j_jza80 Posted January 19, 2016 Author Share Posted January 19, 2016 Sorry, I will try and explain it clearly When you approach a corner, use the paddles to shift down the gears. When you are accelerating out of the corner, do not use the paddles to shift up the gears, allow the gearbox to shift up automatically Quote Link to comment Share on other sites More sharing options...
eival Posted January 19, 2016 Share Posted January 19, 2016 Oh okay ! I didnt know that the gearbox shift up automatically even in manual mode (never tried, that's why i didnt understand !) Thanks ! I can downshift hard mindfree now Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 19, 2016 Author Share Posted January 19, 2016 When it is in manual mode, it will only shift up gears when you are on full throttle and the revs get to the redline. which is perfect on the track. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 20, 2016 Author Share Posted January 20, 2016 (edited) Not much to report on the car, Whifbitz aren't being very forthcoming with pictures. (I'm not paying them to take pictures! ) But apparently, it was going well. From what I gather the stock turbos, manifolds, plenum etc came off without too much effort And then, trouble... The turbine housing I supplied them was proving impossible to fit. The casting of the large A/R, twin scroll housing was covering over the fittings and the retaining bolts. As you can see, not a lot of room for activities! So to get around this, I've ordered a single scroll, T4 housing with a 0.82AR housing from Owen Developments. Maybe not as ideal as a twin scroll, but it will still be a very quick spooling setup with plenty of top end power And, a theme throughout this build has been simplifying the turbo setup, making maintenance easier, which this will definitely help with. Edited January 20, 2016 by j_jza80 (see edit history) Quote Link to comment Share on other sites More sharing options...
JackyBoi Posted January 20, 2016 Share Posted January 20, 2016 Is it the twin scroll that caused it not to fit? You got me worried now! Quote Link to comment Share on other sites More sharing options...
Pudsey Posted January 20, 2016 Share Posted January 20, 2016 It's still quite unbelievable how much more simple it makes the engine bay with the removal of the oem turbos. Looking forward to the developments. What are you doing about the stock tiptronic gearbox, with regards to the increased power level? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 20, 2016 Author Share Posted January 20, 2016 Is it the twin scroll that caused it not to fit? You got me worried now! Yes, and no The GTX 5376R is a bit of a mongrel. Basically it uses a GT35R turbine wheel and housing, but a GTX3076R compressor. http://www.enginebasics.com/Advanced%20Engine%20Tuning/Garrett%20GTX3576R.html The core is quite small, and the larger GT35R rear end when combined with a large twin scroll housing overhangs the core quite a bit, leaving very little room. On most turbos, you wouldn't get this issue. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 20, 2016 Author Share Posted January 20, 2016 It's still quite unbelievable how much more simple it makes the engine bay with the removal of the oem turbos. Looking forward to the developments. What are you doing about the stock tiptronic gearbox, with regards to the increased power level? Yup no solenoids, vac lines or pressure tank to fail. Much easier for the DIYer to work on. Gearbox is completely stock, but with a Whifbitz transmission cooler kit. I'll see how it holds up, but I've got a spare tiptronic gearbox should the worst happen. If I brake one, then I'll start thinking about either having a box built, going manual, or go with either the Whifbitz DCT or SRD 8 speed auto upgrade. Quote Link to comment Share on other sites More sharing options...
Pudsey Posted January 20, 2016 Share Posted January 20, 2016 Great stuff, really looking forward to seeing what it turns out like. I am sure many will be thinking the same too. Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted January 21, 2016 Share Posted January 21, 2016 looks great, wish I had the $$ for this Quote Link to comment Share on other sites More sharing options...
Nic Posted January 21, 2016 Share Posted January 21, 2016 So to get around this, I've ordered a single scroll, T4 housing with a 0.82AR housing from Owen Developments. Maybe not as ideal as a twin scroll, but it will still be a very quick spooling setup with plenty of top end power And, a theme throughout this build has been simplifying the turbo setup, making maintenance easier, which this will definitely help with. I had the exact same turbo, HKS manifold and HKS wastegate, (although I ran a 4" downpipe, midpipe and vent to atmosphere wastegate), the only time I ever noticed any lag was from pulling away from a standstill in 1st gear, about the same amount you feel in a BPU j-spec TT. Once moving lag was virtually non-existent and the response from the turbo immediate, it spooled so quickly that for the first few weeks I was constantly hitting the 7200rpm rev limit in lower gears as I wasn't use to how fast it got there and how quickly I needed to change gear. I wouldn't be concerned about how responsive it will be, keeping the tyres gripping the road surface will be your only concern Quote Link to comment Share on other sites More sharing options...
