fastcar Posted September 30, 2013 Share Posted September 30, 2013 Hi peeps Seeing I was at Japfest this Sunday and there was a dyno there I thought i would see how much I was running at BPU. I was impressed at the results of 467BHP at the fly but have been wondering what I would be running at the wheels. So wanted to know what sort of percentage of power does the transmission take away from that? Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 Hi peeps Seeing I was at Japfest this Sunday and there was a dyno there I thought i would see how much I was running at BPU. I was impressed at the results of 467BHP at the fly but have been wondering what I would be running at the wheels. So wanted to know what sort of percentage of power does the transmission take away from that? I had a run too and got a print out of my wheel horse power, they were using a 12% correction Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 I had a run too and got a print out of my wheel horse power, they were using a 12% correction Odd I always thought it was 15-20%. Suppose every dyno is different, Depends on who you believe for the transmission loses. Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 Odd I always thought it was 15-20%. Suppose every dyno is different, Depends on who you believe for the transmission loses. Yeah i think a lot of places use a different factor for manuals and autos...... I'm still not putting much stock in my result, its a bit too high for me to believe really! Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted September 30, 2013 Share Posted September 30, 2013 That sounds incredibly high for a BPU Supra. Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 That sounds incredibly high for a BPU Supra. You should hear my result! Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted September 30, 2013 Share Posted September 30, 2013 You should hear my result! Enlighten us? Quote Link to comment Share on other sites More sharing options...
Sheefa Posted September 30, 2013 Share Posted September 30, 2013 (edited) Far too high for a BPU Supra. I would expect 400fwhp maximum if you are running stock injectors etc and 1.2 bar. Mine range 335rwhp at 1 bar and that was on hybrids at Dynodaze. Ignore Fwhp and get it on a PROPER dyno. Transmission losses max 12% manual although I would say that's high judging by what I've read, 10% more norm. Edited September 30, 2013 by Sheefa (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 Yeah i think a lot of places use a different factor for manuals and autos...... I'm still not putting much stock in my result, its a bit too high for me to believe really! I do think yours is hard to believe, But I doubt it would be far from it! You aren't really BPU are you? Lol Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 (edited) Enlighten us? I'm perfectly capable of disbelieving the result without the need for the rest of the forum to tell me its not worth the paper its written on...... that being said, it came out at at 450whp.... at 17psi on 440s..... Far too high for a BPU Supra. I would expect 400fwhp maximum if you are running stock injectors etc and 1.2 bar. Mine range 335rwhp at 1 bar and that was on hybrids at Dynodaze. Ignore Fwhp and get it on a PROPER dyno. Transmission losses max 12% manual although I would say that's high judging by what I've read, 10% more norm. Thats the correction factor they were using mate, I have two printouts, one with 450whp on it and the other with 505 fwhp on it, your right its probably on the high side though.... as is the wheel horse power haha Edited September 30, 2013 by Justin Bieber grammer (see edit history) Quote Link to comment Share on other sites More sharing options...
Sheefa Posted September 30, 2013 Share Posted September 30, 2013 (edited) I'm perfectly capable of disbelieving the result without the need for the rest of the forum to tell me its a not worth the paper its written on...... that being said, it came out at at 450whp.... at 17psi on 440s..... Thats the correction factor they were using mate, I have two printouts, one with 450whp on it and the other with 505 fwhp on it, your right its probably on the high side though.... as is the wheel horse power haha Jesus buddy running what 1.2 bar? Ha pub dyno me thinks. I can't see it being possible unless they've ramped the boost up to 1.6 on those ceramics! I'm going to check the Street Turbocharging manual. Brb. Edited September 30, 2013 by Sheefa (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 I'm perfectly capable of disbelieving the result without the need for the rest of the forum to tell me its not worth the paper its written on...... that being said, it came out at at 450whp.... at 17psi on 440s..... Thats the correction factor they were using mate, I have two printouts, one with 450whp on it and the other with 505 fwhp on it, your right its probably on the high side though.... as is the wheel horse power haha I think though Biebs if you had some 550/650cc injectors and something controlling them AFR's you wouldn't be too far away! Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted September 30, 2013 Share Posted September 30, 2013 I'm perfectly capable of disbelieving the result without the need for the rest of the forum to tell me its not worth the paper its written on...... that being said, it came out at at 450whp.... at 17psi on 440s..... On initial inspection that does look a little bit erm... optimistic. What's the full spec of the engine again? Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 On initial inspection that does look a little bit erm... optimistic. What's the full spec of the engine again? Its a Whifbitz stage 1 forged bottom end, with 264 cams and dual valve springs in the head, stage 1 hybrids (Jspec's rebuilt with steel internals) with 440cc injectors and an ebay intercooler I also haven't been running a restrictor ring. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 Its a Whifbitz stage 1 forged bottom end, with 264 cams and dual valve springs in the head, stage 1 hybrids (Jspec's rebuilt with steel internals) with 440cc injectors and an ebay intercooler I also haven't been running a restrictor ring. What do you get with the Whifbitz stage 1 forged bottom end? Forged pistons?... Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted September 30, 2013 Share Posted September 30, 2013 What do you get with the Whifbitz stage 1 forged bottom end? Forged pistons?... IIRC its CP pistons, Eagle H beam rods, ACL bearings, ARP bolts.... Hopefully Mike Ward or Paul Whiffin will see this and jump in with the correct spec if I've made a mistake! Quote Link to comment Share on other sites More sharing options...
Gpro Posted September 30, 2013 Share Posted September 30, 2013 out of curiosity why build the engine for such low power? Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 IIRC its CP pistons, Eagle H beam rods, ACL bearings, ARP bolts.... Hopefully Mike Ward or Paul Whiffin will see this and jump in with the correct spec if I've made a mistake! Decent setup! Quote Link to comment Share on other sites More sharing options...
Abz Posted September 30, 2013 Share Posted September 30, 2013 out of curiosity why build the engine for such low power? Who said its gonna stay low Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 out of curiosity why build the engine for such low power? He bought it 2nd hand for very cheap Quote Link to comment Share on other sites More sharing options...
Sheefa Posted September 30, 2013 Share Posted September 30, 2013 out of curiosity why build the engine for such low power? Reliability and the safety in the knowledge he can upgrade the rest when he wants. Good shout if you ask me. That's damn good figures mate, I didn't know yours was modified so much. I would be wary about cranking up the boost on 440s though mate. What is controlling the fuelling, stock ECU ? Quote Link to comment Share on other sites More sharing options...
fastcar Posted September 30, 2013 Author Share Posted September 30, 2013 I thought mine was a little high. I'm running 1.3bar without restrictor ring on J-spec twins and 440 injectors. So if I take the 12% off it's saying 410.96 BHP at the wheels:search: Quote Link to comment Share on other sites More sharing options...
Littler Posted September 30, 2013 Share Posted September 30, 2013 Dyno figures aside, I will point out Bieber's car is stupidly fast, the video that I'm uploading at the minute shows mine and his little 'sprint' and mine is known for being a strong BPU @1.1 bar with 405BHP (obviously my figure can also be questioned) at the fly, watch how he shifts! Quote Link to comment Share on other sites More sharing options...
Sheefa Posted September 30, 2013 Share Posted September 30, 2013 :d:D. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted September 30, 2013 Share Posted September 30, 2013 I'm running 1.3bar without restrictor ring on J-spec twins and 440 injectors Risky I'd be fitting a restrictor ring If I were you! You are surely overspinning the stock twins. Quote Link to comment Share on other sites More sharing options...
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