Where to remove weight from a track only car? - Page 17 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 09-28-2015, 09:35 PM   #321
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Quote:
Originally Posted by joyrider View Post
So who gor rid of the whole trunk floor ? Did you add some aero work while doing it ?
I did it on my 99 to install an a/c condenser. I could weight the piece I cut out if needed still.
patsmx5 is offline   Reply With Quote
Old 09-29-2015, 05:22 PM   #322
Junior Member
 
Join Date: Mar 2010
Location: Durham, NC
Posts: 409
Total Cats: 19
Default

Quote:
Originally Posted by proctorsilex View Post

I wanted to get a lithium battery until I spoke with a Miata racer in COMSCC (summer 2015) who said that his caught ablaze. The fire crew just filled his trunk with water and waited for it to burn out. No serious damage, but he is back to lead. I am not saying it will, but I have not heard of lead on fire.
This is from another forum, but related.

Quote:
Alright, I'm going to do something I rarely do now and **** all over a specific brand of aftermarket automotive component. Mostly because the level of ignorance and/or disregard for customers displayed in this product is... shocking.

I should note this is my personal opinion, and in no way connected with my employer.

Braille Batteries - **** you.

We start with our patient, a Braille ML7 family lithium ion racing battery which has failed: (I have four or five of these sitting here failed, ordered over the course of several years. This is not an isolated example.)


Since it's junk anyways and the engine manufacturer prohibits the use of lithium ion batteries unless they contain a charge balancing circuit I might as well find out why my $400 racing battery failed, right? Time to void that long-expired warranty and crack this sucker open.

Oh.
(Yes, the filament tape was cut by me.)
I'm seeing a lot of hamfuckery going on in here...

The vent is installed using what appears to be large gobs of gel cyanoacrylate. They didn't even get full coverage, there are gaps in a few spots.


Oh dear. :stare:

The terminal wires appear to have been soldered by me when I was nine. That looks remarkably like filament tape someone bought at the post office and electrical tape purchased at home depot, as well.
And what the **** is up with a 6ga wire in parallel with a 12ga wire? Just use the right size in the first place.

:wtf:

The nickel terminal strips seem to have been cut with a set of rescue scissors and a loose idea of what size they need to be rather than any sort of machine or die. The terminal spotwelding appears to have been done by a drunk or someone suffering from Parkinsons and the holes "drilled" (I'm being rather generous here) in them for positive terminal alignment appear as if they were chewed out by a rabid badger.

Other end of the pack.

Wait a minute, is that a logo I recognize?

Yes it is.

Southwire THHN. Excellent wire for home/commercial building plant wiring, not so much for a ******* race battery.

One wrap of filament tape holding the whole shebang together before it gets jammed into the case.


And most importantly - ZERO evidence of any sort of charge balancing/management hardware. None. Zero. Zilch. Nada. Not only that, there are no inter-cell taps connected to a small charge balancing controller connector on the outside of the case, either. You can't do that with lithium batteries. They MUST be charge balanced regularly. If you don't, one set of cells will fully discharge and become impossible to recharge and/or present a fire risk. Every reputable manufacturer of lithium batteries for motorsport either builds one into their pack or provides a connector to which one can be attached occasionally to rebalance the cells before any dip below minimum charge.

The best part? Braille states that for optimal battery lifetime you should regularly use their charge balancing unit. Which is nice and all, but it connects to the same two external connectors any other charger does, and doesn't have access to the inter-cell taps since they didn't wire any such thing up, so it's physically impossible for it to determine if the cells are unbalanced, nevermind balancing them. Pure snake oil.

Even the guy in Florida home-building his battery housings from clear plexiglas and selling them from a website that looks like it belongs in 1993 on Geocities knows enough to build better battery packs than this. I'm disgusted - by Braille, not the other guy, he seems to have gotten the electronics right if not the packaging.

Cell pair voltages for this pack at present, positive to negative: 3.656V, 3.662V, 3.710V, 0.291V. One of these things is not like the others! (I wonder which pair of cells failed...)

Guess what? The best condition pack I had left caught ******* fire today. Wish I had pictures of it for effect, but it was basically unrecognizable and got whipped into a dumpster and vigorously assaulted with a garden hose and is now gone.

