Adding an intercooler?

Submitted by jwm on

Forum: 

My Fourtrak is the first car I've had with a turbo, just having a search round there is stacks of information on mods, but I was just looking at the difflock site and came across a few discussions on intercoolers. I know some of the later Fourtraks had them, is it possible to add one to an 89 F75 and are there any major headaches involved in doing so?

thanks

John

I really cant see why you wou

Submitted by Anonymous User (not verified) on

I really cant see why you would bother for the minimum increase in bhp
you would realise. If your track already has a turbo it would be minimal m8....

intercooler

Submitted by Anonymous User (not verified) on

i have added an intercooler to my f75 i have gained a fair bit in power i fitted a landrover discovery tdi intercooler not too bad a job. making up the piping is the worst part the tdi intercooler is quite big hence the reasonable power gain if you want more info and pictures contact eval(unescape('%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%27%3c%61%20%68%72%65%66%3d%22%6d%61%69%6c%74%6f%3a%68%65%6c%62%79%63%68%6f%72%75%73%40%61%6f%6c%2e%63%6f%6d%22%3e%68%65%6c%62%79%63%68%6f%72%75%73%40%61%6f%6c%2e%63%6f%6d%3c%2f%61%3e%27%29%3b'))

i agreee

Submitted by horsepower on

i think this diahatsu page needs to experient more on these diesel engines there capable of alot more than what these people give it credit for!!! there is someone who has gained nearly 15bhp by fitting a intercooler and playing with the diesel pump out of a standard non intercooled diahatsu

You could be right. I have

Submitted by Nev. K on

You could be right. I have to point out though that correctly timing the engine may have accounted for the lions share of the increace though. The earlier traks were notorious for being set up 'wrong'. That said, more air and fuel must by definition make for some more power.

Any veiws expresed in this thread by me are purely from my own experience, and (sometimes) falible memory. Hope my comments help, but please don't take them as gospel.

Any veiws expresed in this thread by me are purely from my own experience, and (sometimes) falible memory. Hope my comments help, but please don't take them as gospel.

I have intercooled my F75. As

Submitted by bundyrumandcoke on

I have intercooled my F75. As stated, the pipework is a bit of a fiddle. I used a later model Daihatsu F75 intercooler. They fit in behind the grill on the passenger side. First, I rotated the intake of the turbocharger about 140 degres, (2 out of 5 bolts) so it pointed down instead of as standard upwards. I then mounted the intercooler without the grill. You have to move your radiator overflow tank, and use a holesaw to cut 2 holes beside the radiator. I then bought some 2 inch thin walled alloy tube and some 2 inch 90 deg rubber mandrel bends. You then just have to fiddle round to make it all fit. I also had to trim the rear of the grill to make the intercooler fit.
Look here
http://groups.msn.com/AussieDaihatsuRocky/davidsrocky.msnw?action=ShowPhoto&PhotoID=94

here
http://groups.msn.com/AussieDaihatsuRocky/davidsrocky.msnw?action=ShowPhoto&PhotoID=95

and here
http://groups.msn.com/AussieDaihatsuRocky/davidsrocky.msnw?action=ShowPhoto&PhotoID=96

for some pics that may help you get the idea.

The plumbing from snorkle to engine goes
snorkle into side of air cleaner canister, from rear of air cleaner into turbo intake, from bottom of turbo compression chamber forward to bottom of intercooler, from top of intercooler back and up into intake manifold.

My opinion, its worth the trouble to intercool them.

Growing old is compulsary, growing up isnt, and
MUD MAKES EXCELLENT TOOTHPASTE

Growing old is compulsary, growing up isnt.
MUD MAKES EXCELLENT TOOTHPASTE.
I use billion dollar satellites, to find Tupperware.
Please visit http://groups.msn.com/AussieDaihatsuRocky/_whatsnew.msnw
All views and advice offered are my own, from my ow

Original Turbo

Submitted by Gilly on

Yo Bundy,

Question, can I do some tuning on the original turbo of my F75 1990.
It seems that mine comes in a little bit late for the mud crawling I'm doing with it.

Mine comes in at 2500 RPM and I need it at 2000 RPM.

Be good,

Gilly

Gilly, I dont know. Turbo's

Submitted by bundyrumandcoke on

Gilly,
I dont know. Turbo's are one area that my knowledge is fairly limited. Making them come in at a lower RPM is something I cant help you with. Id suggest maybe checking the web for info, (maybe a turbo 4 cyl sports car forum), or consulting a turbo specialist to find out if it can be done.
Growing old is compulsary, growing up isnt, and
MUD MAKES EXCELLENT TOOTHPASTE

Growing old is compulsary, growing up isnt.
MUD MAKES EXCELLENT TOOTHPASTE.
I use billion dollar satellites, to find Tupperware.
Please visit http://groups.msn.com/AussieDaihatsuRocky/_whatsnew.msnw
All views and advice offered are my own, from my ow

Yo any one, Question, can

Submitted by Gilly on

Yo any one,

Question, can I do some tuning on the original turbo of my F75 1990.
It seems that mine comes in a little bit late for the mud crawling I'm doing with it.

Mine comes in at 2500 RPM and I need it at 2000 RPM.

Be good,

Gilly

Blown

Submitted by assassin on

You can add an intercooler, and it is a worthwhile addition, an intercooler cools the inlet air which is heated in the turbo, this makes it more dense. More dense means more oxygen molecules in simple terms, which means more fuel can be injected and will combust correctly.
This will require the injection pump to be set correctly to maintain the emissions levels within legal operating requirements, but as many will be slightly off, it is worthwhile, as many were set up for low emissions rather than power.
Fourtrak turbo's come in at around 1900 RPM, and continue to provide boost to maximum engine revs, so check this is happening, if not the turbo is either worn or gummed up. Gumming of the turbo bearings occurs when the turbo is still spinning and the engine is turned off, this cuts its oil supply and the oil in the turbo bearings simply overheats and forms a gum. Use a good oil cleaning additive if this is happening, it will clean any gum away.

Have the injection system checked and set up by a specialist bosch injection company, they will set it up for maximum power and maintain the emissions levels

Once this is done you should have a smooth and powerful engine, correctly set up amnd more economy.

I have tuned these engines for around 150 BHP for use in boats, they have been ultra reliable due to the inherently strong engine, so should present no problems.