about Diesel Performance And Fuel Saving System

[OztOmatO]

Hi, I'm new to 4X4, and I got a 2012 Hilux SR5, I heard there is a system can add on to the engine to power up and saving fuels, any now know about it? is it good for Hilux?

[T_Money]

Aftermarket chips which claim more power and fuel savings are not worth the risk. Most chips increase fuel pressures in a system which already runs 22,000psi in the common rail. The longevity of the pumps and seals running at these pressures are somewhat untested and as such not really worth thinking about (personal opinion only)

best thing you can get for a hilux is a nice free flowing exhaust. makes a world of difference and doesn't hurt the engine.

[Steven]

Common misconception (as seen here) is that aftermarket chips that increase fuel rail pressure somehow put more pressure on the pump etc. The pump is mechanical and always produces the same amount of pressure overall. There is a control valve in the common rail itself that drops the pressure down before it sends it to the injectors.

Pretty much the only part that will be exposed to (and is actually vulnerable to) the increased pressure after the rail are the injectors. Newer model injectors (ie from 08 onwards especially from 10 onwards) seem to deal with these pressures far better than the earlier models.

A chip that ups the boost as well as the fuel pressure is the bare minimum that you want though, as the increased boost helps keeps EGT low (high EGT = possible dead engine from overheating)
Some chips though increase fuel injector duration time rather than using increased pressure to inject more fuel - these are an even better chip again as they're very safe, however they don't have as much power/torque potential as the pressure type chips.

Though take any reported fuel savings with these chips with a grain of salt - there are only a very specific set of circumstances in which you will get better fuel economy, 99% of the time expect about an extra 1-2L per 100km in usage.
To get the best of both worlds and keep things very safe, find a chip that meets the above and can be turned on or off with a switch on the dash. There is no point running the engine with a chip all the time, if you just turn it on when you actually need it you will find the chip won't negatively affect your economy or engine/injector life expectancy.

By the way as you have a 2012 model, DO NOT GET A CHIP!!!! At least until you're out of warranty. If you suffer an engine failure for any reason, Toyota will blame the chip and void your warranty (has happened, even non-modded engines have failed randomly)
Even if you remove the chip prior to making a claim, Toyota have now figured out a few tricks to proving you have a chip even if you remove the system and reset the ECU. They've gotten very trick to deal with

[T_Money]

good thing i backed up my comment by stating personal opinion only Steve! :P

i still don't see the need for a chip. a hilux will never be fast even if it is chipped. at lest the exhaust is a safe option. EGT's will always be less with a free flowing exhaust. Should make the engine safer!

[Steven]

good thing i backed up my comment by stating personal opinion only Steve! :P

i still don't see the need for a chip. a hilux will never be fast even if it is chipped. at lest the exhaust is a safe option. EGT's will always be less with a free flowing exhaust. Should make the engine safer!

True, but the idea was to educate in case that misconception was affecting your own opinion (hate for you to miss out if it was just that lol)

I have a chip, does boost and pressure, on a switch. Believe it or not but the chip just on a mid-level tune makes the Lux a bucketload faster - it won't beat any v6 family taxi but for those times you need to merge out into heavy traffic or overtake on the freeway it makes a huge difference.

Spot on with EGTs being lower with a better exhaust, however if not running a chip then EGTs should never be a problem. The D4D hilux engine is very relaxed in its stock tune.

[Manxman]

LPG is, IMHO, too dangerous for automotive use, and with these diesels, is usually disabled below ~2000rpm. It does slightly improve economy, slightly raise motor temp and dramatically reduce some pollutants. If you're going to use it, you get the most benefit on long, hi-speed, hi-load runs, preferably not in extreme heat-caution with turbo motor induction temps!!!. For those mathematically inclined, you can replace between 5% and 30% of your energy with LPG energy, at the appropriate price difference. NB 1L of diesel ~=3.3KWhr. 1L of petrol ~=2.5-3.0KWhr. 1L LPG~=2.0KWhr(?)

From your fuel consumption/time, you know how much power you are producing, and can decide if your motor is big enough, or needs more work. Diesels will run at max load continuously, unlike most petrol engines.

[OztOmatO]

Common misconception (as seen here) is that aftermarket chips that increase fuel rail pressure somehow put more pressure on the pump etc. The pump is mechanical and always produces the same amount of pressure overall. There is a control valve in the common rail itself that drops the pressure down before it sends it to the injectors.

Pretty much the only part that will be exposed to (and is actually vulnerable to) the increased pressure after the rail are the injectors. Newer model injectors (ie from 08 onwards especially from 10 onwards) seem to deal with these pressures far better than the earlier models.

A chip that ups the boost as well as the fuel pressure is the bare minimum that you want though, as the increased boost helps keeps EGT low (high EGT = possible dead engine from overheating)

Some chips though increase fuel injector duration time rather than using increased pressure to inject more fuel - these are an even better chip again as they're very safe, however they don't have as much power/torque potential as the pressure type chips.

Though take any reported fuel savings with these chips with a grain of salt - there are only a very specific set of circumstances in which you will get better fuel economy, 99% of the time expect about an extra 1-2L per 100km in usage.

To get the best of both worlds and keep things very safe, find a chip that meets the above and can be turned on or off with a switch on the dash. There is no point running the engine with a chip all the time, if you just turn it on when you actually need it you will find the chip won't negatively affect your economy or engine/injector life expectancy.

By the way as you have a 2012 model, DO NOT GET A CHIP!!!! At least until you're out of warranty. If you suffer an engine failure for any reason, Toyota will blame the chip and void your warranty (has happened, even non-modded engines have failed randomly)

Even if you remove the chip prior to making a claim, Toyota have now figured out a few tricks to proving you have a chip even if you remove the system and reset the ECU. They've gotten very trick to deal with

thanks steven, help a lot, not waste money.