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Old 08-16-2003, 08:44 PM   #1
Camperguy
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I use to have a WRX :(

Question Why do I have more torque than horsepower???



I thought WRX made more HP than TQ?

Bill
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Old 08-16-2003, 09:45 PM   #2
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Hey most ppl would love a torque curve like that. You buy hp and drive torque.


What are your mods/
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Old 08-16-2003, 09:56 PM   #3
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Well at the time of the tune I had Samco I/C hoses,PDE up-pipe,Pro-Drive WR Sport axle-back,Amsoil air filter and snork remove with a velocity stack in my air box.I also had Amsoil synthetics in the engine/driveline.I`m also running a TXS st1 unichip with plug+play harness.


Bill
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Old 08-16-2003, 10:17 PM   #4
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I say there is something wrong with the dyno your car ran on. Torque and HP are ALWAYS equal at 5252 rpms. On this chart your torque and hp values cross at 4300+/-, therefor something was not right with the dyno at the time this run was performed. IMO
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Old 08-16-2003, 11:13 PM   #5
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Quote:
Originally posted by wrx320
I say there is something wrong with the dyno your car ran on. Torque and HP are ALWAYS equal at 5252 rpms. On this chart your torque and hp values cross at 4300+/-, therefor something was not right with the dyno at the time this run was performed. IMO
The scales are different on the same graph.....look closely they still seem to cross at 5252. I was about to post the same thing until I looked harder at it. They both seem to make 220hp/tq. or so at 5250.
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Old 08-17-2003, 11:20 AM   #6
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it wasn't very smart for them to list the graphs like that with two
seprate scales on the same page.
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Old 08-17-2003, 12:41 PM   #7
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oh, I kinda see that now. guess camperguy is now torqueguy
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Old 08-17-2003, 02:57 PM   #8
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I see dyno graphs with higher torque than horsepower all the time on my friends turbo 4's also.

Two examples would be my freinds FWD DSM, with basic mods, and a large 16G turbo. At the dyno he got a moderate boost spike when the turbo spooled and he made 276torque, but only 240hp because the boost dropped back down in the higher rpms. they later eleviated the spike with some tuning.

My friends Spririt R/T has done the same thing, he made 236whp, and 260-270tq because the boost spiked alittle on the dyno.
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Old 08-17-2003, 03:31 PM   #9
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You realize that the WRC cars make upwards of 500 ft.lbs. of torque and only 300hp, right? What people don't realize is that turbo = torque... it's just where you place that torque in the rev band that changes your horsepower curve.
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Old 08-17-2003, 05:12 PM   #10
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Easiest way to think of it:

more torque equals bigger booms

more hp equals bigger booms and/or faster booms

Turbos do both, depending on setup and tune. They force more air volume so you can use burn more fuel which makes bigger booms. They also can increase intake air velocity which fills rapidly moving cylinder chambers which makes faster booms.
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Old 08-17-2003, 06:54 PM   #11
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Quote:
Originally posted by brizey
more torque equals bigger booms

more hp equals bigger booms and/or faster booms

What physics textbook did you use?


Full_Clip goes back to OT.
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Old 08-17-2003, 09:32 PM   #12
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That is exactly the point. Makes it easy to explain to people without getting into thermodynamics.

Besides, I'm an EE, and I hated thermo way back when.
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Old 08-18-2003, 01:47 AM   #13
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I'm assuming your unichip wasn't dyno tuned? I'd put my money on the unichip for this. All the properly tuned WRX dynos I've seen do make more HP than torque... always close but still. I suspect the unichip tune is a bit conservative up top causing a bit less peak HP. This is just an educated guess though. Give TXS a call.

-- Ed
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Old 08-18-2003, 08:54 AM   #14
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Quote:
Originally posted by Vaus
I'm assuming your unichip wasn't dyno tuned? I'd put my money on the unichip for this. All the properly tuned WRX dynos I've seen do make more HP than torque... always close but still. I suspect the unichip tune is a bit conservative up top causing a bit less peak HP. This is just an educated guess though. Give TXS a call.

-- Ed
Actually, that is after a dyno tune.
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Old 08-18-2003, 01:59 PM   #15
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I suspect this is because the stock turbo is fading quickly up top thus your hp falls off... if you held the 16-17 psi all the way to redline you'd see hp numbers that were higher... but his graph is very common on the TD04 it looks just like mine.
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Old 08-18-2003, 03:53 PM   #16
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Quote:
Originally posted by MustGoFast
I suspect this is because the stock turbo is fading quickly up top thus your hp falls off... if you held the 16-17 psi all the way to redline you'd see hp numbers that were higher... but his graph is very common on the TD04 it looks just like mine.
No way... the turbo does fade up top but even with a proper boost taper up top most WRX's make more peak HP than peak TQ.

You're running an MBC right? Maybe the MBC is actually holding too much boost up top sending the turbo out of its effeciency range robbing you of a little HP up top. That's why the newer ECUs taper boost much more up top.

-- Ed
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Old 08-18-2003, 09:02 PM   #17
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Quote:
Originally posted by Vaus



You're running an MBC right? Maybe the MBC is actually holding too much boost up top sending the turbo out of its effeciency range robbing you of a little HP up top. That's why the newer ECUs taper boost much more up top.

-- Ed
IIRC Bill DOSENT have an MBC. He does have a sweet wagon however
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Old 08-18-2003, 10:44 PM   #18
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Why didn't they run you out to 7K? looks like they stopped 500rpm short. I know there isn't much up there on the WRX but...

Mixed scale graphs vs a common scale are probably one of the least professional looking More torque isn't a bad thing, I'd just always be wondering if there is some piece missing since you do see more graphs with bigger HP #'s on the forum..
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Old 08-19-2003, 11:45 AM   #19
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Those are pretty good numbers!!!

I have up and downpipe, 3" high flow cat, and UTEC with a stage 2 dynotune, and I top out at 210hp and 230 torque...

you must have a strong running car!
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Old 08-19-2003, 02:36 PM   #20
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Those are very good numbers! I have a similar setup and I too have more torque... 212hp/229ftlbs...very similar to texrex....
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Old 08-19-2003, 05:19 PM   #21
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Quote:
No way... the turbo does fade up top but even with a proper boost taper up top most WRX's make more peak HP than peak TQ.
You're running an MBC right? Maybe the MBC is actually holding too much boost up top sending the turbo out of its effeciency range robbing you of a little HP up top. That's why the newer ECUs taper boost much more up top.
no most tuned WRX's on a stock turbo have more torque... in fact all the ones I've ever seen have... no I'm not running an MBC and yes the cause is the lower boost at redline....

it's not just the ECU its also the turbo just running out of steam... I have engine management so I can stop the ecu from pulling the boost and it still fades very noticeably
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