[Mk2] [Turbo] boot mount intercooler

[tarmac terrorist]

boot mount intercooler finished here are some pics of the way i went about it:
1)intercooler

2)lower box for intercooler









3) time to cut the hole,no going back

4) under vent




5)then moving fuse box to make room for intercooler pipe




5)intercooler in







6)next boot lid modification

















then tidy up of all bits










fans underneath







viola all done if only it was that easy lol hope this helps for any one who is thinking of going this route

[Martin F]

great thread mate, very helpful, what advantages have you got or are you expecting ?

will a remap be needed?

[tarmac terrorist]

as of yet dont know about advantages as i am running the engine in after full rebuild, am hoping to get a lot cooler intake temps but we shell see, as for the remap it will need one due to various other mods since last map,i may also add a water spray bar to it later on

[JJ]

Brilliant !

Have you pulled the rubbers from the side vents ??!! Opens a clear channel to the boot too over the inside of the rear arches !

[cantfindausername]

JJ what bit needs to be pulled here? Do you have a pic or anything?

[Steve Horrocks]

If you look in through the side vents, they are lined with a shapped rubber duct which travels air into engine bay, if you pull this out (cut or 3 bolts (iirc) from inside, then it's open passage over wheel arch to boot.

[cantfindausername]

Ah cool, thats what I need to do then to mind.

[tarmac terrorist]

on mine at the mo i have cut two 3"holes in the rubbers & run the ducting from there straight into the sides of the intercooler,but may end up cutting the rubber out completly if this is better any advise on how to get as much air into the boot as possible would be great,have also thought about running ducting from the front bumper right up to the boot not shore how this would work

[JJ]

Tricksters running his with no boot lid mods ( looks stock ) but gets great air flow from the side vents. Great ait temps at high boost !! Dont think they're ducted either.. just natural flow !

I believe this mod is a must for any boot mounts as long as you havent been maticulous with making cowlings from the boot lid !

tarmac terrorist - see how your setup goes first, if you start getting some increased temps, I'd be more inclined to removed your hard efforts and simply let the air flow through the rears, mass will be greater than the ducting you've created - unless you install some inline bullit type /cylinder fans like those fitted to nascars ... wonder if those ebay superchargerswould work !! I dont see why not !??

[tarmac terrorist]

thanks for advice jj think i might cut the rubber out as you suggest then extend the ducting down into the engine bay and under the floor to get extra flow what do you think mr2 guru lol you should start up a help line like the samaratans lol

[JJ]

thanks for advice jj think i might cut the rubber out as you suggest then extend the ducting down into the engine bay and under the floor to get extra flow what do you think mr2 guru lol you should start up a help line like the samaratans lol

Lol !! I only help those that are on the edge of suicide with their MR2's !!

[tarmac terrorist]

cut the rubber out to day as suggested cooling is a lot better but intercooler still seems warm any one know how cool or warm theres are after they have had a bit of a blat.. im not running the fans at the mo which i know will improve it more just want see how cool i can get it before adding the fans, as of yet all these tests have been at no more than about 70mph so i know air flow would not be as good as at high speed any boot mounters out there with this info would be great??

[JJ]

As the air flow isnt direct in the path of the intercooler, the only way to be effective is to run those fans .. if anything, you've opened up the ability to allow the air flow through with the fans doing their bit though....

I dont think theres any improvements to relying on the natural air flow of a large boot mount compared to a sidemount without them.....

What sort of temps have you been getting....

I have a HKS sidemount.. and if I'm running 1.4 bar all day long... it doesn't really budge above 42 degrees intake temps.... having said that.. this is road driving...not track... I'll see a different picture then....

If I crank it up to 1.6 bar... then the temps do start to spiral upwards, showing the limitations of the sidemount... good in short birst.. but track work... I'll be looking at an expensive barbecue !!

I've got an Aquamist MF2 mappable water injection system to clag on to help...... just been lazy upto now as I've not really needed it !!

In summary... buy a couple of relays and get those fans running !! dont be datalogging it without.... otherwise you'll probably be dissapointed !!

