[Mk2] [Turbo] Standard Intercooler Heat Soak

[alan-2-turbo]

Hi All,

My car is attempting to run at around 1 bar of boost but struggles when the air is not cool outside.

As im only running approx 260bhp could you recommend me an intercooler, i was thinking an ebay one but there seems none for sale on there.

Also is a new more powerful fan recommend over the stock IC unit?

thanks

Alan

[Nails]

i had a ebay one on my first mr2, and was never very sure of any difference if any, i have been looking for them on ebay myseklf though the last few weeks and theres none on, unless you want tp ay £200 postage from usa

[alan-2-turbo]

Yeah there a bit scarce at the moment it seems.

I get bad heat soak so i'm gonna get the proper shroud and also a massive 9" spal cooling fan, so that should do me, hoping it makes a big difference - at about 06-0.7 bar the turbo struggles with the heat with the standard IC

[Turbonoz]

This set up was nicked from my Rover Coupe Turbo, it's a Pular top mount IC modified to fit the Rover. Cost £40 delivered from a forum. Excuse the multi-coloured pipework, I used whatever I had lying around one afternoon

If someone wants to stick the IMG link up, it's here:

h##p://img.photobucket.com/albums/v73/bignoz/My%20Cars/MR2%20Turbo/IMAG0030.jpg

I do need a heat shield though, plus an additional 12" fan on the lid.

[T.F.S.]

water injection would yield far lower temps...

on my aftermarket one with shroud and puller fan i saw 60's within seconds without WI but when active it was low 30's even after long sustained mapping pulls on the motorway

measurements taken with an AEM sensor, turbo was 3071 at 14.7 psi

[jimGTS]

water injection would yield far lower temps...

on my aftermarket one with shroud and puller fan i saw 60's within seconds without WI but when active it was low 30's even after long sustained mapping pulls on the motorway

measurements taken with an AEM sensor, turbo was 3071 at 14.7 psi

that was meth or ethonal tho right?
not straight water.

big difference IMO

i run straight water and dont notice any drop and i run a highly responsive mat sensor....tho i am running a huge apexi/pp core....

[raptor95GTS]

a 50+mph draft through the intercooler is going to be far more than a 9inch fan can produce. I run a std intercooler and at 17psi I have to hold the foot down a looonnnnggg time to get it to get pst 80degC. On the road, not a problem really

[T.F.S.]

water injection would yield far lower temps...

on my aftermarket one with shroud and puller fan i saw 60's within seconds without WI but when active it was low 30's even after long sustained mapping pulls on the motorway

measurements taken with an AEM sensor, turbo was 3071 at 14.7 psi

that was meth or ethonal tho right?
not straight water.

big difference IMO

i run straight water and dont notice any drop and i run a highly responsive mat sensor....tho i am running a huge apexi/pp core....

it was a very high concentration of ethanol with some water but my testing showed that there wasnt a massive difference in cooling betwen alcohol and water

i use ethanol for its octane advantages, water is actually better for cooling...it phase changes at a higher temp so takes on more heat and has a higher calorific vauue IIRC
edit:
Latent heat of fuel = 350KJ/kg
Latent heat of Methanol = 1109 Kg/kJ
Latent heat of water = 2256KJ/kg



what sensor are you using to record inlet temps...not the stock one i hope!

[jimGTS]

it was a very high concentration of ethanol with some water but my testing showed that there wasnt a massive difference in cooling betwen alcohol and water

i use ethanol for its octane advantages, water is actually better for cooling...it phase changes at a higher temp so takes on more heat and has a higher calorific vauue IIRC
edit:
Latent heat of fuel = 350KJ/kg
Latent heat of Methanol = 1109 Kg/kJ
Latent heat of water = 2256KJ/kg



what sensor are you using to record inlet temps...not the stock one i hope!

those numbers mean nothing to me, lol
it also greatly depends on what state the water is in when it enters the engine. (ie droplet size)
im going off my own experiences injecting pre TB.
i havent injected meth, but plan to, but there will be a huge difference for a knock preventative compared to water.
water hasnt done anything apart from help knock a little in terms of temps.
then again without it i still see intake temps in the 30s anyway

my mat is one of the RAIT sensors in stock location.

[T.F.S.]

methanol/ethanol for knock is really good!!

have a look through this page for some setting up info
http://www.max-boost.co.uk/max-boost/intake/WI.htm

[raptor95GTS]

..snip


what sensor are you using to record inlet temps...not the stock one i hope!

I assume for me, a K type thermocouple - not perfect but good enough and reacts instantly. I think the gauge updates 3 times a second and the sensor is the open wire type so it has no mass to heat soak and nothing to lag it's response. I still want my chargecooler back in but need to redo the pipework / pump lol


Although on reflection for knock control it'd be easier and likely better to just fit WI - I read up on it for WWII aircraft and the work they did getting it to double an engines power was incredible. Not that I'd use it for that, just added knock control at current boost

[JJ]

Air to air sidemount it rubbish this time of year.. even having a larger HKS unit, I found the temps going upto 60 degrees in a few hard pulls... although I was running 1.4 bar.

On a track.. I ran 0.9bar.. and 65 degrees after 4 laps, ruins play. So if you intend keeping a sidemount, stick water injection in there. Else.. chargecooler setup !