164Q cams

[oz3litre]

Does anyone know how to recognize the higher performance 164Q cams? Is there a part number on them or do they have easily recognizable features to distinguish them from standard 3.0 litre cams?

[quadrifoglio]

Q and LS 24v cams are the same.

[oz3litre]

I'm talking about the difference between the Q cams and standard 3 litre 12 valve cams. In Australia the 164 Q was a five speed manual with a higher output 12 valve motor (215 HP I think). The cams had higher lift. I want to know how to recognize them.

[quadrifoglio]

Ah!

Can't help you then!

Not sure what the difference is between the regular 164 cams and the QV/S cams.

[GTV6PASSION]

OR are you thinking there are Q cams and GTA cams. What kind of car do you have?

[oz3litre]

I have a 1988 3 litre 75. I was told recently by someone who may have known the original owner that it had Q cams put in it, but I don't know if it is the case or not. It certainly goes well. I have to take the cam covers off in the next few days to replace the spark plug seals and I want to check the cams out, but I don't know what to look for.

[GTV6PASSION]

The Q are quad cams 2 intake 2 exhaust. It would be impossible to use quad cams in a 12v.

[oz3litre]

There might be some confusion with the model designation in different countries here. As far as I am aware there was a 12v car here with hotter cams and higher power and a manual gearbox. Most people call them a 164 Q in Australia. A friend of mine has one and it is definitely not a 24v. They are not very common because most 164s in Australia are autos. Those are the cams that are sometimes fitted to standard 12v engines to tweak them a bit.

[Alfissimo Int.]

Quote:

Originally Posted by oz3litre I have a 1988 3 litre 75. I was told recently by someone who may have known the original owner that it had Q cams put in it, but I don't know if it is the case or not. It certainly goes well. I have to take the cam covers off in the next few days to replace the spark plug seals and I want to check the cams out, but I don't know what to look for.

[joey]

yep, our Q cams are the 'S' cams referred to in the states.... different model naming b/w countries...What u are thinking about is the QV - quattrovalvole (4 valves)

corry can't help.. but good question....

[junglejustice]

Jason, not higher lift, longer duration BTW...

Any way - hey boss, what you are referring to are 164 "S" cams...

Within the earlier model range, the "S" version (here in the States) had a cam in it with slightly more duration and a standard lift. The 12 valve cars (from the carbureted Alfa Six, to the GTV6 2.5, to the South African GTV6 3.0, to the Milano/75 2.5 litre cars to the Milano Verde/Americano 3.0 litre found all over the world and then the early 164 cars (90 through 1993) all ran engines that at least generationally are part of the same "family" of engines - V6, 12 valve, single over-head cams per bank.

As far as I know (at least for the cars from GTV6 through Milano/75 and on to the 164 range), there were two basic cam profiles - Standard and then the "S" profile - known to you guys, Europe and South Africa as the QV 12 valve perhaps?

The S was the upper-end of 12 valve models and if indeed you have that cam in your 75, then yes, you have a bit more cam, but it is very mild. Claimed horsepower was 200 for the 164 S models over the 183-188 of the base 3.0 litre Milano/75 and early 164 cars however, that increase in horsepower was also attributable to higher compression pistons (10.0:1 in the S over the standard 9.5:1 of the base 164 and older Milano/GTV6 cars.)

Post the part numbers on the cams - that way you will find out for sure what you have!

As far as the later 24 valve generation 164 cars (1994 and 1995 here in the US) - they ran a 24 valve 4-cam motor and the cams are naturally NOT interchangeable with the older 12 valve engines! Cams were also the same for ALL of the models in this "family" of engines however, they did offer an upper end model (as with the S/QV for the earlier 12 valve cars) that was called the 164 Q.

The Q did NOT however have different cams in it, simply larger diameter intake runners with a claimed 18 horsepower improvement over a "base" 164 LS (Super to the rest of the world) 210 horsepower 24 valve engine.

[Alfissimo Int.]

Quote:

Originally Posted by junglejustice Jason, not higher lift, longer duration BTW...