Air Intake Enhancements for Diesel Engines

[sniffmydiff]

Hey guys,

I am trying to squeeze more horsepower from my Isuzu Bighorn with 4JG2 intercooler turbo diesel engine. My first instinct is to change the stock air filter with less restrictive one, preferably that of K&N brand. I contacted speedlab*speedlab.com.ph, a local distributor of K&N air filter. Sad to say they don't have stock replacements anymore. However, they offer K&N open-type air filter with minor modifications in the air intake setup at P7,500.00. They claimed it could add more horsepower than that of stock air cleaner replacement. Is anybody among us here have tried Speedlab's air intake modifications. Comments for those who tried are very much welcome. Other modifications that could add more hp and fuel economy especially for 4JG2 engine will be very much appreciated.

[lytspid]

sir,
to add more power to yuor existing engine is open up the intake and exhaust adding an aftermarket filter will make the engine ingest more air next yuo need to get larger diameter pipes for yuor exhaust system and use a free flowing muffler, if yuo have an intercooler try to clean it becuase years of use may have cause some oil to settle into it restricting the passages,,another form of adding horsepower is by chemical intercooling which we are distributing.it has been tested here and in the US..water/methanol injection..safer to use and less maintenance than a nitrous system..horsepower levels depends on the mixture..the price of each system dpnds on the application..for more info pm lng so i can explain it how the system works..

[niky]

Medyo mahal yung pipes ng speedlab, but then, anything stainless is expensive nowadays, and their workmanship is good.

An open type K&N should net you about 4-5 hp and a bit more midrange torque, but the biggest gains from intake modification would be via your intercooler. Upgrading to a bigger front-mount should net you a 5-10 hp gain, even without exhaust modification.

[mbeige]

If you know how to mess with your engine's fuel input and turbocharger boost control/wastegate mechanism, that's probably the surest way.

[rion]

If you know how to mess with your engine's fuel input and turbocharger boost control/wastegate mechanism, that's probably the surest way.

not only the surest way, but also the cheapest way.

also messing with the EGR helps. although Al gore will not like it.

[IMm29]

An open type K&N should net you about 4-5 hp and a bit more midrange torque, but the biggest gains from intake modification would be via your intercooler. Upgrading to a bigger front-mount should net you a 5-10 hp gain, even without exhaust modification.

Got the same inputs from Auto_Xer/Ferman a year or two back. Have to replace the stock, basket-type, top-mounted intercooler with a larger front-mount intercooler. A friend in South Africa did the same to his version of our Isuzu Fuego, and was he raving about the benefits.

[niky]

Yup. Top-mounts really don't cool efficiently, since the scoop isn't often designed properly, and, as pressure builds up in the engine bay, vent hot air out through the scoop at speed... negating any cooling effects.

[IMm29]

Dang, if the intercooler upgrade just didn't cost too much. Oh well.

O nga pala, sniffmydiff, have you tried scouting around for performance chips? Also, read on a different board about a spray. Forgot what it's composed of tho.

[saulctg]

interested din ako sa engine modification for more horse power and torque.

which one is more available in local market , air intake or turbo mod?