Just installed mine, how reliable and how long can I expect the Johnson CM30 pump to last? I'm very WOT friendly

I read somewhere it works fine for the E55 guys but for the CL and SL guys it still fails

I've heard that this pump works far more effecient than the stock Bosch. I've bought one for my CL as well and I'm installing this week. Have you found any difference with this pump in terms of performance? I hope that the life span for it is more than the Bosch.

I may have bought two defective ones but I went through 2 Cm30`s back to back. Maybe 500 miles on one and 1000 on the other. Aftert doing a lot of measuring and looking into head pressure, the Bosch is my favorite by far. They also fit better and have a larger volumetric area.

Exotic-metal55,

The Bosch I/C Pump you have is the stock one right?

No, I bought it online. Most domestic tuners use this part. Lingenfelter and others. Only cost 119.00.. See spec info below. IMO- This pump kills the Cm30 .


This pump is Bosch part number 0 392 022 002 and is used in many of the supercharged Mustang Cobras and supercharged Mercedes.

This is an OEM pump. It ships with no documentation. Please check below for pump specifications from Bosch; these are the most detailed specifications available: The no bs flow rating on this pump is around 317 GPM. I data log all my mods and of course pumps I have run. This pump and my aux heat exchanger can handle all the power I am putting to the ground .. IAT recovery is around 6 -8 seconds.


I posted pictures in the past comparing the cm30 to the bosch and head pressure specs. Flow test , only show un-restricted flow but pushing water through a cooling system is a whole different ball game..

Why spend more for less of a pump? The Bosch is a great buy and it fits factory specs. CM30 is smaller and has to be adapted to fit..

I put 20,000 miles on this pump and it's still running strong!

I am using the Johnson CM30 pump. It was put in by Serge over a Heyvon/HMS motorsports in the O.C. This pump works wonderful. Even in the high desert heat it holds up. No complaints here.

I just ditched the CM30, installed the CM90 with the 38mm ports but had to shrink the neck to fit the current hoses. I am aware this will cause some back pressure but I can tell it's alot better over the CM30 still.