Treadstone Performance Turbo Kit Update!
 

As some of you know, Treadstone Performance in Miami has my FR-S to R&D a turbo kit. Well, I can finally give you an update on their progress! Let me start by saying they are using a Borg Warner EFR6258 turbo in this kit. They plan to offer other kits for varying performance goals, but haven't decided on those yet. I don't have pricing, and they will post up that information once they are ready to do so. They are tuning with EcuTek and will begin that in a week or so, just waiting on a final piece to be machined. Before I get to the pics, I know the kit looks similar to others being released. They did not copy these kits, as they've had this design from the beginning. Anyway, enough of my rambling, here are a few pics:

perfect fit

BorgWarner EFR 6258 will spool very quick and should make immediate response over 2k rpm.

Nice choice on the turbo if your goal is around 300hp

Thanks! Yeah, 300whp is the initial goal.

I'm surprised that you went with the 6258. The 6758 would be very similar in spool, but have so much more potential up top. I think the 6258 will not flow enough on the top end and will be noticeable with the TQ sliding off. Time and dynos will tell though.

EDIT: I'm so glad someone is trying out an EFR on this engine. Can't wait to see how it comes out. These suckers are TQ monsters with the Miata 1.8L engines.

Love the cold air pick up and the Borg Warner turbo - my choice if i was going that direction

Thanks for the update, any info in pricing yet? Are you back in the States?

the turbo seems crooked.

No pricing info yet. I've been back for over a month. However, I'm heading back out in a little over a month :(

The 6758 is still a possibility. Like I said, they want to do staged kits, so it very well could be in the mix!

Haven't seen the car in person, so I can't confirm or deny it, but it does kinda look like it in the pic. Maybe it has to do with oil return, IDK :iono:

Any chance that CAI could suck up water??

When is someone going to out a twin turbo set up? You think there is enough room in there?

Stay safe man, God Bless you.

Thanks. This will be a longer trip, unfotunately.

Keep your head down, so you come back...so we can get your turbo install results! Ok, that's shallow.

Honestly, stay safe, and THANKS.

Don't worry, the turbo kit will continue with or without me here! I'll post updates as much as I can, and hopefully soon there will be a more detailed thread on the kit.

If you drive the car into a river or lake!

Seriously, though, I don't think there will be a problem with water getting into the intake. I think it's mounted high enough to alleviate water ingestion. However, I'm not an expert on them, it's just my opinion.

That would actually be pretty cool. You could do a true dual exhaust with a small turbo on each side. Not sure how practical it would be on a 4 cyl., but would definitely be something different. I was looking at doing a twin turbo setup on my Pontiac G8 GT, but never got around to it.

that is the location where the stock piece before your airfilter picks up its air from so i doubt it.

good looking kit brah!

is this everyone's first car? wow.

twin turbo = stupid and no the car isn't going to hydrolock.

Subscribed.

It would be very tough... and interesting to say the least... as there are 2 banks of cylinders, but only 2 cylinders per bank. You would have to get an aftermarket manifold for each bank that would run into each turbo. I'm not sure how effective it would be with only 2 cylinders per bank, not a whole lot of exhaust running to each turbo.

For small engines (4 banger in this case) it is of course better to use a single turbo, because it produces sufficient exhaust gas just that one turbo efficiently. For larger engines, it is usually smarter to use a pair of small turbochargers instead of a big one, because small turbines result in less turbo lag. But they are able to produce enough exhaust gas to power both turbos.

It looks great but the heat soak off that turbo location by the intake pipe would concern me in any racing application. Prolly fine for a daily driver.

Oh, I forgot to mention, the piping will be powder-coated black!

Over pipe & test pipe in the works! Will be options for the kits!

so youre making a turbo and a complete exhaust too?

At least through the test pipe (cat). They're thinking of doing a complete exhaust as well.

Here are a couple pics of the header:

And the down pipe:

lovely.

Too bad that they're only making the V-Band frame for the EFR turbos in the B2 frame.

Wish they would finish I enjoyed there turbo kit for the tc

We did only make the B2 V band turbine housings, now were wishing we would of made it for the smaller B1 units (62 and 67) We didnt because Borg Warner already made them for the Indy cars, and said they may release them to the public. If they do not, then we will jump in and fill the void! converting this set up to V band as well!

It would make for an awesome track turbo. Bolts back out of the boosted trck miatas all the time. They've gone inconel with safety wire. This would open up the market for them. Now if we could figure out a v-band for twin-scroll.

Funny you should mention that, because they're looking at a twin scroll upgrade.

Only concern I have is the hot side of the turbo sitting right under the pipe before the TB.

Any idea to keep intake temps down? Seems like the job of the intercooler is going to waste.

Here's a link to info about the turbo:

http://www.treadstoneperformance.com...6258+EFR+Turbo

a turbine heat shield for the turbo, and some DEI gold reflective material should do the trick!

Looks good! Cant wait to see some numbers from this kit. The guys over at Treadstone are awesome!