V12Godspeed

We are in the process of putting in a rear reservoir to help with heat soak issues.

A friend last night (Mike, thanks buddy) along with my brother installed a Mezziere pump and replaced the tiny CM30.

With the CM30 IAT's were:

Cruising 135-140
WOT 149-155

With the Mezziere

Cruising 160-180
WOT- 155-175

Something tells me the mezziere is flowing so fast it doesn’t give the water enough time to cool down in the heat exchangers.

We are adding a rear 5 gallon reservoir right now, let’s see if this helps. Goes to show you more flow is not always better.

At this point it seems we need to increase cooling capacity and more water to dissipate the heat faster. If all fails, then it might be time for Meth.

Cylinder Head

iTrader: (1)

Seen it a number of times that a new pump will just flow too fast. Make sure you don't have air in the system as well which is also a killer.

Jakpro1

Holy cow, is this FINALLY the proof we've been looking for!!!????

What about burping....clueless on 12s brother. THey need to be burped for air like our Komps???

If you go down in pump size and IAT's come back down, I am ditching my 90s once and for all. Maybe THIS has been my achilles heel all along. I die a thousand deaths by the end of the 1/4

Keep my updated buddy!

V12Godspeed

She was burped all night long..LOl, We burped her for an hour or so until there was not a sign of bubbles.

With the rear reservoir you will not need to bleed the system as it is self bleeding, the water comes in an out and gets rid of air. We shall see tonight if this is the issue. If its worst I am dumping the Mezziere immediately and going back to my CM30.

The pump is just too monstrous of a pump...

jcjmw

Wow! that is fascinating and valuable info. Does this mean the use of the slower stock pump is best? Stock pump best if you hv a larger HE and/or reserve tank?

Robert AMG

iTrader: (1)

look at this thread:
My Meziere pump experience

jmb614

It seems to vary from setup to setup, I've read where some have experienced the same as yourself, V12. Yet others have had great success with the meziere over the cm-30 such as myself. I've data-logged extensively and have made the comparison as scientific as possible, and the Meziere has come out on top, for me.

I wonder if there is a thermodynamics engineer lurking around on the forums that could shed some light on various reasons why there is such a divide between seemingly similar systems. Perhaps there are variables we aren't taking into account?

Simply because you are experiencing an increase in IAT's by switching to the Meziere, in my mind, doesn't provide definitive proof that using one pump over another is better for everyone.

ahmad0658

What is your set up?

GregMB

As a quick experiment why not just put a glorified "ball valve" on the output side of the Meziere pump to restrict the flow a little bit?

Pump efficiency is directly related to how much resistance (in pump lingo sometimes referred to as "head") it's pushing against.....in a cooling system with a lot of extra hose and restrictive 90* fittings you will create more load against the pump and the flow rate will be lower.... In a more efficient system, that pump won't see much resistance and will flow close to it's peak output.

I might be stating the obvious to you guys.... But if I wanted to test a "flow is too fast" theory, I'd find a way to put some restriction in the cooling hoses and measure those IATs again. A few quick tests and flow changes should prove (or disprove) that theory without the effort of tearing out the pump and replacing it with something else.


-G

Jakpro1

I just can't say how excited I am to see these results. If these IATs go down, I think it's settled that too much pump hurts performance once and for all. Then again they just "settled" global warming debate.

Kinda thought so after watching Mikey use those little Johnson 30's and torch the track and all his ice in the 5 gal res. Seems perfect flow for his setup.

bassn_07

Hey Jody, good to see you getting closer.

As for the pumps, my original setup consist of 2 CM30 in line with each other and flowed extremely well. After reading some good reviews on the Meziere I decided to install a single pump in place of the 2 CM30's, not even close in comparison. The single Meziere flowed like a gently river into my rear reservoir, while the 2 CM30's gushed like the rip roaring rapids. Chiromikey has the identical 2 CM30 setup and when we compared both cars side by side, it was very clear which setup performed better.

As you know, I datalog the crap out of my car and IAT's were always much higher with a single Mezeire pump, plain and simple. I'm sure others are having great success with the M pump (without the rear reservoir) but I would never personally recommend one after seeing the results. Just my $.02.

KLR CLS

Skip the cooler upgrades.... 1 V12+ 2 Turbos + meth = Deadly Machine

BlownV8

Are you sucking in hot air from under the hood or is your intake routed for cooler air?

chawkins2001

I have 2 meziere pumps in series and am never more than 10-15* above ambient. Did you run new hosing recently? I had the exact same problem as you when we first did my trunk mount, high iats, and it turned out I had a blocked screen in the trunk mount full of rubber filings from the new hoses. They gave off little rubber filings, you may want to check your screen just to rule that out.

AMG_RL

The main reason why you are seeing such high iat's with the meizure pump is because the engine is too big. Give me the car and ill give you my e55. Problem solved.

V12Godspeed

Thanks guys!!! Great info and valuable information my IATs are at 127... Cruising now after the 5 gallon reservoir. That's cruising around 40-60 mph...

Yesterday I blasted it to 120 and Luis is witness it dropped to nearly 100, I could have sworn I saw 97 degrees at one point. Seems that the faster air hits my big front mount the faster it cools it!!! Temps last night were 82 degrees.

Seems I just needed to expand water capacity and add 2 bottles of water wetter. Problem solved.

I am still considering Meth.

shardul

iTrader: (1)

Meziere up front and a rule2000 intank pump in the back FTW.
This setup was used by exotic metal in the texas mile, and after a burn out, 35 sec 180mph run, and a mile drive back to the pits area the water flowing was still cool, ice had melted.
The flow pattern is as follows
s/c > front h/e > rear tank > rule2000 in tank pump (which pushes the fluid to the meziere up front and back into the s/c cooling core

LOCO 05' E55

Two words.. She pulls!

Jakpro1

Thanks for the info. Heck with it, can't hurt me any worse in the 1/4. Gonna work on yanking the twin 90's and go slower 30s.

Roverron

Can you list your setup please. Did you add another pump or just more system fluid capacity?

Jakpro1

if you are asking V12God, thinking he added a 5 gal tank (more capacity) AND the pump in the rear tank (more flow)

LOCO 05' E55

Pump is in the front Jack. Although i believe and correct me if im wrong, our platform runs a few degrees cooler compared to the twin snails and i saw his IAT's Plummet at wot, which is definitely not the case with our cars. This was right after adding fresh water wetter mix on a first pull. That being said i believe on his application only one mezziere pump is doing the trick..Not saying two pumps wouldnt be better than one, but he had enough pressure squirting out back. Off course more pressure will keep water from getting hotter an hotter but not sure will make a world of a difference when BOOSTING with the two huge ****'S he's boosting with

IMO Next step should be Meth

Roverron

Thank you for reply...

BlownV8

Sounds like the pump is moving too much coolant when you are going slower and just the right amount at faster speeeds. Is there something that can make the pump's flow variable based on the speed of the car? I would think that, if the coolant was moving too quickly at lower speeds, without enough airflow over the heat exchanger it would not have have enough time to absorb the heat.

Exotic-metal55

Not sure why your MEZ raised your IAT`s but I have tested so many of them on stock and moded systems and they don`t flow to much or to fast.

If you run a front pump, then you need an intank pump to push water to it. Thats why I run a huge Rule 2000 intank pump to feed my front Mez. I flowed tested every combo excpet the CM90 pumps. Rule 2000 pushing to the mez rules! With Ice in the tnak, I can actually run to cold. lol