1NZ-FE tuned by Phoenix-r - Toyota Yaris Forums

Parmas · 01-29-2010, 09:25 AM

Reviding the pictures I could answer my own questions....

The engine can't be used with forced induction because of the ""auxiliary intake induction system" since boosted air will be forced out instead. Saying this...... so why using lower compression pistons on an N\A engine cause you will only loose power that way. If you want to change pistons it would be better to plan for slightly higher compression ones keeping in mind good valve clearance.

Also ... what about fuel injectors? Are they still stock?

sujonol78 · 01-29-2010, 10:47 PM

Quote:

Originally Posted by Parmas

Reviding the pictures I could answer my own questions....

The engine can't be used with forced induction because of the ""auxiliary intake induction system" since boosted air will be forced out instead. Saying this...... so why using lower compression pistons on an N\A engine cause you will only loose power that way. If you want to change pistons it would be better to plan for slightly higher compression ones keeping in mind good valve clearance.

Also ... what about fuel injectors? Are they still stock?

yes the engine can still use forced induction, because the there are 1 way valves in the auxiliary intake induction system ( the forced air can not escape through the valves ). My tuner do many forced induction cars with the auxiliary induction system.

i don't think the piston is that low compression, i will re-check again.

the fuel injectors are still stock but i clean it periodically.

sujonol78 · 01-29-2010, 11:24 PM

the dyno was on the engine.

sujonol78 · 01-29-2010, 11:28 PM

we can not judge a piston by just its' appearance, there are other influencing factors too. for the piston that i use, it is not as low as it seems, but also not as high as you might think. it depends on the other supporting factors and tuning. the end results for my piston is slightly touching the high compression area.

TOUGEghost · 01-29-2010, 11:53 PM

So it's like you gave yourself a whole bunch of vacuum leaks with all the unmetered air from the butt dyno tuned "auxiliary air intake" system, although I really can't see much air actually getting through all those tiny little tubes, filters, and valves anyway.

Quote:

Originally Posted by sujonol78

132HP was on Apexi, TRD clutch ( original ), auxiliary intake, JFC filter, and custom muffler only.

You're claiming you got about 23hp from an AFC, air filter, and a muffler?

sujonol78 · 01-29-2010, 11:59 PM

Quote:

Originally Posted by TOUGEghost

So it's like you gave yourself a whole bunch of vacuum leaks with all the unmetered air from the butt dyno tuned "auxiliary air intake" system. Although I really can't see much air actually getting through all those tiny little tubes, filters, and valves anyway.

don't worry, a lot of people don't believe it either, but once you have tried it, then it is a completely different story

sujonol78 · 02-01-2010, 02:18 AM

Quote:

Originally Posted by TOUGEghost

So it's like you gave yourself a whole bunch of vacuum leaks with all the unmetered air from the butt dyno tuned "auxiliary air intake" system, although I really can't see much air actually getting through all those tiny little tubes, filters, and valves anyway.

You're claiming you got about 23hp from an AFC, air filter, and a muffler?

yes

sujonol78 · 02-01-2010, 02:53 AM

i respect all the things you've done to increase the performance of your engine, i even learn something good from this forum. i never said it is a mistake, i never said that the things i did with my engine is the only "right" way. please understand the difference between tuning and modifying ( or even "replacing" ). yes, the stock engine holds a great potential without having to modify or replacing it with performance parts, so that's why we ( my tuner and i ) are exploring the hidden potentials, and i have shown you the results without any exaggerations or lies.

the same dispute also occurs in my country, so no harm done.
now you know there are "unconventional" ways to explore the hidden potentials with, if i may say, a more efficient way.

PS: I'm not from Puerto Rico, I haven't done anything to the stock ECU, and the PCV valves really works, and I don't care for popularity.

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01-29-2010, 09:25 AM	#1
Parmas Drives: Vitz RS Turbo Join Date: Nov 2008 Location: ML Posts: 577	Reviding the pictures I could answer my own questions.... The engine can't be used with forced induction because of the ""auxiliary intake induction system" since boosted air will be forced out instead. Saying this...... so why using lower compression pistons on an N\A engine cause you will only loose power that way. If you want to change pistons it would be better to plan for slightly higher compression ones keeping in mind good valve clearance. Also ... what about fuel injectors? Are they still stock?

01-29-2010, 11:24 PM	#3
sujonol78 Drives: 1nz-fe / MT Join Date: Dec 2009 Location: Indonesia Posts: 26	the dyno was on the engine.

01-29-2010, 11:28 PM	#4
sujonol78 Drives: 1nz-fe / MT Join Date: Dec 2009 Location: Indonesia Posts: 26	we can not judge a piston by just its' appearance, there are other influencing factors too. for the piston that i use, it is not as low as it seems, but also not as high as you might think. it depends on the other supporting factors and tuning. the end results for my piston is slightly touching the high compression area.

02-01-2010, 02:53 AM	#8
sujonol78 Drives: 1nz-fe / MT Join Date: Dec 2009 Location: Indonesia Posts: 26	i respect all the things you've done to increase the performance of your engine, i even learn something good from this forum. i never said it is a mistake, i never said that the things i did with my engine is the only "right" way. please understand the difference between tuning and modifying ( or even "replacing" ). yes, the stock engine holds a great potential without having to modify or replacing it with performance parts, so that's why we ( my tuner and i ) are exploring the hidden potentials, and i have shown you the results without any exaggerations or lies. the same dispute also occurs in my country, so no harm done. now you know there are "unconventional" ways to explore the hidden potentials with, if i may say, a more efficient way. PS: I'm not from Puerto Rico, I haven't done anything to the stock ECU, and the PCV valves really works, and I don't care for popularity.