Anyone ever install an Interstate MTP93

[jess5engine]

I'm replacing my battery with an Interstate and would like some feedback on proper fit. The Interstate website recommends the MTP 93 for an 87 911, but I've heard they're a longer than the OEM battery. I've been told the MTP 91 is a better fit. Has anyone recently used any one of these batteries and if so, how was the fit? TIA

Jesse

[Wil Ferch]

I *think* Group size 93 is same as ( ?) 49...the big honkin battery that uses up all the available space. The next-smaller 48/91 uses the mid ( of three) mounting points pre-drilled in most floor areas. That will fit and is very close to the Optima size generally used. If you go this way ( use of normal type battery), use the small vent tube kit and find a way to push this tube through a local opening like near the front/bottom of 3.2's that have rubber drain flaps...to avoid spillage or gasses from venting in the trunk compartent...convneniently above the suspension pivot ( ! ) and just as conveniently spewing fumes RIGHT NEXT TO the fuse box ( ! )

-- Those clever Germans

--Excellence was "expected"....not achieved.

--Wil Ferch

[gr8fl4porsche]

I have the big one in my 87. Its a great battery but it is very heavy, hard to squeeze into the small space, and the terminals are difficult to put on and remove.

[makaio]

I have it in my SC. The same model came out of it 1.5 years ago when I replaced it. But, after replacing two batterys because of damaged cells, I will go with an Optima or Oddyssey(sp), next time.

[vash]

optima, buddy. the main benefit is that it will not leak.

[KTL]

For a drop-in, no hassle and smaller replacement, the MTP-91 size is the way to go. I have one and it fits just right.

Will look into the vent issue. Forgot about that. Good advice (as always) Wil!