shardul

iTrader: (1)

yes 178mm pulley

lowprofile

178 a very healthy jump from a stock 158mm (iirc). If you still have the same issue, I don't know if there is any other way to solve it aside from adding a reservoir. A reservoir serves two equally important purposes; 1) added volume, 2) it provides a place for air to escape. The system is constantly purging itself, which keeps the pump operating at it's full potential. Speaking of pumps, has anyone tried the Meziere WP136S?

shardul

iTrader: (1)

yeah i am thinking to getting a bigger H/E

Marcus Frost

Ok guys I wanted to revive this thread. I am still having IAT issues and I will be replacing my CM30 pump next week. Previously, I had a 178mm pulley and now I have a 180mm ASP. I'd love to see some other people's logs to compare...

-m

prodigymb

I'll post my logs from home. Data logger I used doesn't sample as fast as yours...

Exotic-metal55

Get rid of that POS Cm30 and you will be a head of the game.. If you have a large front H/E, seperated h/e system, pump wired to keyed power source and a Meziere W136 pump ,,, you should run below 140 on the dyno or track runs.. After all the dynos and data logging I have seen, that is the best reasonable set up, besides adding a trunk tank and keeping ice in it.

sneakyneon

Its pretty hard to make out, I would sample just IAT and something to indicate load, TPS or rpm. Might make it easier to read?

shardul

iTrader: (1)

+1

Marcus Frost

I already have a CM30 replacement pump, and while it may be that the system cannot keep up with "demand" - if that proves to be true and it all goes away if I order a Meziere W136 pump, then someone's going to have to make a thread that rescinds years of recommending the CM30, because that's what just about everyone uses. My car is far from being anything unique, so if it doesn't work for me it's not really working for anyone.

-m

Marcus Frost

Is this the one you are talking about exotic? Do I need anything else with it?

http://www.summitracing.com/parts/MEZ-WP136S/?rtype=10

-m

prodigymb

M just because people have been using it for years doesnt make it "the" solution. That Meziere pump is often used in other supercharged apps such as Terminators and Lightinings. I have seen someone post logs that did show faster recovery with the Meziere then the CM30.

I use the CM30+Code3 HE+Rear mount tank

My setup keeps IATs in check, but I think I may have just ruined my CM30 so I will give the Meziere a shot.

Are your circuits split? Do you run a rear mount tank?

I did both of those things at the same time and that made a huge differnce in my IAT temps. The coolant always bleeds itself with this setup too

blackbenzz

Meziere makes good pumps. Lots of race cars use them. Just make sure you get the right fittings with the pump for your application (the blue fittings are interchangeable)

bassn_07

Could this pump really make a difference over a fully functional CM30 or even stock?

Marcus Frost

Very interesting. Thanks for posting this, it convinced me.

I have a stock, un-split circuit, with no additional tank. I have it that way on purpose.

I don't doubt your setup is ideal, I just don't like it on my street car. I don't like having coolant lines running through/below/wherever through the car, I don't like having coolant in my trunk, I just don't like this "extreme" of a system in my daily driver. In my opinion, I would like to engineer a cooling system that is sufficient and as stock-like as possible. Adding more capacity absolutely helps but the truth is if your system cannot cool down 5 liters of coolant it will NOT be able to cool down 10. It just postpones the inevitable.

I just called my shop and we are going to do a WP136 unit. I am excited to see the results.

Assuming the Meziere works out like it did for everyone else, I think it's time for the "accepted" route of the CM30 to officially get the axe?

-m

jangy

This thread is AWESOME!!!! This is what this room is all about.

Good thought M

Can we get a sticky??

MB_Forever

The CM30 was not much better than stock (very close in performance). People have been using it because it just had a longer life span (or a less failure rate) than stock pump.

Well, I'm not sure it would explain the success that some of the guys has had with it in the past few years Could it maybe be the result of a bad pump or a failing one?

prodigymb

Marcus - You could split your systems and add a small fill tank instead of a rear mount tank. I have seen it done like that too and it's a fairly straight forward setup. It just doesnt make sense to me why MB did not seprate the systems.

CM30 served me well, but it has been shown on numerous occasions that it flows just as much as new/good OEM units. At this point my CM30 may be shot as well since I forgot to drain water from the secondary system and replace it with coolant. If that is the case I will also be switching to the Meziere.

Exotic-metal55

Yes, that is the pump and I also use their blue fittings.. They are o ringed and do not leak..

I have seen IATs dyno logged of all kinds of set ups now.. Duel H/E`s, trunk tanks and even top mounted SLR tanks.. Sad, but none of those cars ran a set up like mine and Shardul`s and they all ran hotter on the dyno.. Using Cm30 and then adding a trunk tank , is a band aid for a crappy weak pump! IMO Think about it! The Cm30 are magnetic drives,, they can not handle a lot of heat or back prerssure..

Take the top off your Cm30 (3 screws) and look at what you are trying to flow water through.. If these pumps were so great, all the great boost builders would be using them.. We got sold by a few tuners early on and that is the bottom line..

When you get the Mezerie pump in your hand and then put it next to the CM30, you will see what you have been missing..

Marcus Frost

Yes I am aware that I could split the systems but I like having capacity, and the truth is there just isn't anywhere in the engine bay that would give me the capacity I'd be happy with. Also, most people don't seem to acknowledge that there is a benefit in having a good cooling system for the engine as well, and not just for your IATs. I want to keep everything cool so I keep the system together for that purpose amongst others.

I always knew the CM30 was not necessarily a performance upgrade over the stock Bosch unit, however if mine has failed and others have seen it as well then the idea that it is an upgrade from a durability standpoint may also come into question - at which point you wonder if it is worth considering at all for those who have their stock units fail.

-m

Zod

This!

The CM30 was a replacement for the old defective pumps of 2003 etc. After 06-07 they were changed and upgraded (recall). No need for the CM30 tbh.

This Meziere looks like an interesting alternative though, but is it better then the upgraded stock pump?

forcefedjunkie

This gauge records data and plays back on the gauge itself. Not sure if that qualifies as a datalogger. It's made by Aeroforce Technology Inc. They are working on adding enhanced parameters at this time. Currently it displays the generic stuff, IAT, ignition advance, rpm etc. Does the Dashdaq display enhanced or just generic parameters?



Todd

reitmeid

I have a new Meziere and fitting for sale. See classifieds if you're interested.
https://mbworld.org/forums/engine-pe...pump-sale.html

TopGun32

sent you a message.

tks..

emoving

Here ya go!

Worth the wait

Well since this has turned into a data logging AND iat thread......

What is the end result of heat soak on the engine? I assume the engine pulls timing and adds fuel once the sensor reads high iat's???

High iat's should not lead to a lean condition, right?

Thanks for the great info here!!!