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Old 08-26-2002, 04:49 PM   #1
flames
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Member#: 23471
Join Date: Aug 2002
Location: 330whp WRX - Sold
Lightbulb hp opinions wanted

hey guys,

looking for educated guess as to what i am running to the wheels with the following ( i have no access to dyno ). my car is very, very quick, but i have not had it to a strip yet either. i've been told 420hp at the crank with Yoshio ecu. it feels like it....staying right with ZO6's, and i'm not a great driver (yet).

blitz: fmic, dd bov, sbc-id 20psi, 8 range plugs,
nurspec r, godspeed up/down pipe, catless all the way
unichip - soon to be a custom Yoshio ecu.
sti injectors, power enterprise fuel pump
power enterprise 1818 turbo
zerosports headers
ats cc cluth/flywheel combo

what do you think???
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Last edited by flames; 08-26-2002 at 05:00 PM.
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Old 08-26-2002, 04:56 PM   #2
NotoriousWRX
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Any aftermarket uppipe or downpipe? Any cats?

I think that 420 might be way off.
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Old 08-26-2002, 04:58 PM   #3
flames
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oops,

no cats, godspeed uppipe and downpipe, 420 at crank, not wheel....i'll edit my post

thanks
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Old 08-26-2002, 09:41 PM   #4
hotrod
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e85forum.net

Default go to the drags

With out access to a dyno the most reliable and by far the cheapest way to determine your wheel horsepower is to make a 1/4 mile run and see what trap speed you get. The trap speed is very reliable indicator of engine power, and highly independent of things like launch technique. Once you get the trap speed you can easily figure your hourse power by using one of the many on-line calculators. The only other piece of info you will need is an accurate as raced weight.

Larry
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Old 08-27-2002, 01:03 PM   #5
flames
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thanks - great information....what exactly is "trap speed" & how is it measured?

flames
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Old 08-27-2002, 05:16 PM   #6
jmott
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Quote:
Originally posted by flames
thanks - great information....what exactly is "trap speed" & how is it measured?

flames
the drag strip measures it by seeing how long it takes you to pass two little sensors at the end of the strip.

you will get back a slip with your elapsed time and speed at the end of the 1/4mile (trap speed)
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Old 08-27-2002, 06:41 PM   #7
silverscooby
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Sounds like an awesome car. Who tuned your unichip?
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Old 08-29-2002, 11:54 AM   #8
flames
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most of the work done on my wrx by Godspeed Inc. Dan Ponze is the owner. dan had his own wrx which he R&D'd all mods on prior to making recommendations. nothing left to chance, no mix/max ghetto mods - just proven power.

i have had two unichips....first one was not good. hesitation, unpredictable. second unichip was actually tuned & dynoed on dan's project wrx which had similar mods to mine....much better performance. dan could tell you more specifics....

fmic, plus properly tuned unichip made a huge, i mean huge difference in my car's performance.

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Old 08-30-2002, 02:49 PM   #9
mbiker97
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I was at Godspeed the other day and Al was telling about your car. I would love to see it sometime, but I know the mod bug would be even worse after just seeing it.

Seth
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Old 08-30-2002, 09:10 PM   #10
Carlo
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Location: 367 WHP / 460 at the Crank!
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367 WHP!
460 HP at the crank!

Default Re: hp opinions wanted

Quote:
Originally posted by flames
hey guys,

looking for educated guess as to what i am running to the wheels with the following ( i have no access to dyno ). my car is very, very quick, but i have not had it to a strip yet either. i've been told 420hp at the crank with Yoshio ecu. it feels like it....staying right with ZO6's, and i'm not a great driver (yet).

blitz: fmic, dd bov, sbc-id 20psi, 8 range plugs,
nurspec r, godspeed up/down pipe, catless all the way
unichip - soon to be a custom Yoshio ecu.
sti injectors, power enterprise fuel pump
power enterprise 1818 turbo
zerosports headers
ats cc cluth/flywheel combo

what do you think???
OK, lets try doing a comparison for *****s and Giggles.

