Fri Dec 15, 2017 9:12 am |
Post subject: Transmission losses |
Wull user

Joined: 19 Jul 2013 Posts: 273 Location: Killin
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How much bhp is lost “roughly” on the RA dyno with the Impreza’s?
I’m trying to figure out my options as I might try my best to keep the car within Class D, it’ll be tough though unless I decided against another map, but keeping the power as is will have me down a bit in Class D. _________________ ND spec'd Evo 8
Impreza bug sti track car
Wagon SL ppp |
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Sat Dec 16, 2017 9:54 pm |
Post subject: |
AK Site Admin

Joined: 27 Nov 2006 Posts: 20178 Location: Aberdeen
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about 14% from mem _________________ Impreza Race Car, 1200kg, 480bhp - SLS/SMRC
Mini Race Car x3 - SMRC, SMRC, SLS
911 - 1981 Air Cooled 3.0
500 - 1969 Fiat 500 L
X5 40d M Sport
Mini Cooper Park Lane
MB Sprinter Camper
Track Scotland |
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Wed Jan 17, 2018 3:58 pm |
Post subject: |
Arch user
Joined: 14 May 2015 Posts: 158
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Any ideas of losses on front wheel drive cars? |
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Wed Jan 17, 2018 5:02 pm |
Post subject: |
HummuH SMRC S&S Rep

Joined: 05 Jan 2012 Posts: 2417 Location: Sniffing petrol
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Arch wrote: | Any ideas of losses on front wheel drive cars? |
I've always worked to 12% to 15% on my FWD cars. I would have thought AWD would have been more like 15% to 20% but have no idea as to exactly how RA's dyno compares to others. _________________ MD Racing
SMRC Sports & Saloons Facebook Page |
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Wed Jan 17, 2018 10:30 pm |
Post subject: |
Arch user
Joined: 14 May 2015 Posts: 158
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HummuH wrote: | Arch wrote: | Any ideas of losses on front wheel drive cars? |
I've always worked to 12% to 15% on my FWD cars. I would have thought AWD would have been more like 15% to 20% but have no idea as to exactly how RA's dyno compares to others. |
I was surprised how low the losses were on the Impreza worked out at about 17.5% so probably would be in the 12-15% area although I suspect it's not a linear loss graph |
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Fri Jan 19, 2018 11:12 am |
Post subject: Re: Transmission losses |
scottish scrutineer established user
Joined: 27 Mar 2013 Posts: 593
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Wull wrote: | How much bhp is lost “roughly” on the RA dyno with the Impreza’s?
I’m trying to figure out my options as I might try my best to keep the car within Class D, it’ll be tough though unless I decided against another map, but keeping the power as is will have me down a bit in Class D. |
You can always add some ballast to stay within the Class. See the SLS Regulations for the restrictions on the amount of ballast that can be fitted within the car.
Or you could buck the trend and eat more pies  _________________ Renny
MotorSport UK Scrutineer |
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Fri Jan 19, 2018 11:56 am |
Post subject: |
andybell established user

Joined: 16 May 2013 Posts: 1267
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Fri Jan 19, 2018 12:10 pm |
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AK Site Admin

Joined: 27 Nov 2006 Posts: 20178 Location: Aberdeen
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i was really wondering wtf i was loading there slow connection, and the image stopped just after her nose/top lip
taxi.... _________________ Impreza Race Car, 1200kg, 480bhp - SLS/SMRC
Mini Race Car x3 - SMRC, SMRC, SLS
911 - 1981 Air Cooled 3.0
500 - 1969 Fiat 500 L
X5 40d M Sport
Mini Cooper Park Lane
MB Sprinter Camper
Track Scotland |
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Fri Jan 19, 2018 8:10 pm |
Post subject: |
Wull user

Joined: 19 Jul 2013 Posts: 273 Location: Killin
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AK wrote: | i was really wondering wtf i was loading there slow connection, and the image stopped just after her nose/top lip
taxi.... |
 _________________ ND spec'd Evo 8
Impreza bug sti track car
Wagon SL ppp |
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