MATT RR Posted January 29, 2016 Share Posted January 29, 2016 Hey J, got any progress updates on the build, how are they getting on? been whatsapping you but remembered your phone is off being fixed Quote Link to comment Share on other sites More sharing options...
JackyBoi Posted January 29, 2016 Share Posted January 29, 2016 That looks awesome! what RPM roughly are you expecting full boost? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 29, 2016 Author Share Posted January 29, 2016 That looks awesome! what RPM roughly are you expecting full boost? It's very hard to say. Given its small size and billet wheel, i should fully expect it to outperform a gt35r, and they are generally on full boost by 3500rpm. In addition, my vvti should help a little too, though there are few reliable figures around as to how much difference it makes. As Nic said before, its not going to want to spool any faster. My main issue is going to be traction Quote Link to comment Share on other sites More sharing options...
JackyBoi Posted January 29, 2016 Share Posted January 29, 2016 It's very hard to say. Given its small size and billet wheel, i should fully expect it to outperform a gt35r, and they are generally on full boost by 3500rpm. In addition, my vvti should help a little too, though there are few reliable figures around as to how much difference it makes. As Nic said before, its not going to want to spool any faster. My main issue is going to be traction Wow, that's gonna be a real kick up the backside are you going for 295/35 rear tyres or something similar? I'm thinking about getting the Pilot Super Sports in a 295/35 on a 19" rim and I HOPE it's enough to maintain traction, although I've heard it's harder to get traction on a 19" than it is an 18" Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted January 29, 2016 Share Posted January 29, 2016 Ditch the 19's Jacky Quote Link to comment Share on other sites More sharing options...
Ian C Posted January 29, 2016 Share Posted January 29, 2016 As above It's rated to 600hp max, but to be honest I'm not interested in numbers, just how it drives. I should think it will be the fastest spooling Supra on the forum, or certainly not far off. I've had my eye on one of these for ages, as a downsize from a GT3582R. Theoretically, same power, but much faster spool. I'll be interested to see a boost curve plot from this Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 29, 2016 Author Share Posted January 29, 2016 im looking forward to the results myself. The only other supra i can find with this turbo is in Australia, but i think he's running it on the stock ecu Ill get whifbitz to supply a boostplot with the dyno printout Quote Link to comment Share on other sites More sharing options...
Style Posted January 29, 2016 Share Posted January 29, 2016 Would a quick spool valve aid things even further? Or will this thing be mental enough coming on boost as it is? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 29, 2016 Author Share Posted January 29, 2016 I dont know a lot about quick spool valves, but i assume you need an undivided manifold, and a divided turbine housing? I doubt it will need any help spooling though its hard to tell at the moment, but illI'll post up some pics of the engine bay when i get the car back showing the scale of the turbo. It's much smaller than most would go for. Quote Link to comment Share on other sites More sharing options...
johnny g Posted January 29, 2016 Share Posted January 29, 2016 Ditch the 19's Jacky This. In my experience, the Supra can be over-tyre'd as well as over-wheeled. 19s do not work with the Supra suspension, period. 18s at a push, 17s are perfect. 18s in my opinion are the best trade off between looks and function. For diameter, I tried many combinations on my car. On the front, I tried 235/40, 245/35 and 245/40, for the rears I tried 265/35, 275/35, 285/30. I didn't try each combination, but the one that I settled on was 245/40 and 265/35 on 18 wheels. I believe it had a nice, neutral balance. Traction seemed better over the 285, mainly I think due to the sidewall. That combination on a lightweight 18" wheel with Michelin Pilot Sport Cup 2s would be killer. Quote Link to comment Share on other sites More sharing options...
