toyota 2.4L desiel performance?

[Dauntless]

might be best to learn to read M8

I think you need to learn to read over what you've written.

no where did i say that intercoolers REDUCE reliability.

In post #11, you said:

"finally, where do you plan on sticking an intercooler on a stock 2LTE surf with AC? in front of the rad? in front of the AC rad? are you really suggesting adding MORE hot air flow to a system that already has an over heating problem?"

no where did i say a small exhaust is a good idea

Yes you did. In post #11 you said:

"a larger exhaust DOES NOT give you more power or torque."

what i did say is you don't NEED to go 3" since the 2.5" is more than adaquate to get rid of the exhaust.

Perhaps this is what you meant to say, but it's not what you actually said. There is still quite a large benefit to going 3" over 2.5".

exactly WHAT turbo'd engines have you been "dealing" with?

Hmm. Toyota 3L +T, 5L +T, 2H +T, 1HD-T, Toyota/Hino N04C, Isuzu 4JB1, Mitsubishi 4D56, Nissan YD25DDTi, and a large number of Volvo B23/B230s.

In North America turbos and intercoolers are NOT cheap mods.

Err, yes they are. So cheap in fact, that it's usually significantly cheaper for Aussies to buy turbos and intercoolers from the US and ship them over, rather than buy them here. Suitable intercoolers won't be more than $300.

so what engines have guys blown do to being modified to my specs? or are you just spouting your inexperienced mouth off to hear yourself speak?

A Toyota 2H+T, 1HD-T, and Mitsu 4D56 come to mind.

The 2H cracked the head quite badly. It was running some sort of Garrett turbo with the stock NA exhaust, about 10 psi and no intercooler. The EGTs must have been insane. The guy has now sourced a bigger Holset turbo (about $250 from the US), and will be using a 3" exhaust, 15+ psi, and a nice big bar and plate intercooler, which was $225 on eBay. He hasn't found another 2H yet though.

The 1HD-T was stock except for raised boost and more fueling, and it blew two of the rods and pistons out the side of the block. Nasty.

The Mitsu 4D56 also cracked the head. It was running 18 psi I think, otherwise stock except for having the mufflers straight piped on the stock exhaust. Interestingly, it only had 170,000km on it.

The rest of them... simply picked up really significant power and torque after an intercooler, or large exhaust, or both, were added.

The D40 Navara picked up something like 35% power and 30% torque on the dyno, just through fitting a bigger intercooler, 3" straight through exhaust, and a chip. Unbelievable. I wish I could get his dyno sheets, but he's not a local.

 

[crushers]

a) no, it does not. it allows the exhaust gasses to flow more freely but unless you change or modify the induction side there is no change. the amount of combustable fuel and air entering the combustion chamber stays the same.
b) not significantly, over 14 psi then the heat of the charge of air negates the performance increase of boost. an intercooler will help under 14 psi but enough to cover the cost of the system is the question.

Crushers:

Clear this up ... this is important. Two questions:

a) A larger exhaust piping + exhaust manifold does not affect torque and horse power?
b) Does an intercooler increase performance if the boost is under or at 14PSI?

 

[crushers]

"I tried the boost mod way before the cooler and I put it back to stock almost right away. I did not like the feel of the engine with that mod. "

in what way was the "feel" not right? i tried this on the 2LTE LJ78 and over 14 psi the electrics seemed to cut the fuel so i kept the boost down to 14. is that what you felt?

top mounted intercooler is what i have been running for quite a while now, it doesn't affect the air flow through the cooling rad, no mods to the AC and with it on top then it doesn't get plugged with mud. i like it... a lot.

Hi Wayne,

Christ, I've only been gone a day and all hell breaks loose

I never messed with the fuel. Some mates tried it on their Surfs and got into some problems with getting it right (not using a pyro!). So I left it well alone.

I tried the boost mod way before the cooler and I put it back to stock almost right away. I did not like the feel of the engine with that mod. The truck had the original front downpipe on when sold at 285,000kms (I had it from 85,000kms). Only the end of the tailpipe was ever changed, and that was not at the time of the cooler.


Exhaust size is important, it does influence the engines characteristics. A 3'' exhaust has something like a 40% bigger cross sectional area than a 2.5''. And exhaust flow is not a linear relationship, so the back-pressure drop with a larger exhaust is considerable.

The A/C on a Surf lays under the engine - really poor design, mud magnet. I ripped the lot off, including the compressor (has its own belt). I top mounted the cooler because that's the way most are in Europe, I thought OEM engineers were cleverer than me so hey ho. Maybe room in the front but then very long pipes, lots of joints etc.

High pressures (say above 12psi) on diesels over here are rare. Boy racers in their little petrol VTEC Honda's - well yes, maybe up to 25psi). I've been reading about some of the pressures in the big Cummins in the USA and I'm amazed.

Oh forgot to say, an early mod was to disable the EGR - but again that was a long time before I fitted the cooler.

Back to the original post - I would say stop thnking you will ever make the 2LTE powerful - it's not possible, it is never going to feel like a big V8. But by doing all of the little mods you can make a difference - I concentrated on reducing load on the engine (discarded A/C and lost the bumpers), or cooling it (fully overhauled rad and hoses, tranny cooler, intercooler, EGR), etc.

