odurandina

i thought most P-car shops stock Interstate batteries. mine is a perfect fit and i abuse the hell out of it running my stereo and laptop with the car turned off from one side of creation to the other.

Hold On

[QUOTE=No HTwo O;8946726]Interstate would be a good choice. Other guys go to Wal Mart and AutoZone.

I have the MTP-91 in my Turbo.



This is the one that I have also. As you recall, we cooked the **** out of it last year on the way to Marble Falls. It still works like a champ. It also is a perfect fit in my battery well. Same battery that comes in some Jags and Range Rovers.

IXLR8

This list of group 48 and 91 batteries might be of use to some.

Also, this is what a Group 48 East Penn battery looks like.

deutschmick

I replaced OE battery in my GT3 about 2 years ago with an Interstate MTP 91. It's considerably lighter than the OE and seems to be holding up well.

My 928 battery (DieHard) is on it's last legs. I'm replacing it with an MTP 91 this afternoon. $103.83 out-the-door, with no core charge from a Quickie-lube type of place. I think I paid $94.95 for the GT3 battery from the same place previously.

danglerb

I don't see a vent tube, does it have one?

dr bob

"lighter" may be an advantage in a race car, but for normal cars it means "we cheaped out and didn't give you enough plates". With all the discusssion about the various labels we find on Johnson Controls batteries, we should tabulate the weights of the various flavors of Group 48. Heaviest label wins!

IXLR8

Yes, it has a vent hole on each side of the battery, if I remember. You insert the supplied elbow on the side of your choice and it comes with a plug to insert on the opposite side to block off that hole.

Erik N

Given the choice between an Interstate with 850CCA for $135 or a Napa with 675CCA for $83, which would you choose?

blown 87

I am a interstate dealer, and between those two, either will work just fine for you.

I went through about as many interstates as I did NAPA ones, 2 of each so far on my car.
I am trying a AGM battery this time and so far so good.

IXLR8

I'm assuming they both have the same L x W x H dimensions, or?

The 850 CCA battery will most likely have a lower internal resistance, so I would wonder what I'm giving up to get that...thinner plates? If so, that would provide a shorter battery life.

BTW, NAPA and many brand names do not make their own batteries.

Drewster67

I went with Duralast for my Mustang - POS battery didn't even last two years in the AZ heat. Luckily for me - warranty replaced it free (with another duralast)

For my track car - Walmart battery with a/c - fits perfect.

YMMV

Erik N

They are the same dimensions.

If I am reading your post right, you are saying that the more expensive battery with more CCA is actually a lower quality?

IXLR8

No, I did not say that. Shorter life does not mean lower quality if you are getting something else in return. In this case, more CCA. But if you don't need more CCA, why bother looking at that spec especially if your vehicle is a three season car.

I look for RC/Ah and most batteries of a given size are pretty well equal in that regard. RC is what got me home when my alternator belt went on me 110 miles away.

Fogey1

From that recent 4 page thread I posted:"Which battery to buy?" https://rennlist.com/forums/928-foru...ry-to-buy.html

Wally's post #57: https://rennlist.com/forums/8743001-post57.html
"For the terminally curious, this site purports to give a complete listing of battery brands and manufacturers worldwide.
http://jgdarden.com/batteryfaq/batbrand.htm
Wally Plumley"

blown 87

One thing to be aware of, the last several Interstate batteries I have dealt with have had very poor threads in the side mount types, I know this is not a issue with the 928, but with other types it is.
Just a heads up.