Ct20a's on a 1JZ?
- Thread starter ill Z
- Start date
CT20, as in Aristo twins?
You'll need a custom y-pipe, as well as a way to wastegate the 2nd turbo.
You'll need a custom y-pipe, as well as a way to wastegate the 2nd turbo.
ill Z said:
They are JDM (Toyota Aristo). They are the same as the GS300 over here, but with the 2jzgte.
yup, CT20a's are also ceramic wheel
but you would have to make the y-pipe and wastegate the 2nd turbo like mentioned already
but you would have to make the y-pipe and wastegate the 2nd turbo like mentioned already
ill Z said:
A friend of mine did this, he used two front turbo's of a jdm 2jz to work around the wastegate problem. They are also 3 bolt flanges and fit with little alteration. However you do need a custom Y-pipe and the other downside is the ceramic impellors of the turbo's, they don't like high boost.
My friend also has a 1.5jz and he made 345whp @ 14psi it has worked for over three years now and looks to be quite foolproof.
But I doubt it will be possible to get 400whp reliable from a 2.5ltr, I think it will put too much stress on the turbo's as you need to up the boost to about 18-20psi to get to that power level and eventually they will break up.
If all you want is 400rwhp, then go with a gt35.... I have it on my 240sx with a 1j and it comes on very quick and the top end it very nice too.
Got a friend with a GT35R in his Evo, stroked to 2.3 dyno'd 422awhp(19psi). Kinda hoping to kick his @ss on a highway pull(one day). His car lags through first gear and somewhat in second, even with the stroker, it's still a four banger. The GT35R crossed my mind because I am curious to see how it responds on a straight 6. I'm not a fan of lag, hence my desire to tune the CT20's. The GT35R would proove to be more reliable though in the long run of things.
I made 315whp@12psi, on a 1JZ with stock twins.........Rich said:
My 1JZ GT40 made 400whp@15psi, but it lagged a LOT
annoyingrob said:
I made 322whp@14psi on a 1jz with stock twins........ :biglaugh:
(Rob, now watch the pissing contest start, LOL!)
I dont think you'd need to do anything custom with the rear turbo.. Iirc the front and rear wastegates have the same spring, so its fine
The rear turbo doesn't have a wastegate. Because the two manifolds are connected together, the 2nd turbo can also be controlled via the wastegate on the first turbo.tissimo said:
What the second turbo has on it, looks like a wastegate, but it's the pre-spool valve. It opens allowing a little exhaust to flow out, spinning the turbo up before the actual large exhaust valve opens.
well, there was a reason he used two fronts, maybe it was bolt pattern, I don't recall, it is about 4 years ago now
his username is youp, both here as on sf, if you search on that you will find the thread
his username is youp, both here as on sf, if you search on that you will find the thread
yep me..
We used two 2jz front turbos (turbine), as they both have wastegates (the rear turbo has a spoolup port, which can be converted to a wastegate by some drilling and installing a bushing).
for the compressor side we used the normal front and back
The custom Y pipe is a lot of work.
in the turbo are some pins for allignment, just remove them and you can turn both sides of the turbo to your liking...
We used two 2jz front turbos (turbine), as they both have wastegates (the rear turbo has a spoolup port, which can be converted to a wastegate by some drilling and installing a bushing).
for the compressor side we used the normal front and back
The custom Y pipe is a lot of work.
in the turbo are some pins for allignment, just remove them and you can turn both sides of the turbo to your liking...
I just told you why he would have used two frontsRich said:
I guess we sort of posted those at the same time, and you missed mine,