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Batteries must be 18.0-28.0 lbs.

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#1
Mark McCallister

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While I'm quoting FastTracks, since that Prelims thread went down a track-width rabbit hole, note that the October FastTrack puts in a new specification for battery weights instead of just being "similar" to OEM (whatever that was) :

 

Batteries shall weigh 18.0-28.0 lbs.

 

Also new piston maximum diameters which I'm sure is exciting to the engine builders.

 

-Mark

 

 


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#2
mglobe

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In the days when lightweight batteries were expensive this made a lot of sense.  Not sure I understand why the limitation now.  You can get very light batteries for the same price as stock weights.  Comments?



#3
Todd Lamb

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It's not a limitation. We've just defined "similar" based on a number of common replacement batteries we measured. Hard to tech to the word "similar".


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#4
Jim Drago

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In the days when lightweight batteries were expensive this made a lot of sense.  Not sure I understand why the limitation now.  You can get very light batteries for the same price as stock weights.  Comments?

Just because we can, why do we need to?  IMO, defining a weight as they did is a good idea and hurts no one. If you want to get the most of the rule, use an 18lb battery.  If not particularly worried about it, put a stock battery in it and forget it. 


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#5
mglobe

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It's a cheap and easy way to drop some weight. In the NB's it doesn't matter that much I guess, but in a 1.6 or 1.8 the better eaters in the class may have issues making weight. Why not allow a lighter battery, particularly when it doesn't raise costs much if at all?

#6
Alberto

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This could be helpful.  My car/driver combo needs to lose a combined ~60lbs of weight to hit the min for a 1.6


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#7
Jim Drago

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It's a cheap and easy way to drop some weight. In the NB's it doesn't matter that much I guess, but in a 1.6 or 1.8 the better eaters in the class may have issues making weight. Why not allow a lighter battery, particularly when it doesn't raise costs much if at all?

My 99 is over as well. but thats all me :(

I just weighed a true mazda battery from these cars. It was just under 20 lbs

Jim 


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#8
chris haldeman

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I must have been thinking wrong. I was thinking the weights were too keep people from putting heavy batteries over the light tire? Appearently my old 24# battery box in my 1.6 was wrong :-)
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#9
Bench Racer

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Alberto, me 1.6 be 2020 lb with 1 gallon fuel and cool suite cooler with 2 gallon water. All set for a chubby vintage

driver. :rotfl:


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#10
Jim Drago

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I must have been thinking wrong. I was thinking the weights were too keep people from putting heavy batteries over the light tire? Appearently my old 24# battery box in my 1.6 was wrong :-)

If I had that luxory... thats what I would be doing


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#11
mglobe

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If I had that luxory... thats what I would be doing

Me too, and that's sort of my point.  Weight is a big deal in these cars.  Why not allow a very cost effective way for people to get 20lbs out of the car.  You can get a 1.5lb LIFEPO battery from Battery Tender that will work fine for $99.



#12
Bench Racer

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If I had that luxory... thats what I would be doing

On the other hand, The 20/20 by Dr. Phil.  :duck:


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