Sti 2004 2.5!!!!!!
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Originally posted by samurai
Personally, I like Subaru's idea of using a 2.5 instead of a 2.0. For anybody who has driven a WRX 2.0l turbo, how is the turbo-lag?
Personally, I like Subaru's idea of using a 2.5 instead of a 2.0. For anybody who has driven a WRX 2.0l turbo, how is the turbo-lag?
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Originally posted by samurai
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Supras in the JGTC (Japan Grand Touring Championship) use 4 cyl- engines intead of 6s and they still won this years championship against 6cyl Skylines, and 6cyl NSXs (though the NSXs are their rivals of late).
Tim
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Supras in the JGTC (Japan Grand Touring Championship) use 4 cyl- engines intead of 6s and they still won this years championship against 6cyl Skylines, and 6cyl NSXs (though the NSXs are their rivals of late).
Tim
-CLD_FSN
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Yeah it takes awhile to become aware of the turbo, how to prepare it and build boost for takeoff, how to maintain boost, and how to avoid it for fuel consumption. There's other things, like clutching while the turbo is under boost will cause the engine to rev a bit before the BOV kicks in. I've accidentally used this to fake a "blip" while double-clutching, but from what I can tell it's undesirable and avoidable if you're not a noob. 
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Joined: Dec 2002
Posts: 134
From: columbia,md
Car Info: 03 wrx,944 turbo racecar, Lexus is300
Calculate this.....low compression 2.5 makes 155 hp ( 8.5:1)
variable valve timing is worth 15 hp, and the STI intercooler should be capable of making the industry standard of at least 10hp per psi (130 hp) THERE IS YOUR 300 HP.
So the STI will most likely run 13 psi......think back to the 2.5 rs in sport compact, in the end they ran like 14 lbs of boost to make around 300 hp from a 2.5 turbo. The STI internals are much stronger than the sport compact car so 18 psi would maybe ( depending on which turbo we get ) equal 350 hp, add a uppipe and turbo back ,.and it should push close to 400.
My 944 turbo is a 2.5 liter 4 and with 19 lbs of boost and biggg turbo, it makes 395 at the wheels.
Keep in mind the shape of the combustion chambers have been reworked for forced induction so the STI IS very UNDERTUNED !!
The potential is incredible, good luck on the electronics though, you know Subaru Technica International is'nt gonna let anyone other than Prodrive-USA have a crack at the ECU.
944 turbo guy
variable valve timing is worth 15 hp, and the STI intercooler should be capable of making the industry standard of at least 10hp per psi (130 hp) THERE IS YOUR 300 HP.
So the STI will most likely run 13 psi......think back to the 2.5 rs in sport compact, in the end they ran like 14 lbs of boost to make around 300 hp from a 2.5 turbo. The STI internals are much stronger than the sport compact car so 18 psi would maybe ( depending on which turbo we get ) equal 350 hp, add a uppipe and turbo back ,.and it should push close to 400.
My 944 turbo is a 2.5 liter 4 and with 19 lbs of boost and biggg turbo, it makes 395 at the wheels.
Keep in mind the shape of the combustion chambers have been reworked for forced induction so the STI IS very UNDERTUNED !!
The potential is incredible, good luck on the electronics though, you know Subaru Technica International is'nt gonna let anyone other than Prodrive-USA have a crack at the ECU.
944 turbo guy
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2.0 rules
Subaru can still use the "normal" WRX as it's production car for WRC rules.
And Subaru should be thanked by every car company. True car fun has returned to the States.
Now Ford should bring over their Aussy line up and GMC their Holden line up. I miss front engine/rear drive sedans.
And Subaru should be thanked by every car company. True car fun has returned to the States.
Now Ford should bring over their Aussy line up and GMC their Holden line up. I miss front engine/rear drive sedans.
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Re: 2.0 rules
Originally posted by plexiwrx
Now Ford should bring over their Aussy line up and GMC their Holden line up. I miss front engine/rear drive sedans.
Now Ford should bring over their Aussy line up and GMC their Holden line up. I miss front engine/rear drive sedans.
Last edited by Drover; Jan 19, 2003 at 01:46 AM.
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From: She's so hot, I'd tongue-punch her in the fartbox
Car Info: 2001 RSTi Widebody
So the US market gets their own engine...that means that we will once again be all alone in search for aftermarket motor upgrades from Japanese tuners...right?
