Review my Turbo Plans for HPDE toy in Florida
Hi All - I read through the turbo thread for track days sticky, but it was unclear what advice was for HPDE plebs vs. actual turbo miata race guys, so I wanted to try to clear up some questions.
I was able to find a local guy selling off most of his turbo setup for fairly inexpensive and wanted to get everyone's opinions. I've read a lot of the posts but thought since there's very few new posts, you guys need someone to flame. My goal is to run roughly 180 to 220whp, but really basically enough to make it feel like the nb2 I have isn't "slow" in every straight. I am at the point where i'm keeping up with most things on ultra high performance tires in the twisty bits but way off in every straight to just about everything. I'll be doing the 20 to 40 minute HPDE session style of running. My Car:
I will run mostly in the south east region, so 50F up to 90F. A few questions:
Thanks everyone. If you would prefer, I'm happy to repost this in that thread so its all in one place. |
I don’t have answers to every one of your questions, but as someone who’s running a car that is basically what you’re shooting to build here’s my two cents.
-100% yes on an oil cooler. I run a TrackDog racing kit. Original oil cooler with the kit worked great until a piece of asphalt smashed into it. I replaced it with a Setrab 25 row and am still running it. My oil temps would’ve been way too hot on track at above 75-80 degrees ambient without the cooler -Turbo blanket shouldn’t be required but heat shielding is a definite yes. My car survived a couple track days without a heat shield but I wouldn’t risk it. -Definitely still do a coolant reroute even on an unopened NB2 engine. SuperMiata recommends this and claims you’ll still see better cooling performance even with the revised head gasket design -I run 91 octane on track with my car. It’s always worked fine for me. Just make sure your tune is safe for it and you have safety measures taken care of like MAT and CLT based timing retard. -RX8 injectors will work but will fall way short of the EFR6258’s potential. We’ve all said “200-220whp will be enough for me!” but you’re probably going to want more power and more boost at some point and then you’ll be buying injectors twice. I personally started with FlowForce 640s and I’m about to get rid of them to buy 1000cc injectors. Plenty of similar stories on this site. |
A few questions:
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Originally Posted by Midtenn
(Post 1642560)
A few questions:
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Originally Posted by tfbmiata
(Post 1642626)
Is this like a 300whp thing or a 180 to 220whp thing?
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Originally Posted by Midtenn
(Post 1642629)
It is any tracked Miata thing. I broke one at 150-160whp. It's likely due to the inherent vibrations from the BP motor over extended high RPM use.
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Originally Posted by tfbmiata
(Post 1642631)
welp, skunk2 here I come.
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Originally Posted by Gee Emm
(Post 1642648)
Do search on here for the fixes for the poor QC on these, they are not optional (says someone with experience of fitting three of them). But as Midtenn says, they are the only reliable fix for that problem, and the fixes are easy.
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Yes, the Skunk2 throttle bodies have poor QC and a handful of issues out of the box. However, the issues are easily fixed and the a "massaged" Skunk2 TB is preferable to a stock throttle body (you don't have to worry about the engine swallowing a throttle plate bolt or the throttle plate shaft snapping off).
Lots of documentation on here about the fixes for the out of the box S2 TB issues. Nothing too painful or time consuming. |
Originally Posted by Z_WAAAAAZ
(Post 1642652)
Yes, the Skunk2 throttle bodies have poor QC and a handful of issues out of the box. However, the issues are easily fixed and the a "massaged" Skunk2 TB is preferable to a stock throttle body (you don't have to worry about the engine swallowing a throttle plate bolt or the throttle plate shaft snapping off).
Lots of documentation on here about the fixes for the out of the box S2 TB issues. Nothing too painful or time consuming. |
Replace front FM sway with much larger 1.125" RB
Replace FM rear sway with smaller 14mm/ MSM "upgraded" as in OEM from auto trans or all aluminum? If OEM, swap for all 33-39mm aluminum Brakes will not be adequate for intermediate to advanced driver on 200tw. hop for 11.75 x 1.1 or 1.25" with 7420 pad size If on old stock engine, run thicker synthetic, like 20w50 add a Setrab oil cooler with -10 lines 15x10 with 245/40 ideally, but 15x9 at minimum. 200tw Recommend a crane or support for turbo to avoid cracking and loose fasteners on manifold 195500-4450 Denso RX8 injectors went out of production about a decade ago. Everything I see now are mystery meat aliexpress. Too small in any case. E85 will need much more injector. Good calculators online to figure out size. We like Injector Dynamics, Deatschwerks, Flowforce Heat shields and coatings. Blankets cook CHRA's 93 is fine for your goals. Corn is better but can be a PITA logistically Yes, epoxy the stock plate. Option is a Junk2 but blueprint it. Out of the box they are a bunch less reliable than OEM. Reroute. Yes Hood vents. Yes Fully seal radiator and undertray. Yes Motul 75W90 GL4 or Motorcraft "unicorn juice" in trans my .02 |
Emilio's "Replace front FM sway with much larger 1.125" RB, Replace FM rear sway with smaller 14mm/MSM" reflect what I, and other MSM owners found, DESPITE the Racing Beat Sway Bar recommendations
I sold my 1.25" RB sway bar not long after installing it due to understeer issues and was happier with the RB 1.125" sway bar. Larger sway bars also put way too much stress on the flimsy OEM sway bar mounting braces so install the Supermiata Sway Bar mount blocks or Racing Beat Sway Bar mount blocks too. I'm not a fan of turbo blankets or wraps, you won't know if there are any cracks until they become a big issue. For this reason, if you have an enclosed turbo heat shield, it should be easy to remove to routinely inspect the turbo, otherwise you'll keep putting it off. |
Originally Posted by tfbmiata
(Post 1642558)
2. My first principle when modifying cars is "what would oems do?" Oems always use heatshielding for important parts, and sometimes multiple for different parts. So heatshielding is obviously a no brainer. Turbo blankets I think are just a nice band aid sort of solution if you can't get a nice heatshielding over the hot side of the turbo. They will likely increase the wear on the turbine housing but that's a tradeoff we have to make and is maybe worth it. One thing I would like to see more with these aftermarket turbo kits is solid/hard lines for coolant/oil close to the turbo that switch to "soft" lines away from the turbo. Most OEMs do this, whereas aftermarket usually just does a braided soft line right to the center section. I think a blanket likely helps the heat stay away from the coolant/oil "soft" lines which is good but at the expense of trapping more heat in the turbine housing. |
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