neo2810 Posted March 19, 2011 Share Posted March 19, 2011 AAS in Newcastle are machining an intake manifold for a racing NA and will be fitting BMW throttle bodies and some other bits and bob's to make it effective. They are pretty sure that with what they are doing to it, they will acheive 300bhp without the expense it's taken in the past. The car already has a aftermarket ECU, some weight reduction (no aircon, etc), some engine rework and an AAS tubular manifold but even so, I'll be keen to see their power results after fitting this. Nevertheless, once they have everything in place, they will be looking to sell the part, so I'll keep you updated on how it's going. Just on a side note, the overfuelling I was getting after fitting the manifold and intake has disappeared so it looks like the stock ECU is quite capable of learning a new system and adjusting itself. It just takes a good few weeks. Cold air chamber I'm building is well underway as well so we'll see what difference it makes. I'm not expecting much or even any increase in power but I do expect it to stop power dropoff once the engine bay heats up. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 19, 2011 Share Posted March 19, 2011 Really cant see the fitting of BMW throttle bodies and a stand alone ECU making 300BHP, i think maybe the "other things" will be the deciding factor;) Also the std ECU doesn't learn, other than idle control, as it stays in closed loop until late in the RPM range, so it runs on the lambda feedback for most of the time and after that a fixed map with knock control. Quote Link to comment Share on other sites More sharing options...
keron Posted March 19, 2011 Share Posted March 19, 2011 we done this mod a few mths ago...m3 throttles on the na! sounds ace! just need to sort a piggy back ecu out now...maybe some bigger injectors...its on my bros blue sup...were looking into cams etc to try and get the most out of it... Quote Link to comment Share on other sites More sharing options...
Digsy Posted March 19, 2011 Share Posted March 19, 2011 AAS in Newcastle are machining an intake manifold for a racing NA and will be fitting BMW throttle bodies and some other bits and bob's to make it effective. Need to know what the other bits and bobs are, really. Quote Link to comment Share on other sites More sharing options...
Abz Posted March 19, 2011 Share Posted March 19, 2011 That is quite an interesting gain in power. Need to know what the other bits and bobs are, really. Good point, could you list the parts needed? Might help some NA owners. Quote Link to comment Share on other sites More sharing options...
jevansio Posted March 19, 2011 Share Posted March 19, 2011 Can anyone explain to me why ITBs "sound" any different to a single throttle when used with a road car airbox type intake setup? Quote Link to comment Share on other sites More sharing options...
Guest ugp Posted March 19, 2011 Share Posted March 19, 2011 Can anyone explain to me why ITBs "sound" any different to a single throttle when used with a road car airbox type intake setup? They dont, only when you've got open bellmouths, then they do though Quote Link to comment Share on other sites More sharing options...
Nic Posted March 19, 2011 Share Posted March 19, 2011 They dont, only when you've got open bellmouths, then they do though http://www.ysr.gr.jp/2jworld/suro4_1.jpg Quote Link to comment Share on other sites More sharing options...
neo2810 Posted March 20, 2011 Author Share Posted March 20, 2011 Once it's complete, I'll ask Stu if he'll list the parts used and the existing mods on the car right now. Quote Link to comment Share on other sites More sharing options...
neo2810 Posted March 20, 2011 Author Share Posted March 20, 2011 Also the std ECU doesn't learn, other than idle control, as it stays in closed loop until late in the RPM range, so it runs on the lambda feedback for most of the time and after that a fixed map with knock control. Interesting... Something has sorted itself out then. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2011 Share Posted March 20, 2011 Interesting... Something has sorted itself out then. I have heard of this problem before when fitting a tubular manifold, where abouts in the RPM/load range where you running rich? or was it from idle upto about 4-4.5K RPM? Quote Link to comment Share on other sites More sharing options...
neo2810 Posted March 20, 2011 Author Share Posted March 20, 2011 I have heard of this problem before when fitting a tubular manifold, where abouts in the RPM/load range where you running rich? or was it from idle upto about 4-4.5K RPM? It seemed to be idle to 4000. Quote Link to comment Share on other sites More sharing options...
supra steveo Posted March 20, 2011 Share Posted March 20, 2011 cool i still need to give thema ring to see if they can sort my HKS out Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2011 Share Posted March 20, 2011 It seemed to be idle to 4000. Guess its down to how the ECU behaves when it has to re adjust the idle/cruse via lambda feedback, it seems some are able to force more adjustment than others, and after having a quick squint at the manual yesterday, i think it might have something to do with the idle Co adjust screw/pot, i wonder if its used as a coarse limit control? Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted March 20, 2011 Share Posted March 20, 2011 Hey don't know much about the NA engines yet! But in the pic what's are thhe red horn shaped units? Newborn yes sorry Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2011 Share Posted March 20, 2011 Hey don't know much about the NA engines yet! But in the pic what's are thhe red horn shaped units? Newborn yes sorry Commonly known as velocity stacks, basically aids the airflow into the the throttle bodies. Quote Link to comment Share on other sites More sharing options...
Dazzi Posted March 20, 2011 Share Posted March 20, 2011 Interested. Was actually looking at BMW ITB's on ebay the other day after i saw the red ITB supra on youtube. Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted March 20, 2011 Share Posted March 20, 2011 I know they are for the 7M but these might be easy to fit - http://cgi.ebay.com/ebaymotors/ITB-Individual-Throttle-Bodies-6cyl-Supra-BMW-280Z-kit-_W0QQcmdZViewItemQQhashZitem53e6a95596QQitemZ360352142742QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories Quote Link to comment Share on other sites More sharing options...
Kirk Posted March 20, 2011 Share Posted March 20, 2011 Why does everyone think ITBs suddenly increase power so much Its ridiculous to think this even with an aftermarket ecu and manifold. Perfect example is the red one stateside. Its made 214hp and that's NOT at the wheels. You want 300hp out of an NA you better have deep pockets. Engine rebuild with higher CR, aggressive cams, lightweight internals, properly ported head etc etc. You will never see 300hp off TBs alone Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2011 Share Posted March 20, 2011 I think we have previously covered all this in another thread, but it will be interesting to see how close a professional tuner can get? Quote Link to comment Share on other sites More sharing options...
Kirk Posted March 20, 2011 Share Posted March 20, 2011 (edited) Bare in mind YSR are the only tuning company to hit over 300 mark on the NA but that was with a totaly rebuild engine with all custom made parts or so the spec list suggested on speedhunters and we all know how much custom engine parts can cost so for a exhaust company to state such things IMO is just silly. Edited March 20, 2011 by Kirk (see edit history) Quote Link to comment Share on other sites More sharing options...
skippyboyo1 Posted March 20, 2011 Share Posted March 20, 2011 hi mate...there throttle bodies.they get rid of the standard intake manifod. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2011 Share Posted March 20, 2011 hi mate...there throttle bodies.they get rid of the standard intake manifod. Err! did you actually read the opening post? Quote Link to comment Share on other sites More sharing options...
Nic Posted March 20, 2011 Share Posted March 20, 2011 Toda high compression (11.2:1) 2JZ-GE pistons Quote Link to comment Share on other sites More sharing options...
Kirk Posted March 20, 2011 Share Posted March 20, 2011 Thats where to start if you want a 300hp NA Quote Link to comment Share on other sites More sharing options...
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