Pure Motorsport: JDL Turbo BRZ Track Build

[DocWalt]

Originally Posted by ATL BRZ

Thanks. I will not be tracking the the car until all the new aero is installed. Too many variables to get a decent isolated evaluation of the spoiler swap on a track. If anything it lowered drag slightly, but it's imperceptible even at the speeds I frequently run on track.

Fair enough. The TRD spoiler reduces drag and rear end lift on a stock car, I'd love to see numbers on what it does with the addition of the DWL diffuser.

I'll just wait patiently for more track reports

[Bg8780]

Originally Posted by ATL BRZ

Yep. From what I understand after a brief explanation from the owner, Mustangs measure torque and calculate horsepower. Dynojets measure horsepower and calculate torque.
@Bg8780 's car recently was recently EcuTek tuned by TSM and made 190whp on 93 with a header and 2.5" headerback on the same Dynojet my car made 195whp on back in April with E85 and stock front/mid pipe. On the Mustang dyno on Sunday his car made 167whp/132wtq with the same 93 tune and mods. Mind blown.

Definitely heartbroken lol. If anyone ask; I still say 190whp

[Lawn_Mower]

It's a little tough to tell, but does the TRD spoiler cover the holes from the BRZ's stock spoiler, or are they still visible?

[ATL BRZ]

Originally Posted by Lawn_Mower

It's a little tough to tell, but does the TRD spoiler cover the holes from the BRZ's stock spoiler, or are they still visible?

It covers all the holes completely.

[Xero-Limit]

Originally Posted by DocWalt

Bizarre. Dynos are strange beasts. I love the look of the TRD spoiler. Do you think you'll get track time to evaluate it separately from the splitter?

I wish I could convey the difference you see with the various dynos when you travel around. Only good comparison is on the same dyno, under similar conditions. Eddy current type dynos essentially have a "dial" to calibrate whichever way you'd like (high or real) while dynojets can be problematic and easy to fool with a hairdryer pointed at the weather station...

[DocWalt]

Originally Posted by moto-mike

I wish I could convey the difference you see with the various dynos when you travel around. Only good comparison is on the same dyno, under similar conditions. Eddy current type dynos essentially have a "dial" to calibrate whichever way you'd like (high or real) while dynojets can be problematic and easy to fool with a hairdryer pointed at the weather station...

I hear ya, I enjoy the dyno number pissing matches. I'd rather see track times!

Say hi to Hans for me

[ATL BRZ]

Getting busy.

To Do:
Mishimoto Radiator, Hoses, and thermostat install
Velox race splitter install
JDM Underbody panels install
Install new driver's side ingnition coils
Change all fluids to fresh Millers Nanodrive



Low temp thermostat installed. Stock is 88C, Mishi is 76 C



Radiator installed.



Made more progress after this and finished up the radiator install but didn't take any more pics. Taking my sweet time and finishing up later this week. More updates and pics soon.

[Scracho]

Great build

[ATL BRZ]

Edit: decided against the oil pan baffle.

[Scracho]

Originally Posted by ATL BRZ

Going to wait a week or so to change the engine oil since I just ordered a Moroso oil pan baffle.





It should give me some extra safety against oil pooling in the heads in high G corners. I think that's why I was seeing a small oil leak.. from behind the coil/plug area on the driver's side running down the side of the cam carrier and slowly collecting at the bottom of the driver's side. Makes sense because nearly all the tracks I've run the car on are clockwise and have lots of hard right turns.

I got a good deal on the baffle for $106 on eBay. Now I just need to find the right sealant for the pan when it goes back on.

Good call.

Permatex Right-Stuff (Hondabond) has always worked well back in my days at Honda.

[ATL BRZ]

Made more progress today.

Installed the JDM underpanels after changing my transmission and differential fluid with fresh Millers CRX 75w90 NT gear oil






When pulling my original drivers side coils I found the source of my slow oil leak. It is not leaking from the cam carrier seal as I originally thought. It's coming from what looks to be the hole for the coil bolt and/or the coil/plug tunnel. I'm not sure if my eyes are deceiving me since it's difficult to see in there at all without an inspection mirror but the tunnel felt dry and the only oil I could find that was collecting at the bottom of the coil looked like it was originating at the threaded hole for the 10mm bolt securing the coil to the block. Very bizarre.







Plug tunnel appears to be dry, but I could be wrong since it's difficult to see.



Anyways I installed two new 652 coils on the driver's side (from below) and will keep these two original coils as spares since they still work fine and don't throw codes (yet).



I was going to install the race splitter but I discovered that I'm missing some hardware. @FT-86 SpeedFactory are taking good care of me and already sent it to me in the mail today. Thanks again Yo.

I also decided not to keep the Moroso oil pan baffle. I'm not sure it would be worth installing since the pan is adhered to the block and won't come off without prying it and inevitably bending it and have to flatten it back. I chatted with @Reaper about this and after agreeing that the factory baffle is sufficient and I don't see much benefit to the extra baffling since the oil level is already above the top of the pan in the FA20. I also haven't heard of anyone having issues with the pan itself not holding oil in it.

We agreed that I should instead be considering an oil accumulator (Accusump) to keep pressure and lubrication under high lateral loads before bothering with a baffle for the pan. Right now with 245 street tires I don't think it's an issue that needs to be immediately addressed. Should I go wider and stickier then maybe I will look into it more seriously.

Might go ahead and change the oil this weekend and do the drilling and bracketry installation for the splitter so I can get everything back together and ready for the rest of the hardware to get here.

[DocWalt]

Looks like that bolt hole for the coil got drilled through by accident or something... Weird.

[Reaper]

You on R comps with forced induction will be an issue with fueling from the stock tank on e85. I have a plan when you do it.

[ATL BRZ]

Originally Posted by Reaper

You on R comps with forced induction will be an issue with fueling from the stock tank on e85. I have a plan when you do it.

Surge tank?