Cranking Amps Requirement?
03-25-2012, 10:09 PM
#1
Cranking Amps Requirement? What's the minimum RECOMMENDED cranking amps for a street head/cam LS1?
Application:
I'm doing an LS1/T56 swap into a Z4 and want to get the smallest/lightest battery I can get away with for daily use. I understand that smaller batteries means no running accessories while engine off (radio/power top/windows/etc.) and I'm fine with that. I just need enough power to reliably crank the engine over.
The factory BMW sized Bosch battery says:
Group Size: 48
CCA @ 0degree F: 690
CA @ 32degree F: 850
RC mins @ 25Amps: 110
I found this on corvetteforum.com:
Odyssey makes a PC680 (actually large motorcycle battery) which is rated at:
Odyssey also makes a PC925 which is rated at:
Trying to cut weight and save space in the trunk.
Thanks,
Chris
Application:
I'm doing an LS1/T56 swap into a Z4 and want to get the smallest/lightest battery I can get away with for daily use. I understand that smaller batteries means no running accessories while engine off (radio/power top/windows/etc.) and I'm fine with that. I just need enough power to reliably crank the engine over.
The factory BMW sized Bosch battery says:
Group Size: 48
CCA @ 0degree F: 690
CA @ 32degree F: 850
RC mins @ 25Amps: 110
I found this on corvetteforum.com:
Odyssey makes a PC680 (actually large motorcycle battery) which is rated at:
Code:
680 cranking amps for 5 seconds 595 cranking amps for 10 seconds 525 cranking amps for 20 seconds Short circuit current over 1800A 17Ah 25 minute reserve capacity with 25amp load
Code:
925 cranking amps for 5 seconds 870 cranking amps for 10 seconds 765 cranking amps for 20 seconds 675 cranking amps for 30 seconds Short circuit current over 2400A 28Ah 52 minute reserve capacity with 25amp load
Thanks,
Chris
Last edited by 2001CamaroGuy; 03-25-2012 at 10:29 PM.
03-25-2012, 10:39 PM
#2
Well, found some interesting info: http://www.thunderracing.com/shop-by...ics/Batteries/
So Thunder Racing is using the PC680T in F-bodies, which says it should work just fine. The car never sees below mid 40degrees F in the "dead of winter" out here (AZ).
Any input would still be nice.
So Thunder Racing is using the PC680T in F-bodies, which says it should work just fine. The car never sees below mid 40degrees F in the "dead of winter" out here (AZ).
Any input would still be nice.
