20v Camshaft ( cam ) durations inlet and exhaust

[Faheemo]

Gr8 now we have 3 different sets of data for the 7a cams.
Can anyone confirm which data is correct ?

[Flat on my back]

At the moment...

This was the actual measuered data on the 7a cam

Inlet:
Opens 6° AFTER(not before) TDC, closes 38° ABDC, duration 212°, lift 9,6mm.

Thanks Audi CQ

[Audi_CQ]

Gr8 now we have 3 different sets of data for the 7a cams.
Can anyone confirm which data is correct ?

I've measured two sets of cams and they both gave same data as posted earlier:

Inlet:
Opens 6° AFTER(not before) TDC, closes 38° ABDC, duration 212°, lift 9,6mm.
Ex.
Opens 42° BBDC, closes 3° BTDC, duration 219°, lift 10,3mm

Myth busted

Cheers,
Roger

[Faheemo]

I've measured two sets of cams and they both gave same data as posted earlier:

Inlet:
Opens 6° AFTER(not before) TDC, closes 38° ABDC, duration 212°, lift 9,6mm.
Ex.
Opens 42° BBDC, closes 3° BTDC, duration 219°, lift 10,3mm

Myth busted

Cheers,
Roger

How do you measure the cams ?

The new data means that thers no overlap in the 7a cams.
also the duration is less than what was originally thought b4.
can the inlet cam now be advanced say 6 deg ( with individual cam sprockets ) will this improve low speed torque ? (still no overlap)

Or alternatively what would be the best settings with indivdual adjustable cam sprockets to :
1. maximise hi speed power
2. Maximize low speed torque.
(not related together)

[Albert]

Faheemo if you want to maximise aceleration than you have to maximise hi rev torque

[Faheemo]

Faheemo if you want to maximise aceleration than you have to maximise hi rev torque

Understood - What do i need to do WRT advancing or retarding the 7a cams to maximise the acceleration. ( I have adjustable cam sprockets)

Inlet cam data as we now know is :
AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
ADU___________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
Opens 6° AFTER ATDC, closes 38° ABDC, duration 212°, lift 9,6mm.

All this cam data is confusing me, as i understand it-
ADU Inlet cams are 10deg retarded to give less lag WRT aby,3b cam
7a cam gives more lag due to longer duration higher lift but is retarded 3 deg compared to ABy, 3b ,AAN. ?

can i advance 7a cam to give more hi speed torque.
similarly what can be done to Ex cam to maximise acceleration ?
Not worried about lag.

[Audi_CQ]

How do you measure the cams ?

The new data means that thers no overlap in the 7a cams.
also the duration is less than what was originally thought b4.
can the inlet cam now be advanced say 6 deg ( with individual cam sprockets ) will this improve low speed torque ? (still no overlap)

Or alternatively what would be the best settings with indivdual adjustable cam sprockets to :
1. maximise hi speed power
2. Maximize low speed torque.
(not related together)

The NM (2.0 20v) has the same inlet cam as 7A but 6 degrees advanced (open at 0 close 32ABTC). Could give better low speed torque, but really need a dyno to be sure

Measure cams like this with a degree wheel mounted to the crank:

[Jamo]

The NM (2.0 20v) has the same inlet cam as 7A but 6 degrees advanced (open at 0 close 32ABTC). Could give better low speed torque, but really need a dyno to be sure

Measure cams like this with a degree wheel mounted to the crank:

I'll be running both NM inlet and exhaust in my car later this year, hoping for good results.

[Audi_CQ]

I'll be running both NM inlet and exhaust in my car later this year, hoping for good results.

Keep us posted with results

[Tommy200rs]

Here interesting cam values of the stroker TT RS: 10,7mm and 10mm lift. Cam opening times also here.

[Jamo]

Redone info

Inlet

AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
ADU___________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
NM ___________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
7A____________ Opens 6° ATDC, closes 38° ABDC, duration 212°, lift 9,6mm


Exhaust

AAN, ABY, 3B__ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
7A___________ Opens 42° BBDC, closes 3° BTDC, duration 219°, lift 10,5mm

[Wizard-of-OD]

Redone info

Inlet

AAN, ABY, 3B___ Opens 3° ATDC, closes 25° ABDC, duration 202°, lift 8,3mm
ADU___________ Opens 13° ATDC, closes 35° ABDC, duration 202°, lift 8,3mm?
NM ___________ Opens 0° ATDC, closes 32° ABDC, duration 212°, lift 9,6mm?
7A____________ Opens 6° ATDC, closes 38° ABDC, duration 212°, lift 9,6mm


Exhaust

AAN, ABY, 3B__ Opens 42° BBDC, closes 9° BTDC, duration 213°, lift 8,6mm
ADU__________ Opens 24° BBDC, closes 1° ATDC, duration 205°, lift 9,5mm
NM __________ Opens 35° BBDC, closes 3° BTDC, duration 212°, lift 9,6mm
7A___________ Opens 42° BBDC, closes 3° BTDC, duration 219°, lift 10,5mm

Jamo
did you ever get a decent dyno chart for NM cams?