ej20t info

[wagonofdoom]

Ok, so im sure it is somewhere, but i cant seem to find it.

what ist he us equivalent for parts, and tuning info purposes to the JDM Legacy EJ20t.

I want to do a few things, but just want to check my thoughts against it.

Is like a wrx the same or whatever?

[Reuben]

Hmmm? don't quite understand the question...


Are you asking what parts you can get for it to make it fast?

The TT engines are limited in their potential for various reasons, but that doesn't stop you trying, and people have gotten power out of them. May i ask what engine has the new GTB got? is it an EJ20H, or EJ20R?

[wagonofdoom]

pretty much

i just want to swap a turbo with the primary that will give me a longer time in boost....or do i need to change something else?

It gets annoying when the first turbo kicks in, completely drops off, then the second one initiates.

its a stupid design.

[Sarra]

It's sequential, and there's no getting around the valley of death without converting to a single turbo.

[Reuben]

pretty much

i just want to swap a turbo with the primary that will give me a longer time in boost....or do i need to change something else?

It gets annoying when the first turbo kicks in, completely drops off, then the second one initiates.

its a stupid design.

That was exactly what i wanted to hear, you, sir, need a single turbo conversion!

That's why i asked if it was a 20H or 20R. The EJ20R has the benifit of being 100% compatible with V3/4 STi parts - making the conversion VERY easy, and pretty cheap too. The 20H requires you get aftermarket injectors and ECU, and will need to do some pin swapping to get the ECU in most likely.

Have a read of the intro to my single conversion thread:

http://clubsub.org.nz/forums/index.php? ... #msg252480 (http://clubsub.org.nz/forums/index.php?topic=24206.msg252480#msg252480)



First up, a run down on Subaru's sequential twin turbo. We can only assume why Subaru decided to put a TT system in the legacy's... The commonly accept explanation is that the sequential setup allows lots of low down torque, and high end power, perfect for a big ol' wagon that should see lots of towing and open road driving. On paper the idea is great, but making it work in reality is another matter. You may have heard some terms on the forums such as VoD (Valley of Death) and BBoD (Black Box of Doom). The VoD is the gap between both turbo's in which neither are working, basically de-spooling the primary, then spooling both the primary and secondary at once. Simply put, there's nothing you can do to really fix it, other than totally avoid it - which is hard considering it occurs right between 4000rpm, and 4500-5000rpm ish. There are things you can buy to lessen the blow, such as the Z/S Sequential controller, info on that in the main legacy forum sticky. And then there's the BBoD, a mess of solenoids and vac lines. I don't even want to go there... And you won't either should anything with the TT system go wrong on you. I should note that the sequential TT works quite well in auto's, in my honest opinion. They auto seems to manage VoD quite well - but it's an auto - nuf said...

So what is the a single conversion, and why do it? Well basically, we take off the two turbo's, and stick only one big one back on in place, using STi or WRX parts, thus eliminating VoD and greatly improving the drivability of your car. If you don't believe me, take your mates STi for a spin, you'll be sold. The upshot of the single conversion, is that you're left with an STi engine bay - meaning that you now have a wide array of aftermarket parts for to make it go fast. The big one here being the ECU, most tuners won't touch a legacy TT, but pretty much all will do an STi :D Then there's the headers, up-pipes, and turbo back exhausts now that bolt right in. Aftermarket FMIC's with pre-made piping, and even aftermarket turbo's!

[wagonofdoom]

how do i find out if its a 20h or 20r?

let me search a little bit

YOUR A FANTASTIC HELP.
single turbo sounds like a rather good idea. this thing has the makings of a wangan car lol

[wagonofdoom]

conversion looks like it could be some fun, nothign too crazy

[Reuben]

I made a little shopping list of STi parts to get from wreckers for it, if you get everything on that list, the conversion can be done in a day, or over the weekend, depending on how much fuss the twins put up (it took a weekend just for us to get the engine out, they were that painful - another reason single turbo is better :D)

Take a look in the enine bay, and on the passenger side strut tower will be a plaque with all the info you need. Engine number and applied model number is what you're after.

[wagonofdoom]

fantastic,


if i do do this, its gonna be a few months. its plenty fast for the wife.

[Reuben]

Well the change is only in power delivery, i dyno'd 240 HP at the wheels, which is maybe 10-20 over stock. That was because i used a VF39, and was at 20 psi, stock being closer to 15psi. The conversion simply improves the drivability, and potential for future mods, the (manual) GTB's already make STi power!