StevesAMG

I got the pump in yesterday and got under the car to see how difficult the install would be. It was remarkably simple. The most difficult part was just removing the hoses and getting coolant all over you..However, the stock hoses clamped right up to the Johnson with no problem. I was even able to put the smaller Johnson pump in the same housing as the stock pump with just wrapping some extra rubber around it. The last thing to do was i just crimped the stock wires and mated them with the bare wires for the Johnson pump. The whole install took less than 45 minutes including removing the bottom plastic cover of the front of the car.

1st impressions:
I tried to run the car as hard as possible to see if I could get the blower to shut off. I couldn't run it all that hard but at the same time the power was always there.
I was more concerned with the fact that it would keep the air intake temperatures lower than normal, which it seemed to do. The car lights the tires up in 1st gear at will and seems to have more ***** for sure.

I have just one question forthose who may know.....When I removed the old pump, I lost what seemed to be about a quart of coolant(i was expecting all of it to come out). So I just added about that much to the reservior.....Is it that simple or is there a need to purge the system or what? If so, what should I do to it? Thanks, Steve

Jakpro1

Best case scenario, you should have flushed the system with new coolant to get out air bubbles that can get trapped in er. That can be a pain hooking up the hoses and having someone pour in fluid etc.

VRUS mentioned a few guys have had that problem. Keep checking that res for a week or so to make sure.

Real test is the datalogger and checking those IAT's.

Sounds like a pretty easy install, great job!

ItalianStallion

You said your car feels like it has more *****...did you actually see some power gains? I didn't think this mod netted anything more than having the supercharger run much longer under high loads.

Thanks and congratulations on the mod, the insufficient cooling system is the one complaint I had about the 55's.

StevesAMG

The way I understand it is that with a faulty IC pump....it doesnt necesarily mean that the supercharger will shut off at high IAT's and otherwise the car runs 100%.....
The supercharger shutting off is the EXTREME symptom of ultra high IAT's. However, it can still be on, however since the IAT is so high, you are losing power anyway....

I am thinking now that if cooling the temps down this much makes a difference, then perhaps i should install a larger heat exchanger also to get them down even more....the install seems simple. thoughts?

phatmitzu

Awesome!
The Johnson CM30 pump looks small dont it.

chiromikey

a larger heat exhcanger will difinitely help but what you could do that might give a noticable benefit and wouldn't cost more than a few dollars is simply separate the i/c and engine cooling circuits. it's as simple as removing the "t" fitting and reconnecting the hoses together. it would be interesting to see how much benefit is available with the oem heat exchanger if it's on it's own circuit.

SteveFox

Could you elaborate a little more on this.

chiromikey

the engine coolant and i/c coolant mix and should be separated for better efficiency...but nevermind, i forgot that he would also need to add a reservoir so it's not quite as simple as i stated. regardless, it would still be fairly cheap and easy so it might be worth some invetigation.

Ted Baldwin

.............the CM30 is $150 more expensive than CM090. What is the difference? I mean in concrete terms. Is the flow rate the same? Longevity the same?

Ted

phatmitzu

Wait, are we talking about the same Johnson CM30? From Steve's previous post, this eBay seller is selling it for only $69.

http://cgi.ebay.com/ebaymotors/Magne...mZ200141033580

Rafal

We must be getting different SC pump specs in Australia because of our hot climate.
I can run my car around the circuit track all day at WOT at 90F and have never ever seen my SC shut down! Can the guys from the Persian Gulf comment here?

narf

haha... i can't believe that the guys in the US are getting substandard components...

someone should investigate this...

i too have run my car at WOT at high and humid temps and expected a shutdown from all the posts here, but nothing has happened...

(my car was built, delivered, and sold in germany)

Ted Baldwin

.................yes that is the same pump. No one wants to answer if this pump is any different from the CM090 in terms of capability

...........As for US vs Australia, I think the pump is the same bosch oem pump. People in the Us change their pumps for two reasons. First is if the pump fails. Second reason is if you have a larger crank pulley adding more boost and generating more heat. I have never been convinced that a higher flow rate pump is better, but I who knows.

Ted

Jrocket

U.S. or Euro cars all use the same pump,over 13 different models use this same pump,including the SLR.

chiromikey

there is no cmo90. the co90 and cm90 flow 90lpm but the cm90 is significantly larger and supposedly more durable than the discontinued co90. both 90 series pumps require 1.5" diameter inlet lines to prevent cavitation and pump damage so running new lines must be considered. because of it's size, possible cutting of brackets and new mounting hardware is also needed.

the cm30 flows 30lpm, around twice the oem bosch unit. the cm30 is rated for the same life hours as the new cm90 so it is just as durable. it's MUCH smaller than the cm90 (even smaller than the oem pump) and because of this doesn't require special mounting, or cutting of stock brackets. the cm30 inlet/outlet is nearly identical to stock so there is no need to replace any lines with a larger diameter and you won't have to worry about cavitation.

Ted Baldwin

............thanks for the explanation. I actually just saw this link as well

http://www.johnson-pump.com/JPMarine...ion/index.html

Ted

stevebez

The difference btw the pumps' performance are :-

The CM90 flows 90l/min at 0.25 bar..

The CO90 flows 90l/min at 0.15 bar..

The CM30 flows 26l/min at 0.1 bar..

rbtronnie5

after you posted this...i watched them slowly start to diminish in size available...so i grabbed one. seems like a great deal.

Vadim @ FD

https://mbworld.org/forums/showthrea...78#post2376178

Here is an install on C32. E55 should be very similar.

TopGun32

if somebody has a data logger it would be nice to see the before and after on a E55.

if you are modded with pullies, even better.


I plan to do this mod soon. Next 3 weeks or so.

Vadim @ FD

Having scanned a lot of cars - 55 data will look very much like 32.

Cars with pulleys are about 25-30F higher under boost and very similar during cruise.

ChicagoX

LOL !

One left after my purchase.

dsc

Ya, I got one too.
What's with buyer "cj-special" getting 5 of them?

rbtronnie5

probably someone with a shop who can sell it to a customer for much more...i mean most of us here have to have some sort of business savy to get into these cars

SSM AMG

Just bought the last one. One question for the guys that installed it. Is it louder that the stock one?