Nic Posted January 21, 2016 Share Posted January 21, 2016 Yes, and no The GTX 5376R is a bit of a mongrel. Basically it uses a GT35R turbine wheel and housing, but a GTX3076R compressor. http://www.enginebasics.com/Advanced%20Engine%20Tuning/Garrett%20GTX3576R.html The core is quite small, and the larger GT35R rear end when combined with a large twin scroll housing overhangs the core quite a bit, leaving very little room. On most turbos, you wouldn't get this issue. Oh sorry I thought you'd gone with the GT3582R, sounds like it'll be even more responsive in that case! Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 21, 2016 Author Share Posted January 21, 2016 Oh sorry I thought you'd gone with the GT3582R, sounds like it'll be even more responsive in that case! From what I gather, it's supposed to give GT3582R power with almost GTX3076R spool. So it should be a little crazy one of the reasons why I went for Syvecs though, I thought the traction control might come in handy Quote Link to comment Share on other sites More sharing options...
Nic Posted January 21, 2016 Share Posted January 21, 2016 From what I gather, it's supposed to give GT3582R power with almost GTX3076R spool. So it should be a little crazy one of the reasons why I went for Syvecs though, I thought the traction control might come in handy Good choice getting the traction control my RLTC got a serious workout every time I floored it, it was almost laughable with the sound of the turbo spooling, pops and bangs from the RLTC and the screamer pipe doing it's thing, subtle it wasn't Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 21, 2016 Author Share Posted January 21, 2016 I wasn't brave enough for a screamer, infact I've even opted for a recirculating BOV as to make it more civilised Quote Link to comment Share on other sites More sharing options...
Nic Posted January 21, 2016 Share Posted January 21, 2016 I wasn't brave enough for a screamer, infact I've even opted for a recirculating BOV as to make it more civilised Good choice, that's the way I'd go if doing it again. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 21, 2016 Author Share Posted January 21, 2016 I never had dry traction issues with my old GT35 R car, but it was wearing 285 r888 tyres on the back, and had a TRD LSD. Although I'm having a TRD diff fitted, my rear tyres are currently 255/35 18. I can't got to 285 because of my 9.5 width rear wheels, so I'm going to try a 275 40 18 running at 28-30 psi instead. But they will be all weather tyres, R888s really aren't suitable for daily driving. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 21, 2016 Share Posted January 21, 2016 I'm on 295s on my 10" rims so I think 285s on 9.5s would be fine. The rim protection is excellent Quote Link to comment Share on other sites More sharing options...
eival Posted January 21, 2016 Share Posted January 21, 2016 Depends of your offset ! I have 275 on 9.5 ET35 and i had to roll arches. Perfect now but it has to ne known Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted January 21, 2016 Share Posted January 21, 2016 We need more pictures. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 21, 2016 Author Share Posted January 21, 2016 My rear arches are already rolled could you be a darling Scott and just post up a picture of the tyre sidewall on your car? My wheels are also ET35. Quote Link to comment Share on other sites More sharing options...
eival Posted January 21, 2016 Share Posted January 21, 2016 The more your offset is important the more the entire rim is deported to the exterior. Of course the fitting of the tyre doesn't change i agree with you, but the warning is about the fitting of the whole rim (+tyre) inside rear arches Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 21, 2016 Author Share Posted January 21, 2016 (edited) Yes, my rear wheels do not stick out of the wheel arches, and the lip of the wheelarches has been rolled back, so I think there will be a lot of room for larger tyres Edited January 21, 2016 by j_jza80 (see edit history) Quote Link to comment Share on other sites More sharing options...
Scott Posted January 21, 2016 Share Posted January 21, 2016 Rim width plays no part in whether it scrubs or not. Its all down to tyre width and offset. If your last wheels were a similar offset (+35) then this fitment will be exactly the same. Will sort you out a pic now bud. Quote Link to comment Share on other sites More sharing options...
Andrew K Posted January 21, 2016 Share Posted January 21, 2016 Looking good mate and it's starting to come together Quote Link to comment Share on other sites More sharing options...
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