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Do a search. It's been posted many times. And that's wrong i think ^^^ It's a simple on/off cam phasing type. Between 1400 rpm and 6500 rpm iirc.
They run like s**t when cold because of stringent emission control - They run as lean as possible when cold, hence why they're stuttery for a few minutes.
They run like s**t when cold because of stringent emission control - They run as lean as possible when cold, hence why they're stuttery for a few minutes.
Last edited:
Posted by Henk
VVT explained
Here is some additional info about the camshaft phase shift system as used on the Clio RS. (2000-2005)
The VVT system is only active after certain conditions are met, like coolant temperature / battery voltage etc.
Once these conditions are met , the ECU looks up engine load and rpm in a 3D table and activates/deactivates the cam shifter accordingly.
For the 182 that means VVT is active from 1450 to 6850 rpm and from light/moderate load to full load.
The 172 shifts back 150 rpm earlier. All settings can be changed as required.
As most of you know the VVT is a 2-step ON/OFF system. However the ECU is capable of sending a PWM signal which turns the solenoid on/off in 6 steps. From 25 - 100 % duty. Renault does for some reason, NOT implement this feature on the 2000-2005 models.
VVT explained
Here is some additional info about the camshaft phase shift system as used on the Clio RS. (2000-2005)
The VVT system is only active after certain conditions are met, like coolant temperature / battery voltage etc.
Once these conditions are met , the ECU looks up engine load and rpm in a 3D table and activates/deactivates the cam shifter accordingly.
For the 182 that means VVT is active from 1450 to 6850 rpm and from light/moderate load to full load.
The 172 shifts back 150 rpm earlier. All settings can be changed as required.
As most of you know the VVT is a 2-step ON/OFF system. However the ECU is capable of sending a PWM signal which turns the solenoid on/off in 6 steps. From 25 - 100 % duty. Renault does for some reason, NOT implement this feature on the 2000-2005 models.
Clio 220 lpg
Is this the same with the 197 engine?
Clio 220 lpg
Don't think so, it's def f4r engine
Fair enough didnt know that! To be fair I know diddly squat about them but was under the impression from what I'v heard its a completely different setup.
Only inlet last time I looked Fred...
Clio 220 lpg
had a bit of time to see whats different tonight and all there is are diff springs, inlet and exhaust cams on the head which suprised me
lemonnobby
ClioSport Club Member
I dont think the code is F4R on the 197 thought it was M4R
Tom
ClioSport Club Member
EV (s)
Nope, F4R 830
Induction Capacity (cc) 1998
Bore x Stroke 82.7 x 93
No of Cylinders/Valves 4 in line / 16
Compression Ratio 11.5 : 1
Maximum Power - kw ISO (hp DIN) 145 (197) to 7250
Maximum torque - Nm ISO (mkg DIN) 215 at 5550
Injection Type Multipoint Injection
Fuel Type Unleaded Petrol
Catalytic Converter Standard
Induction Capacity (cc) 1998
Bore x Stroke 82.7 x 93
No of Cylinders/Valves 4 in line / 16
Compression Ratio 11.5 : 1
Maximum Power - kw ISO (hp DIN) 145 (197) to 7250
Maximum torque - Nm ISO (mkg DIN) 215 at 5550
Injection Type Multipoint Injection
Fuel Type Unleaded Petrol
Catalytic Converter Standard
M
mini-valver
Yeah, just has a bigger bellhousing for the box but the code's still the same.
'07 Impreza, 182 sold now
though he answered anyway ?? typical of this forum which is why its crap :quiet: theres probably less than 5 people on here i would actually listen to!!
ValverInBits
you are correct Henk, oops, serves me right for not reading all the info! lol
:-0
Do you know of an existing technical note (NT....) Fred, specific for the F4R-830 ? Like there was for the F4R-730.
TVR Cerbera
172 phase 1
Posted by Henk
VVT explained
Here is some additional info about the camshaft phase shift system as used on the Clio RS. (2000-2005)
The VVT system is only active after certain conditions are met, like coolant temperature / battery voltage etc.
Once these conditions are met , the ECU looks up engine load and rpm in a 3D table and activates/deactivates the cam shifter accordingly.
For the 182 that means VVT is active from 1450 to 6850 rpm and from light/moderate load to full load.
The 172 shifts back 150 rpm earlier. All settings can be changed as required.
As most of you know the VVT is a 2-step ON/OFF system. However the ECU is capable of sending a PWM signal which turns the solenoid on/off in 6 steps. From 25 - 100 % duty. Renault does for some reason, NOT implement this feature on the 2000-2005 models.
Hi am running my 172 on 197 cams with a 8 degree advance and with a trumpet length of 27 whats best vvt activation range to be running then with this diffrent but fairly common modded cam setup on a standalone thats set currently for running simple on/off variation range? 1450 to ...... ???
