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

oscarying · 10-07-2006, 04:33 AM

Does it work ??

Katana · 10-07-2006, 04:37 AM

Why to use it?

paultyler_82 · 10-07-2006, 04:48 AM

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

oscarying · 10-08-2006, 12:12 AM

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, 07:48 AM

Sounds nice idea.

ChinoCharles · 10-08-2006, 06:13 PM

Like a VTEC controller for Hondas, eh?

oscarying · 10-08-2006, 10:37 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, 02:09 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, 04:01 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, 07:43 AM

Ι think you won't have steady engine rpms.

oscarying · 10-09-2006, 09:34 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, 09:49 AM

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

firefly1_0 · 10-19-2006, 10:39 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, 12:44 PM

...exactly!

hosmer · 10-19-2006, 07:46 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, 08:57 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, 10:41 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, 03:36 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, 04:33 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, 04:37 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, 07:48 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, 07:43 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, 09:49 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, 04:48 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, 06:13 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, 02:09 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, 10:39 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, 12:44 PM	#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, 07:46 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, 08:57 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, 10:41 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, 03:36 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...

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode