[Ebanks]

Does anyone know the lift and duration on cams from a stock n/a automatic? This info would benefit me a lot right now.

Thanks,

Ethan

 

[Grant]

That info should be in the NCF. Its on mkiv.com under specifications, although the site is down right now.

 

[Ebanks]

Really? They have the info on N/As?

-Ethan

 

[Andi]

Luckily I have a '93.5 Supra NCF...

2JZ GTE:
Intake opens at 3deg BTDC, closes at 50 deg ABDC
(intake duration is thus 233 degrees)
Exhausut opens at 52 deg BBDC, closes at 4 deg ATDC
(exhaust duration is thus 236 degrees)

2JZ GE:
Intake opens at 3deg BTDC, closes at 50 deg ABDC
(intake duration is thus 233 degrees)
Exhausut opens at 53 deg BBDC, closes at 3 deg ATDC
(exhaust duration is thus 236 degrees)


...notice that according to the book, autos and manuals have the same cams.. and the turbo and NA have the same duration, except that the NA's exhaust timing is retarded by 1 degree compared to the TT's.

Andi

 

[Ebanks]

That's wild.. I would expect the timing to be retarded on the turbo... I guess that is why I am not an engineer I also think it is pretty bizarre that they are the same specs, weird!

-Ethan

 

[Andi]

That's wild.. I would expect the timing to be retarded on the turbo... I guess that is why I am not an engineer I also think it is pretty bizarre that they are the same specs, weird!

-Ethan

Maybe that's why I gained power by retarding my exhaust camshaft by 4.5 marks (equal to 4.5 cam degres or, in crank degrees as cam duration is quoted, 9 degrees).

Heh....

Andi