are the supra and mr2 ct26's the same and what do you think of me using one for my 2.4L junkyard turbo project

 

My friend has one on his 2.4l KA and it is perfect sized. spools quickly(full boost by 4k) and I'm sure it would push 15+psi no problems.

 

does he have aim? id like to talk to hims, is that a datsun 510?

 

yeah, it's a 510.
"havok510"


Modified by RenoRacing at 6:57 PM 11/20/2003


Modified by RenoRacing at 6:58 PM 11/20/2003

 

The mkIII supra ct-26 and the mr2 ct-26 are NOT the same. I'm only familiar with the supra one since I own one, but I think the mr2 ones have a different exhaust housing and a smaller compressor. The supra one is probably a good size for a 2.4L engine with 4 valves/cyl, but probably a bit large for a 2 valve/cyl engine unless it is really built. In stock form it is slightly smaller than ideal for the 24 valve 3.0L supra engine with 230hp and 246lb-ft. It makes great midrange torque but starts to run out of breath on the top end. Also I wouldn't recommend using it for boost over 12 psi as they have some reliability problems with high boost.

 

The supra ct-26 is bigger than a mr2 ct-26. You can tell the difference because the mr2 turbo has 2 holes on the turbo flange and the supra ct-26 has one. I would say the supra ct-26 is comparable to a t-3 turbo off a 300z. On my old supra it was really being pushed too hard past about 11psi. It would probably be better suited to a big 4cly rather than a 3.0l 6cyl. The ct-26 on my old mr2 was garbage. It spooled fast but was very ineffective past 5500rpm, I would stay away from it if you want to make any real power on the top end.

 

mr2 version of the ct-26 also has nothing up top. perhaps a t3 of a turbo t-bird may work better?

 

what are the ct26's exact specs?

 

i used the one out of the supra on my LS and i like it. I have some specs on it but can't find them right now when i do i'll post it up.

 

 

spooln6 - have you ever dynoed your car?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phoenix GSR &raquo;</TD></TR><TR><TD CLASS="quote">spooln6 - have you ever dynoed your car? </TD></TR></TABLE>

 

Not yet i did go to the track and ran 13.9 @ 102.5mph( 6Psi ) that was on street tires. Still looking for those specs.

 

Sorry the only thing i could find was that it flows 437 cfm and the Exhaust is a
.50 AR

 

Supra CT26 = 300 hp, MR2 CT26 = 275. It's considered a very mild upgrade to stick the Supra compressor onto the MR2 CT26.

I was told the MR2 CT26, with split tang turbine, spooled right at 3K. No clue on the Supra CT26... but being compared to the .60/.63 T3 off the early 300ZX makes it sound promising. Flanges look to be T3, I saw both turbos for a period not to have exceeded 15 seconds each, so there may be minor/major variances in the flange.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RenoRacing &raquo;</TD></TR><TR><TD CLASS="quote">spools quickly(full boost by 4k)
</TD></TR></TABLE>

Full boost by 4k rpm on a 2.4 liter is QUICK!?!?!

I think NOT!

With a turbo that small, full boost below 2800 rpm on that motor would be quick.

 

so final verdicts?

 

supra ct26 is waaaayyyy bigger than my ford t3. Sad that people can get 300hp out of the ford t3, and 300 out of the ct26 when the ct26 is almost 50% larger

 

There are many different t-3's. I had a supra ct-26 and a t-3 off a 300z sitting in my shed and they are about the same size. The ct-26 is physically larger but the wheels on the inside are about the same. I don't think I have ever seen a mr2 make over 260whp with the STOCK ct-26, my old mr2 only made 213whp with the factory ct-26 with the wastegate unplugged, however it was fully spooled at 3200rpm in 3rd gear. A b series would make better #'s than a 3sgte and I wouldn't doubt you can get close to 300whp out of it but for that kind of power I would not use a ct-26. One nice thing you can do with a ct-26 is bore out the compressor housing and fit a t04 wheel in it. My friend with a supra turbo maxed out at 283whp on the stock ct-26. The power peaked at 4500rpm because the turbo could not flow enough air to sustain high boost on the top end. He then spent a few hundred dollars upgrading the compressor and gained nearly 100hp! I do know the highest horsepower supra on a upgraded ct-26 has 440whp so you can always upgrade later if it doesn't make enough power to start with.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by othick &raquo;</TD></TR><TR><TD CLASS="quote">my old mr2 only made 213whp with the factory ct-26 with the wastegate unplugged</TD></TR></TABLE>

That's why you only made 213 whp... run the wastegate and a boost controller, turn the boost down so the turbo isn't over spinning out of the efficiency range, and you'd have gotten a bit more than that.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by othick &raquo;</TD></TR><TR><TD CLASS="quote">I do know the highest horsepower supra on a upgraded ct-26 has 440whp so you can always upgrade later if it doesn't make enough power to start with</TD></TR></TABLE>

That wouldn't happen to be John Lunsford, would it? He lives near me.