Pretty good numbers on an FM2/MS - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 10-18-2014, 09:37 AM   #21
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Atlanta Dragway is going to be open Friday, October 24 and Friday, November 7. We should try to shoot for one of those.
Ben is offline   Reply With Quote
Old 10-18-2014, 08:16 PM   #22
Junior Member
 
Join Date: Feb 2014
Location: Chicago, IL
Posts: 95
Total Cats: 1
Default

Jeeeeeeeeeesus. This is amazing...
AdrianD2 is offline   Reply With Quote
Old 10-20-2014, 06:07 PM   #23
Junior Member
iTrader: (1)
 
Join Date: Aug 2008
Location: Austin, TX
Posts: 239
Total Cats: 4
Default

Quote:
Originally Posted by codrus View Post
Looks like the lack of muffler and cat really wakes the 2560 up!

How loud is it?

--Ian
My XP car is now mufflerless. Just 2.5" all the way back from the GT2560R to a turn down before the diff. Hasn't blown sound at events that care. Harris Hill is 85dB at the fence.
mcfandango is offline   Reply With Quote
Old 10-22-2014, 12:20 PM   #24
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Damn. That sumbitch sounds healthy!
concealer404 is offline   Reply With Quote
Old 10-24-2014, 11:52 AM   #25
Junior Member
iTrader: (1)
 
Join Date: Jun 2014
Location: Metro Detroit
Posts: 270
Total Cats: 26
Default

Lovely graphs, and fun video

Thanks for sharing. It's doing its job; makes me want to build an Exocet.
Ryephile is offline   Reply With Quote
Old 10-25-2014, 01:31 AM   #26
Newb
Thread Starter
 
Join Date: Dec 2011
Posts: 35
Total Cats: 9
Default

It's pretty easy.

dutchbag is offline   Reply With Quote
Old 10-26-2014, 11:26 PM   #27
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 1,707
Total Cats: 19
Default

This thing would probably be a low 12 high 11 sec car..
Stealth97 is offline   Reply With Quote
Old 10-30-2014, 02:13 PM   #28
Newb
 
Join Date: Aug 2013
Posts: 36
Total Cats: 5
Default

There is only one way to find out. I say throw a set of sticky tires on there and head to Atlanta Dragway on Nov 7!!!
SteadFast is offline   Reply With Quote
Old 10-30-2014, 02:30 PM   #29
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

It should definitely be stupid quick
18psi is offline   Reply With Quote
Old 10-30-2014, 05:19 PM   #30
Newb
 
Join Date: Dec 2011
Posts: 15
Total Cats: 0
Default

awesome numbers. pullin some serious tq
baystreetjdm is offline   Reply With Quote
Old 03-05-2015, 12:43 PM   #31
Newb
 
Join Date: Jul 2012
Posts: 33
Total Cats: -2
Default

Any news on the drag times? How is the bottom end holding up?
ASlickFinish is offline   Reply With Quote
Old 03-05-2015, 12:51 PM   #32
Newb
Thread Starter
 
Join Date: Dec 2011
Posts: 35
Total Cats: 9
Default

Bottom end got ventilated, but not how you think.

The owner of the car let someone drive that was unfamiliar with anti-lag and no-lift shift. And turbos. And mechanical empathy. And common sense. Said nameless individual drove the car a few laps around Roebling riding the clutch quite badly, engaging the anti-lag rev limit. Their decided course of action was to, well, ignore the pits, keep driving around the track with his foot flat in the throttle, cannons going off underneath the car, at a 3500 RPM rev-limit.

The #4 con rod decided it needed to escape its prison and travel the world. The piston was cracked, I'm guessing from multiple flame-front detonation from the insane temperatures that must have developed. The flywheel and pressure plate were also glazed.

I'm kinda butthurt about it, but the car has a new bottom end now. The head got lightly kissed, but not enough to replace any valves. Probably.
dutchbag is offline   Reply With Quote
Old 03-05-2015, 02:30 PM   #33
Newb
Thread Starter
 
Join Date: Dec 2011
Posts: 35
Total Cats: 9
Default

I've gotten two PMs asking about anti-lag blowing up their turbo cars, so I'll post my response here so the community can weigh in or correct me:

Your FM2 car is fine. Anti-lag is something you won't see on 99% of aftermarket turbo installs. They're usually not enabled on the tune or ECU, and for many management systems, it's a specific upgrade that you have to buy a code for.

Anti-lag can be used in three common instances. Launch control (pretty rare), upshift (very rare), off-throttle (during a rally stage only). It's really, really rough on cars, and it's only used when you consider your powertrain to be a consumable part.

Launch control functionality (in the scope of these aftermarket ECUs) is pretty much limited to keeping the engine revving at a consistent RPM so you can let out the clutch in a more repeatable manner. This is normally accomplished by cutting fuel and spark in the same manner as the redline rev limit. For turbo cars, it would be beneficial to launch with the turbo spooled up, which is where anti-lag comes into play.

Anti-lag is something you should research and understand before enabling on your car. Most implementations retard the spark so the combustion event continues into the exhaust stroke, which creates a ton of exhaust gas without making much power. This is useful to spool turbos while keeping at a pre-determined RPM. The downside is that it is very rough on engines, exhaust valves, turbos, manifolds, and exhaust systems. As such, it is used sparingly on racecars, and really has no purpose on street cars other than to be really obnoxious (which is fun sometimes).

No-lift antilag comes into play on upshifts. You clutch in, leave the throttle pinned, the engine drops to a pre-determined RPM, you shift into a higher gear, then let out the clutch. As the engine drops to that pre-determined RPM, it does the whole delayed-ignition thing, which spools up the turbo so you have as much boost as possible in the beginning of the next gear. This is what happened to XP-4, as the clutch was pushed in (switch engaged) and the driver didn't realize he was slipping the clutch in fifth gear. For multiple laps.

An anti-lag event is very violent and sounds like a gunshot. Here are a few examples in video form:

When you hear a gunshot between shifts (Renault at 1:11 is a good example), that's the no-lift upshift anti-lag.
dutchbag is offline   Reply With Quote
Old 03-05-2015, 02:43 PM   #34
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

I have spark cut launch control turned on and I have no clue how you wouldn't notice it, especially in an excocet, it sounds like you filled your exhaust with firecrackers.
aidandj is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:31 PM.