Before:
371 hp, 411 lb
After service during which MB replaced pump with the most updated Bosch pump:
432hp, 454 lb
NB: a new OEM torque converter was swapped in between, but shouldn't have made a diff?
371 hp, 411 lb
After service during which MB replaced pump with the most updated Bosch pump:
432hp, 454 lb
NB: a new OEM torque converter was swapped in between, but shouldn't have made a diff?
the torque converter (if bad) would have not been putting down optimal power as well - but nice gains in replacement!!!
MBWorld Fanatic!
Interesting...
I'd always wanted to see a before / after dyno for the IC pump swap.
That's the cheapest 60hp you'll ever buy!.... What, about $2/HP?
-G
I'd always wanted to see a before / after dyno for the IC pump swap.
That's the cheapest 60hp you'll ever buy!.... What, about $2/HP?
-G
MBWorld Fanatic!
Got to love that, enjoy your newly found powa
MBWorld Fanatic!
Quote:
371 hp, 411 lb
After service during which MB replaced pump with the most updated Bosch pump:
432hp, 454 lb
NB: a new OEM torque converter was swapped in between, but shouldn't have made a diff?
Can you also show a before and after AFR?Originally Posted by TonyC
Before:371 hp, 411 lb
After service during which MB replaced pump with the most updated Bosch pump:
432hp, 454 lb
NB: a new OEM torque converter was swapped in between, but shouldn't have made a diff?
Quote:
Sorry, I only have the AFR from the first pull, as the wideband's connection to the dyno was kaput during the second session.Originally Posted by jcjmw
Can you also show a before and after AFR?
Member
hey mate
y did u change the torque converter ??
could u feel it was bad ??
y did u change the torque converter ??
could u feel it was bad ??
MBWorld Fanatic!
I gained 35whp from a dead pump so yes, it matters...lol.
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Quote:
could u feel it was bad ??
I was getting jerky stumblin' when I go on boost at low revs/low gears. Apparently there was some TSB issued, and the stealership just robbed MBUSA of $2000 and installed a new torque converter under the extended warranty. They first changed the tranny oil/filter, but obviously that didn't do much. It's better now, but certainly not worth the tq converter swap.Originally Posted by SuperchargerV8
y did u change the torque converter ??could u feel it was bad ??
(Note to those who may eventually read this when/if I sell the e55 wagon: 50% of commonly failing parts on my car has now been replaced under warranty. I think the only thing isn't new are the airmatic shocks)
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Apr 11, 2026
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anyone know the best place to buy the bosch pump? i think my CM is done after about 2 years.
