fastivab6tg25mr

is there a reason holset chargers have not been brought up? they are proven for some big power and thanks to the DSM world you can get a variety of hot side ARs im planning on going holset hx 35 on the bulls eye performance turbine housing thats a direct fir for dsm's. shooting for the same amount of power. the small hot side give quick spool making it a decent daily.

shuiend

iTrader: (24)

Do the Holsets use the standard t2 or t3 flange? If not that would be why we do not use them. People tend to go for what is known in the miata world. Also up until the past few years there were very little selection in custom made manifolds that would offer a different flange.

Techsalvager

T3 \ T3 Divided housing

chicksdigmiatas

iTrader: (11)

We put a holset on a KA24 with great success. I realize the difference between the displacement though. I had thought about going that route, but I just don't feel like changing my hot side set up.

fastivab6tg25mr

bullseye performance makes them with a mitsu 16g flange and a .55 ar hot side

http://www.bullseyepower.com/u_turbine_housings.asp

JasonC SBB

No, that's "1.33x" of power band. It's the *ratio* that matters, not the difference:

8000/6000 = 1.33


4000-6000 RPM is "1.5x", way wider:

6000/4000 = 1.5


So to duplicate a 4000-7000 powerband with a car that has peak power at 8500:

7000/4000 = 1.75x

8500 / 1.75 = 4860

So you will need 90% of peak torque available from 4860 to 8500, with the same peak power, to duplicate the performance of Savington's 2871 setup. You will also need shorter gearing to match the higher revs.

You won't get it with a car with the powerband from 5500 to 8500. (thinking that 7k-4k = 3k, and 8.5k-3k = 5.5k)

Savington

iTrader: (31)

I'll just leave this here. Compare the low-end torque numbers.

Torque matters - just ask the Rotrex crew

Faeflora

iTrader: (2)

Nice math.

Savington's setup is not god's gift to miatas. Stop slobbing the 2871 ****

JasonC SBB

Sav,

The area I circled in yellow is an artifact and not real data, right?

JasonC SBB

My main point was the math. I merely used Sav's dyno as a worked example.

Generally though the higher the boost the narrower the powerband.
A drag car won't need as wide of a powerband as a track car, which in turn doesn't need as wide as a street car needs.

Having said that, a theoretical setup that would match Sav's spoolup but rises to a higher peak and holds it to 7000, will have a "narrower powerband" but would match and exceed Sav's torque at all RPMs, and thus would be faster.

18psi

iTrader: (76)

Neither is Jasons or yours, so wtf is your point?

Each car serves a specific purpose, none of these cars are some crazy new concept or any of that kinda bullshit. Going big as **** with oober expensive parts to create a highway/dyno queen is nothing new. Its badass, but I'll bet most on here don't even care.

On top of that neither you nor jason has run anything at all at the track yet, so if anything the person with most authority on straightline performance in this thread is JayL and a very few others that actually went 11's and trapped over 120.

Savington

iTrader: (31)

Yeah, those are artifacts.

JasonC SBB

A different Jason, that is, not me.

18psi

iTrader: (76)

Yes I meant Jtothehow

Faeflora

iTrader: (2)

You don't even have a miata so stfu

18psi

iTrader: (76)

Are you retarded?
Yes I do. I got another one fa66ot.

And that's not even the point: you guys act like you're Gods gifts to the miata world by simply spending a shitton of money and going with insanely oversized turbos.

Faeflora

iTrader: (2)

You're right. The miata world should be content with making less horsepower than stock cars. Frankly, you and all the other 200/300/400hp champions sound old and conservative and closeminded. You all are just another breed of the types at miata.net.

18psi

iTrader: (76)

ok champ
If we're being frank here, the same exact thing can be said about you and j: you both sound like broken records every day saying we're all old and outdated and happy with a "MEDIOCRE" 400whp miata while you two are like Christopher Columbus discovering new worlds and ****.

The ironic part is that neither one of you has gone much past 400 yet either but act like you've already got numerous 900whp dyno plots

But ILU both, despite the fa66otree.

nitrodann

I want know know who cares about a highway pull with 400HP. Isnt that what a 5000 buck second hand hayabusa is for?

Dann

Faeflora

iTrader: (2)

You're old and boring.