SOLD.. For Sale.

[Turf Man]

Not quite sure where you found that formula for the gear ratios but is there another one for cars that can't go above 7k?

20 years or so ago, I read about that formula in some magazine, Road & Track or Car & Driver, I don't remember...

Le journaliste/essayeur utilisait cette formule pour déterminer à quel rpm nous commençons à perdre du temps en continuant d'accélérer tout en demeurant sur le même rapport. Par le fait même, cette formule nous indiquerait à quel RPM il vaut mieux upshifter lors d'une accélération.

Est-ce valable? Je présume que oui, mais je ne suis pas ingénieur.

Si on l'applique à ta voiture stock selon le dyno (D) de Lachute (voir setup «A» précédemment) on obtient ceci:

D: Torque: 275lbs @ 3620

Le calcul F: indique le upshift idéal selon les données du fabricant de 290lbs @ 4000rpm.

1st Gear Ratio 3.64:1 shift to 2nd @ D:5882rpm/F: 6500
2nd Gear Ratio 2.24:1 shift to 3rd @ D:5334rpm/F: 5894
3rd Gear Ratio 1.52:1 shift to 4th @ D:4826rpm/F: 5333
4th Gear Ratio 1.14:1 shift to 5th @ D:4254rpm/F: 4701
5th Gear Ratio 0.97:1 shift to 6th @ D:4620rpm/F: 5105
6th Gear Ratio 0.76:1

Si la formule est bien exacte, ça remet en question le culte du redline avec une sti 2008-2009 stock pour l'accélération. Sauf pour pour passer de 1 à 2 ou pour atteindre la vitesse maximale, il serait inutile de «winder» au-delà de 6000-6200 rpm.

Mais ce n'est plus ton cas!

If the formula is right, it tells us that you can rev your engine to the redline to pass 2nd and 3rd gear and almost redline to 4th.

At every upshift, when you release the clutch, your engine will have at least 100HP more than the stock engine to accelerate the car to the next upshift.

Am I wrong to think that your car is willing to cross that 6700rpm redline quite easily up to 5th gear?
This is not a car to put in everybody's hands. Your brother in law might just explode your engine running it 7X00 rpm accidently.

If I'm right, the next upgrade would be a rev warning light on top of the bezel (beziel?), something directly under you line of sight that would warn you (with a real buzzer sound) that you just passed over 6500rpm.

[il09sti]

not sure I'm following you. You are absolutely right, the car pulls hard all the way to 7k but my engine is forged and sleeved. There for, Much stronger than the stoker. Which leads me to believe it can handle the extra RPMs thrown at it. There is also a rev limiter that cuts the engine at about 7k I believe or just below. So the brother in law can have a spin and have fun without worrying about him blowing it up. Right? Your making me panic bro. I bring it up there almost all the time when driving hard. I have even hit the limiter a few times.

[THA Roux]

Take it EZ!

This would just be a good safety feature. You might have a bullet proof engine, but IMHO you better be extra careful right away than to regret it later!
see it as another investment to keep the beast alive for as long as possible!

Your brother in law will still be able to have an insane spin, but he'll probably be "gentle" with that kind of christmas lights flashing in his face

[il09sti]

I actually wanted to install one to help me with the shifting. I hate having to glance down at the cluster when racing.

Side note. Brother in law is just an example. I would NEVER let anyone drive my car.

[THA Roux]

I would NEVER let anyone drive my car.

I totally agree with that!

can I?

[shawnash]

Beautiful car man, I'm sure you'll take great care of it.

[Turf Man]

not sure I'm following you.

On the previous page, you told me that «As for the 6700RPM, Yes I still consider the red-line to be there. That's until I get the cosworth heads then things may change. Even then I'm not sure. Ill ask Julien next time I speak to him which is going to be on Monday»

So I assumed that «forged and sleeved» primary role is to handle the 100+ new HPs and you needed a new head to rev this pass stock redline.

I also thought that rev limiter has been removed in the tuning process.

As for «I bring it up there [redline] almost all the time when driving hard» the formula shows that you have the power band to do it wich is absolutely not the case with a stock engine.

Now, you're the guy experimenting all these upgrades and generous enough to share his experience with us so don't worry with any comments or questions I bring to you. I still have to drive 15000km (under warranty) before I pay a visit to Lachute's guy and follow your path.

[JFSTI]

I still have to drive 15000km (under warranty) before I pay a visit to Lachute's guy and follow your path.

