JamieP
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Everything posted by JamieP
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I started to write a big reply then could not be arsed and deleted it. Most of what you are saying i know and agree with, i cant comment on Abbey as ive never used them. If you dont care about the numbers and its all in the way the car drives why post in this thread and why have your dyno numbers in your sig?
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So you are saying its just Dans dyno that over reads? Myself and ricky49 got the same numbers from TDI and AME.
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Come back Scott, i miss you.
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Correction factor has no effect on the difference between DIN and SAE. When my new turbo is fitted i will take it to SRR and a hub dyno and a dynojet to see what the difference is.
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The difference between DIN and SAE is minimal, at a 1000bhp you are only talking 14bhp.
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375 at the wheels is a very good figure for a bpu, up there with the highest ive ever heard.
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The best way to understand it and see the difference between dynos is do what i did mate, put your own car on them and see the difference, imo hub figures from a rototest or dynapack are about the same as a flywheel number you would get from a dyno dynamics rolling road. Im going the other way now, small turbo going back on soon, i miss the super fast spool.
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When the dyno does the working out the results seem right, hubs figures + any sort of % the end customer adds seem miles out from what ive seen, hub dynos dont have a option to give you a flywheel output according to TDI and AME. What do you work your car out to be? over 900 bhp iirc? go put it on a dyno dynamics rolling road and you will be in for a big shock imo.
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So you made 394 bhp at the hubs on a hub dyno and 375 at the flywheel on a rolling road? same sort of results that ive seen.
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I'm not saying you have to use a rolling road, use any dyno you like, just don't convert the numbers yourself.
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I will still quote flywheel figures if ive used a dyno such as SRR, I just wont make my own numbers up, use the figures the dyno operator has given you and state if its fly/hub/wheel bhp and there is no confusion.
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Nice car, ive never seen a dyno like that before, unless its a 4wd supra?
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I was going to say the same, nobody ever seems to use nitrous, ive used it for years. Next na i pick up i might bung in 500bhp of nitrous just to see what happens
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Ha, "id say its f**ked" -
Fast and Furious Replica (Orange Supra) - Take 2
JamieP replied to pbryant_knight's topic in Supra Chat
Very neat. -
Its a hard subject as a lot of these cars that add the % to hub figures I class as friends, I dont want to upset anyone saying there car has nowhere near that bhp, my turbo is not even rated to 1300bhp, yet using the hub figures and adding 15% i can make that power on pump fuel at not much boost, when in reality i doubt i have any more than a 1000bhp.
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Spot on.
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Show me the SRR 742bhp dyno graph Jamsey.
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John, go stick it on a local dyno dynamics rolling road and see what it makes mate. What was your hub Bhp?
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My Super Widebody Aero VVTi Turbo 6sp project
JamieP replied to Ibrar Jabbar's topic in mkiv Supra Projects
These are all SRR, yours spools miles faster than anything on there, That will be a great drive. http://2bartuning.com/dynographs/ -
My Super Widebody Aero VVTi Turbo 6sp project
JamieP replied to Ibrar Jabbar's topic in mkiv Supra Projects
That spools super fast mate, 4000rpm you are making 400bhp, ive never seen any supra spool that quick. -
Dyno numbers will always be a big debate, some can handle the truth, others cant. My car put down 1132bhp at the hubs on a dynapack, imo the car has around a real 1000bhp at the crank.
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Seen it many times, and with my own car, its well documented on the net also. Try this dyno calculator, 700rwhp on a dyno dynamics rolling road = 840 at the hubs on a dynapack. http://mkiv.supras.org.nz/dyno.htm My car did 902bhp at the flywheel at SRR on a dyno dynamics rolling road at 1.5bar, couple of days later it made 975 at the hubs on a dynapack same boost.
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Flywheel at SRR, hub bhp is about the same as flywheel imo. I love Jamesy but that car was never 825bhp, more like 650 at a push id say. forget adding 20% to hub figures. He says his new car feels loads quicker and thats 607bhp on a dyno dynamics rolling road, hub figures are bullsh1t.
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Its hard to say what the perfect power for a street car is, Depends on a lot of things, like how much money you are prepared to spend, and can you handle a 700+bhp RWD car? I went to far with mine, Its huge fun but costs to much to run for me so im going back down to the 800 bhp range, I will most likely live longer an all. Mine did about 20,000 miles at 600ish bhp, soon as i went to 730bhp it broke in a matter of weeks, bent a rod on a top speed run.
