Steviegeeza Posted January 3, 2008 Share Posted January 3, 2008 Just bought some UK turbos what do I need to fit them on my J-spec. Is it just the uk exhaust manifold or do I need loads of plumbing ? Anyone done this? The ceramic turbos have been ok at 1.2bar but I want to push it a bit further. I already have the cats out, a walbro pump and a boost controller ( not really needed as the waste gate on the first turbo can't keep it below 1.2bar) . I'm going to fit 550cc injectors and an e-manage blue to tweak the fueling. How far can I go with UK turbos will they do 1.35bar or do they run out of puff at 1.3 what BHP can I hope to get ? I did think about going single but a big laggy turbo in an auto car not so sure! Thanking you in anticipation Steve Link to comment Share on other sites More sharing options...
gaz1 Posted January 3, 2008 Share Posted January 3, 2008 with that setup anything between 400-450 i would imagine, but if you have that urge for more power, start saving;) Link to comment Share on other sites More sharing options...
gaz1 Posted January 3, 2008 Share Posted January 3, 2008 i think the only diffrence would be apart from manifold is the down pipe size, uk 3" and jspec 2 and three quarters i think Link to comment Share on other sites More sharing options...
Steviegeeza Posted January 3, 2008 Author Share Posted January 3, 2008 Does that mean that the exhaust pipework out of the turbos with the exhaust control valve is different? If I can get 450 bhp at the crank I'll be well chuffed Link to comment Share on other sites More sharing options...
superstar dj Posted January 3, 2008 Share Posted January 3, 2008 I'VE GOT A DECAT PIPE FOR UK SPEC TURBOS IF YOUR LOOKING FOR ONE MATE, Cheap as chips too!!!! Link to comment Share on other sites More sharing options...
Kev.O Posted January 3, 2008 Share Posted January 3, 2008 I *think* I still have my old UK manifold with a hole for the EGT in the garage if you're interested Link to comment Share on other sites More sharing options...
Nic Posted January 3, 2008 Share Posted January 3, 2008 not really needed as the waste gate on the first turbo can't keep it below 1.2bar You'll need the boost controller with the UK spec turbos fitted. Link to comment Share on other sites More sharing options...
bodilx6 Posted January 3, 2008 Share Posted January 3, 2008 And probably a FMIC of decent quality and size as well as proper ducting for it. To my recollection I've read a very descriptive post on supraforums.com regarding the US spec needing further inter cooling of you expect any performance gain above 1.2 bar... Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 3, 2008 Share Posted January 3, 2008 Why don't you get them hybridised, that way you would be more likely to make 450bhp, but you will probably need cams as well. Link to comment Share on other sites More sharing options...
Inferno Posted January 3, 2008 Share Posted January 3, 2008 Hiya Steve, You will need the UK exhaust manifold, UK turbos, and all the cast components after the turbos (Y pipe and EGCV)... plus the gaskets to keep these together. You will then need to modify the flange on your dump pipe so it can mate to the UK flange. Any exhuast shop should be able to do this. Note - you dont need any of the UK intake pipes as they are the same as the JDM ones. Link to comment Share on other sites More sharing options...
Steviegeeza Posted January 4, 2008 Author Share Posted January 4, 2008 Thanks for that chaps So it looks like I need the exhaust pipe work either side of the turbos i.e the manifold and the Y pipe with the exhaust control valve (to accomodate the larger 1st turbo waste gate i suppose). I'm not sure about the actuators I would imagine they are common. I already have a new miami gt SMIC ready to fit, I'll see how that works - most Americans have warmer weather than us. Steve Link to comment Share on other sites More sharing options...
Matt Harwood Posted January 4, 2008 Share Posted January 4, 2008 I'm suprised no-one else has mentioned this, but, are you aware that all this hassle you're going to will give you slightly laggier turbo response and maybe, just maybe, a little more power at the top end. Safer, maybe, due to the 550's, but these would do the same job with the ceramic turbos. And yes, the steel turbos 'might' be slightly stronger at prolonged higher boost, but at anything more than 1.2 bar, they're still well out of their operating efficiency. Lots and lots of hassle for very little gain IMHO. Sorry if I'm urinating on your bonfire Link to comment Share on other sites More sharing options...
Nic Posted January 4, 2008 Share Posted January 4, 2008 I'm suprised no-one else has mentioned this, but, are you aware that all this hassle you're going to will give you slightly laggier turbo response and maybe, just maybe, a little more power at the top end. Safer, maybe, due to the 550's, but these would do the same job with the ceramic turbos. And yes, the steel turbos 'might' be slightly stronger at prolonged higher boost, but at anything more than 1.2 bar, they're still well out of their operating efficiency. Lots and lots of hassle for very little gain IMHO. Sorry if I'm urinating on your bonfire Agree Matt, I had the same thoughts when I read the thread, I've had the same discussion on the Australian forum, where swapping to the US spec turbos is very popular. I could perhaps understand it if the J-spec turbos had blown, but replacing perfectly good J-spec turbos with UK turbos just doesn't make sense to me. Link to comment Share on other sites More sharing options...
Steviegeeza Posted January 9, 2008 Author Share Posted January 9, 2008 Didnt buy the UK spec Turbos in the end as the guy selling said he had the exhaust parts but didn't ( pants on fire ?) He's put them up again along with some J-spec ones and other bits. Might be of interest to someone with a uk car with dead or dying turbos! http://cgi.ebay.co.uk/Toyota-Supra-j-spec-SPEC-Turbos-2JZ-GTE-JZA80_W0QQitemZ120207914568QQ I still think I might try the uk turbos at 1.3bar with good cold air induction and a monster intercooler, I think keeping the charge air temp would be key to pushing them to the limits of their efficiency. It's probably the cheapest thing to try next and I'm a bit of a tight arse! Anyone gone single and got a set of UK turbo's c/w manifold Ypipe Decat etc they want to sell? Live Long and Prosper Steve Link to comment Share on other sites More sharing options...
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