Roamer Posted February 10, 2005 Share Posted February 10, 2005 I have looked at a number of threads on these forums and have a sense of some of the differences between the USDM LGT and the JDM LGT Spec. B. Given the outstanding reviews of the Spec B, I would like to gradually, to the greatest extent practicable, upgrade an LGT to Spec B. standards. From what I can gather there are the following differences: 1. JDM uses 2.0 liter, vs. 2.5 for the USDM. 2. JDM has a 6-speed tranny (similar to WRX STi tranny?) vs. USDM 5-speed. 3. JDM Spec B has upgraded springs, shocks, sway bars and control arms(?). 4. JDM Spec B uses the shorter rear tail and slightly different front nose. 5. JDM Spec B uses the Brembo caliper and rotors from the 2004 WRX STi. 6. JDM Spec B uses 18" wheels and tires, USDM 17's. Other than some trim differences (and obviously RHD vs. LHD), is there anything else? Ideally I would like to dynamically re-create the Spec B using the LGT as a base. Certainly changing the engine and tranny are out of the question (unless of course the tranny is an easy swap, which I doubt), but re-creating the suspension and braking should be feasable at a reasonable cost. Further details on the differences would be appreciated as would your suggestions on how to build a US-spec B. Thanks! Link to comment Share on other sites More sharing options...
SC GT Posted February 10, 2005 Share Posted February 10, 2005 I don't think the Spec B gets Brembos. I think they get the same brakes as us. The Spec B (and the JDM GT) has a twin scroll turbo. That can be changed out so that you have a twin scroll on your 2.5. You can open up a huge can of worms just pointing out the differences between USDM vs. JDM (McIntosh stereo option, rear window wiper, etc.), but I think you've pointed out the main things you'd need to make a USDM GT close to a JDM Spec B. Link to comment Share on other sites More sharing options...
Drift Monkey Posted February 10, 2005 Share Posted February 10, 2005 I have looked at a number of threads on these forums and have a sense of some of the differences between the USDM LGT and the JDM LGT Spec. B. Given the outstanding reviews of the Spec B, I would like to gradually, to the greatest extent practicable, upgrade an LGT to Spec B. standards. From what I can gather there are the following differences: 1. JDM uses 2.0 liter, vs. 2.5 for the USDM. 2. JDM has a 6-speed tranny (similar to WRX STi tranny?) vs. USDM 5-speed. 3. JDM Spec B has upgraded springs, shocks, sway bars and control arms(?). 4. JDM Spec B uses the shorter rear tail and slightly different front nose. 5. JDM Spec B uses the Brembo caliper and rotors from the 2004 WRX STi. 6. JDM Spec B uses 18" wheels and tires, USDM 17's. Other than some trim differences (and obviously RHD vs. LHD), is there anything else? Ideally I would like to dynamically re-create the Spec B using the LGT as a base. Certainly changing the engine and tranny are out of the question (unless of course the tranny is an easy swap, which I doubt), but re-creating the suspension and braking should be feasable at a reasonable cost. Further details on the differences would be appreciated as would your suggestions on how to build a US-spec B. Thanks! The JDM one uses a 5sp just like ours less the shorter final drive. I don't think the JDM spec B got brembos. Link to comment Share on other sites More sharing options...
SC GT Posted February 10, 2005 Share Posted February 10, 2005 DM's right. I think only the WRC version got the 6MT. Link to comment Share on other sites More sharing options...
kanoswrx Posted February 10, 2005 Share Posted February 10, 2005 1. Correct 2. Spec B has a 5 Speed like ours. 3. Spec B has Bilstien Struts and Springs, bigger sway bars 21mm and 19mm, Aluminum Front control arms. 4. Spec B has a different bumpers front and back, although the back bumper is the same as every other Legacy GT in japan. 5. Same brakes. 6. Spec B has 18x7 wheels. The WRB legacy that lots of people have seen pictures of is actually just a concept type car, its really call the WR Version not WRC. It sports a lot more STI parts, probably what a STI legacy would look like if it existed. Link to comment Share on other sites More sharing options...
Komeng Posted February 11, 2005 Share Posted February 11, 2005 1. JDM uses 2.0 liter, vs. 2.5 for the USDM. 2. JDM has a 6-speed tranny (similar to WRX STi tranny?) vs. USDM 5-speed. 3. JDM Spec B has upgraded springs, shocks, sway bars and control arms(?). 4. JDM Spec B uses the shorter rear tail and slightly different front nose. 5. JDM Spec B uses the Brembo caliper and rotors from the 2004 WRX STi. 6. JDM Spec B uses 18" wheels and tires, USDM 17's. 1 - correct. 5MT gets the STi 280ps, while 5EAT gets a detuned 260ps version 2 - incorrect. its 5MT or 5EAT. 3 - correct. uses Bilsteins painted in yellow. 4 - correct. 5 - incorrect. 6 - correct. 215/40R18 RE050A riding on 18"7J. additionally, - twinscroll titanium turbo - double AVCS - HID lowbeams - optitron meters - electric-foldable side mirrors - metal load sill guards, door sill guards (4 doors), pedals and footrest (drilled) - electric rear seat release - head unit with MD player - height adjustable lowbeams - in-dash cubbyhole opens upwards, dampened (Liberty's drop theirs downwards) - ceiling sunglass cubbyhole - patterned aluminum interior trim ok, if you need pics, check this out: http://legacygt.com/forums/showthread.php?t=4005&highlight=spec Holy Spec B Link to comment Share on other sites More sharing options...
