Anyone tried to appy Apexi SAFC or anything similar on their YARIIIII?? - Toyota Yaris Forums

oscarying · 10-07-2006, 03:33 AM

Does it work ??

Katana · 10-07-2006, 03:37 AM

Why to use it?

paultyler_82 · 10-07-2006, 03:48 AM

I beleive Power Enterprise's CamCon works on our car and can modify the VVT-i engagement points.

oscarying · 10-07-2006, 11:12 PM

Quote:

Originally Posted by Katana

Why to use it?

can't it make better fuel efficiency and can't it also make the VVTi activate earlier to give power rather than rev it??
i m not sure ..

Katana · 10-08-2006, 06:48 AM

Sounds nice idea.

ChinoCharles · 10-08-2006, 05:13 PM

Like a VTEC controller for Hondas, eh?

oscarying · 10-08-2006, 09:37 PM

Quote:

Originally Posted by ChinoCharles

Like a VTEC controller for Hondas, eh?

yes,exactly,but i m just not sure it can be applied on yaris or not...

EnduroMTS · 10-09-2006, 01:09 AM

Im almost positive it wotn help the Yaris much. We hooked up one on the Celica, VVTL-I GTS didnt do anything but actually cause problems. Might be different for the yaris, but If it works let me know :)

oscarying · 10-09-2006, 03:01 AM

Quote:

Originally Posted by EnduroMTS

Im almost positive it wotn help the Yaris much. We hooked up one on the Celica, VVTL-I GTS didnt do anything but actually cause problems. Might be different for the yaris, but If it works let me know :)

what problem does it cause?
i would like to make sure it helps before i buy it ...cause i know it helps on
Vtec engine,but just not sure it helps on VVTi or not

Katana · 10-09-2006, 06:43 AM

Ι think you won't have steady engine rpms.

oscarying · 10-09-2006, 08:34 AM

Quote:

Originally Posted by Katana

Ι think you won't have steady engine rpms.

but does it really help on fuel ratio and controlling the vvti ?
I 've seen people installed on ECHO on the nets before with the pen-shape turbo timer...why they installed a turbo timer on a NA echo...with SAFC...
i don't know...may be it gives a ricer impression??that's why i m asking since the SAFC has a good looking and if it really helps the engine i will go for it,
but if not..i won't

Katana · 10-09-2006, 08:49 AM

Without being a mechanic, I am of the opinion that it won't help.

firefly1_0 · 10-19-2006, 09:39 AM

there is a big difference between Vtec and VVt-i. an engine with a performance based thing like Vtec and an economy based thing like VVt-i place it in two different worlds.

think about how they both work. honda's will change the valve train to a bigger lift and bigger overlap at a specified RPM, it never changes unless you have an aftermarket ECU that you can change the engagement point.
VVt-i will only change the timing of each cam and its constantly evolving during engine operation.
you want more power in these things, buy a compresser, or swap in something else...

Katana · 10-19-2006, 11:44 AM

...exactly!

hosmer · 10-19-2006, 06:46 PM

VVTi - controlled by the TPS (throttle position sensor)

Vtec - controlled by engine RPMs

The VVTi advances timing and starts the valve overlap as soon as you put your foot (about) 3/4 of the way to the floor and returns to "normal" when cruising....theres no real way to change the engagement time

Vtec is a whole seperate cam profile where the camshft actually slides over to a more aggressive profile (Vtec camshafts have 3 sets of lobes for each cylinder). So with an aftermarket controller you can activate the aggressive cam profile sooner getting a bit more power

Toyota VVTi (1JZGTE) HKS cams:

Honda B16A cams (3 lobes per cylinder):

paultyler_82 · 10-19-2006, 07:57 PM

I know that overriding the ECU on Nissan engines to modify the CVVT helps performance, but maybe Nissan goes about things a different way, basically, CVVT advances the cams forward under heavy throttle to give more performance, until it senses knock, then it retards the cam back a bit.

cdydjded · 10-20-2006, 09:41 AM

Sorry guys but VTEC is not just an RPM function. It works with RPM's & an oil pressure activated solenoid. The solenoid opens @ the factory preset 4800 rpms which engages the 3rd lob on the cams. Just by engaging the VTEC funtion @ an earlier or later rpm will NOT give you more power unles you add more fuel. If the cam opens more (more lift) the motor needs more fuel. The advantage of a SAFC or the CamCo is really the ability to controll your engines fuel curve. If you put you car on a dyno & find that it is running lean or rich @ a certain rpm you can add or subtract fuel to fix you fuel curve.

Also VVTi does do the same as VTEC. VTEC is done with a 3rd lobe, VVTi is done with a sliding pin. Go here http://en.wikipedia.org/wiki/VVT-i if you want an exact explination.

firefly1_0 · 10-20-2006, 02:36 PM

i'm sorry,

there is a huge difference between valve overlap and bigger lift on a third lobe then there is in a variable overlap system like VVT-i.

VVT-i does nothing for adding more lift...

there is nothing that says that VVT-i adds power. VTEC does...

