Battery Size - Diesel Forum -
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 22 (permalink) Old 05-11-2011, 03:05 AM Thread Starter
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Battery Size

My 93 IDI turbo needs a couple new batteries, but I'm not sure what size I need, can anyone help me out? Also, what's a good brand of batteries that aren't too expensive.

- 1993 F250 XLT 7.3 IDI Turbo -
- 1995 F150 XLT 5.0 EFI -
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post #2 of 22 (permalink) Old 05-11-2011, 07:45 AM
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The minimum is 850CCA each.... changed in pairs....... Wally mart has 1000CCA which members use. I only use Ford batteries and get about 5+ years out of a pair. Ford's are more expensive, but I need "reliable" up here in cold country.

93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93

Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.

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post #3 of 22 (permalink) Old 05-11-2011, 10:40 PM
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I put 2 group 31's (truck batteries) in mine. 1125 cca each,They have been in for 6 years now with 0 failures. They just fit in the battery trays, and just clear the hood.

1993 F-250 XLT 4X4 7.3 nat asp. Banks turbo installed 02/13/05, straight piped, 5 speed, 4.10 gears 235/85R16 stock wheels
1990 F-150 4X4 302 5 speed
1976 CJ7 4X4 258 3 speed
1995 Grand Cherokee 4x4 4.0 litre
1990 K-2500 GMC 4X4 350 Auto
1979 F-150 4x2 300/6 4speed 4bbl dual headers/exhaust

1986 Vacationeer 23' Fifth Wheel
2005 Gooseneck(brand) 4 horse gooseneck stock trailer

1941 Allis Chalmers C Ser# C541
1948 Allis Chalmers C wide front
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post #4 of 22 (permalink) Old 05-12-2011, 11:15 AM
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optima batteries are nice but are spendy. i just use those 1000CCA kirkland batteries from costco and get about 5 years out of them.


1991 CC f350 5spd 4x4. 3:55
1993 f-superduty 7.3/e4od dana 80
1988 f-250 xl 7.3/c6 4x4 3:55
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post #5 of 22 (permalink) Old 05-13-2011, 01:22 AM
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The trays and hardware are sized for a group 65. Use 850 CCA or higher for proper cranking performance.

'89 F250 2WD XLT Lariat Supercab,
7.3 IDI, C6, 10.25" 3:55, dump bed.

Mods: Gear Vendors overdrive, ATS 085/088
"Frankenturbo", boost and EGT gauges in pod,
K&N air filter, cold air intake, filter minder, rear
work lights, 'monback beeper, pintle+ball hitch,
brake controller, CB.

Wish list: 130 amp G3 alternator, front hitch,
new hood, fresh paint.
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post #6 of 22 (permalink) Old 05-13-2011, 03:28 PM
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Group 31 batteries are great, but I had to modify my battery trays to get them to fit. I don't think that the old IDI ever turned so fast at startup until they were put in.

'94 F350 4x4 Crew 24V w/ HE351VGT 6spd & NV271 4.10's. Working on swapping in 10.5" Sterling Rear Axle.
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post #7 of 22 (permalink) Old 05-14-2011, 01:51 AM
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I use two Optima Red Tops that have been incredible in terms of reserve capacity.

I left lights and accsessories on and still fired right up many hours later no sweat in cold weather.

When I installed my new IP, lift pump, fuel filter and aftermarket inline filter all at the same time; there was a LOT of air in the system and it took a lot of cranking to get it out but the batteries never gave up!!!

1984 F-250 6.9, T-19, BW1345, BB code injectors, low mileage, manual Beru Glow Plugs, D70 rear end. solid truck.

1985 Toyota Landcruiser BJ60, 5 bearing cam 3B 4cyl diesel, H55F trans. Best rig I have ever owned.

1981 Honda Trail 110.
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post #8 of 22 (permalink) Old 05-14-2011, 02:54 PM
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im running 2 975 cca's and have no problems, got them from the local farm supply store

1993 F350 7.3 IDI S/C L/B SWR W.B. 133
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post #9 of 22 (permalink) Old 05-14-2011, 05:06 PM
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Ford Batteries

I have to agree with CDNSARGUY with the use of Ford batteries. I have an E 350 SuperDuty and as a result I am limited to a "Ford Only" battery on the passenger side in fornt of the heater fan box.

I have hunted high and low, but only OEM Ford batteries will fit. Beyond that I have never ever had a starting issue with my Ford batteries in a little over 5 years.

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post #10 of 22 (permalink) Old 05-16-2011, 10:22 PM
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whats your opnion on the diehard platnuim batteries?? 930CCA

93 F250 7.3 IDI non turbo Auto 2WD
Turned up 1/4 turn
79 Ford Courier 2.3 5 Speed 2WD
Blacked out with stacks
06 Mazda RX-8 1.3L Rotary Auto 6 Speed
New engine, 19s, CF Hood, Custom Sound, Greddy Exhaust System, ect.
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post #11 of 22 (permalink) Old 05-18-2011, 12:12 AM
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I went to Farm and Fleet and bought the Platinum battery that fit my truck. There's a little computer thingy that looks up the proper battery for your truck. I get all my batteries at farm and fleet, even though my Dad carries Interstate batteries at his shop.

1993 F250 supercab longbed 4x4 with a quarter of a million miles. Stock 7.3, e40d trans and 3.55 rear gears. I got rid of my silly 6" exhaust stack in the bed and installed a thrush turbo w/side dump exhaust. The thrush gave it a little too much hush. Pro comp 6" suspension lift. Got a Meyer 7.5 foot snow plow, a flipper style gooseneck hitch, a cushion ride tag hitch and a 21,000lb fifth wheel hitch.
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post #12 of 22 (permalink) Old 06-01-2013, 11:20 AM
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those batteries are the worst you can get. they die hard and fast
Originally Posted by xtreme velocity View Post
whats your opnion on the diehard platnuim batteries?? 930CCA
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post #13 of 22 (permalink) Old 06-01-2013, 01:42 PM
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those batteries are the worst you can get. they die hard and fast
And that statement is based on what authority?? Anyone who's actually in the auto/truck industry rates them as one of the best out there.

Heavy truck and diesel mechanic (thankfully retired after 30+ yrs)
'91 F-250 SC 4X4, 5spd. ATS Turbo, 3:55 diff.
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post #14 of 22 (permalink) Old 06-01-2013, 02:22 PM
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Originally Posted by idipowerbiggt78 View Post
those batteries are the worst you can get. they die hard and fast
NOT!! Had one in my '86 F250, that I installed in 1997. It was still holding charge and starting my 460 in 2008 when I donated the truck to community hospice.

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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
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post #15 of 22 (permalink) Old 06-03-2013, 11:46 AM
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1 post to slag a battery with a seemingly goods rep? He's probably a competitor or really screwed up and killed the battery them self.

New truck: 1988 F-350 1 ton dualy 2*4, 7.3L IDI Naturally Aspirated, Dual tanks with Camper package.
Mods: Enhanced gauge cluster; Transmission temp, rear diff temp, coolant system pressure, Vacuum pressure, Fuel pressure, Crappy tire Air horn Kit, Raycor pre filter/water sep. All LED Dash lighting, Parker LFS tranny filter, super duty tranny cooler, gerret turbo, waste gated (pending).
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