Stock Cam Duration?
1 - 6 of 6 Posts
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
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
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).Ebanks said:That's wild.. I would expect the timing to be retarded on the turbo... I guess that is why I am not an engineerI also think it is pretty bizarre that they are the same specs, weird!
-Ethan
Heh....
Andi
1 - 6 of 6 Posts
Join the discussion
Recommended Reading
-
Manu light randomly turns on (not the blinking manu light issue)
MKIV TechnicalThe car is a 94 Supra turbo automatic with 215k miles. for the third time in two days, the manu light has come on without the button being pressed. The light will turn off if I press the manu button. Drivability does not seem to be affected although only a few miles have been driven since this...- 7
- 1K
-
Manu light randomly flashes at random times.
MKIV TechnicalManu light randomly flashes at random times. Its not sequenced in any type of ways. Let's say I'm just driving normal and it will come one then a few minutes later it will just go off. Or it may come on for a few seconds. Or it may just blink two times. Also sometimes the manual button does...- 0
- 0
-
94tt v10killer · updated
-
No power to fuel pump
MKIV TechnicalI have no power to fuel pump or diagnostic. I know I get power from efi main relay. Bench tested relay and I good. Checked resistance for ground and that is good. But voltage coming from the ECU is only putting out about 7 volts to the relay which isn’t enough to kick over the relay coil...- 5
- 106
-
Blinkers not functioning
MKIV TechnicalHi so my blinkers have been out on my 94 mkIV turbo for years.... hazards work and left blinker works but if I click the right blinker the flasher makes a horrible noise and it doesn’t work.. 84329-14030 looks like the part number to the blinker switch but it’s dicontinued.. Not sure if I...- 13
- 150
-
iwannaTT · updated
-
Banjo bolt on fuel pump won't budge - ok to use impact wrench?
MKIV TechnicalGreetings, I'm having trouble removing the banjo bolt on the fuel pump assembly. Tried everything I could think of besides an impact wrench. Wanted to ask some folks if that was a good idea or not? I'd really appreciate any insight you can offer. To be clear and avoid miscommunication I found...- 16
- 321
Join now to ask and comment!