10-07-2006, 03:33 AM	#1
oscarying Drives: SLOOWZ Join Date: Aug 2006 Location: Sydney Posts: 56	Anyone tried to appy Apexi SAFC or anything similar on their YARIIIII?? Does it work ??

10-07-2006, 03:37 AM	#2
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	Why to use it? __________________ It's not the ride, it's the rider!

10-08-2006, 06:48 AM	#5
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	Sounds nice idea. __________________ It's not the ride, it's the rider!

10-09-2006, 06:43 AM	#10
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	Ι think you won't have steady engine rpms. __________________ It's not the ride, it's the rider!

10-09-2006, 08:49 AM	#12
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	Without being a mechanic, I am of the opinion that it won't help. __________________ It's not the ride, it's the rider!

10-07-2006, 03:48 AM	#3
paultyler_82 View User's Garage Drives: 07 Meteorite Metallic Yaris LB Join Date: Jul 2006 Location: USA Posts: 441	I beleive Power Enterprise's CamCon works on our car and can modify the VVT-i engagement points.

10-08-2006, 05:13 PM	#6
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	Like a VTEC controller for Hondas, eh?

10-09-2006, 01:09 AM	#8
EnduroMTS Drives: 2007 Toyota Yaris Join Date: Oct 2006 Location: Bay Area, CA Posts: 63	Im almost positive it wotn help the Yaris much. We hooked up one on the Celica, VVTL-I GTS didnt do anything but actually cause problems. Might be different for the yaris, but If it works let me know :)

10-19-2006, 09:39 AM	#13
firefly1_0 What the...? Drives: '06 Blazing Blue 3 door RS. Join Date: Oct 2006 Location: Edmonton Alberta Canada Posts: 88	there is a big difference between Vtec and VVt-i. an engine with a performance based thing like Vtec and an economy based thing like VVt-i place it in two different worlds. think about how they both work. honda's will change the valve train to a bigger lift and bigger overlap at a specified RPM, it never changes unless you have an aftermarket ECU that you can change the engagement point. VVt-i will only change the timing of each cam and its constantly evolving during engine operation. you want more power in these things, buy a compresser, or swap in something else... __________________ my other car is still faster... ...and the engine is way smaller. silly ricer, useless wings are for penguins...

10-19-2006, 11:44 AM	#14
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	...exactly! __________________ It's not the ride, it's the rider!

10-19-2006, 06:46 PM	#15
hosmer VVTrouble Drives: 07 Yaris LB...BS, MT, PP, ABS Join Date: Sep 2006 Location: Providence RI Posts: 23	VVTi - controlled by the TPS (throttle position sensor) Vtec - controlled by engine RPMs The VVTi advances timing and starts the valve overlap as soon as you put your foot (about) 3/4 of the way to the floor and returns to "normal" when cruising....theres no real way to change the engagement time Vtec is a whole seperate cam profile where the camshft actually slides over to a more aggressive profile (Vtec camshafts have 3 sets of lobes for each cylinder). So with an aftermarket controller you can activate the aggressive cam profile sooner getting a bit more power Toyota VVTi (1JZGTE) HKS cams: Honda B16A cams (3 lobes per cylinder):

10-19-2006, 07:57 PM	#16
paultyler_82 View User's Garage Drives: 07 Meteorite Metallic Yaris LB Join Date: Jul 2006 Location: USA Posts: 441	I know that overriding the ECU on Nissan engines to modify the CVVT helps performance, but maybe Nissan goes about things a different way, basically, CVVT advances the cams forward under heavy throttle to give more performance, until it senses knock, then it retards the cam back a bit.

10-20-2006, 09:41 AM	#17
cdydjded Drives: Yaris LB Turbo Join Date: Aug 2006 Location: Miami FL Posts: 782	Sorry guys but VTEC is not just an RPM function. It works with RPM's & an oil pressure activated solenoid. The solenoid opens @ the factory preset 4800 rpms which engages the 3rd lob on the cams. Just by engaging the VTEC funtion @ an earlier or later rpm will NOT give you more power unles you add more fuel. If the cam opens more (more lift) the motor needs more fuel. The advantage of a SAFC or the CamCo is really the ability to controll your engines fuel curve. If you put you car on a dyno & find that it is running lean or rich @ a certain rpm you can add or subtract fuel to fix you fuel curve. Also VVTi does do the same as VTEC. VTEC is done with a 3rd lobe, VVTi is done with a sliding pin. Go here http://en.wikipedia.org/wiki/VVT-i if you want an exact explination.

10-20-2006, 02:36 PM	#18
firefly1_0 What the...? Drives: '06 Blazing Blue 3 door RS. Join Date: Oct 2006 Location: Edmonton Alberta Canada Posts: 88	i'm sorry, there is a huge difference between valve overlap and bigger lift on a third lobe then there is in a variable overlap system like VVT-i. VVT-i does nothing for adding more lift... there is nothing that says that VVT-i adds power. VTEC does... __________________ my other car is still faster... ...and the engine is way smaller. silly ricer, useless wings are for penguins...