aerobod - near CYYC Posted May 21, 2021 Share Posted May 21, 2021 If there is an open hole instead of a vent pipe, I would put the battery on the bench and tip it on end at a 45 degree or greater angle with the vent hole down. At 45 degrees, that would simulate a 1g force from braking or cornering. If the vent is properly baffled or valved inside the battery, no acid should leak out, if any leaks out it would be best to use the pipe to channel acid down on to the road instead of on to the car structure. Link to comment Share on other sites More sharing options...
Guy Lowe Posted May 21, 2021 Share Posted May 21, 2021 Non technical reply, just a word of warning.When the weather was good I used to put a jacket in the passenger foot well of my X Flow. On one blat the regulator on the alternator failed and it fried the battery. Because I didn't have a vent pipe I no longer had a jacket or carpets. Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 21, 2021 Share Posted May 21, 2021 Yes, having seen the corrosion that battery acid can do, I'd rather have a vent pipe venting below the lower chassis tubes! Link to comment Share on other sites More sharing options...
StevehS3 Posted May 21, 2021 Share Posted May 21, 2021 Agree, it isn't uncommon to see a corroded battery tray. At £3.29 I would invest in one ;) Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 24, 2021 Share Posted May 24, 2021 Well, I just messaged our local battery business about a banner vent pipe and because I bought my banner battery from them I could have one for free :-)If anyone is ordering a new banner battery maybe ask if it comes with a vent pipe? Link to comment Share on other sites More sharing options...
John Vine Posted May 25, 2021 Share Posted May 25, 2021 I thought I'd get a second opinion, so I asked Tayna. They replied:The venting is related to the application it is fitted on and not the battery itself. Caterhams usually do not require the battery to be vented if they are already in a ventilated area.On that basis, I'm happy to continue without a vent pipe -- as I have done for the last 22 years!JV Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 25, 2021 Share Posted May 25, 2021 My kit came with one, which was discarded when I fitted a powervamp. Now back with a banner so have shoved a bit of tubing in and with replace with the official banner part!.If no signs of corrosion anywhere the probably fine without it. Link to comment Share on other sites More sharing options...
SM25T Posted May 25, 2021 Share Posted May 25, 2021 A friend had his Banner overcharge and boil the electrolyte .... it was a real mess without the vent pipe. It only takes one instance ... acid everywhere. Link to comment Share on other sites More sharing options...
John Vine Posted May 25, 2021 Share Posted May 25, 2021 Re #33:Now that is a very good point, Ian. Maybe I should think again....JV Link to comment Share on other sites More sharing options...
John Vine Posted May 30, 2021 Share Posted May 30, 2021 Re #34:Well, following Ian's comment I did think again. I bought this cheapo vent hose from Alpha Batteries. The elbow was slightly too big, so I had to ream out the battery vent hole to 6.5mm. My battery is in the "old" location directly behind the ECU, so I needed to extend the hose to 730mm (from 500mm) to reach down below the chassis.JV Link to comment Share on other sites More sharing options...
SM25T Posted May 30, 2021 Share Posted May 30, 2021 Wise move John Link to comment Share on other sites More sharing options...
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