The dyno graph isnt upside down.

 

Yes it is.

Dann

 

It would be for you, we see things right side up here.

 

Nah, its the right way up from here so it must be upside down over there.
See?



Dann

 

if you tuned it, it would be making 7523 ft-lbs and be posted upside down.

wasn't there another issue with an STP dyno posted here? Oh yeah, it was another TDR car when he posted here and we didnt give a ****.

 

Haha!

Colin Hay is performing tonight over here in Largo, Florida. I wondered if he would be more comfortable playing guitar while standing on his head.

 

That is the TUNING section, there will be no discussions of tuning!

 

You KNOW it.



By the way I asked for some measured data on VVT over there.

Is VVT usually capable of being tuned as opposed to just switched on and off at different RPM? I was under the impression that all VVT ran from oil pressure on a solenoid, or is that Oldschool now?

What components allows the VVT angle to be changed as opposed to open and closed?

Dann

 

the stock ones.

 

... That doesn't explain anything at all.

Cheers,
Dann

 

vvt is not vtec. It normally works with some sort of mechamism that allows the angle of the cam to change relatively to the cam pulley.

 

I understand that fully, its usually powered by oil pressure and that pressure is controlled with a solenoid, I just cannot think of how the 'new modern' way of doing it that allows it to be stepped in angle, as opposed to naturally sit in one setting on a stop, and then have oil pressure push it to the stop a few degrees around.

Dann

 

the solenoid turns on and off very quickly, just like boost control you dont think an ebc has only wastegate pressure or ALLOFIT do you?

 

True variable VVT (IE, not an on/off switch) has been around for quite some time.

 

No, but having pulled apart VVT setups before I just dont see that accurately controlling angle, I mean, against something as irregularly shaped as a cam at xyz rpm and you are just going to PWM it to a specific angle with constantly changing oil pressure?

Dann

 

Awesome, do you know how it works?

Dann

 

Yes, because closed loop controls are awesome.

 

I don't know how it works on the NC, because i don't have an NC, and therefor, i don't care.

 

Lol.

if someone knows or has a link to some pics Id be very interested, I have an NC racecar parked 4 metres from me right now, but I dont really want to pull it that far down and risk having to replace seals and **** just to understand.

Dann

 

sounds similar to honda's i-vtec





I'm trying to find the video I saw once that uses pneumatic valves which allows all valves in the head to be independently controlled from each other unlike a camshaft. It's a true Variable Valve Timing system. Pretty neat stuff. Just can't remember what the video was titled


EDIT: Found it