I don't know the actual dimensions, but according to Exide's battery catalog, 1g's OEM battery is a Group 86.

 

cool,thanks gonzo, i don't know where i got group 24 from oh well

 

An can tell you for a fact that an Optima D34/78 will fit in the front for sure. I had one in there for a long time. Get the yellow top.

 

cool,thanks rippin,how many cca's is the d34/78 is it 780cca? Thanks again

 

Yup, I'm pretty sure that's correct. Try www.remybattery.com for good pricing.

 

watch the clearance at the top!

When installing bigger batteries in a 1G, you can remove the plastic battery box to get more room.

But be very careful of the top positive terminal -- depending on the battery terminal you use, it might hit the hood and short out.

Batteries must also be firmly bolted down. If you can't use the stock bracket, make a new one.

Also be careful of the battery hold down screw on the fender side of the bracket --it strips very easily.

Exide Orbital fits in 1Gs and has better specs than Optima red-top. The yellow-top has less cranking amps but can withstand deeper discharges with minimal damage.

Cheers,
Mark
PhillyDSM.com

 

Re: watch the clearance at the top!

When installing bigger batteries in a 1G, you can remove the plastic battery box to get more room.

But be very careful of the top positive terminal -- depending on the battery terminal you use, it might hit the hood and short out.

Batteries must also be firmly bolted down. If you can't use the stock bracket, make a new one.

Also be careful of the battery hold down screw on the fender side of the bracket --it strips very easily.

Exide Orbital fits in 1Gs and has better specs than Optima red-top. The yellow-top has less cranking amps but can withstand deeper discharges with minimal damage.

Cheers,
Mark
PhillyDSM.com

I never had mine firmly bolted down under the hood. Where is it gonna go? It's an Optima which can take over 18 times the vibration load of a regular lead acid battery and it cannot spill period because it's sealed. Doesn't matter for me anymore anyway because I now have an Optima D31T in the back and no battery in the front at all.