matt johnson Posted September 22, 2005 Share Posted September 22, 2005 Can find the BHP figure easily, which seems to quoted as around 225 but can't find the Torque figure. Anyone help me out? Link to comment Share on other sites More sharing options...
Steve W Posted September 22, 2005 Share Posted September 22, 2005 Is THIS what you're after Matt ?? > > > Link to comment Share on other sites More sharing options...
Steve W Posted September 22, 2005 Share Posted September 22, 2005 ....and i know you didn't ask for it...but.... > > > > > Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 yeah thats great, thanks I went to a rolling road day and the car made 227.4BHP and 183.4lbft torque Torque seems a bit down, umm whats up i wonder? Also only 7 extra bhp when its decatted and has apexi induction pipe and filter and enlarged/sports down pipes, somethings not quite right i feel Link to comment Share on other sites More sharing options...
Guest chiefvinso Posted September 22, 2005 Share Posted September 22, 2005 I dont think normally aspirated cars make much more bhp decatted and some pink like crazy unless you start to modify ecu's. Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 torques down by a good 25lbft, what could be up with that? Link to comment Share on other sites More sharing options...
Guest chiefvinso Posted September 22, 2005 Share Posted September 22, 2005 Could be the fuelling - any signs of pinking under load. I'm not claiming to be right on this but you have the air flowing more freely and I assume you are on standard ecu. Maybe try running on higher octane fuel? Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 the bhp graph is pretty good but the torque graph is spikey and has a few low spots, a large one just before 5k but between 3k and 5k it looks low anyways Link to comment Share on other sites More sharing options...
letmeshowyou Posted September 22, 2005 Share Posted September 22, 2005 torque reduction could be that you've actually reduced back pressure too much with all thats been done... Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 i wouldn't say i can hear any pinking, but possibly feels like the car surges a little. I'm guessing the ecu is standard the car is how i bought it and i run it on 97 octane fuel and had octane booster in when Rolling roaded. I've done no mods to it, just have receipts for what has been. Do you think it would be worth get it checked over with a good jap specialist? Link to comment Share on other sites More sharing options...
letmeshowyou Posted September 22, 2005 Share Posted September 22, 2005 also is yours manual or auto? doesn't have lightened flywheel or some such does it? Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 manual, not that i know of Link to comment Share on other sites More sharing options...
Pete Posted September 22, 2005 Share Posted September 22, 2005 Plugs changed recently? Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 i just serviced it as the igntion parts where in a right state. I put in new plugs,rotor arm,dizzy cap and ht leads Link to comment Share on other sites More sharing options...
Digsy Posted September 22, 2005 Share Posted September 22, 2005 torque reduction could be that you've actually reduced back pressure too much with all thats been done... Yep. Reducing exhaust back pressure is a great way of sodding up your low to mid-range torque. Link to comment Share on other sites More sharing options...
letmeshowyou Posted September 22, 2005 Share Posted September 22, 2005 i really do suspect not enough back pressure - how big are these downpipes and what is the rest of the exhaust? Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 its got a hks hi power muffler back box, looks fairly large bore 3.5"ish all the rest of the way. Not really sure on the front pipes, i've got a receipt saying hyper front pipes from hyper sports and racing. Link to comment Share on other sites More sharing options...
matt johnson Posted September 22, 2005 Author Share Posted September 22, 2005 just had a look at the front pipe and well its obvioulsy there to remove the front cat i take it. Coming from back box direction in goes from the same 3.5" and vees off into 2 maybe 2" pipes up to the manifold Link to comment Share on other sites More sharing options...
matt johnson Posted September 24, 2005 Author Share Posted September 24, 2005 anyone else care to make some comments? Mods feel free to move this thread as its turned into more of a technical dicussion now Link to comment Share on other sites More sharing options...
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