Max Boost ?

[MR2Jedi]

Anyone know the max efficient boost of the CT20b turbo? I haven't seen any posts talking about using a boost controller with it and uping the boost.

[sw20drift]

Max boost will depend on fuel delivery, octane rating, and IC. On my setup I've got stock 440cc injectors and factory pump but a Berk Tech IC and I run 16psi daily on 93 octane. If your 2nd gen setup and have factory IC as well, I'd say run 14psi. Now if you're gen 3 setup, you can do 18psi w/IC upgrade. Just depends on those main 3 factors.

[MRtuned]

I've never actually talked to anyone with the berk-tech IC, but I've read good things.. How do you like it sw20drift? I don't think the ct20 has a maximum efficiency much higher than a ct-26, only a few psi. like 20ish? someone correct me if I'm wrong..

[sw20drift]

I've been very happy with the Berk Tech IC. For the price it can't be beat, comes with piping, couplers, shroud and fan. As for the "maximum" boost for the CT20, I've heard people running 20-21psi, but I doubt it produces much more power and I'm sure its not healthy without race gas.

[problemmr2]

Stock internals? I hit 17psi with my old ct26 and I was afraid of blowing something. My car was puffing smoke after a hard run after i would throw it in neutral.

[JekylandHyde]

The CT26 is very inefficient at higher boost levels (above 14-15 psi). You are safer running a CT20B at higher boost than a CT26 even though you are mkaing more power.

I would not run any turbo over 15 psi with the stock Gen2 fuel system.
The added power is not worth the added risk, IMO.

To see what's been done with CT20Bs, see here:
http://www.mr2ownersclub.com/mr2records/dyno3.htm

and here:
http://www.mr2ownersclub.com/mr2records/dyno2.htm

[MR2Jedi]

Thanks Doc! I was hoping you would chime in on this thread...

[MRtuned]

wow. Scott McClendon made more torque that horsepower. I'd like to know what kind of setup he's running.

[JekylandHyde]

Originally Posted by blackdelsol

wow. I'd like to know what kind of setup he's running.

If you click the graphs, you can see the set up.

He is Scott ... as in the "S" of ATS Racing.
That is an ATS Bored-n0stroked 3SGTE with lots of boost (25 psi).

Big boost = big torque

[MR2Jedi]

yeah! and Jeremy Horton + 288rwhp, 391rwtq @13psi with a CT26 ! How is that possible?

[MR2Jedi]

^ Oh wait...I see N2O

[CompanyFlow]

How are some of those guys only making sub 200whp marks with 14+ psi

[JekylandHyde]

Stock HP is 165 rwhp @ 12 psi, so sub-200 @ 14 psi is not unusual.

[problemmr2]

Whats the 2nd gen J-spec motor stock? I know its 225, but whats the rwhp?

[JekylandHyde]

I do not follow the J-Spec engines, but I *think* the Gen2s were the same everywhere.
The Gen3s were 225 and the Gen4s were 245.

I *think* ... I could be wrong as the JDM matters not at all to me.