Roamer Posted February 11, 2005 Author Share Posted February 11, 2005 Sorry guys, I was confused between the two sportcompact articles, one on the S401 and another on the Spec B. Just for reference: http://www.sportcompactcarweb.com/features/0406scc_tengreat09/ http://www.sportcompactcarweb.com/roadtests/0306scc_legacy/ Despite my confusion, what about creating a Spec B/STi like car out of the USDM LGT? I know that hp upgrades have been developed and more are coming to get hp over 300 fwhp. There seem to be a variety of suspension options out there and wheel and tire options are starting to expand. The stock brakes are pretty darn good, but I would love to have the STI (2004) brembos peeking through. Ultimately what I am looking for is something along the lines of creating an STI, but not quite as harsh, think M3/S4, highly capable but something you could drive to work everyday. Give me your thoughts on how you would go about building her. Link to comment Share on other sites More sharing options...
type b Posted February 11, 2005 Share Posted February 11, 2005 Don't forget the JDM has a lighter block so you'll need additional changes to make the USDM handle and stop in the same way Link to comment Share on other sites More sharing options...
rc0032 Posted February 11, 2005 Share Posted February 11, 2005 Ultimately what I am looking for is something along the lines of creating an STI, but not quite as harsh, think M3/S4, highly capable but something you could drive to work everyday. Give me your thoughts on how you would go about building her.You and 93% of the board Link to comment Share on other sites More sharing options...
Roamer Posted February 11, 2005 Author Share Posted February 11, 2005 You and 93% of the board That's exactly why I was hoping that people might have some thoughts on how to get there! Link to comment Share on other sites More sharing options...
rc0032 Posted February 11, 2005 Share Posted February 11, 2005 That's exactly why I was hoping that people might have some thoughts on how to get there!The current movements are new exhaust systems and engine management. Combine this with a few other goodies (Perrins TMIC, pulleys, turbo inlet hose, etc.) and you will be close if not over 300/300. I would suggest reading over the Turbo Powertrain forum. Also read over the suspension forum. So what im getting at is search, read and observe Link to comment Share on other sites More sharing options...
Roamer Posted February 11, 2005 Author Share Posted February 11, 2005 Well, I have, but everything seems quite scattered, I was trying to get some consenscious, which is why I posted the question. Link to comment Share on other sites More sharing options...
PGT Posted February 11, 2005 Share Posted February 11, 2005 The WRB legacy that lots of people have seen pictures of is actually just a concept type car, its really call the WR Version not WRC. It sports a lot more STI parts, probably what a STI legacy would look like if it existed. Actually, they were the 'WR Edition' cars for '05 with WRB paint, 18" Spec B wheels and Blue escaine seats, plus other goodies. EDIT for link: http://www.subaru.co.jp/legacy/wrlimited Link to comment Share on other sites More sharing options...
Drift Monkey Posted February 11, 2005 Share Posted February 11, 2005 Oh, and in addition to the comments I made above, the JDM car gets better brake pads that provide better initial bite....but that's an easy fix. Link to comment Share on other sites More sharing options...
red beast Posted February 11, 2005 Share Posted February 11, 2005 well. i inquired about new subie spec b 3.0r 18x7 rims each with shipping $600. then ya got to buy the tires maybe a little lower with haggling Link to comment Share on other sites More sharing options...
PPower Posted February 12, 2005 Share Posted February 12, 2005 Don't forget the Spec B gets a 4.444 final drive compared to our 4.111. Putting a twinscroll on the 2.5 is a lot better than a 2.0 w/ 4.444 final. Did somebody mention the different bumper? Link to comment Share on other sites More sharing options...
apexjapan2 Posted February 12, 2005 Share Posted February 12, 2005 Something that is outta sight, the sus links - lots of forged aluminium suspension bits on the JDM. Front lower arm and two bits in rear. Altogether they lighten the unsprung weight a bit (actually quite a lot in relative terms IIRC), therefore helping the struts do their job better. Check the story on apexjapan.com - a fair bit of detail covered in that I think (but I would say that, wouldn't I? ). HTH Link to comment Share on other sites More sharing options...
Komeng Posted February 12, 2005 Share Posted February 12, 2005 such a feel good thread this is...mmm Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.