[tarmac terrorist]

thanks again jj i have now also removed the ducting which it has improved it even more, am also in the process of wiring the fans in, i used to run a spearco side mount with an awsome spal fan on it the out side of the intercooler was always cold in some ways i wished i stuck with it and not gone for boot mount as of the moment i dont no actual intake temps as im not running the apexi (dont know how to reset the map on e.c.u as it was mapped for 800cc injectors) im justing going on feel of pipes which is not very scientific i know

[tarmac terrorist]

if you dont mind me asking jj what sort of power are you running on your vehicle

[redmr89]

i could be completely wrong here, and im sure someone will correct me. but my understanding of the airflow over the mr2 is that it comes over the roof then spins back towards the cabin like a vortex. drawing hot air out the engine. so how does that scoop on your boot get cold air in?

i would have thought venting the rear wings into the boot would be better, or what i think would look awesome. is..



take that ask motorsport engine cover, add a roof scoop and some ducting to the boot down the middle of it. and it would look good and ram air into the boot.

[tarmac terrorist]

i used the idea from alpha no3 & one of phoenix power cars as of yet no hot air seems to be going in but we shell see if it does then i suppose i will have to block it a just have it for show, what i would like is one of the engine bay covers that buddy club use it looks cool,the rogue fans should suck the hot air out quit well hopefully throwing it above the boot vent


sorry about picture quailty

[redmr89]

i can see where youve got the idea from. and if they do it it should work.

i just think ramming air in would aid it more.

maybe mounting the ic at 45 degrees and have it exit out the bumper would have reduced the heat soak from the exhaust?

ive seen boot mounts done loads of times and they always exit to the floor, is heat soak an issue from the exhaust?

im no expert here and i havent done this , just chucking some ideas in.

[tarmac terrorist]

mine is angeled at approx 45 degress ,and the boot floor is completly cut out under it but i have a under body scoop the full length of intercooler near the exhaust is about a two inch gap then near the bumper is about 5inch im hopeing that any air that is passing under the car will go through this and act like a venture & pull air through all ideas are welcome mate as this a work in progress

[JJ]

i just think ramming air in would aid it more.

We're limited to what we can do with these mid engines, ramming the air in is a great option if we're able to do it... however, thats the reasons for implementing fan assistance.

The option of opening up the side vents will allow a greater mass of air to enter the boot area... in fact probably reducing the need for the scoop on the boot lid too.

Heat soak from the exhaust wont be such an issue if the fans are directing the air down over towards the exhaust.... but if static without the fans... its inevitable... even just cruising.. the exhaust will be at 600 degrees circa !

What tarmacterrorist has done is great irrespective of air exiting the rear or the floor... either way, the drag effect when the car is in motion will pull the heat from the boot / intercooler area.

but my understanding of the airflow over the mr2 is that it comes over the roof then spins back towards the cabin like a vortex. drawing hot air out the engine. so how does that scoop on your boot get cold air in?

I dont think so much a vortex how you've described it, its the natural direction flow of the air flow over the top of the car, over the engine bay able to create an almost vacuum .. strictly speaking, the scoop is likely to be in the direct path of the air flow over the roof / engine bay.

I'm surprised no styling company has actually designed a boot lid with intergral spoiler with heat dispersing mesh in the proud sections ... almost like the engine lids that have a vent angle rear section... probably look naff though ?!?!

dont know how to reset the map on e.c.u as it was mapped for 800cc injectors

Have you got the commander as well ??!!

If you can get in touch with someone with a relatively stock setup - ie.. BPU with the 540's in... get a copy of the map off them, send me your ecu and I'll flash the map onto it so you can start using it. I'll check the map first and set it up safely too... you'll have to give me some characteristics of your current setup too ! ie. turbo spooling when etc

if you dont mind me asking jj what sort of power are you running on your vehicle

Not as much as others... but 500+ still .. which I believe is probably the limitation on these engines / running gear without compromising with reliability ( smashing every gear, smashing driveshafts, cracking blocks )......