.48/ 42. a/r ratio

[hek1620]

my turbo reads .42 a/r on cool side and .48 a/r on thee hot side. does this mean my turbo is like a t1 or something. just seems like small numbers to me.

[turtl631]

No, it means its a small T3, probably from a volvo or saab. My friends like those turbos on their Honda D16s, but I think its too small for a KA24DE unless you have very very modest power goals, and don't mind having a super restrictive exhaust housing.

[silencer.1]

It is a perfectly usable t3 and good for around 250whp but more likely 220 - 230whp.

[klattr1]

yea but it will be about just as much fun as a naturally aspirated KA. boost falling off like crazy towards redline and expect prolly 175 rwhp at like 7 psi and maybe 200+ at 10 psi. you might as well put a Holk Hogan choke hold on your motor with that thing.

[hek1620]

what should i do. i just want to make like 300 at the crank. i have stock internals. could i cange the housing or just get another turbo? if so how much could i get for this one? its a garrett.

[fabio420]

For everyone here, I have that exact same turbo and made 260rwhp and 300 lbs of torque evenly with a/f at11.7. But it is true that the boost drops at 5000rpm. Mine dropped from 14 psi to 11psi. However at 5000 rpm, It doesn't feel that bad since the car is already rolling. Since you seem to be like me and just want to have fun, this will do just fine.However, if you have any bigger goals, that tis t3 is too small. BTW I have an automatic s14,

[hannibal]

At 14psi, that little turbo is working its butt off and heating up the air a lot.

Try a Z31 T3. Its got 0.60AR comp and 0.63AR turbine. You can find them in the junkyard just like the Saab or Volvo turbos. It can do 300whp on a VG30, so it should be able to do the same on a KA.

I guess you could change the housings, but its probably cheaper and quicker to find a larger OEM turbo. I believe the T3 from a manual 2.3L Ford motor has the same specs as the Z31, but different input and outlet flanges on the compressor.

[Jookmasta]

yes iwannas15 is right about the ford turbo as i personally run one. its also a garrett turbo with the same specs as the z31 t3.

[hek1620]

f. it. i'll stick with this one for now. am i going to be able to run this with my 50 injectors? or size of the inj. doesnt matter as long as u tune right? i'm going to use safcII

[hannibal]

I'm not sure what youre budget is, but junkyards sell turbos for $50-100.

Your current turbo wont flow nearly enough air to make full use of those 50lb injectors. But yes, you can use them and tune them with the SAFC.

Injectors only have to be large enough to provide fuel for the airflow the turbo produces. I think SR/VG 370cc injectors would be a good match for this turbo. 370's are good til around 250whp.

And jook, thanks for the confirmation on the Ford T3...

[C-Kwik]

I don't have any of my references with me at the moment, so I can't guess as to what turbo family you might be working with.

A/R actually doesn't describe the size of the turbo itself. It actually stands for area/radius. The area is the size of the nozzle...or rather the area of the cross section of the nozzle. The radius is the distance from the center of the nozzle to the turbo wheels' axis. Typically for a given turbo family, the same radius is used. They simply change the Area to alter the flow characteristics. For any turbo, the A/R can vary and be made to any A/R configuration. But in practice manufacturers build their turbo housings with a few different A/R's rather than trying to equip to produce custom A/Rs all the time. This can make it possible to geuss the turbo family. Though it is quite difficult to figure out trim sizes with just the A/Rs.