Sorry I do not know how you grab a post and get its link id, wish I did, here is the answer to your question as to the size of the stock h/e. Woody Wow no more blue? Durn

Re: 240M3SRT's SRT6 mods/how-to/dyno/times/rants/ect - 03-11-2008 , 08:35 PM



LET HEAT EXCHANGER AND JOHNSON PUMP:

I just got the heat exchanger fitting exactly the way i want it. The way it came it fit the car but i preferred it to sit a little more straight up and down so i modified the brackets. It also allowed me to pass the top hose through the tow hook with a little more clearance. Keep in mind i am an **** retentive perfectionist, who cant leave well enough alone.

I measured each HE literally fin to fin, not taking into account the outer casing of the core. Here are my definitive numbers:

Stock HE: 1 5/8 x 4 1/2 x 21 3/4, 159 ci of volume
LET HE: 2 1/4 x 5 3/4 x 25 3/4, 327 ci of volume

Please double check my math, but if my calculations are accurate the LET HE is 105% larger than stock. Thats TWICE THE VOLUME!!! Ill be the first to say it didnt look THAT much bigger but the numbers dont lie.

 

Love digging up these old posts....
wonderful stuff for me newbie.
I'm sure you guys are over it though...

The amps reduce becasue the flow is reduced - simple as that.
Amps are roughly proportional to the square of flow = work.
Its not necessarily cavitation as to what is refered below....unless the pump is NPSH is below its spec - that's when you can exceed the liquids vap preuures and induce cavitation.

I'm curious if - all things being equal (ie: same IC, charge air cooler (obviously) and fluid mix (10 or 20% Glyco) - if increased flow has helped AIT?
My thinking is - AMG should have engineered this with sophisticated calculations to mimimise AIT = end game.
Increasing flow doesnt necessarily decrease AIT 'cause the residence time through the IC is reduced = less cooling time. I would have thoguh AMG had optimised the syste - but stranger things have happened and component deals/partnerships and business lunches/time can get in the way of r "perfect solution.
It can be calculated but I've been too busy with real client calcs to pay my bills - make money.

Also Woody - do you have a feel for presure drops through the system?
(note: CCA = Charge Air Cooler)
Pipe>pump>pipe>CCA>pipe>IC> back to the start
each has a resistance and in series they end up with the total head and flow of the pump.
I'm hearing the IC has the gratest dP, but looking for numbers.