Serp waterpump flow rate

Post by **Coops** » Thu Mar 06, 2014 1:00 pm

Anyone know the flow rate of the serp waterpump?
Before I spend any money on a new rad or intercooler setup serck Motorsport need this information to see if the current setup is fine and all I need are more powerful fans.
They are also going to flow test my current rad to see if it's OK and service the rad foc

stevieturbo · Post by **stevieturbo** » Thu Mar 06, 2014 5:17 pm

It's an OEM pump used in vehicles fitted all over the world ?

From our wonderful climate, to places like Dubai.

I doubt the water pump is the problem.

What are the dimensions of your water rad ? And which fans, and what rad coverage do they give ?

I just put a new rad on mine, as old was leaking plus I made some changes

It's same dims as old anyway, just some fitment alterations.

700mm end tank to end tank, 435mm tall and 45-50mm thick ( Core is 45mm I think, header tanks are a bit more )
Single large 16" Spal puller and a second hand motorbike fan on the corner.

Post by **Coops** » Thu Mar 06, 2014 5:32 pm

Hi Stevie,
its a cossie 500 rad,
will get dims later,

Reason Graham at Serck needs the pump info as they will flow test the rad when it goes up to them, they said some pumps on certain rads work to well as in the water don't cool as its rushed through the rad and back into the engine,
They now do a mod to the rads where it goes through twice before going back to the engine, and he said they have seen improved cooling on many big yank motors,
They are going to do this FOC on my rad to see if it helps BUT like I said he needs the flow rate of my pump to work it all out etc,

he can also work out if the rad is big enough too then.

stevieturbo · Post by **stevieturbo** » Thu Mar 06, 2014 5:39 pm

Seems a very strange approach given flow itself is a huge variable....

Flow rate will vary with rpm, pipework, stat used, rad used etc...

And lots of flow is never a bad thing when it comes to cooling !!

If it flows through the rad too fast, then it has to flow through the engine equally as fast.

the main solution is a bigger rad, certainly not less flow. And for any test to be valid, they'd need to know the heat input from the engine, nevermind pump flow. Plus cooling airflow.

Post by **Coops** » Thu Mar 06, 2014 5:58 pm

right had a quick measure as best I could,

core size is 630ish x 320ish x 50
overall tank end to tank end is 730ish,

stevieturbo · Post by **stevieturbo** » Thu Mar 06, 2014 6:03 pm

It is smaller than mine, dimensionally it doesnt sound like a lot..

But in terms of area, mine seems to be about 35% larger which is a substantial amount.

DaveEFI · Post by **DaveEFI** » Thu Mar 06, 2014 6:20 pm

If it helps, the SDI core as fitted to the injection cars is 460 x 630 x 35mm.

Post by **Coops** » Thu Mar 06, 2014 6:21 pm

yeah what I was thinking,
I maybe able to go to about 420mm long have about just over 100mm gap to the lower valence area from the base of the current rad.

stevieturbo · Post by **stevieturbo** » Thu Mar 06, 2014 6:29 pm

Is there not room for a taller core in between the intercooler pipes ?

Or maybe even switch to vertical flow if it might suit better ?

Post by **Coops** » Thu Mar 06, 2014 6:44 pm

hell yeah can go about 600 tall between the pipes,

Post by **Coops** » Thu Mar 06, 2014 6:57 pm

right between pipes is 520mm (so would be around a 420mm core??)
and I maybe able to get another 150mm height so would be about a 420x 570 x(what ever) core size

stevieturbo · Post by **stevieturbo** » Thu Mar 06, 2014 7:14 pm

So 600 tall, 520 wide vertical flow. Say 520x520 actual core which is a pretty good core area of 270.4^2 ( whatever units lol )

Or 600 tall and 440 wide horizontal flow = 264.0^2 of whatever units.

Current is 630 x 320 = 201.6 ^2 whatever units.

So either option is adding another 30% in frontal surface area if nothing else, which will also add some 30% water carrying capacity too I presume, or close to it.
At least as far as how much water the rad itself holds.

Just depends which gives you the easiest or neatest pipe in/out options and easiest fan fitments.

Post by **Coops** » Thu Mar 06, 2014 8:17 pm

Just messaged him and he replied,

my current core size is a good starting point, but he wants to convert it to the following set up,

3 core / triple pass radiator

Dimentionally identical to our aluminium upgraded radiator except the end tanks are divided internally...

The advantages are as follows;
• The water remains in the cooler for longer as it has to make three seperate passes of the core face.

• Hot spots are eliminated as the water is forced to take a specific passage backwards and forwards across the core face.

its FOC so if it don't work all I have lost is postage and my time taking out and fitting in lol,

Ian Anderson · Post by **Ian Anderson** » Thu Mar 06, 2014 10:17 pm

Tony
Your rad is a similar size to those found in GT40 s

In old currency 1 foot by 2 foot

A 50mm thick core tjis size is said to be suitable to cool a 600 hp motor

They are currently making thicker rad with same dimensions which is good for engines to 900hp

Now here is the difference we have clean in flow of air and the hot air exits directly through the bonnet nostrils

Yours is through a restricted grill and then past a "stuffed" full engine bay

I would think your problem is lack of air flow

Ian

mgbv8 · Post by **mgbv8** » Thu Mar 06, 2014 10:29 pm

Do all these rads have the same fin spacing?