HarleyFDMD Posted November 1, 2015 Share Posted November 1, 2015 As above^ Or will a greddy emanage ultimate be enough? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 1, 2015 Share Posted November 1, 2015 EMU will be fine to run another throttle body. Quote Link to comment Share on other sites More sharing options...
baldy Posted November 1, 2015 Share Posted November 1, 2015 Stock ecu will run a q45, i resently fitted 1 to rob trd's car and its perfect:) Quote Link to comment Share on other sites More sharing options...
HarleyFDMD Posted November 2, 2015 Author Share Posted November 2, 2015 Ahh brilliant cheers guys. I just wondered due to the throttle position sensor etc. It's for an na t build Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 2, 2015 Share Posted November 2, 2015 Stock ecu will run a q45, i resently fitted 1 to rob trd's car and its perfect:) I presume you mean by using the std TPS on the Q45 body? Quote Link to comment Share on other sites More sharing options...
Big Mark Posted November 2, 2015 Share Posted November 2, 2015 This is good to know too as I want to fit a Greddy manifold with a Q45 throttle and was fearing I'd have to replace OEM ECU. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 2, 2015 Share Posted November 2, 2015 (edited) I think I would disagree with the above, you are changing the MAP sensor figures substantially in relationship to a given throttle angle opening, and I would not be at all sure the stock mapping will happily cope with such big changes without falling back to some sort of safety map. I would take advice on a forum more specific to automotive ECU's. MOTEC, Syvecs, AEM, whatever, where the experts lurk. EDIT: I have just asked on the MOTEC forum, will copy any replies here, although as it's not a MOTEC specific question I doubt they'll bend over backwards to make a rapid reply. Edited November 2, 2015 by Chris Wilson (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 2, 2015 Share Posted November 2, 2015 If the TPS voltage remains std (using std TPS unit), I would expect there to be no problem as the throttle opening angle/voltage will remain the same, MAP can vary quite a lot in relation to throttle position due to air density and boost. But if its the Q45 TPS unit then its a different matter. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 2, 2015 Share Posted November 2, 2015 The Q45 throttle body I've used recently come with a universal adapter that allows you to use your stock TPS should you wish too (albeit needing minor mods to fit). Not that I'm an automotive engineer but it seemed to work on our 2jzge that used greddy emanage blue Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 2, 2015 Share Posted November 2, 2015 I am not qualified to say, but for sure there will be some on the MOTEC forum who are, if it piques their interest. I am sure the Syvecs engineers could say, too, of course. Not sure about AEM Quote Link to comment Share on other sites More sharing options...
baldy Posted November 2, 2015 Share Posted November 2, 2015 You need a tps adapter, a traction tps as the tps is turning the oposite direction and the wires need moving in the plug on the loom Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 2, 2015 Share Posted November 2, 2015 A post from a well respected expert: "I think it would be best to beat him around the head with that 10x excessively large TB for the power he will be making. I'd say it's bound to cause many issues unless he can re-tune the ecu." I have always said these big TB's give throttle modulation issues, that's why Mazda with the FD3 used a small butterfly for low air flow modulation, with a slightly bigger area pairing for wide open throttle on a gear and quadrant. I recall Jonny's last VVTi supra with a huge US TB being terrible to drive as cruise to mega power was a few millimetres of throttle pedal depression. Bigger is not always, or even often, better. Quote Link to comment Share on other sites More sharing options...
baldy Posted November 3, 2015 Share Posted November 3, 2015 I recall Jonny's last VVTi supra with a huge US TB being terrible to drive as cruise to mega power was a few millimetres of throttle pedal depression. Bigger is not always, or even often, better. i have heard this from a few members on larger throttle body on syvecs! trd robs car drives like stock on a side note the stock traction flap needs to be fully operational on an automatic as well for the transmission to function as it should Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 3, 2015 Share Posted November 3, 2015 Another reply on the MOTEC forum saying that it will require a remap. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 3, 2015 Share Posted November 3, 2015 (edited) Two sub £10 pressure gauges, one plumbed in before the TB, and one plumbed into a plenum tapping point, will show in minutes if you need a bigger TB. Just read the pressure drop across the stock TB. The ones I have checked, on even big power engines, suggest a bigger TB is not a worthwhile mod on 90% of modded 2JZ-GTE engines. And on those where one is required, and it is still used on the road, I would look at a dual body, with sequential operation, or one with a progressive throttle butterfly action, like on say a Porsche 928. Too big a TB and plenum can give the bizarre effect of the car going faster when you lift off the throttle slightly at some steady state cruise throttle openings. It's quite unnerving and shows airflow is in a right mess. Edited November 3, 2015 by Chris Wilson (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 3, 2015 Share Posted November 3, 2015 I see this question asked all the time on the Skyline forum, they all want to fit a lager TB despite only being tuned to 400bhp, the same goes for front facing plenum's, despite the flow/distribution characteristics vs the std plenum being far better with std Quote Link to comment Share on other sites More sharing options...
Wez Posted November 3, 2015 Share Posted November 3, 2015 If the sensor linearisation, ie throttle position to voltage output changes it should be re-calibrated / mapped to compensate. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 3, 2015 Share Posted November 3, 2015 That's exactly what I was saying .....just way more concisely put. Quote Link to comment Share on other sites More sharing options...
HarleyFDMD Posted November 5, 2015 Author Share Posted November 5, 2015 Just checked back at this! Thanks for all the help and advice chaps. Although I must admit some of the rather in-depth technical stuff does go over my head. My position is this: Na t, with a custom ffim (made to a very high standard) that has an oem throttle body compatible flange welded on. However I think the oem throttle body on a ffim will cause problems due to the throttle cable facing the wrong way? I figured using a q45 would be simpler and be better aesthetically, using a greddy tps adapter. I pressured it would also be better functionally too? Perhaps not? The car will be being mapped obviously going na t so that part won't be an issue Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 5, 2015 Share Posted November 5, 2015 I am presuming you mean a front facing plenum? which takes a std throttle body, but the cable is too short.... why not just get another longer cable, I believe an Celica ST205 is longer and will fit. IMO you would just be making yourself work by trying to fit the larger throttle body. Quote Link to comment Share on other sites More sharing options...
HarleyFDMD Posted November 5, 2015 Author Share Posted November 5, 2015 Yeah a front facing plenum. No my concern is not that the throttle cable won't reach, but that the throttle cable will be pulling from the wrong side of the throttle body. Hard to explain but if you think of an na manifold and throttle body the throttle cable is in front of the throttle body. So if I mount it onto a front facing plenum the throttle cable will have to loop round the edge of the engine bay and onto the front of the throttle body Quote Link to comment Share on other sites More sharing options...
HarleyFDMD Posted November 5, 2015 Author Share Posted November 5, 2015 You are right, I am creating work for myself for probably no gain atall. Infact I'm aware the standard manifold Will actually work better. Tbh I am doing this purely because it looks better (providing there are no huge complications or adverse effects) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted November 5, 2015 Share Posted November 5, 2015 If the TT throttle body will fit, that has a pulley to open the throttle so the cable can run from behind. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.