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Joined: Nov 2002
Posts: 116
From: Redmond WA
I doubt we'll be alone in the case of parts, since all the external parts should be the same. cause for 2.5RS, the only thing that's not compatible with jdm stuff is the front cross member. correct me if I am wrong.
my other question is, why would subaru suddenly do this? develop the best engine for NA only? I think that's a first for any foreign auto makers. wiered.
my other question is, why would subaru suddenly do this? develop the best engine for NA only? I think that's a first for any foreign auto makers. wiered.
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Originally posted by samurai
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Sorry for the double, but since I just saw the above, I had to comment. Supras in the JGTC (Japan Grand Touring Championship) use 4 cyl- engines intead of 6s and they still won this years championship against 6cyl Skylines, and 6cyl NSXs (though the NSXs are their rivals of late). They do use a weight "penalty" system which gives a greater advantage to cars that utilize HP:weight ratio better and the Supra has a 4cyl engine that is shoved back towards the driver.
Tim
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Sorry for the double, but since I just saw the above, I had to comment. Supras in the JGTC (Japan Grand Touring Championship) use 4 cyl- engines intead of 6s and they still won this years championship against 6cyl Skylines, and 6cyl NSXs (though the NSXs are their rivals of late). They do use a weight "penalty" system which gives a greater advantage to cars that utilize HP:weight ratio better and the Supra has a 4cyl engine that is shoved back towards the driver.
Tim
kicks major @ss but maintnence is freaky! they have to take it apart prolly everyday..
but it's shows dominance on the track..
i believed they used to use the 2JZ but rule changed regarding ppl using them as FMR layout and gaining advantages and JG amended the rules.
so they had to switch to the smaller and lighter 3S-GTE to keep the FM layout.
2jz was dominating .....
this is very different from BMW cheating w/ the AMLS rules!!
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From: Union City/San Diego, CA USA
Car Info: The Thundercougarfalconbird
When the engine is "tucked barely into the cabin" that is pretty damn close to the CG of the car compared to other cars. The midship usually refers to the engine that is mounted just BEHIND the cabin, but in this case, Toyota shoved the engine so far towards the cabin from the front that it might qualify as a midship mounted engine. I'm sure though that the main reason why the strategy is employed by Toyota is to offset the weight penalties given when they win.
i'm sure that those Toyota mechanics are rebuilding that thing after every single race. I'm curious what the boost in on that turbo to produce that 450hp from that 4cyl. 20psi? 30psi? Maybe this should be saved for another forum.
Tim
i'm sure that those Toyota mechanics are rebuilding that thing after every single race. I'm curious what the boost in on that turbo to produce that 450hp from that 4cyl. 20psi? 30psi? Maybe this should be saved for another forum.
Tim
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Originally posted by Kevex
my other question is, why would subaru suddenly do this? develop the best engine for NA only? I think that's a first for any foreign auto makers. wiered.
my other question is, why would subaru suddenly do this? develop the best engine for NA only? I think that's a first for any foreign auto makers. wiered.
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Originally posted by Kevex
Drover:
can you explain how the pre tax can cover their RD cost?
Drover:
can you explain how the pre tax can cover their RD cost?
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Originally posted by samurai
When the engine is "tucked barely into the cabin" that is pretty damn close to the CG of the car compared to other cars. The midship usually refers to the engine that is mounted just BEHIND the cabin, but in this case, Toyota shoved the engine so far towards the cabin from the front that it might qualify as a midship mounted engine. I'm sure though that the main reason why the strategy is employed by Toyota is to offset the weight penalties given when they win.
i'm sure that those Toyota mechanics are rebuilding that thing after every single race. I'm curious what the boost in on that turbo to produce that 450hp from that 4cyl. 20psi? 30psi? Maybe this should be saved for another forum.
Tim
When the engine is "tucked barely into the cabin" that is pretty damn close to the CG of the car compared to other cars. The midship usually refers to the engine that is mounted just BEHIND the cabin, but in this case, Toyota shoved the engine so far towards the cabin from the front that it might qualify as a midship mounted engine. I'm sure though that the main reason why the strategy is employed by Toyota is to offset the weight penalties given when they win.
i'm sure that those Toyota mechanics are rebuilding that thing after every single race. I'm curious what the boost in on that turbo to produce that 450hp from that 4cyl. 20psi? 30psi? Maybe this should be saved for another forum.
Tim
emphasis the Front!!
many cars are on that layout
such as the Z
JDM STi Spec C has a front wheel 15mm more forward than that of a regular STi i am not sure that qualifys as a FM but very close.
btw i think many of the JGTC JZA 80 have 650 + HP