Je suis ben d'accord avec toi!
J'ai un STi08 pis j'ai eu des troubles avec le moteur, j'avais des hésitations en accélération. Suite à de plus grandes hésitations (c'était rendu ridicule, un peu plus pis j'avais un torticoli!) le dealer a changé moteur/turbo pour du neuf vers 35k. Tu imagines si j'avais eu un ECUtek/Turbo back...oublie le changement de moteur.

Mais je suis en complète admiration pour le setup de il09sti, moi aussi je regarde ce thread fréquemment, vraiment un setup de rêve!

En passant je trouve la mod ECUtek/Pipe/Headers/UpPipe@361hp vraiment attirante. Est-ce que c'est un "equaly lenth header"? Si oui c'est pas mon choix, je suis trop malade du rumble de boxer engine.

Keep up good work il09sti!
JF

[Hugowagen]

En passant je trouve la mod ECUtek/Pipe/Headers/UpPipe@361hp vraiment attirante. Est-ce que c'est un "equaly lenth header"? Si oui c'est pas mon choix, je suis trop malade du rumble de boxer engine.

Non

[JFSTI]

Tu veux dire non c'est pas un "equaly lenth header" donc vive le beau rumble?
JF

[Blackcot Racing Team]

pense que oui moi
le headers lachute change le son....

[pilman]

ca change le son oui effectivement

http://www.youtube.com/watch?v=QhoZR-byo5s

[Hugowagen]

Je voulais dire non tu n'auras plus le rumble typique du Subaru. C'était pas très clair comme réponse désolé

[il09sti]

WOW! My thread has allot of interest all of sudden!

I would NEVER let anyone drive my car.

I totally agree with that!

can I?

Great so we both agree!

Beautiful car man, I'm sure you'll take great care of it.

You can bet on that! Thank you!

not sure I'm following you.

On the previous page, you told me that «As for the 6700RPM, Yes I still consider the red-line to be there. That's until I get the cosworth heads then things may change. Even then I'm not sure. Ill ask Julien next time I speak to him which is going to be on Monday»

So I assumed that «forged and sleeved» primary role is to handle the 100+ new HPs and you needed a new head to rev this pass stock redline.

I also thought that rev limiter has been removed in the tuning process.

As for «I bring it up there [redline] almost all the time when driving hard» the formula shows that you have the power band to do it wich is absolutely not the case with a stock engine.

Now, you're the guy experimenting all these upgrades and generous enough to share his experience with us so don't worry with any comments or questions I bring to you. I still have to drive 15000km (under warranty) before I pay a visit to Lachute's guy and follow your path.

ooooooooooooooooops I totally misunderstood your post Sorry bro, I thought you where trying to tell me to keep it below 7k or id blow it.
One of the reasons I built the engine was because I didn't want to ever have to deal with a blown engine. Under warranty or not.

Thanks for helping me make my thread interesting!

I still have to drive 15000km (under warranty) before I pay a visit to Lachute's guy and follow your path.

Je suis ben d'accord avec toi!
J'ai un STi08 pis j'ai eu des troubles avec le moteur, j'avais des hésitations en accélération. Suite à de plus grandes hésitations (c'était rendu ridicule, un peu plus pis j'avais un torticoli!) le dealer a changé moteur/turbo pour du neuf vers 35k. Tu imagines si j'avais eu un ECUtek/Turbo back...oublie le changement de moteur.

Mais je suis en complète admiration pour le setup de il09sti, moi aussi je regarde ce thread fréquemment, vraiment un setup de rêve!

En passant je trouve la mod ECUtek/Pipe/Headers/UpPipe@361hp vraiment attirante. Est-ce que c'est un "equaly lenth header"? Si oui c'est pas mon choix, je suis trop malade du rumble de boxer engine.

Keep up good work il09sti!
JF

You will not be disappointed with that setup. Believe me! you are going to LOVE IT! AND THE SOUND! The sound is definitely not the same but It's badass just the same. It more of a faster rumble and I find it suites the car much more than that lazy rumble it had prior to the EL headers(sorry if I offended anyone there)
Cheers!

ca change le son oui effectivement

http://www.youtube.com/watch?v=QhoZR-byo5s" onclick="window.open(this.href);return false;

Julien I have a questions for you. If I install the cosworth heads will that allow me to go past the 6700RPM mark? or would I need more supporting mods?


.

[il09sti]

I got my first ticket tonight. 140km in a 100 zone. 244$ and 3 points! The thing is, he didn't get me on radar or anything. He said he was following me. I did speed up to pass someone in the left lane but even I couldn't say how fast I went. How is it possible to make an estimate like that? Anyway, I don't know weather I should contest it or not...