Carry on.........

 

[Toyo Boyo]

"I tried the boost mod way before the cooler and I put it back to stock almost right away. I did not like the feel of the engine with that mod. "

in what way was the "feel" not right? i tried this on the 2LTE LJ78 and over 14 psi the electrics seemed to cut the fuel so i kept the boost down to 14. is that what you felt?

top mounted intercooler is what i have been running for quite a while now, it doesn't affect the air flow through the cooling rad, no mods to the AC and with it on top then it doesn't get plugged with mud. i like it... a lot.

Difficult to describe - felt like it was gasping for air or something. Like it was straining, wierd. Maybe it was the fuel being cut by the ECU.

Top mount coolers work fine - front mount are more effiecient but can be prone to clogging if you wheel in lots of mud (I do) and the pipe runs can be very long with front mount.

I checked to pipes after a run - the pipe leaving the turbo impeller was too hot to touch. The pipe leaving the intercooler was hand hot - I'd estimate no more than 50 deg C.

 

[crushers]

maybe i will check mine with the infra and get an actual...
sounds like a good test. i find i seldom go over 6 psi on the road and 10 psi on a hill but it is set for a max of 14 psi...

 

[Dauntless]

a) no, it does not. it allows the exhaust gasses to flow more freely but unless you change or modify the induction side there is no change. the amount of combustable fuel and air entering the combustion chamber stays the same.
b) not significantly, over 14 psi then the heat of the charge of air negates the performance increase of boost. an intercooler will help under 14 psi but enough to cover the cost of the system is the question.

A) This is not true. The less restriction in the exhaust system, the faster the exhaust gas can escape the cylinders (keeping in mind there is a limited amount of time while the exhaust valve is open). When the exhaust gas can escape more quickly, the cylinder is emptied of more waste exhaust gas.This allows more fresh air to fill the cylinder. More fresh air = more oxygen. Mix this with more fuel and you have more power.

B) You fail. Even at 8 psi you're heating the air between 80 and 100 degrees F. At those temperatures, the air is becoming 15-20% less dense. That's 15-20% less air, and therefore less oxygen, that your engine is breathing. Add an intercooler and 15-20% more fuel and you'll gain 15-20% more power and torque, and have lower intake and exhaust temperatures. Seems like a no brainer.

 

[scott hunt]

I ran a 2LTE for over 200,000kms after changing the HG - you will NOT make this engine powerful. But it is possible to make it reliable.



I JUST BOUGHT AN 88 SURF 2.4 2LT, AND ID LIKE TO GET AN INTERCOOLER KIT FOR IT, DO YOU HAVE ANY LINKS OR SUGESTIONS, MAYBE A KIT PART NUMBER, THANKS SCOTT HUNT

A quick pic of my Sheddy 2nd Gen Surf

 

[roscoFJ73]

Was there supposed to be a question ?

 

[GTSSportCoupe]

Was there supposed to be a question ?

Thread from the dead!! I think he did not quote properly, and his question is embedded in the quote. He's asking about intercoolers for the Hilux Surf.

@scott hunt : There are not any good kit's that I'm aware of, but you could search and ask on the surf forums to be sure. Not many surf owners on here.... With the LJ78 Prado (same engine) there are many of us that have done custom intercoolers. There was a thread recently with pictures and information on this, as well as many 'build' threads. Just do some searching and they should come up.

 

[scott hunt]

Thread from the dead!! I think he did not quote properly, and his question is embedded in the quote. He's asking about intercoolers for the Hilux Surf.

@scott hunt : There are not any good kit's that I'm aware of, but you could search and ask on the surf forums to be sure. Not many surf owners on here.... With the LJ78 Prado (same engine) there are many of us that have done custom intercoolers. There was a thread recently with pictures and information on this, as well as many 'build' threads. Just do some searching and they should come up.

thanks, ive done some research and think ive found a good aftermarket front mount option

 

[GTSSportCoupe]

thanks, ive done some research and think ive found a good aftermarket front mount option

Cool; have a link? I'd be interested to see.

 

[scott hunt]

Cool; have a link? I'd be interested to see.

Cool; have a link? I'd be interested to see.

i just read the specs on another blog, so i ordered a 28x7x2.50 intercooler and 2.5" pipe kit on amazon, less than 200 for every thing

 

[Dprio34]

Keep us posted with pics, Scott!

 

[4Ruster]

A lot of people successfully turbocharge these engines, however I prefer to stay NA.

I simply added a header and 2.5" mandrel bent exhaust with straight through mufflers. With this and a good quality air filter, the engine will breathe a bit better. You should then be able to adjust the fueling on the pump to give a bit more power.

An exhaust pyrometer setup might be a good idea too.

Below is a link to see my exhaust. I still need to add some more photos though.

http://gwareth.org/gallery/Cars/DauntsVolvo/vehicles/Hilux/exhaust/

How the hell do you drive a non turbo 2L? I can barely get up some hills without bogging down and blowing black.

Oops I see this is a 13 year old thread.