Turbo? If so which one?

I’ve been looking for a low end torque turbo for my 03 3rz. Anyone know of an inexpensive turbo? Or maybe even a supercharger?

 

Low end tq turbo is not really a thing. Supercharger is what you want.

 

Oh ok

 

Small turbos even require rpms to spool up so most power is mid to high. Superchargers are spun by the crank so you have low end gains.

 

Honestly, you might be better off taking the money you're planning to dump into a turbo/SC and put it towards a truck with a v6.

Forced induction can get expensive and finicky very fast. Especially if you go for a cheap one, because you end up turning around and buying a good one after realizing it was cheap for a reason.

There are several threads of guys boosting their Tacos, but it's not like they throw $500 and a weekend of work at it, and end up with another 100hp.

 

Just fart strait into the intake.

 

Seriously though cheap is not the right mindset when it comes to forced induction. Cheap is a good way to blow your engine.

 

And after you boost an I4 you still only have NA V6 power

Unless you dump even more dollars into it I guess

 

Yeah, apparently there are dudes getting pretty decent HP from the I4's, like 300+ or even more iirc, but that's a serious commitment in time and money.

 

maybe and engine swap to a v6. Don't know how involved that is on a gen 1 but it would probably be cheaper and easier. Definitely more reliable.

 

no, you want COLD air...

 

3RZ is a 2.7L, so I'd find an OEM turbo from a car with 2.0-2.5L engine. This will bias you smaller and make it spool faster. This is also a great way to get a quality turbocharger for ebay/China prices.
The caveat is that OEMs typically undersize turbos from the get-go a little bit (for the same reason), but they usually run 16PSI+ so you end up on the outer regions of the compressor map. As long as you keep the boost lower than this, the mass airflow should be contained for the most part in the correct regions.

Absolute minimum budget should be $2,000, and expect a 25-50% overshoot.

 

For anyone reading across this thread in the future, this info is bad.

Small turbos are going to be key in generating low end tq. A supercharger will make next to no difference at the low end being they're belt driven and the boost they make is directly proportionate to rpm.

If one were to throw, say, a 2871 on a 2.4(basically my plan), youd be hitting full boost by 3k rpm and adding a gob of grunt to the powerband. Ive never seen dyno figures for any turbo on these engines but thats generally how it works.

 

Fast, cheap, reliable.

Pick any 2.

 

Inexpensive and any form of forced induction (turbo, supercharger, procharger) don't belong in the same sentence.

 

Superchargers generally struggle at high RPM, otherwise you're correct in your correction.

 

I’m running a BorgWarner EFR 7163 on my 2.7L and it’s pretty spooly, but it definitely wasn’t cheap.

 

Mmmmmm EFR.... Almost not fair as those get to spoolin real quick for their size. If I could afford it(and the engine build to support it) Id have their 6258 on my miata.

 

What kit are you using if I may ask?

Id been doing some research around here today and havent found much from the last few years. I know of the LC kit(terrible reviews on
product and service) and the KO kit. I guess theres the random ebay kit too.

I wanted to go with the KO kit and throw a 25 adapter on it, use something like a 2871 kit, do some fuel stuff and then throw an ECU at it. Everyone says to buy haltech being boomslang offers the wiring kit. Was curious if there were in fact any other viable options. Also, where do people source the startup tune?

I was seeing your name pop up quite a bit while doing research as well. Please feel free to reply as well


Id apologize for thread jacking but this is still pretty on-topic for any future folks who come through here.

 

Yeah mine spools so quick the wastegate cant keep up lol. Spikes to 9-10lbs before it fully opens and then it's still making 7-8 on the 5psi spring.

Someone else on here was running a EFR 6758 on their 2.7 and it built boost at cruise on the hwy. Mine i am still able to cruise in vaccum, so i think i got the perfect size. Starts spooling around 2300rpm and is full spool by 2600ish