CT20B

Q&A regarding engines, turbos, and intercoolers and power upgrades

Postby ChrisD » Mon Sep 20, 2004 7:06 am

That is correct. Like I said you need a 185 manifold and more than likely will have to relocate the oil cooler, and possibly the oil filter. :)

Good luck with it!

Too add to this thread, Im now running a 13.6 on this turbo at only 14psi...still have the stock jdm ecu too.
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1988 ST165
1994 ST205 WRC
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Postby stevieg » Mon Sep 20, 2004 3:42 pm

still debating on whether or not to drop in my complete gen3 motor yet, bigges thing is it isnt ready yet (havent finished cleaning it up yet). That and i dont know if i am gonna keep the car long term yet.

steve
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Postby Kyoto » Mon Sep 20, 2004 11:44 pm

StevieG: Do it!

BTW Chris a 13.6 ET is awesome. Im damn jealous!
Tim // Melbourne, Australia

1986 ST165. 152,000km on chassis
ST205 WRC engine / IC system / rear LSD with 82,000km
Blitz K1-380V
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Aussie 3" dump pipe to 3" catback system
TWM short shifter.
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Postby stevieg » Tue Sep 21, 2004 4:20 am

i'll probably decide what i am going to do in the spring, gonna drive the alltrac for the winter and see if it grows on me, my last project car was an 87 mr2 with gen3@17psi which laid down a 13.2@102mph with zero tuning and massive heatsoak, then it promptly burnt up the next day :-( so me hopping into this alltrac it really feels like a slug in all aspects of performance.

steve
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1987 mk1.5 Mr2 (RIP)

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Postby AWDios » Tue Sep 21, 2004 2:13 pm

what do we think the max boost should be on a 20b. Not thinking so much for now as after a do more mods, just trying to see where this thing will top out.
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Postby ChrisD » Tue Sep 21, 2004 2:51 pm

If tuned properly, I can see it being quite efficient up to ~21psi. Maybe a bit more. You could get deep into the 12's on this turbo if you wanted to imho.
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Postby AWDios » Tue Sep 21, 2004 3:25 pm

Yeah, just trying to get an idea for when I get into EMS and all the other goodies.
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Postby stevieg » Wed Sep 22, 2004 1:14 am

just built my megasquirt for my gen3 today :-)

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Postby MARLON1211 » Thu Sep 30, 2004 11:27 am

okay as soon as am done with my vacation am considering getting a 20b. Can't wait, does anyone have this on their track installed and running especially on a 185 allready, did it make a whole lot of differenceI know lots of MR2 guys favoring this set-up especially for its no hassle bolt on, and a turbo upgrade.
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Postby ChrisD » Thu Sep 30, 2004 2:43 pm

Yeah I have a 185 engine...so everything that I'd said on this turbo should apply to you as well. :)

Can't say much. It's a kick ass turbo!
1988 ST165
1994 ST205 WRC
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Postby Kyoto » Sat Oct 23, 2004 10:03 am

After locating a CT20B and a 185 manifold to suit, having given my tuner a run down on whats involved with fitting them, he seemed fairly reluctant to do it. His reasoning was that given the age of the engine, the fitment of a remote oil filter would lower oil pressure to potentially risky levels. Not something advisable for 3SGTEs of my vintage. What are people's opinions?
Tim // Melbourne, Australia

1986 ST165. 152,000km on chassis
ST205 WRC engine / IC system / rear LSD with 82,000km
Blitz K1-380V
Apexi Power FC
Aussie 3" dump pipe to 3" catback system
TWM short shifter.
Whiteline front strut brace
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Postby MATT-S » Sat Oct 23, 2004 5:57 pm

I have just fitted a 20b to my 185, I got the ceramic type off a jdm st205 wrc. It is way better than the 26, I have noticed that it's slightly more laggier, but not a lot. When it spools it's sick, it pulls and pulls it just keeps going, the last 2k of the rpm range is transformed, it really feels like a different car. One other thing with this turbo, it is lot louder you can really here it sucking the air in, but that's not a bad thing.
If you can get your hands on one go for it.
Cheers
Matt
[/img]
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Postby Kyoto » Sat Oct 23, 2004 11:32 pm

That really hurts. Its sitting next to me now! :(
Tim // Melbourne, Australia

1986 ST165. 152,000km on chassis
ST205 WRC engine / IC system / rear LSD with 82,000km
Blitz K1-380V
Apexi Power FC
Aussie 3" dump pipe to 3" catback system
TWM short shifter.
Whiteline front strut brace
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Postby BraveUlysses » Sat Oct 23, 2004 11:37 pm

I was at a tuner shop today in Tacoma and watched a 92 mr2t with an aussie dp, ct20b and a mbc @ 15 psi hit 250 WHP.

Simply amazing how much power he put down for so little mods. I MUST get one of these turbos asap.
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Postby Zomb » Sun Oct 24, 2004 12:09 am

MATT-S wrote:I have just fitted a 20b to my 185, I got the ceramic type off a jdm st205 wrc. It is way better than the 26, I have noticed that it's slightly more laggier, but not a lot. When it spools it's sick, it pulls and pulls it just keeps going, the last 2k of the rpm range is transformed, it really feels like a different car. One other thing with this turbo, it is lot louder you can really here it sucking the air in, but that's not a bad thing.
If you can get your hands on one go for it.
Cheers
Matt
[/img]


Hi. If you have a ST205 WRC turbo then you will have a reliable steel exhaust wheel and shaft, as opposed to the ceramic ones found on all other Gen 3 3SGTEs. The ceramic ones spool at about 2500rpm... its awsum! the steel one shouldn't be much worse.
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