We'll start by assuming you're running pretty much the same as a TurboXS Stage 4 setup which puts out 270whp at about 18 psi. You are running the PE1818 which dynod a little less then the VF-30 so we'll subtract 10 hp. You mentioned your completely cat-less so we're going to add about 8 hp to the number for this. You didn't mention after market muffler so we're going to subtract 5 hp for this. We'll assume the Unichip is a wash. You've got the STI injectors and fuel pump to power the injectors so again we're at a wash. The clutch/flywheel isn't going to do much for hp so we're not worried about these. I don't know what the zerosport headers will do but lets "assume" you gain 20hp from them. You're running slightly more boost then a "standard" stage 4 setup so assuming it's still in the effeciency range of the turbo we'll add 15 hp for this. You're also running a blitz front mount IC which should do about the same as the new TXS top mount so we'll give you another 20 hp for this.

270 hp base Stage 4
+ 8 hp - cat-less
- 5 hp - didn't mention aftermarket muffler
- 10 hp - Turbo
+20 hp - zero sport headers
+15 hp - 2psi more boost
+20 hp - Blitz front mount IC
---------------------------------------
318 hp at the wheels

Now if you take this 318 wheel hp and use the "fancy" Godspeed or TurboXS math and multiply this by roughly 1.35 you get.

429 Crank Horse

I did this very quickly from memory so if I messed something up sue me But to answer you question, yes you are in the 420-430 crank range using "conventional" crank math

Carlo
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Old 09-01-2002, 05:47 AM   #11
spool_fool
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Default

I guess I'll post this here. I have seen lots of AWD dyno results for the WRX. My last car which was a Honda was figured at 15% DriveTrain loss. I have seen 2 dyno results from stock WRXs which were 167whp and 147whp. I figure the DriveTrain loss to be around 25%-30%. Is this right? What does a stock WRX dyno at?

So if 420x27% = 113hp - 420 = 307whp that should be about right. Of course all engines will have some variation.
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Old 09-01-2002, 11:21 AM   #12
Sordid Philosopher
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Default Re: Re: hp opinions wanted

Quote:
Originally posted by Carlo

270 hp base Stage 4
+ 8 hp - cat-less
- 5 hp - didn't mention aftermarket muffler
- 10 hp - Turbo
+20 hp - zero sport headers
+15 hp - 2psi more boost
+20 hp - Blitz front mount IC
---------------------------------------
318 hp at the wheels
We have about 25% drivetrain loss so....

318/0.75 = 424 hp at the crank (approx).

Now if I were you, I would stick to whp numbers since a stock Z06 (405 crank hp) runs about 345 whp, he should be faster.

Great ride.
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Old 09-01-2002, 12:08 PM   #13
Carlo
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Join Date: May 2002
Location: 367 WHP / 460 at the Crank!
Vehicle:
367 WHP!
460 HP at the crank!

Default Re: Re: Re: hp opinions wanted

Quote:
Originally posted by Sordid Philosopher


We have about 25% drivetrain loss so....

318/0.75 = 424 hp at the crank (approx).

Now if I were you, I would stick to whp numbers since a stock Z06 (405 crank hp) runs about 345 whp, he should be faster.

Great ride.
Just for info on this. This I was using numbers from TurboXS as the "baseline", I also used their dyno numbers to come up with the 1.35 multiplier.

The stock car dynoed at 168.5 hp at the wheels and has crank hp of 227. 227/168.5=1.347 which I rounded to 1.35. 318(whp)x1.347=428.3 at the crank
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Old 09-01-2002, 12:48 PM   #14
Sordid Philosopher
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2003 WRX Sedan
White

Default Re: Re: Re: Re: hp opinions wanted

Quote:
Originally posted by Carlo


Just for info on this. This I was using numbers from TurboXS as the "baseline", I also used their dyno numbers to come up with the 1.35 multiplier.

The stock car dynoed at 168.5 hp at the wheels and has crank hp of 227. 227/168.5=1.347 which I rounded to 1.35. 318(whp)x1.347=428.3 at the crank
I understand - the reason I use 170 whp is that is about the highest I have seen. The stock ECU can cut your HP and that shouldn't be included in your drivetrain loss since it has nothing to do with the drivetrain. The other reason I use 25% loss is that it is easy to add/subtract 25% in my head
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Old 09-02-2002, 06:53 PM   #15
krave
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296 whp

Default

i think you should be able to get around 325WHP
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