JDM STi Blob eye & Classic engine differences
 

As above...?
I was wondering how the 2.0 engines and gearboxes differ between the JDM classic STi Type R and R/A and the JDM blob?
IIRC don't they both have forged internals from the factory? I know the classics have the short ratio 5 speed, but does the blob have the same ratios plus a 6th gear???
I drove a UK Blob and it was more 'refined' or should I say, a bit more civilised that the classic..
Any information from the gurus would be great.

I may be wrong (apologies if I am) but I'm pretty sure the v3 type r pistons weren't forged, not sure on the 4, 5 and 6. JDM blob pistons are hypereuretic, not forged. Although those engines always seem to do well with more power compared to the type r engines. As with every car you will always find someone who has run a lot of power through it perfectly fine, and someone that has blown one up with 300hp.

gearbox wise, as you know the type r boxes are very close, my v3 type r box was very close compared to the current UK 6 speed but great fun on the right roads. JDM 6 speed is closer than the UK 6 speed but from what I hear not quite as bad for daily work as the type r 5 speed. All depends what you use the car for.

I'm sure someone much more qualified than me will be able to expand or correct if I'm wrong!

Type R
5 speed 4.44 dccd
open deck 2.0 non avcs engine
Single scroll turbo

JDM blob
6 speed 3.9 ratio, some dccd some not
semi closed deck 2.0 avcs engine
Twinscroll turbo (depending on model)

Thats the basics that I know, someone more techy that can be bothered to answer may reply with more details.

Type-ra.com may also be of use, and google

You're comparing 2 completely different cars, in a LOT of ways

I found this:
http://www.gearhack.com/myink/ViewPa...ission%20Chart

It seems that the latest of the Classic R, R/A. 22B have the shortest gearing of all....I wonder what the difference would be to drive the JDM classic and JDM blob side by side and see if there's an appreciable difference..

TYPE R, R/A, 22B Ratios:
3.083/2.062/1.54/1.151/0.825

JDM STi blob:
3.636/2.375/1.761/1.346/1.062/0.842

Somebody, somewhere, sometime may somehow find this as interesting as me...

Is anybody interested in starting a Trainspotter group?? The LRM Sc/4527td (version 2, Gen 3) rolling stock are my favourite..(Not the E9-110 though..I'm not a fan of the noisy BREL manufactured splined couplings)..

Funky,

Not taking the pi$$ before this gets taken the wrong way! That sounds like something straight out of Shelton's mouth on "The Big Bang Theory"!!! As for the actual topic (as with all these things) getting a legit answer seems difficult at times. I know for a fact that my V7 Bug has forged pistons. Once upon a time I was lead to believe my MY03 JDM was on forged pistons but now I'm of the understanding they are not. I think we need "A confirmed as fact" in the tech section. Once something is "confirmed as fact" it gets highlighted and moved into that section so others can read up on at their leisure. I've read thousands of posts over the years (I'm sure others are in the 10s of thousands if not higher) and still you can still be left confused as to what is fact and what is fiction. Sorry to move off topic ever so slightly 😞.

Definitely be an appreciable difference. Type r is more old school lag then thump, JDM blob linear and I'd imagine quicker and more stable. Type r much more of a weekend car, if you can find a good one. In my experience 6 speed isn't as nice to use as the 5 speed but that's subject to personal opinion.

Correct...I've been all over the interwebs trying to find definitive answers to satisfy my anorak complex, but it's full of contradictions..Even when i speak to Subaru specialists...All of the forums have differing details..
Trying to get to the bottom of it is like trying to find a true Scotsman.

Interesting...I've never driven the 6 six speeder...The short ratio 5 speeder sounds more like my bag because I love rowing gears...
I would've thought that any old school lag would be negated somewhat by the shorter ratios(?)...
My BMW E46 M3 (up for sale) has the Getrag manual 6 speed box...On that the gearing is very tall....not my cup of tea..and 6th is more of an autobahn blaster cruising gear..

JDM six speed is still pretty close to be fair. All depends what you use the car for mainly. Barely use the type r on motorways so I liked the 5 speed. Only changed for a UK 6 speed due to being more reliable with more power.

Newer JDM STI (twin scroll) engines are considerably better than the previous generation EJ20's, and the cars are much more stable at higher speeds.
Gearboxes, whilst the 5 speed is preferred by some, the 6 speed jdm box is a nicer overall gearbox with better ratio's for all round driving.
Its also a much stronger box over the 5 speed but a fair bit heavier.

The classic con rods are not as good as the newage ones and of course the blocks are open deck.

only the JDM bug had forged pistons & single scroll turbo set-up with later 03> JDM STi's using hyperpeutic pistons & twin scroll turbo's.............

new-age UK 2.0 STi continued to use forged pistons

new-age STi gained the Semi closed deck block also

You mean bug? ;)

i do, try and engage brain first............edited above :thumb:

The RA ratios differ a little over the years (the early cars being the shortest geared) but generally speaking it's accurate enough to describe the RA box as equivalent to a JDM six-speed minus sixth gear.

I had two classic RAs before owning two JDM newages. The low ratios of the RA box do add to the car's sense of specialness but ultimately for me a sixth was needed, as I didn't enjoy driving everywhere at 6k+ rpms, and needed more top end speed.

The five-speed is also notoriously fragile whereas the six-speed is a pretty strong piece of kit.

I hated the v2 RA box in mine, far too frantic and only of use on the tightest twisty roads/tracks. Had a uk spec 5 speed after that and love the ratios hated the under steer.


I have a six speed from a wr1 in it now, lowish JDM ratios 1-4 and tall euro 5th & 6th.
Its a compromise that's acceptable albeit that 6th gear is really tall. I echo what others have said the six speed shift action is not as slick as the five.

I found the 5 speed notchier than the 6, mine did have the factory quick shift though ;)