Start Battery has Spacer Plates! ...options?

[david horowitz]

My engine start battery in my 75 Avion is dead and this will be my 1st time changing it. I found that it has both on the top, and the bottom a
plastic spacer to allow it to fill the same height as the front house battery so that the battery mount top strap sits level over both batteries.

The one I pulled out is labeled 34/78. I see from this chart: http://www.batteryweb.com/bci.cfm that it is 7.9" tall. Also see that various
batteries in the group 24 and 25 range have the same footprint but are taller, negating the need for the plastic spacer(s). I know this a very noob
question, but thought I'd post none the less.

Is there any reason to stick with the 34/78 with spacers? Would a taller battery be preferred? How many CCA's are considered optimal?I am in CA and
expect to rarely be in low temperature environments. It occurs to me that since there is the 'House' battery there with it's boost switch that the
lowest (smallest) adequate CCA battery would be fine? Note I only need the top mount terminals.

I have only O'riley and NAPA locally.
Thank you for your input!

Cheers,
Dave
--
David del Rio - 75 Avion - Raymond, CA

 

[wayne rogewski]

Get the largest CCA battery that will fit, Either with or without the spacers. As this is the engine start battery the more CCAs the better.
--
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan

 

[d c *mac* macdonald]

I use a 34/78 in my 1999 GMC 2500 pickup truck. Truck came with side terminal battery, but with my ham equipment, I used the top terminals for my radio gear. Very handy if you have ANY accessories you want to have powered at all times.

I just put in a single Group 55 battery to replace the two dead start batteries that came with the coach.

D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com

________________________________
From: Gmclist on behalf of David Horowitz
Sent: Monday, August 14, 2017 11:02
To: gmclist
Subject: [GMCnet] Start Battery has Spacer Plates! ...options?

My engine start battery in my 75 Avion is dead and this will be my 1st time changing it. I found that it has both on the top, and the bottom a
plastic spacer to allow it to fill the same height as the front house battery so that the battery mount top strap sits level over both batteries.

The one I pulled out is labeled 34/78. I see from this chart: http://www.batteryweb.com/bci.cfm that it is 7.9" tall. Also see that various
BCI Group Numbers, Dimensional Specifications, Polarity ...http://www.batteryweb.com/bci.cfm
www.batteryweb.com
BCI Battery Group Sizes, Dimensional Specifications, Polarity and Terminals

batteries in the group 24 and 25 range have the same footprint but are taller, negating the need for the plastic spacer(s). I know this a very noob
question, but thought I'd post none the less.

Is there any reason to stick with the 34/78 with spacers? Would a taller battery be preferred? How many CCA's are considered optimal?I am in CA and
expect to rarely be in low temperature environments. It occurs to me that since there is the 'House' battery there with it's boost switch that the
lowest (smallest) adequate CCA battery would be fine? Note I only need the top mount terminals.

I have only O'riley and NAPA locally.
Thank you for your input!

Cheers,
Dave
--
David del Rio - 75 Avion - Raymond, CA

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[john r. lebetski]

A Group 78 is what you want for a 77. The premuim versions are usually around 900 CCA. This is side terminal only for a stock coach that has not been
POed
--
John Lebetski
Woodstock, IL
77 Eleganza II