Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Mercedes-Benz Performance Paddock

LinkBack Thread Tools Display Modes
Old 03-31-2017, 09:21 AM
Mighty190's Avatar
Registered User
Join Date: Apr 2016
Location: Lafayette Indiana
Posts: 379
CCA needed to reliably start M103 on track?

We're trying to save a bit of weight on our 190 track build. Its already down to 2350lbs but we need more(less)? Whats the lowest CCA battery people have seen reliably start one of these engines? A little 51 group battery out of a civic has around 500CCA and weighs about 26lbs vs almost 50 for the original one.
Reply With Quote
Old 03-31-2017, 10:26 AM
Registered User
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,493
You might check this thread.

I replaced the lead acid battery with ultracapacitors
“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now
Reply With Quote
Old 03-31-2017, 12:29 PM
Registered User
Join Date: Aug 2005
Location: Napa Valley
Posts: 349
Probably more than you want to know but it's all here.
Reply With Quote
Old 04-01-2017, 06:17 PM
Alain V.'s Avatar
Senior Member
Join Date: Aug 1999
Location: KS.
Posts: 459
I've been using this tiny "Braille" battery in my 16v track car for 5 years and never had an issue. It is mounted in the car on the floor, right behind the pass seat.
Braille B2015 No-Weight Battery, 425 CCA

..............and here's the car,
independant MBZ tech since 1981
Reply With Quote
Old 04-01-2017, 06:52 PM
Registered User
Join Date: Jan 2012
Posts: 7,146
The 51 battery will be fine, MB batteries are usually oversized to deal with idling with the AC on or starting well below zero.

Make sure the ground strap between the engine and frame is good and battery ground to frame is good also. ( the battery is or is going to be trunk mounted correct? ) Take the starter apart to make sure the brushes are good as well.

The trigger wire for the starter needs high current otherwise you won't get reliable cranking so either use a 10 G wire / good switch for cranking or use a Ford starter solenoid to trip the starter. ( Look up " hot start kit " )
Reply With Quote
Old 04-10-2017, 12:59 PM
Mighty190's Avatar
Registered User
Join Date: Apr 2016
Location: Lafayette Indiana
Posts: 379
Thanks for the info guys. Sorry about abandoning this thread. Got really busy prepping the car for a track day and then breaking it

We're going to go with the honda battery when we relocate it soon.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 04:27 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page