CounterSpace Garage 2014 BRZ (aka BRZ 2.0) Street Concept build journal

[CSG Mike]

Originally Posted by Stevo22

What kind of aftermarket sensors can it take?

It only reads CAN... sorry

[CSG Mike]

Originally Posted by 1086

Any details on the JR kit running an e85 tune? With what you have solidified on the 91 tune (i.e. reliability, oem-like drive-ability), can we expect the same on an e85 tune? What hp/tq numbers can we expect?

I have no idea; we haven't done it, but I'd make an educated guess that on the same dynojet we got 245whp, if you had larger injectors, pump, and a heavier duty clutch then I'd expect to see 325whp without cats.

Purely a guess of course

[CSG Mike]

Originally Posted by *LongFella

I'll think there will be a good increase in hp/tq with a proper e85 tune with this kit. In addition, If you look at the speed the rotrex's is running at with the current JR set-up, there's a lot of room for growth even in that area...

Get the JR CARB Kit, run the base CARB tune, get a custom e85 tune and flip the "cruise control" switch when you want to run e85... or not when you just want the base map. You get the CARB sticker for us CA folks and an option of e85 power. Win win

Or, get a flex fuel kit and tune!

There is absolutely power to be gained with E85... especially when you compare the octane and cooling differences vs CA 91!

[CSG Mike]

Originally Posted by 1086

(sorry long question reply ) perhaps @CSG Mike or David could respond too?

The cruise control 'flip feature' is nice, but I would like to have cruise control for strictly cruise control when I take trips, which in that case 91 isn't a big deal and when I am in my city I can run E85.

If I have it correctly, the JR kit is making roughly 280 WHP on 91 @ 10psi (give or take some breather exhaust mods) .... So would you say that with the JR kit running E85, we would be seeing 310-320 whp @ 10psi?

Can the flywheel and clutch take that? That is like 300 bhp (91) / 350 bhp (e85) at the crank roughly right?

What if I only wanted to have the JR kit @ 5 to 7 psi to keep it modest? THEN run E85 at 5-7 psi as well to keep it safe and under 300, at least at first. I like baby steps in these situations. My goal is to get the kit by end of May/ beginning of June.

I know people have stated that Tada San said this car could easily handle more power. Has it been confirmed how much added power can be handled? AVO Turbo world breaks down the FA20 being more solid than previous generation of subaru engines... which is encouraging when looking to boost the FA20...

Swapping calibrations with cruise control has no bearing on actual cruise control function. You'll retain normal cruise control.

If you want less boost, you'll need a restrictor, a very creative tune, a wastegate welded onto the charge pipe, or a smaller pulley.

280whp dynojet would definitely require breathing mods.

[CSG Mike]

Originally Posted by dradernh

I read JR's instructions regarding octane in their SC installation document (see below), and was wondering how/why you chose the octane you've noted.

It seemed unusual that JR stated categorically that 100 octane should be the go-to fuel at the track. Generally, I could understand it for W2W, TT, or the dedicated track rat, but I wonder if the average owner is prepared to go that route, separate from the issue of which octanes are actually available at any given track. Away from the track, how many drivers are prepared or able to put in a tank of 100 before going out for a fun day on the back roads?

All that aside, the kit looks very attractive on a bang-for-the-buck basis. Thanks for the detailed review.

"100 Octane (R+M/2) Unleaded Fuel - It is important to run fuel designed for abuse at the track. Even stock FA20 engines should run 100 Octane when at the racetrack to ensure consistency and reliability. The additive packages in 91 Octane fuel are designed for emissions and shelf life, while 100 Octane is designed for the high cylinder pressures and full load/throttle conditions you will experience on the racetrack. When at the track, we REQUIRE running a minimum of 50% 100 Octane fuel. We highly recommend running 75-100% 100 Octane when at the track."

Source: http://jacksonracing.com/pdf/instruc...brz_manual.pdf - page 3

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In that same document, JR states that FI'd FA20 engines in the twins are going to encounter fuel starvation (and therefore potential catastrophic engine damage) when in high-G corners with the fuel level between 1/2 and 1/4 tank. They don't say whether this occurs in left-handers, right-handers, or in both.

I'm wondering if this has been your experience. If so, do you begin your runs with 1/2 tank or more and then make sure you come in before reaching 1/4 tank of fuel? Or have you successfully addressed the underlying problem - if you have, can you share your solution with us?

You should run higher octane at the track, because your car will see higher temps at the track. It's to add an extra margin for safety. Do you have to? No. Should you? Yes. Do we? We mix in 100 octane to our 91 when we get there. Will you get more power AND more safety with 100 octane? Absolutely.

The reason for running more gas is that you use fuel at a higher rate boosted. Additionally, if you fuel starve while under boost, your chances of damaging the engine when you lean out is much higher. It's better to run more gas, and suffer a 20 lb weight penalty, than to be replacing an engine.

[*LongFella]

Originally Posted by CSG Mike

Or, get a flex fuel kit and tune!



There is absolutely power to be gained with E85... especially when you compare the octane and cooling differences vs CA 91!

Any recommendations on which Flex Fuel Kit is the most reliable and easy to install?

[CSG Mike]

Originally Posted by *LongFella

Any recommendations on which Flex Fuel Kit is the most reliable and easy to install?

I have no personal experience with any of them, so I can't make any recommendations at this point...

[*LongFella]

Originally Posted by CSG Mike

I have no personal experience with any of them, so I can't make any recommendations at this point...

I stumped the Almighty Mike! Haha! jkjk

I'm not sure I'm game on the flex fuel kits though. A good E85 tune should be sufficient

[CSG Mike]

Originally Posted by *LongFella

I stumped the Almighty Mike! Haha! jkjk

I'm not sure I'm game on the flex fuel kits though. A good E85 tune should be sufficient

The purpose of the zeitronics unit is so that you can just put E85 in the tank when you have it, and 91 when you don't. It'll automatically analyze your fuel, and adjust accordingly, so that you don't have to dry up the tank, change calibrations, and then switch fuels.

[*LongFella]

Originally Posted by CSG Mike

The purpose of the zeitronics unit is so that you can just put E85 in the tank when you have it, and 91 when you don't. It'll automatically analyze your fuel, and adjust accordingly, so that you don't have to dry up the tank, change calibrations, and then switch fuels.

Makes sense, but it's a lot harder to remove a flex fuel kit if you want some warranty work done. The other way is simply flashing back to stock and putting 91 in

[ShoShin]

we want updates!!!

[TouchMyHonda]

Humm in for read later.

[CSG Mike]

All quiet on the western front.... for now.

[Cheeseballs]

This car is on the stock clutch yes?

Do you plan on upgrading before the stock one starts slipping?