Quote:
Quote:
It's not just the alternator output that will "be enough". It's also the reserve of the battery and the health of your whole charging system- especially the wiring- double especially if you're not sure of the condition of your bulkhead connector, dash harness, ammeter, and engine harness.
I have all of that in good shape, and a trunk mounted group 31 truck battery for PLENTY of reserve. I have no problems. My ammeter (new autometer) hardly budges when I flick the switch. About the same if the headlights are on.
As far as trimming, I'd say you can take about .5 inch off evenly around the housing without the fan hitting the core. That is up to you. With my radiator package, I needed about 4.5 inches.
True hot rodding at play here! 
Where do you think the power for the fan should be taken from? The battery? If so, bad choice
alternator output stud.
The battery is a good place to tap for relay power, but as feets said, you need to have a good distribution place. When I relocated my battery, I put a stud on a mounting strip I made for my relays where the battery used to be. I power the car from there as if it were the batt post. As far as fan ckt protection, I am holding with just a 30A fuse. It hasn't blown. I looked at info I could get on cars with similar fans, and I see 40A, so that's prolly conservative.
The idea of using the HHR fan is being on a budget, and not just calling summit and getting the $600 combo. I think the job gets done nicely.
Last edited by WayneM; 05/29/10 11:49 AM.
2014 Durango R/T
2004 Dodge Ram 3500 SRW SLT short quad Cummins 6 speed
1998 Dodge Durango SLT 5.2
1971 Plymouth Duster-
<<<<<MOPAR SPOKEN HERE>>>>>
| 
