an engine dyno, and it has no relevance in the real world, HP at the wheels is what counts. Good for ego inflation though ,eh?

not in my case! ran the ae101 on a chassis dyno in the weekend....
a whopping 51kw at the wheels
seeing as theres nothing actually wrong with my car im gunna say its a rather low reading dyno!

[Malcolm]

Anyway that's all just a BS guestimate, unless you use an engine dyno, and it has no relevance in the real world, HP at the wheels is what counts. Good for ego inflation though ,eh?

not in my case! ran the ae101 on a chassis dyno in the weekend....
a whopping 51kw at the wheels
seeing as theres nothing actually wrong with my car im gunna say its a rather low reading dyno!

Nonono, you've got it all wrong, that's 51kW per wheel, so 102kW total which equates to approximately 250bhp

[RomanV]

Anyway that's all just a BS guestimate, unless you use an engine dyno, and it has no relevance in the real world, HP at the wheels is what counts. Good for ego inflation though ,eh?

not in my case! ran the ae101 on a chassis dyno in the weekend....
a whopping 51kw at the wheels
seeing as theres nothing actually wrong with my car im gunna say its a rather low reading dyno!

Oh man, that sucks.

Was that with/without sard ECU?

[Adamal]

Man, that can't be right. They must have stuffed up when they entered your final drive ratio or something. That or their dyno is in need of some serious maintainence!

I'm no 20V fan, but I know they can do better than that!

[Mr Revhead]

hah yeah. i think what the problem is, is its set up as an engine dyno, and a chassis dyno. and the calculations for the rollers are off.
but for tuning that wont matter, for bragging... well it sucks!
the sard ecu...... it kicks ass!!!!
ill put a post up and plots in my sard ecu thread later on tonoight