On the other hand, cause I feel like a noob today...i searched and just read about injector driver circuitry. Rx7 550's are cheap and easy to come by, and they are low imp like my 460's. So I think I'll look for a set of them.

dw600's are completely pnp and work excellent. many adaptronic owners started off with them.

Many of us have moved on up to 1000's BUWAHAHHAHAHA

Since the DW 600's are high imp, do I need to modify my ms?

do you have the circuitry, or an external box for injector resistance now?

the DW units are plug and play, no resistors needed.

Selecting proper turbo
 

So I'm stumped about the turbo. Currently I probably make about 235 whp at 14 psi. It is fully spooled by 3700rpm.
I want to make 250 whp easily by 10 psi, and be fully spooled by 5000 rpm. I'm thinking 2871, or maybe even 3071? Must be internally wastegated. Please help me choose.

Why the 10 psi limiter? 250ish WTQ with an IAT of x is what it is regardless of what the KPA happens to be.

True. I was just using the 10 psi as an example. Meaning, I want to make a lot more power than I do now, with less boost and still have headroom. Where my current turbo is maxed, I want my new turbo to just get started.

this just came up with a friend just now and got me thinking actually....


What are the miata pistons good until? or is it just detonation that kills the pistons, but the rods like to bend all over wonky with power?


FYI im thinking could i max out a 2860 or 2871 on stock piston/m-tuned rod combo?

The general opinion I got when reading up on it was that detonation kills them. Improper tuning, bad gas, knock, etc. Not steady pressure. Their ringlands aren't weak like on a subaru so they don't "just go".

Rods on the other hand, have been known to bend/break even on well running engines. In fact quite a few were pulled from OPERATIONAL engines that were all bent.

Cool... when i was in my nissan... i did this...which is why im not fond of stock pistons:

Attachment 197372
at 7psi with decent timing and lots of fuel....



But, i need to put a new gasket set on my miata since i have a ton of little oil leaks to fix and when i have the head off, i might as well toss in some quick rod action.

So back to me and my thread. I was looking at the GT2871 on the Garrett site and it looks like they come in many different part number and turbine A/R's. Which one do I pick?

I'm pretty much deciding the same thing as you. What you(and me) NEED to remember in choosing a turbo/motor setup is whether or not it's for a street car or a track car.

For street cars, a smaller turbine a/r is great for spool and the 2871 and 28RS will still have good top end power and have headroom for 300+whp.

Street car and internally gated: the 64 a/r is generally chosen.
Track car: 86 a/r is used. Lower egt's/ better top end. Good for cars that are constantly in boost.

Hope this helps.

If you go here, it lists different 2871's in .64 A/R with many different wheels. How do I know what to choose?
http://www.turbobygarrett.com/turbob...ison_sheet.htm

If you go here, it lists different 2871's in .64 A/R with many different wheels. How do I know what to choose?
http://www.turbobygarrett.com/turbob...ison_sheet.htm

Damn double posting I phone going in and out of 3g pos. That's what I get for posting from work in the building.