JackyBoi Posted January 29, 2016 Share Posted January 29, 2016 Ditch the 19's Jacky Can't do that, they look too good (and cost a lot) This. In my experience, the Supra can be over-tyre'd as well as over-wheeled. 19s do not work with the Supra suspension, period. 18s at a push, 17s are perfect. 18s in my opinion are the best trade off between looks and function. For diameter, I tried many combinations on my car. On the front, I tried 235/40, 245/35 and 245/40, for the rears I tried 265/35, 275/35, 285/30. I didn't try each combination, but the one that I settled on was 245/40 and 265/35 on 18 wheels. I believe it had a nice, neutral balance. Traction seemed better over the 285, mainly I think due to the sidewall. That combination on a lightweight 18" wheel with Michelin Pilot Sport Cup 2s would be killer. Does a larger width tyre cause a smaller sidewall then? Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted January 29, 2016 Author Share Posted January 29, 2016 Each width tyre has a range of different wheel widths they'll fit on. The wider the wheel, the more tyre stretch, and hence reduced sidewall. The smaller the tyre, the more feel you get, at the expense of ride and grip. Of course, thats only a rough guide. But these people who run loads of negative camber and stretched tyres ruin the way the car drives. Quote Link to comment Share on other sites More sharing options...
johnny g Posted January 29, 2016 Share Posted January 29, 2016 The Supra suspension is old design, and needs sidewall to work properly. Modern cars, by design, have less sidewall. Running too low a profile on the tyre works against the suspension and kills traction and grip. Chris Wilson will explain much better. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 4, 2016 Author Share Posted February 4, 2016 Small update, the turbo, intercooler pipe and intake etc are on, though we've decided against the BOV recirc as it looks messy. So it'll vent to atmosphere for now, see how I get on with it. The car is booked in for mapping next Thursday, so all being well I can pick it up by next weekend. Can't wait to get it back now Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted February 4, 2016 Share Posted February 4, 2016 Awesome mate. Enjoy it. Quote Link to comment Share on other sites More sharing options...
Pudsey Posted February 4, 2016 Share Posted February 4, 2016 Water and oil lines. Looking forward to the finished article, you might well need your spare gearbox after all. Quote Link to comment Share on other sites More sharing options...
Glanza_Mike Posted February 4, 2016 Share Posted February 4, 2016 Didn't realise you'd sent it off for the conversion already! awesome Looking forward to seeing your results and comments on it! Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 4, 2016 Author Share Posted February 4, 2016 Water and oil lines. What about them? Looking forward to the finished article, you might well need your spare gearbox after all. I hope not But worst case scenario, if I do break it, I'll fit the spare and get this one rebuilt with uprated parts. I'm not going to be ready for a different gearbox for quite a while yet Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 4, 2016 Author Share Posted February 4, 2016 Awesome mate. Enjoy it. Didn't realise you'd sent it off for the conversion already! awesome Looking forward to seeing your results and comments on it! Cheers guys Looking forward to getting it back just in time for spring (okay, late winter ) Quote Link to comment Share on other sites More sharing options...
Pudsey Posted February 4, 2016 Share Posted February 4, 2016 What about them? I hope not But worst case scenario, if I do break it, I'll fit the spare and get this one rebuilt with uprated parts. I'm not going to be ready for a different gearbox for quite a while yet You don't see water cooled ones used very often. I am hoping it lasts forever just fine, as it gives me another reason to talk myself into a conversion myself. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 4, 2016 Author Share Posted February 4, 2016 I gather the more commonly used Precision units are air/oil cooled? I don't know how much benefit it will be considering the sort of use the car will get, but I've had several Garrett turbos on various cars, and never had an issue with them. Quote Link to comment Share on other sites More sharing options...
Pudsey Posted February 4, 2016 Share Posted February 4, 2016 I gather the more commonly used Precision units are air/oil cooled? I don't know how much benefit it will be considering the sort of use the car will get, but I've had several Garrett turbos on various cars, and never had an issue with them. Yes same here, never personally had an issue either. Got to be better with both methods of cooling I'd only guess. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 4, 2016 Author Share Posted February 4, 2016 The only issue I know of is the heat of the turbo, manifold etc can be very hard on the flexi water pipes. I'll look at getting some hardpipes made up for the oil and water pipes, with small flexi sections further away, next year or the year after. It'll be much harder wearing, and will help achieve an OEM-ish finish. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 10, 2016 Author Share Posted February 10, 2016 Well, tomorrow is mapping day This is the first time I've had any of my Supras mapped, understandably I'm a little nervous. But the car couldn't be in better hands with Whifbitz and Romain from Syvecs, and the car was running perfectly, so hopefully it will be uneventful All being well, I'll collect her on either Friday or Saturday. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 10, 2016 Share Posted February 10, 2016 All the best! Keep us posted Quote Link to comment Share on other sites More sharing options...
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