mikeyh Posted August 11, 2005 Share Posted August 11, 2005 can any one tell me the difference between uk spec turbos and j spec? are they bigger? are they stronger? can they just be swopped like for like or is there anything i would have to change? Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 J spec turbo's are ceramic and slightly smaller. Uk turbo's are steel and, well, bigger.! J specs cant really handle over 1.2 ish bar. The ceramic blades shatter. Can be swapped straight over i believe. However, uk engines ran 540cc injectors too, so putting uk turbs on j spec, you would need to upgrade fueling. Quote Link to comment Share on other sites More sharing options...
Kopite Posted August 11, 2005 Share Posted August 11, 2005 i thought you wouldn't be alble to fit UK turbos on the Jspec manifold? Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Manifold is the same chap. Seen this done as just a straight swap. Quote Link to comment Share on other sites More sharing options...
mikeyh Posted August 11, 2005 Author Share Posted August 11, 2005 J spec turbo's are ceramic and slightly smaller. Uk turbo's are steel and, well, bigger.! J specs cant really handle over 1.2 ish bar. The ceramic blades shatter. Can be swapped straight over i believe. However, uk engines ran 540cc injectors too, so putting uk turbs on j spec, you would need to upgrade fueling. i have uprated fuel pump but not injectors will they need upgrading to handle the uk turbos? Quote Link to comment Share on other sites More sharing options...
Homer Posted August 11, 2005 Share Posted August 11, 2005 J spec turbo's are ceramic and slightly smaller. Uk turbo's are steel and, well, bigger.! J specs cant really handle over 1.2 ish bar. The ceramic blades shatter. Can be swapped straight over i believe. However, uk engines ran 540cc injectors too, so putting uk turbs on j spec, you would need to upgrade fueling. That’s not quite right mate: thought the UK are steel and the Jap ones ceramic, the jspec is bigger diameter wise than the UK Spec. The UK has a larger scroll area so can provide more power (therefore has slightly more lag). At least thats what I understand from the experts here. Branners made a post with pictures of the turbines side by side, but I can't find the thread now. Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Its probably worth doing. May run a little lean using the standard 430cc injectors. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 11, 2005 Share Posted August 11, 2005 Branners made a post with pictures of the turbines side by side, but I can't find the thread now. Here you go mate Quote Link to comment Share on other sites More sharing options...
Homer Posted August 11, 2005 Share Posted August 11, 2005 i have uprated fuel pump but not injectors will they need upgrading to handle the uk turbos? Mikey, you cannot do a straight swap with UK turbo's into a Jap car, you will need the UK manifold and many other ancillary parts. Cost wise its not worthwhile at all. Quote Link to comment Share on other sites More sharing options...
Homer Posted August 11, 2005 Share Posted August 11, 2005 Cheers Jake, thats the one Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Homer, read branners thread more carefully!! Quote Link to comment Share on other sites More sharing options...
mikeyh Posted August 11, 2005 Author Share Posted August 11, 2005 thanks guys nearly brought somthing i wouldnt beable to use Quote Link to comment Share on other sites More sharing options...
Jake Posted August 11, 2005 Share Posted August 11, 2005 I wouldn't put UK spec turbos on my car as a gift, I love my ceramics. I like my turbos to be fast spooling thanks. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 11, 2005 Share Posted August 11, 2005 Homer, read branners thread more carefully!! Jez, I had a quick scan through that thread and I can't see where it says you can fit UK turbos to a Jcar. Can you point it out please? Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Correct about manifolds, just had a look. Cant say i've ever driven a uk car. Is there really that much difference?? Quote Link to comment Share on other sites More sharing options...
Kopite Posted August 11, 2005 Share Posted August 11, 2005 Yep, mine's slooow Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 It didnt say it in that thread. I was just pointing out the bigger uk turbine blades. I was going on past experience on selling a set of uk turbs for a jap car. I must have sold the manifolds with it, cos i cant find them! Quote Link to comment Share on other sites More sharing options...
ardasaliah Posted August 11, 2005 Share Posted August 11, 2005 That’s not quite right mate: thought the UK are steel and the Jap ones ceramic, the jspec is bigger diameter wise than the UK Spec. The UK has a larger scroll area so can provide more power (therefore has slightly more lag). At least thats what I understand from the experts here. Branners made a post with pictures of the turbines side by side, but I can't find the thread now. On the first picture UK is on the right, so they are bigger and Quote Link to comment Share on other sites More sharing options...
heckler Posted August 11, 2005 Share Posted August 11, 2005 It didnt say it in that thread. I was just pointing out the bigger uk turbine blades. I was going on past experience on selling a set of uk turbs for a jap car. I must have sold the manifolds with it, cos i cant find them! dont for get, the down pipe is also different... has different flange to join to first cat too Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Quote Link to comment Share on other sites More sharing options...
Homer Posted August 11, 2005 Share Posted August 11, 2005 Correct about manifolds, just had a look. Cant say i've ever driven a uk car. Is there really that much difference?? Re-read branners post, sorry I got that wrong. Somehow for the last 18 months I thought the first post was correct. Branners, please edit you post mate!! Yes. Jspec spools up faster with slightly lower peak power, UK spec has higher peak power but is noticeably slower to spool. For a day to day driver I would the have the Jspec.... especially with the decat and the almost instant spool time. Quote Link to comment Share on other sites More sharing options...
Kopite Posted August 11, 2005 Share Posted August 11, 2005 The higher peak powers probably about 10 bhp too! j-specs a more exciting drive, i got a UK for insurance reasons and because i planned on going single etc anyway, plus i don't mind turbo lag that much Quote Link to comment Share on other sites More sharing options...
Jake Posted August 11, 2005 Share Posted August 11, 2005 On the first picture UK is on the right, so they are bigger and No mate. In all the pics the white coloured one is the ceramic Quote Link to comment Share on other sites More sharing options...
Jezz Posted August 11, 2005 Share Posted August 11, 2005 Do they boost the same pressures homer? And whats spool up rpm? Quote Link to comment Share on other sites More sharing options...
carl0s Posted August 11, 2005 Share Posted August 11, 2005 Well the yanks do rather well with their UK-spec cars, don't you think? and mine's fast enough! for now.. I think I'm going to have to race someone who has a BPU J-Spec. Anyone nearby? No corners please Quote Link to comment Share on other sites More sharing options...
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