1.2 8v VVT??

[ysidfa]

Hey,
Just reading through the wiki page for FIRE engines and saw this,
http://en.wikipedia.org/wiki/Fully_Integrated_Robotised_Engine#List_of_FIRE_engines

I dont know if the information im reading on Fiat integrating a Variable Valve Timing system into later SMPI engines is correct, but if it is, how do I find out if my car/other cars has it or not??


Tom

 

[arc]

It's just the 'starjet' engines. They retard the exhaust timing slightly when the engine is cold, this gets the cat hotter quicker so that it can meet emissions targets quicker.

So it is VVT, but not for performance.

 

[RuSZ]

ahh, but the StarJet is a 1.4 16v VVT.

according to the ever reliable source that is wikipedia, theres a 1.2 8v VVT

 

[dave]

isnt this why you cant time modern 8v fires like in the gp without tools?

 

[Venters]

69bhp 1.2 found in the 500 and newer Pandas is VVT.

 

[ysidfa]

69bhp 1.2 found in the 500 and newer Pandas is VVT.

*clicks like* ! Javascript error

Thanks alot IE6 -_-

FIRE engines are magic!

 

[Most Easterly Pandas]

69bhp 1.2 found in the 500 and newer Pandas is VVT.

None of the mk3 Panda's are I beileve. Possibly the mk4

 

[Venters]

Euro 5 Pandas.

 

[Most Easterly Pandas]

Euro 5 Pandas.

When did euro 5 come into the Panda? Was it the ones with updated rocker covers?

 

[Venters]

When did euro 5 come into the Panda? Was it the ones with updated rocker covers?

I want to say my2011.

 

[306maxi]

I'm fairly sure the 500 1.2 isn't vvt

 

[Venters]

I'm fairly sure your wrong.

 

[RuSZ]

I'm pretty sure the only VVT fiat engines are the 1.4l 16v but the newer one, The StarJet that came after the Panda 100HP. But that was only VVT on the exhaust cam.

The only other VVT that fiat do is the MultiAir which uses Hydralic lifters instead of cams so can have hundreds of timing combinations

Not sure they can do Variable timing on a 8v single OHC engine, since the cam do both intake and exhaust. Make the intake earlier you make the exhaust earlier (via pulley phasing) It would need to be twin lobe and that would mean cam shifting, similar to vtec, and pretty sure we would all know about it.

 

[Venters]

https://www.fiatforum.com/500/130035-1-2-versus-1-3-a.html

I enjoy being right, as much as I enjoy being correct.

 

[Most Easterly Pandas]

https://www.fiatforum.com/500/130035-1-2-versus-1-3-a.html

I enjoy being right, as much as I enjoy being correct.

Blocks look the same though. Surprised Fiat have kept it so quiet tbh.

 

[Venters]

They didn't keep it quiet. Just most of the public stuff was about the £30 a year road tax as opposed to how it got there.

 

[Most Easterly Pandas]

So they're (8v) still none interferance then.

 

[Venters]

Yeah.
The VVT is there purely for emissions, the extra power is derived from other means, higher compression and stuff.

So do not confuse the 1.2 500 with a vtec now.

 

[RuSZ]

how does it work on the 8V then?

cant be through betl timing. guessing tis through cam phasing (shifting). since there not hydralic (the MultiAirs)

How does it work on the StarJet 1.4 16v then?

 

[dave]

How does it work on the StarJet 1.4 16v then?

oil pressure, solenoid, valve, pushes spring loaded wet cam pulley out side around a little, the cams are connected so it varies the inlet cam timing even though its mounted on exhaust cam