Buy better lithium batteries that either explicitly state they contain a charge balancing circuit or have an external connector for one - unless you want to risk a fire and experience vastly reduced starting battery lifetime. Then, Braille batteries are right for you! :thumbsup:
He posted the pictures on their Facebook and they confirmed that that was an actual PRODUCTION battery from an earlier revision. There is some terrifying stuff out there.
Attached Thumbnails
Where to remove weight from a track only car?-njxyxd6l.jpg   Where to remove weight from a track only car?-oldlciil.jpg   Where to remove weight from a track only car?-oymvvxbl.jpg   Where to remove weight from a track only car?-qo27ecvl.jpg   Where to remove weight from a track only car?-5deuuetl.jpg  

Where to remove weight from a track only car?-tuerjofl.jpg   Where to remove weight from a track only car?-ov6ijrul.jpg   Where to remove weight from a track only car?-9bech5fl.jpg  
FatKao is offline   Reply With Quote
Old 09-29-2015, 06:43 PM   #323
Newb
 
Join Date: Sep 2015
Posts: 1
Total Cats: 0
Default

thank you for posting that, I was considering a Braille....not anymore.
Great thread. I have another way to remove a lot of weight, common around here.
Park car outside during winter, preferably in a water-logged field.
Following summer, remove all the rust - voila! Lighter car.

On a more serious note - someone asked a while back about 1 piece fibreglass front ends. Does anyone know of a source?
R26B is offline   Reply With Quote
Old 09-29-2015, 09:06 PM   #324
Senior Member
iTrader: (1)
 
Join Date: Jul 2012
Location: durham NC
Posts: 767
Total Cats: 115
Default

Did braille delete the post from facebook? I remember seeing it a few months ago but now I can't find it.
asmasm is offline   Reply With Quote
Old 09-29-2015, 09:32 PM   #325
Senior Member
iTrader: (1)
 
Join Date: Jul 2012
Location: durham NC
Posts: 767
Total Cats: 115
Default

Back to the discussion of headlight conversions- I am planning to pick up some cheap ebay clear lenses for the front turn signal/DRL, separate the back of the housing and then mount two of these per side:
10W 2.6" Scalable Mono-LED Pods - Lang Racing Development
Thoughts on beam angle? Lang racing also has these:
10W Compact Long Range LED Pod - Lang Racing Development

Not sure exactly what light would be best for my application.

I am also looking around for a very small weather sealed LED turn signal I can cram in there. Maybe a motorcycle application.
asmasm is offline   Reply With Quote
Old 09-29-2015, 10:37 PM   #326
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,313
Total Cats: 1,335
Default

Quote:
Originally Posted by FatKao View Post
This is from another forum, but related.



He posted the pictures on their Facebook and they confirmed that that was an actual PRODUCTION battery from an earlier revision. There is some terrifying stuff out there.
I briefly considered becoming a Braille dealer when the company was first announced. Did some research and asked a few pointed questions. Discovered they were rebadged powersports batteries with roughly 150% markup. No thanks.

Was appalled, but not surprised to see the grassroots and pro racing community falling all over themselves to buy them. Some of my direct competitors taking up the banner. Big money sponsorships indicating Braiile was making some serious coin with products and marketing I personally found highly questionable.
emilio700 is offline   Reply With Quote
Old 09-29-2015, 10:57 PM   #327
Junior Member
 
Join Date: Mar 2010
Location: Durham, NC
Posts: 409
Total Cats: 19
Default

Quote:
Originally Posted by asmasm View Post
Did braille delete the post from facebook? I remember seeing it a few months ago but now I can't find it.
They did. I was going to link to that since it had them confirming that was one of their batteries.
FatKao is offline   Reply With Quote
Old 10-01-2015, 05:56 PM   #328
Newb
 
Join Date: Apr 2010
Posts: 4
Total Cats: 0
Default

I forgot to mention along with the lithium battery post: Supercap battery replacement. That should be comparable to lithium or lighter. They are supposed to hold a charge over days and weeks, but I think they would need a charge after a winter. I think the main issue would be a big chance of electrical fire should the main cable or terminals get shorted (capacitors dump their charge FAST). Price is comparable to lithium last time I checked.
proctorsilex is offline   Reply With Quote
Old 10-03-2015, 01:53 PM   #329
d k
Junior Member
iTrader: (4)
 
Join Date: Feb 2011
Posts: 257
Total Cats: -1
Default

There is a company called earth x - I believe, who came out on top of a pretty comprehensive independent test a while back.

Hopefully I will find the link somewhere.
d k is offline   Reply With Quote
Old 10-04-2015, 04:47 PM   #330
Junior Member
iTrader: (1)
 
Join Date: Jul 2011
Location: Grand Rapids, MI
Posts: 201
Total Cats: 37
Default

These would definitely fit into the turn signal area...

Bi-xenon: Morimoto Matchbox 2.0 - HID Projectors from The Retrofit Source
mx592 is offline   Reply With Quote
Old 10-04-2015, 08:45 PM   #331
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,997
Total Cats: 1,463
Default

I'm going to get those and try and mold them into eBay clear or smoked turn signals.
aidandj is offline   Reply With Quote
Old 10-04-2015, 08:52 PM   #332
Senior Member
iTrader: (1)
 
Join Date: Jul 2012
Location: durham NC
Posts: 767
Total Cats: 115
Default

If you want to go with halogen these have been used in the past:
Hella 60mm Projector Headlamp Module | Rally Lights

I want to do LED lights for the lower electrical load.
asmasm is offline   Reply With Quote
Old 10-04-2015, 11:33 PM   #333
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 699
Total Cats: 50
Default

I have a set of these that I never used if anyone wants to give them a shot. They're just a hair too big to fit through the turn signal opening on the NA, but you could make it work. I'll let them go cheap. PM me if you want them.

