first off: i would like to say hello to everyone because im new here but not new to anything toyota related and i just got this car.

second: i come way from the supramania.com and supraforums.com community and i still own an mk3 supra turbo.

ok, i searched all the topics related to the ct26 turbo on this forum site and most of the information i am finding is way old or simply untrue. i have been reading how the ct26 cant flow or how the spool characteristics just plain suck.

some facts: the toyota ct26 originates from (mainly)the mk3 supra turbo(3.0l-7mgte) and also the 3sgte mr2. the supra ct has a single wg door while the 3s ct has a dual wg door.(just to clear it up).
the ct26 also made its way onto the japanese late model version 1jzgte and made 280hp stock.( the 1jz is 2.5l)and the single turbo model was also vvt-i.

so, all this led me to thinking how the spool characteristics would be on a Tc.
from my years experience with the ct on my supra, i know that it actually does spool quit fast for an old turbo(around 3100 ish on the 7mgte)

now, there have been improvements that can make the ct26 even better.
there are now BB options and different compressor trim upgrades.
on my 7m i was able to make the ct spool around 2800rpms just by upgrading the downpipe.

so, my plan is to take my ct26 from my supra and use it for a custom tc project, seeing as how this would be a cheaper option for a lot of people on here.
ct26' go for around 300.00 on ebay.
what i plan to do is take the ATPTURBO.COM t3 manifold and use the ct26/t3 adapter from 935MOTORSPORTS.COM and slap on my ct. i also want to upgrade the turbo to BB as i already have the 57trim upgrade. fabricate my own dp from an upgraded turbo elbow i already own and run a open dump wg tube. i also already have the SS drain lines too.
my thinking is that with these types of mods i should be able to hit the uppers of 350, closer to the 400hp mark just by looking at the flow traits of some of the smaller turbos being used (like the greddy 18g), this modified turbo should be somewhere a tad bit bigger than the 20g upgrade from ZPI, and come about for a lot less money.( not bashing ZPI though)
with the tc's better flowing head and slightly better compression ratio along with the more direct injection, my calculations should be very very accurate.
--btw, my NA 7mge has 9.2:1 comp ratio and i made 315hp from 8lbs from this 57 trim ct26.--

to be totally honest, i wont be able to undertake this project for a while but i wanted to put it out there just so i can wake this thread up during the process and show results.


so what im saying is also: Is there anyone with similar ideas using this turbo? any wise suggestions or whatever else?

peace
-Larry

 

Spools at 3100RPM? That's high compared to what most of the turbos for the tC spool at. Most spool up around 2500 RPM.

 

400hp? slighty better compression ratio? You aren't thinking of doing 400hp on stock internals are you?

Make sure you post a video of the first pull...

 

yeah, but remeber i am talking about a car that weighs around 3600lbs here whereas the Tc weighs around 2900lbs.
there is a lot more car to pull, so it does take a tad bit longer.
believe me, on a straght six like the 7m, the torque you have alone is way better than any Tc can ever expect to see. the 7m makes 256ft-lbs @3600rpms, and this is stock with a redline of 6250.

 

take it from me as i know every nut and bolt on the 7m. the ct-26 is not worth the hassle. there old, toyota flange, internal gated, watercooled, etc... it would be more hassle to fit one up. also after 15psi there blowing hot air and are maxed out. on the 7m the most a stock ct-26 would see is like 300rwhp. there is alot better option out there

 

400hp- yeah why not?

slighty better comp ratio?
yeah im refering to the differences between the 06 and 07 models. i didnt mention that earlier(my bad) but 9.8:1for the 07's allows a better burn process but at the same time better IC cooling methods need to be attended to. cro02 maybe? water/methanol injection with an rpm trigger?
the higher comp ratio will also allow the turbo to spool quicker due to the increased engine loads produced. keeping it cool is the main problem.

stock internals? maybe/maybe not depending on engine block stability. at the least i would need to add a block guard.
im used to working on cast iron blocks. with the age of the 7m heads im pretty much certain that the 2az will flow better than the 7m regardless of the 8valve difference between the engines, i know i can get the ct to spool at a decent level.

i cant lie i dont know everything about the 2az engines yet, but from my research it looks like nobody has really found the limits of the stock engine effeciently without trying to resort straight to new pistons.
my main goal is in the search for more torque down lower in the rpms without using a small gt turbo.

is there a place where block integrity is tested or has someone tested this yet that i have not found?

 

ha! malloy, ive been looking for you on here. btw, i have your videos from SM that i watch all the time. i still have that song in my head "everybodies' workin' for the weekend!"

anyway-anyway, i only brought this up because i still have a ct that is in good rebuilt shape that i could recoupe my losses from by resuing it.

 

hahaha, yea i'm here now teaching these fools about boost. ;) (JK)
if you want to give it a shot why not.. howvever there is going to be a ton a fab work. you got welding skills?

 

make it happen. keep us posted. sounds like a fun project

 

i was gonna use a t3/ct 26 adapter with my SS hardlines and for the dp i was gonna use a ported elbow and cut my hks dp so it turns rear while bolting on like regular.
my friend can weld or ill just take it to a shop.
or, ill modify a zpi s-pipe or something like that? i still gotta figure that part out.

 

give it a shot and see how it works for ya.

 

ct26 was never a good turbo in any form IMO. You could do much better with just a standard t3/4 cheapy turbo.

Now go prove me wrong and make some ponies

 

Hey Malloynx, let me know if you are still interested. You never responded to my PM.