[Mk2] [Turbo] Lowering Inlet Temps

[Moo]

Dale - I used this reducer cable, as posted by Allan in the KB article. I also wired in a choke to the earth to reduce the noise but don't think it was effective as the diplays still tripped out until I found the type that didn't.

http://www.watercoolinguk.co.uk/catalog ... cts_id=348

Steve - Cheers for that info. I think I could squeeze a GT 4 rad in there and keep the air con rad but maybe it's too much of an ask to fit some fans to the rad as well. Would a water spray kit help keep the temps down when the car's not moving, same as the fans would do?

RenOW - I'll post a guide and some pictures on how I did my tempertaure monitoring later on today The KB Allan has linked to pretty much covers it all if you want to mount the displays in the ashtray but I've refined it a little by mounting them in the DIN blanking cover as they are easier to mount, easier to see and you can fit up to 4 displays if you wish.

[Dale_V]

cheers moo, thats the same I have

what CC coolant temps are you seeing on both a steady run and after a hard drive?

[Moo]

With ambient air temps around low/mid 20's I'm seeing CC coolant temps of low/mid 30's on a steady run raising to high 30's low 40's after a hard drive. It does vary slightly dependant on ambient temps but I've never seen CC coolant temps above 45 when on the move.

One interesting thing I've noticed is that when cruising my inlet manifold temps are only a few degrees above the CC water temps until I boot it then the inlet temps are generally around 10+ degrees higher than the CC water temps, both increasing exponentially.

My CC water temps when cruising are generally around 10 degrees above the outside air temp.

[Dale_V]

interesting, Ive only plumbed the coolant one in so far (needed to buy more wire today for intake ), but after a fairly hard drive the CC coolant was at around 38deg, so I suppose its inline with what you have seen also...

for some reason, I was expecting it to be lower

ill get the intake one plumbed up and see what this one gives me

[JJ]

Remember guys, the Ct-series turbos are flame throwers.. you maybe observing data of other more efficient turbos and trying to get a comparison.

I noticed a drop of around 10 degrees overalll swapping turbos out from the HKS signature to the Garrett DBB.

[Moo]

Sounds pretty much the same as what I'm seeing. At least I know my CC is performing in line with somebody elses setup.

I was expecting my CC temps to be lower too hence me wanting to improve the cooling by getting a larger rad and a better pump The way I see it, lower CC water temps should equal lower inlet temps which should equal more power

What rad and pump are you using with your setup?

[JJ]

i thought i was getting 25c with my cc until i learnt that i had to ADD ambient temp. to it
my sensor is in the inlet manifold so i dont know if im getting heat soak or my pumps are not up to the job. on a hot day full pull 59c is the highest its been. i would like to check other peoples temps. i have my own spare sensor and it would take 2 mins. even an intercooler so i have a compare with.i would come to u to do this , within reason

55 Degrees sat in traffic on a warm day !! 38 Degrees on the move again - Mines intercooled....

I've gone from chargecooled to intercooled and going back to chargecooled... main reason was the top fitting turbo fitment I went down... couldnt get the St205 no longer to fit !! Now on my friends !

[Moo]

Remember guys, the Ct-series turbos are flame throwers.. you maybe observing data of other more efficient turbos and trying to get a comparison.

I noticed a drop of around 10 degrees overalll swapping turbos out from the HKS signature to the Garrett DBB.

Very good point

[Dale_V]

JJ: suppose i should be happy then

Moo: im using a fiat chinq rad and an st205 pump

[Moo]

Chinq rad for me but don't know about the pump. I'm going to start by fitting the GT4 rad and one of those Bosch pumps mentioned earlier in this thread. I have enough temperature data to be able to see if it makes any kind of difference.

The last question is whether to fit 2 pumps or just the one

JJ, do you have an opinion on that?

[JJ]

JJ: suppose i should be happy then

Should be ! I did 4 laps on a track with the sidemount HKS... and friggin saw 80 degrees intake temps... and that was running at 1.1 bar... not the usual cooking on gas 1.7 bar...

Sidemounts are great at 1 bar.. unless you're doing some endurance driving... then it needs to be upgraded.... but by then, everything starts to heat up.... what you dont know doesn't bother you... but oil temps start going silly... couple of laps at donnigton saw my oil temps hit 125 degrees ( the ceiling of a lot of oils tolerances ).... again.. all pretty much related, if the intake temps are going up, the oil temps going to rocket up ( oil spray bar to the underside of the pistons )

Thats why its very important to stick a high quality oil... otherwise a rebuild will be on the cards...

[JJ]

The last question is whether to fit 2 pumps or just the one

JJ, do you have an opinion on that?

Moo... I'm a little contravertial on this... I dont like the brushless / impellar types, davies craig... all the other impellar types on ebay...think they're not durable enough.... they prove to be ineffective to any air locks in the system....PITA in fact.... I've had a few issues with my friends setup, accumulating air locks... and flow issues to any resistance....

The resistance you'll get partly through pushing the coolant through the rad ... so yes, they'll flow 14 litres or whatever if there is no resitance... ie. filling a goldfish bowl up... but any sort of resistance and the the flow grinds to a halt.

Again, people probably not aware of circulation issues if they havent a probe measuring that pan of boiling water above your engine. "Assuming" everything is fine and dandy....

I'm fitting a 17 litre per minute marine pump... little bit larger and heavier.. but reliable !! Diaphragm type.. which means can run dry, but most importantly, can handle a little back pressure ( 40 PSI )... these things suck and push !!! I used one previously ... a lower rating one which was effective and reliable.... Again, takes all the problems away from bleeding the system in a impellar type.

1 of these will be fine, no need for 2 pumps in the system, like having 2 central heating systems in your house.... !

hth

[Moo]

1 pump it is then. Do you have a link to that marine pump as it sounds just what I'm looking for

[JJ]

ebay :

Type in 17L Marine Pump... look for the 12V variation

[Dale_V]

what you dont know doesn't bother you...

damn right, maybe I should stick to this advice and overcome my paranoia but oh no... gauges for bloody everything

[JJ]

When I had my white stock rev 2 with boost tweek and teins... I hammered it around a track all day long.... never used a drop of oil or coolant... and drove it home happy as larry .. ruddy fast on the track too !!

Sure the intercooler I could have used to grill chicken on but .. that car is still running sweet as a nut even today !

No gauges, no worries...

I get twitchy these days when I see the EGT's sit around 700 degrees in the blue one !!!

[Moo]

ebay :

Type in 17L Marine Pump... look for the 12V variation

Top man, thanks

I know what you're saying with the gauges. I only fitted the temp monitors as a safeguard against pump failure but it's opened a new area of upgrades in the quest to lower the temps

[black gts]

i have two vw pumps , 1 is on the flow and the other is on the return. im thinking of a change as i think my temps could be lower
im also using a fiat rad , and the air con is still in and working

[Steve-O 2007]

Bosch pumps mentioned earlier in this thread

I noticed this on a MR2 Charge Cooler conversion guide that I was reading before doing mine -

However, in all honesty I'd try source a genunie Celica Gt4 pump as it's rated twice as fast as the Bosch unit but has more grunt to force the coolant round the system

might be best joining a Celica site and just getting an ST205 pump?

[Moo]

Bosch pumps mentioned earlier in this thread

I noticed this on a MR2 Charge Cooler conversion guide that I was reading before doing mine -

However, in all honesty I'd try source a genunie Celica Gt4 pump as it's rated twice as fast as the Bosch unit but has more grunt to force the coolant round the system

might be best joining a Celica site and just getting an ST205 pump?

That's an option but I'm kinda liking the pump JJ is using. Decisions decisions