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Old 02-24-2016, 02:16 PM   #661
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Quote:
Originally Posted by emilio700 View Post
Just an FYI, the OEM downpipe is considered part of the exhaust, not the header. So if you take exhaust points, you can include a nice mandrel bent 2.5" DP. If building a full custom exhaust then you can ignore the OEM flange locations and just build your midpipe directly to the header with a slip fit at the rear subframe. We left NASA before we could do A/B dynos with the custom DP but I would be surprised if it wasn't worth a few whp.
Orly? Well that could change my future plans(pending NASA ruling next year).


That +1 could be used to swap to a square-top manifold for a few more peak HP.
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Old 02-24-2016, 09:27 PM   #662
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Honestly, I'd not touch anything in the engine if you're building the car now. Get the chassis set up with a stock sway setup and wait to see what the 2017 rule book has.
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Old 02-24-2016, 10:36 PM   #663
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Originally Posted by FatKao View Post
Honestly, I'd not touch anything in the engine if you're building the car now. Get the chassis set up with a stock sway setup and wait to see what the 2017 rule book has.
This is probably the most sound advice for anyone building up a car right now.
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Old 02-24-2016, 11:12 PM   #664
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Yep
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Old 02-24-2016, 11:27 PM   #665
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That's what I'm doing!
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Old 02-25-2016, 10:51 AM   #666
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Is there a list of PT/TT track records anywhere?
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Old 02-25-2016, 11:01 AM   #667
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Is there a list of PT/TT track records anywhere?
NASA Time Trial

They're listed within the regions. Some records might not be updated recently, depends on the region I suppose.
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Old 02-25-2016, 11:02 AM   #668
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Quote:
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Is there a list of PT/TT track records anywhere?
There is no single spot for all NASA track records but individual regions keep track of records on their own.

For example, you can see NASA Great Lakes records here:

NASA Great Lakes - National Auto Sport Association
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Old 02-25-2016, 01:20 PM   #669
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My old classing vs. new classing after switching to e85. I made a little more power than I wanted but oh well.

Going off of the changes made to Appendix C to make these relevant to this year.

PTE Base: 128whp at 2395lbs (18.71lbs/hp)

PTE* Base: 136whp at 2430lbs (17.87lbs/hp)

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Adventures in PTE/TTE-dyno_zpsu7vqobqj.jpg  
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Old 02-25-2016, 01:25 PM   #670
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Was E85 the only change between those two runs?
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Old 02-25-2016, 01:34 PM   #671
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Was E85 the only change between those two runs?
Flywheel/Clutch
Injectors
Changed to different catback for sound limit purposes but both are 2.25" mandrel bent.

All the information and a dynapack before/after are in my build thread.
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Old 02-28-2016, 08:42 PM   #672
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Aftermarket sway bar endlinks a points item? stock sways.
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Old 02-28-2016, 09:30 PM   #673
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Quote:
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Aftermarket sway bar endlinks a points item? stock sways.
Is this a question? Would you be willing to spend a bit extra to purchase a verb?
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Old 02-28-2016, 10:22 PM   #674
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Aftermarket sway bar endlinks a points item? stock sways.
"7) Add, replace, remove, or modify anti-roll bars (“sway” bars—front, rear, or both) or end
links—may have spherical joints on the end links and/or relocation of the mounting points without additional points assessment +2"


replace, remove, or modify end links: +2
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Old 02-29-2016, 11:46 AM   #675
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What does everyone do for kill switches?

2 post vs 4 post?
Where did you mount it?
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Old 02-29-2016, 01:12 PM   #676
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4 post.

Big post kills positive battery cable coming from the back of the car, small post kills ECU power so I don't have to mess with alternator stuff. ECU shuts off, car shuts off, and when alternator stops spinning nothing has power anymore.

Mine is mounted near the forward corner opening of the driver side window. I can reach it and it's clearly visible and accessible from outside. Pictures are in my build thread.
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Old 02-29-2016, 02:04 PM   #677
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I did a 2 post in the link below. worked just fine and confirmed to shut off all power, both from head tech official and regional director. a few good posts in there that simplify install. if you do do this, be sure to cover all engine connections. I used liquid electrical tape.

Spec Miata Community: 2-Pole Master Switch?


as far as mounting goes, its up to you where to mount it but ideally you will want it somewhere easily accessible from the outside in case a safety worker needs to shut it off if you forgot too. mine is by my right hand and also by the fire pull handle.
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Old 02-29-2016, 03:58 PM   #678
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4-pole from Miatacage for me. After being intimidated thinking about playing with wires in my car, I spent less time actually installing the kill switch than I did reading the dozens of threads out there about it (meaning you can't go wrong if you read 'em all).

I have mine mounted at the intersection of the main hoop and harness cross-bar, passenger side. Battery is still located in trunk. I can turn it off while strapped in tightly and it is only a couple of inches from where the passenger window would be so the outside world can get to it if need be.
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Old 02-29-2016, 04:24 PM   #679
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We only use the high capacity 4 pole from Longacre. We have had a few of the standard hi-lp cap switches die when running alternator current through them.

Longacre Battery Disconnect Switch 45782

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Old 02-29-2016, 04:43 PM   #680
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2 post with the alt and battery on the same post just like the SM guys that way you avoid running the alt current through them. I bought a 4-post the first time and have no need for the second pair of posts. I just bought a 2-post Longacre for the new car
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