Headlights Destination SSM
jpreston is offline   Reply With Quote
Old 10-05-2015, 06:03 PM   #334
Junior Member
 
Join Date: Sep 2007
Posts: 68
Total Cats: 0
Default

Quote:
Originally Posted by emilio700 View Post
I briefly considered becoming a Braille dealer ... Discovered they were rebadged powersports batteries with roughly 150% markup. ... Some of my direct competitors taking up the banner.
I've been using a Deka ETX14L for the past few years without much problem. Purchased for $50 to replace the identical but 3x as expensive 13month old Braille battery I purchased from a company located here in Colorado. Thankfully they don't sell Braille anymore.

As an aside, thanks for not selling crap. There's a reason I prefer to order from California than from my state, Colorado.

Last edited by arbinshire; 10-05-2015 at 07:12 PM.
arbinshire is offline   Reply With Quote
Old 10-05-2015, 07:36 PM   #335
Supporting Vendor
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 491
Total Cats: 39
Default

Quote:
Originally Posted by asmasm View Post
If you want to go with halogen these have been used in the past:
Hella 60mm Projector Headlamp Module | Rally Lights

I want to do LED lights for the lower electrical load.
I have been running LED lights for most of the year and I'd do it again if I had the choice. Cost wise, with Amazon, it is dirt cheap and they have much lower load on the electrical system. Overall light output is close to stock with these...but the weight savings is worth it.



I also used some eBay clear turn signals for a lens.

[/QUOTE]
Attached Thumbnails
Where to remove weight from a track only car?-16934609287_6534061255_b.jpg   Where to remove weight from a track only car?-16955819789_c1fe884cc4_b.jpg   Where to remove weight from a track only car?-16954235228_d4e9ce6ed9_b.jpg  
Lincoln Logs is offline   Reply With Quote
Old 10-05-2015, 07:59 PM   #336
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,997
Total Cats: 1,463
Default

Quote:
Originally Posted by Lincoln Logs View Post
Overall light output is close to stock with these...
Only reason I haven't done this yet. I just drove to MRLS and back from Portland. And probably 6 or 7 hours of it was dark, some of it was dark coastal roads. I need comparable or better light output.

Current plan is to take one of the new small projectors listed above, and retrofit it into the turn signal housing. Bumper marker light will be new turn signal.
aidandj is offline   Reply With Quote
Old 10-06-2015, 12:50 AM   #337
Junior Member
iTrader: (1)
 
Join Date: Apr 2012
Posts: 187
Total Cats: 3
Default

Even with the smaller projector above, you probably will need to cut some of the metal out of that area.
motormechanic is offline   Reply With Quote
Old 10-06-2015, 09:56 AM   #338
Senior Member
iTrader: (1)
 
Join Date: Jul 2012
Location: durham NC
Posts: 767
Total Cats: 115
Default

Quote:
Originally Posted by Lincoln Logs View Post
I have been running LED lights for most of the year and I'd do it again if I had the choice. Cost wise, with Amazon, it is dirt cheap and they have much lower load on the electrical system. Overall light output is close to stock with these...but the weight savings is worth it.


I also used some eBay clear turn signals for a lens.

That looks great- I want to implement some kind of high beam/low beam function on my setup to make passing inspections easier.
asmasm is offline   Reply With Quote
Old 10-07-2015, 08:24 AM   #339
Junior Member
iTrader: (5)
 
Join Date: Oct 2014
Posts: 473
Total Cats: 23
Default

Quote:
Originally Posted by Lincoln Logs View Post
I have been running LED lights...
What are you using for the turn signal?
90civichhb is offline   Reply With Quote
Old 10-07-2015, 10:06 AM   #340
Junior Member
iTrader: (1)
 
Join Date: Apr 2012
Posts: 187
Total Cats: 3
Default

Quote:
Originally Posted by 90civichhb View Post
What are you using for the turn signal?
I believe he is running some motorcycle turn signals bolted down next to the LEDs.
motormechanic is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
91 1.6l turbo complete part out. Tony the Tiger Miata parts for sale/trade 63 12-29-2016 03:23 AM
Prepping my '95 for track asmasm Build Threads 82 05-26-2016 05:37 PM
Turbo 1995 Miata Low mileage Clean Tekel Cars for sale/trade 29 02-05-2016 05:16 PM
Stripped clutch slave bell housing threads. EricJ Suspension, Brakes, Drivetrain 6 09-13-2015 10:44 PM
WTB parts for HPDE car Voltwings WTB 5 09-11-2015 09:23 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 06:43 AM.