Cam 7A: AAN vs ADU

[Avtor]

All greetings. I know that this subject has been raised many times, but would like to look to the end.
I apologize for my English.
Here is the data in a phased manner:

ADU:
@1mm ventilhub & ventilspiel 0mm
IN open OT:n after 13 Grad 034109021AN IN close UT:n after 35 Grad
IN max hub 8.3 mm. 202
EX open before UT 24 Grad 034109022G EX close OT AFTER 1 Grad
EX max hub 9.5mm. 205
toothed belt pulley 034109105B
AAN & 3B:
IN open TDC OT:n after 3 Grad 034109021AN IN close BDC UT:n after 25 Grad
IN max hub 8.3 mm. 202
EX open before BDC UT 42 Grad 034109022D EX close BEFORE TDC OT 9 Grad
EX max hub 8.6 mm. 213
toothed belt pulley 034109105

7A:
IN open before TDC OT:n 6° 054109021 IN close BDC UT:n after 38°
IN max hub 9.6 mm. 224
EX open before BDC UT 42° 054109021 EX close before TDC OT 9°
EX max hub 10.5mm. 213

If we analyze these data, it is produced:
1) A intake turbocam (ADU and AAN) valve opens after TDC, but on the atmocamshaft (7A) valve opened up TDC. That is why torq e is lost. Since the exhaust gases enter into intake manifold.
2) Everyone knows that intake cam ADU and AAN the same. It is clear that the phase of the 7 A much wider intake cam, that is above its capacity. But there must shift its phase by 10 degrees. So do the same as has been done by professionals Porsche. You can shift the belt drive for a single tooth (7 degrees around). I think it works loss of torque.
3) Phase exhaust camshafts 7A and AAN the entire match can only favor at the expense of greater progress in the valve.
4) Citing a combination of different options camshafts:
a) intake AAN + exhaust 7А

IN open TDC OT:n after 3 Grad IN close BDC UT:n after 25 Grad
IN max hub 8.3 mm. 202
EX open before BDC UT 42° EX close before TDC OT 9°
EX max hub 10.5mm. 213
b) intake 7A + exhaust 7А + phase shift 7 degrees

IN open TDC OT:n after 1 Grad IN close BDC UT:n after 45 Grad
IN max hub 9.6 mm. 224
EX open before BDC UT 35° EX close before TDC OT 2°
EX max hub 10.5mm. 213

c) intake AAN + exhaust 7А + phase shift 7 degrees

IN open TDC OT:n after 10 Grad IN close BDC UT:n after 32 Grad
IN max hub 8.3 mm. 202
EX open before BDC UT 35° EX close before TDC OT 2°
EX max hub 10.5mm. 213

How do you think what option is best? What do you think about this?
Please forgive me if some mistaken.

[LHD_Kid]

I would also like to know a definitive answer to this...
I understand if you are after high power, then the 7a cams are excellent (especially exhaust) , but at the expense of some low down torque....
Mihnea would have answered this, but doesnt seem to be around any more, ever...
High rev breathing is improved with the more aggressive cams, but I would like to know if mapping can accomodate the 7a's without losing the low down torque, which I really want more than high end power.....
Hope somebody who knows comes in on this for the definitive answer......!!!!
Chris

[Avtor]

Most importantly, if dismiss phase at 7 degrees not forget the correct angles in ECU.

[Albert]

2) Everyone knows that intake cam ADU and AAN the same.

I have another info on ADU and AAN intake cam.

Audi 20V & 10V cam timings from Audi factory manuals
@1mm ventilhub & ventilspiel 0mm

ADU
IN open OT:n after 13 Grad
IN close UT:n after 35 Grad

AAN
IN open TDC OT:n after 3 Grad
IN close BDC UT:n after 25 Grad

[Avtor]

I have another info on ADU and AAN intake cam.

Audi 20V & 10V cam timings from Audi factory manuals
@1mm ventilhub & ventilspiel 0mm

ADU
IN open OT:n after 13 Grad
IN close UT:n after 35 Grad

AAN
IN open TDC OT:n after 3 Grad
IN close BDC UT:n after 25 Grad

All right - the same camshafts. Different chainrings drive. If you make chainrings drive, we can see that the slot under shponku slightly (to 10 degrees) refocused. In order not to buy RS2 chainrings, you can drive belt on one shift with the usual tooth chainrings (this is about 7 degrees ). 360 degrees/51 tooth chainrings drive =7,058

[caterpillar]

Mihnea would have answered this, but doesnt seem to be around any more, ever...
why this??? have he gone down under.......????

[Jamo]

I have another info on ADU and AAN intake cam.

Audi 20V & 10V cam timings from Audi factory manuals
@1mm ventilhub & ventilspiel 0mm

ADU
IN open OT:n after 13 Grad
IN close UT:n after 35 Grad

AAN
IN open TDC OT:n after 3 Grad
IN close BDC UT:n after 25 Grad

There is no difference in the inlet cams. The 10 % timing is done by the different cam wheel and the position of the magnetic pickup disk.

[newsh]

Mihnea would have answered this, but doesnt seem to be around any more, ever...
why this??? have he gone down under.......????

He's gone to RS246

[Avtor]

I think this is would be a very interesting option:
intake 7A + exhaust 7А + phase shift 14 degrees (shift belt drive for two tooth)

IN open TDC OT:n after 8 Grad IN close BDC UT:n after 53 Grad
IN max hub 9.6 mm. 224
EX open before BDC UT 27° EX close after 5 TDC OT
EX max hub 10.5mm. 213

So very similar to ADU, only a broader recovery phase valves above.
Very interested in your opinion.

[Pirvu Eugen]

Is an idea!!
Somebody knows?
I am interested too in finding a good option for high low down torque.
Thanks!
Eugen

[Audi_CQ]

Just remember that 1 cam tooth = 7 cam degrees = 14 crank degrees.......

Cams and cam timing also dependent on engine setup. Std engine has a lot of backpressure and doesn't like overlap. With ported head, tubular ex. manifold, large turbo the back pressure is a lot less and you can use cams with more overlap.

[Avtor]

Just remember that 1 cam tooth = 7 cam degrees = 14 crank degrees.......

360 degrees/51 tooth chainrings drive =7,058

[Avtor]

I think this is would be a very interesting option:
intake 7A + exhaust 7А + phase shift 14 degrees (shift belt drive for two tooth)

IN open TDC OT:n after 8 Grad IN close BDC UT:n after 53 Grad
IN max hub 9.6 mm. 224
EX open before BDC UT 27° EX close after 5 TDC OT
EX max hub 10.5mm. 213

So very similar to ADU, only a broader recovery phase valves above.
Very interested in your opinion.

Only need to be sure to move at 14 degrees phase sensor. How can this be done?

[Audi_CQ]

360 degrees/51 tooth chainrings drive =7,058

OK, but 7 or 7,058 what's the big deal Since crank is rotating at twice the speed one cam tooth = 14 (14,116 ) crank degrees.....

[Avtor]

intake 7A + exhaust 7А + phase shift 14 degrees (shift belt drive for two tooth)

IN open TDC OT:n after 8 Grad IN close BDC UT:n after 53 Grad
IN max hub 9.6 mm. 224
EX open before BDC UT 27° EX close after 5 TDC OT
EX max hub 10.5mm. 213


More views will be on the option?