Turbo vs Supercharger For Track
 

I know this was covered in 2006 and 2008, but I want to know what you guys would prefer for the Road Track

Turbocharger
Aerocharger (no lag turbo)
Supercharger (Roots)
Rotrex (Centrifugal)

lol.

Be prepared now...

V-Band Absurdflow or ARTech Turbo setup is the only way to go for a dedicated track car.

https://www.miataturbo.net/attachmen...ine=1319734896

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Spooling @ 20,000 RPMs+
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2” – 3.5” Rubber Couplers
High-Flow Air Filter
Step-by-step Installation Guide
Heavy Duty Securing Clamps

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· Vehicles with dual air intake setups *requires two superchargers



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https://www.miataturbo.net/attachmen...ine=1319736083

I had pretty good times running what started as a FFS setup. I have since ditch the supercharger for a v8...

I don't care how you get to 250whp, just get there.

DEI- direct exhaust injection.
Basically lagless with the lowend grunt of a roots, midrange of a turbo, and topend of a rotrex.

win win weeeeenn

That GTE supercharger is mad tyte. Stack two or three of them together and make mad boost yo. My peeps tell me you can make 20 psi with four of them and an Optima red top.

Never raced a centrifugal but I DD one (Vortech) in a BMW. Top end is great, bottom not so much. The Rotrex stuff is supposedly better.

I've raced a 320 RWHP turbo Miata and a 320 RWHP V8 Miata and they are both awesome. Pick your poison. Like Hustler said, just get there, reliably. Bring money and/or mad fab skillz.

Go to miata.net and read in the Forced Induction section. This topic has been beaten to death and yet still manages to get beaten even more.

Plus you can hook up a hose from your anus to the throttle body and eat chipotle before the track and have "BOOST SCRAMBLE" like 40psi on demand..

...For that kinda power though you'll probably need at least 9 power cards and at least 3 e-cools

^been watching south park lately? chipotle-away!

+1

I have had both, they both have +/- points!

I like usable power, so I'll take the turbo.

I'd rock a rotrex or a well built turbo setup from Absurd or ARtech. Honestly I think you could build a 170-180whp naturally aspirated miata for 2.5k and thats what I would build.

f20c or turbo

Low boost turbo with high compression running E85. It will feel like a V8.

:inout:

I'm a S/C guy....but if I were building a track car I would go Turbo.

Of all these, I wouldn't choose the rotrex.

But really I only see two choices: turbo or sc, with one style of each for both.

Why's there no love for the Rotrex anymore? 12 months ago it was the new hotness.

I know they are a little expensive, But I was looking at a Aerocharger because they are made so if you want to go to the track and don't want any lag or if you are driving out to the track and don't want to be in boost all the time. All has to be done is to change a screw setting. Has anyone had experience with these turbochargers.

Because for some reason people were under the impression it made full boost by 500RPM, which is never the case for another run of the mill centrifugal supercharger?

There's a reason the VF engineering kit failed.

Acutally, from teh dynos I've seen of the aerodyne turbos, they impress me little as well. Just size the turbo correctly and you compromise little.

here's one running low boost:

https://www.miataturbo.net/attachmen...ine=1319814605

I think this was 5-6psi on a 1.6L

Compared to my $150 on wastegate attached to a very similar manifold:

http://www.boostedmiata.com/gallery2...rain_10psi.jpg

red dashed lines.

You never get off idle boost with a centri
I mean you get all the downsides of a sc with all the (supposedly) downsides of a turbo
no torque and not much topend.

only thing going for them is the ease of installation and relatively trouble free operation/dependability

I thought these numbers posted on a thread on miata.net were somewhat interesting. I think it might be the fact I’m running a 99 head with stock cams as part of the reason mine falls on its face on the top end but I’ll take the wallop of mid range torgue and power any day. The fact that the power drops before redline is better than a shift light for keeping you in the safe operating range while on the track. Lag? whats that?


TrackDayHooky – Rotrex system tweeked to the max
RPM Powa
5000 179
5500 221
6000 249
6500 286
7000 364
7500 420
Savington – Absurdflow 2871 1.9L
RPM Powa
5000 280
5500 300
6000 330
6500 340
7000 350
7500 340
bbundy – DIY 3071 with FM 2.0L
RPM Powa
5000 310
5500 325
6000 340
6500 356
7000 340
7500 300

This is a friend of mine with a Nissan KA24DET and he's racing in NASA, which he has to stay under a certain power to weight ratio. So his boost on his GT2871R goes low rpm 12.5 psi to high rpm 6 psi, so his hp is as much as a flat line as possible. (thats one good thing about turbos)
https://www.miataturbo.net/attachmen...ine=1319820423

well, its safe to say it would be hard to stay in the that rotrex's power range on a 5-speed. I could see it being useful on a 6-speed though...with a 4.1 or something.

With these power numbers you aint running a 5 speed unless mayby you got a Quaife gear set in it.

FWIW at Pacific Raceway I've hit 7100 rpm in 6th with a 3.636.

Bob

While I love my rotrex setup I have to admit a turbo would be better for area under the curve. With the narrow power band of a rotrex having close ratio 6 speed and 4.1 rear is essential. My car also has a skunk2 to help flatten the curve. Starting from scratch the turbo looks more appealing.

Using an AVCR boost controller on a turbo you could have your class HP available over the entire working RPM (redline to after shift rpm) of the motor. That's not going to happen with a SC. Average HP in the operating range is more important than peak HP.

^ yea thats true also! I was not taking the power handling into consideration.

As a NA miata, the fastest I have ever gone is 115mph on the back/front straight of VIR. thats probably 5.5k-6k in 5th gear with a 4.3 rear end.

So any one of these options would a great addition!

Interesting strategy. I have been wondering about that one myself recently. I presume he is racing in TTS or TTU?

Yes he is racing TTS and he was in a Mag a few years ago but here are some video/pics


http://video.google.com/videoplay?do...arch&plindex=0


https://www.miataturbo.net/attachmen...ine=1319846770
https://www.miataturbo.net/attachmen...ine=1319846770
https://www.miataturbo.net/attachmen...ine=1319846770
https://www.miataturbo.net/attachmen...ine=1319846770
https://www.miataturbo.net/attachmen...ine=1319846770

Very cool. Do you know what he is using for a boost controller?

I asked but here is the rest of the info

http://www.ka-t.org/forums/viewtopic...er=asc&start=0

That's Rob Symonds 240sx. He's a garrett turbo engineer. Cool guy.

He's running a high hp n/a motor now.

Turbo charger being powered by a turbojet.