Your dyno predictions
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Your dyno predictions
I'll be dynoing this saturday afternoon, curious what numbers you guys think i will put down. I'll buy a cookie for whoever is closest
-'93' Sport sedan 5mt
-legazee intake, cone filter
-MSD ignition/magnecor plug wires/ngk coppers
-3" bellmouth turbo-back exhaust (catless, straight through melon shooter)
-~10 psi boost
MK
-'93' Sport sedan 5mt
-legazee intake, cone filter
-MSD ignition/magnecor plug wires/ngk coppers
-3" bellmouth turbo-back exhaust (catless, straight through melon shooter)
-~10 psi boost
MK
Last edited by mTk on Fri May 14, 2004 5:17 am, edited 2 times in total.
1992 BC672 AWD 5MT
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Absolutely unacceptable! I want numbers!mTk wrote:Guys all guessed high Max psi turned out to be 9.3. Looks like FG gets the cookie
MK
-Matt
'92 SS 5mt. All go and no show. Sold :(
'94 Audi UrS4 Modded (new project)
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Oh... and I hope the fucker get bunked with Gunter, arrested for raping Gorillas.[/quote]
'92 SS 5mt. All go and no show. Sold :(
'94 Audi UrS4 Modded (new project)
'96 Outback 5mt.
'07 Legacy 2.5i SE
[quote="Redlined"]
Oh... and I hope the fucker get bunked with Gunter, arrested for raping Gorillas.[/quote]
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That number is meaningless unless you put it next to other numbers from other AWD cars on the same dynamometer, though, right? Cuz they all have different internal friction and the friction between the rollers and the tires can vary too...
I remember the AWD dyno Sport Compact Car put their second Project Impreza on gave them a number like 90 hp stock.
I remember the AWD dyno Sport Compact Car put their second Project Impreza on gave them a number like 90 hp stock.
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If using a dyno for anything than tuning, I think the only decent numbers are ones calculated from a drag run and a weigh in. I personally just want my car to be fast enough to be fun whatever those numbers are. There are too many variables to really try to get hard numbers to quote.
Steve
Steve
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Nah, friction between the rollers and the tires doesn't really vary. A car is strapped down on a dyno, they don't have the tires sandwiched between rollers. If the tire is spinning the drum, the variance in tires wouldn't effect anything. The drum will be spinning as fast as the wheels, and the only thing holding the wheels to the drums is the weight of the car. Straps just keep the car from moving fore and aft. You wouldn't put down less power if you had drag slics, and wouldn't put down more power if you had "sticky as ice" tires.
Dynojet seems to be the most relaible and accepted numbers. On a Dynojet, a stock WRX puts down right around 150hp. STi puts down around 230. Forester 2.5XT puts out around 170.
Edit: Typo on WRX number.
Dynojet seems to be the most relaible and accepted numbers. On a Dynojet, a stock WRX puts down right around 150hp. STi puts down around 230. Forester 2.5XT puts out around 170.
Edit: Typo on WRX number.
Last edited by BAC5.2 on Sun May 16, 2004 10:41 pm, edited 1 time in total.
2009 Outback 2.5XT. 5MT. Satin White Pearl.
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Sounds a little high. I made a typo, the WRX puts around 150 to the wheels. I'd say he makes more like 200bhp.LegacyT wrote:so basically you got around 220 chp.
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But there are lots of variables between dynos, daily conditions, and even operators that can cause more than enough variables to make HP comparisons between cars nearly pointless unless done on the same day at the same place, etc. SO what do those numbers really mean for purposes outside tuning? If you can hit the 1/4 in 13 flat, you know you can hit the 1/4 in 13 flat. I'm just saying that I prefer performance numbers to calculate, but maybe I shouldn't have as I don't really want to pull this thread off topic. (I'm giving it a go of trying that for once)
Steve
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Phil - I meant the friction between the tires and rollers varies from dyno to dyno. Just like 128034710901 other factors, which means you can only compare dyno numbers if they all came from the same dyno.
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I don't quite see how though. The only thing holding the car down on the rollers is the weight of the car. How can the weight of the car vary from dyno to dyno? In the end, the rollers are still spinning the same speed as the wheels are.
Laurel - What dyno was he on? TurboXS is right down the street from me, and they put 230 down at the wheels on their dynojet. It's been a little while since I saw the graphs, but I believe the peak number was 230.
Laurel - What dyno was he on? TurboXS is right down the street from me, and they put 230 down at the wheels on their dynojet. It's been a little while since I saw the graphs, but I believe the peak number was 230.
2009 Outback 2.5XT. 5MT. Satin White Pearl.
2009 Impreza 2.5i Premium. Blue.
[quote="scottzg"]...I'm not a fan of the vagina...[/quote][quote="evolutionmovement"]This will all go much easier if people stop doubting me.[/quote]
2009 Impreza 2.5i Premium. Blue.
[quote="scottzg"]...I'm not a fan of the vagina...[/quote][quote="evolutionmovement"]This will all go much easier if people stop doubting me.[/quote]