compilation of technical info

[phatvw]

Quote, originally posted by koko5869 »

i was thinking each cam has a different profile? but that doesn't make much sense either.

On the intake cam, there are 12 lobes - are all 12 lobes the exact same shape with the exact same timing? Or do 6 have one timing profile and 6 different profile? Whoever measured these cams, didn't account for the 15° V and rocker-arm arrangement to measure effective lift/duration when installed. They measured it as if it were an inline-6.

The 24v should have four different cam profiles, intake & exhaust for front-bank cylinders; intake & exhaust for rear-bank cylinders. This arrangement compensates for the ~3" difference in intake runner length - just like the MKIV 12v engine. If this were not the case, then it would basically be 2 three-cylinder engines with two entirely different torque peaks which would be horrible for tuning and longevity.

So who knows the REAL "as-installed" data with these cams and not just the measured numbers off the bench????

Modified by phatvw at 9:59 AM 12-5-2007

[ketch360]

[FliGi7]

And, at what lift are these cam numbers measured?

[koko5869]

Quote, originally posted by koko5869 »

OEM Cam Specs. .........................................Intake... ..........Exhaust Clearance [cl].....................0.00mm...........0.00mm Duration [0.1mm+cl].............272°................258° Duration [1.0mm+cl].............211°................207° Valve Lift [cl=0]..................9.85mm...........9.90mm Cam Lift............................4.95mm...........4 .95mm Peak Angle..........................110°............... .110° Timing [1.00mm+cl]...........-5/36°..............36/9° Lift @ TDC.........................0.65mm...........0.45m m *note - audi TT 3.2L, the R32, and 2.8L 24v all share the same cams.

as far as i know, thats the lift theyre measured at.
can someone else second this?

[PowerDubs]

[koko5869]

keepin it up
since apparently theres no 24v love from any mods.


Modified by koko5869 at 10:31 AM 12-11-2007

[kungfoojesus]

Quote, originally posted by koko5869 »

i was thinking each cam has a different profile? but that doesnt make much sense either.

its so you can have cam overlap, hence the adjustable cams in these cars

even guys that don't have vvt still run dif profile cams...

[koko5869]

thank ya.

dear moderator gods of the vortex, sticky mah stuff.

[koko5869]

keepin it topside

[FliGi7]

Can't die, won't die.

[koko5869]

die you say?
NEVERRRRRR!

[kieskaman]

I thought we were suppose to use 0w40

[koko5869]

i believe 0-40 is the new cool european blend that some comanies have come out with. but its not listed in the manual.
5w-40 and if thats not available, 5w-30 works.
0w-40 will do you just fine.

[raceware]

Some of the latest oils - as of 10/07, that meet specific VW oil specs. many of these products are NOT available in the U.S.

http://www.usr32registry.org/d...7.pdf

Look at the bottom of this thread for a summary of oils available in the U.S. that meet VW specs. as of 12/21/07.

http://forums.vwvortex.com/zerothread?id=3596454



Modified by raceware at 10:02 PM 12-24-2007

[koko5869]

up top.

[PowerDubs]

More tech stuff...

http://forums.vwvortex.com/zerothread?id=3603164

[BakBer]

Quote, originally posted by koko5869 »

i believe 0-40 is the new cool european blend that some comanies have come out with. but its not listed in the manual. 5w-40 and if thats not available, 5w-30 works. 0w-40 will do you just fine.

Mobil 1 0w-40, 5w-40
Castrol 5w-40

I have used all of these and they all have the same VW 501 or 505 approved...I think that is the number. Either way they are approved replacements for the VW oem oil.

[BakBer]

Quote, originally posted by FliGi7 »

I just don't understand the layout, I suppose. Is it saying one cam is a 272/258 while the second is a 211/207?

this is saying that the intake and exhaust lobes have different durations

the intake duration is 272deg at 0.1mm lift
the intake duration is 211deg at 1.0mm lift

the exhaust duration is 258deg at 0.1mm lift
the exhaust duration is 201deg at 1.0mm lift

intake and exhaust lobes are found on both cams but the intake and exhaust both have a separate set of durations

For anybody that didn't know the duration is a measurement of how long the lifter rides on the cam lobe. In other words it is how long the valve is open.

[FliGi7]

Got it, didn't see the distinction between the 0.1 and 1.0 lift numbers. Understood now.

[PhReE]

Anyone know how much coolant it takes to refillt it all after a flush? Thx

[BakBer]

Quote, originally posted by PhReE »

Anyone know how much coolant it takes to refillt it all after a flush? Thx

1 gallon of G12 + 1 gallon of distilled water = that is all

[BakBer]

Today at work I made a drawing of the 2.8l 24V VR6 Thottle Body Flange...here's a pic

These are the measurements from the throttle body. One could use this to machine a flange for a SRI or any other part to bolt up our throttle body.


Modified by BakBer at 6:37 PM 1-4-2008

[PowerDubs]

Why is this not sticky?

[FliGi7]

B/c no one seems to care about our VRsucks

[subrosasix]

Quote, originally posted by PowerDubs »

Why is this not sticky?

i think it's because theres alot of hear say in the thread. not all of the info but a good amount.

[FliGi7]

Quote, originally posted by subrosasix »

i think it's because theres alot of hear say in the thread. not all of the info but a good amount.

Where?

[BakBer]

Quote, originally posted by PowerDubs »

Why is this not sticky?

Hey Mr. Rictus! Make the mans wish come true.

[stylus]

could we get this stickied?

[vr6jettagli]

NICE GOOD INFO

[need_a_VR6]

Quote, originally posted by koko5869 »

OEM Cam Specs. .........................................Intake... ..........Exhaust Clearance [cl].....................0.00mm...........0.00mm Duration [0.1mm+cl].............272°................258° Duration [1.0mm+cl].............211°................207° Valve Lift [cl=0]..................9.85mm...........9.90mm Cam Lift............................4.95mm...........4 .95mm Peak Angle..........................110°............... .110° Timing [1.00mm+cl]...........-5/36°..............36/9° Lift @ TDC.........................0.65mm...........0.45m m *note - audi TT 3.2L, the R32, and 2.8L 24v all share the same cams.

I never noticed this before but if you go by the VW chart above the duration at 1mm should be 205/205

[Zupek]

does a r32 intake manifold work on a 2.8 24v head?

[Mr. Rictus]

Quote, originally posted by Zupek »

does a r32 intake manifold work on a 2.8 24v head?

No.

[Zupek]

is an adapter plate possible?

[Mr. Rictus]

Quote, originally posted by Zupek »

is an adapter plate possible?

Not worth it... better question is, why? Just get a 24v intake manifold instead of having to get a 3.2L throttle body and an adaptor plate.

[Zupek]

well my 2.8 is already a frankenstein since it dbc and runs on a 12v ecu...

Change over valve is vacuum operating like the shrick 12v's?


Modified by Zupek at 1:22 PM 4-3-2009