Injector Timing Table questions - Page 2

Sendero · 03-31-2005, 11:48 AM

Clint, does the Cam specifications affect the calculation for TDC in EEC Analyzer? Or is this a static number that happens at a set degree no matter the cam profile or engine size?

(I think I know the answer, but I want to make sure)

Sendero · 04-03-2005, 09:10 PM

for Clint.

86GT · 04-03-2005, 09:25 PM

it only affect the calculation if the PW time exceed the alloted time. If it does exceed the alloted time then the calculated degree will be backed off until it does fit or until the max intake duration.

So to answer the question it really only affects the calculations in the upper PW and RPMs.

Sendero · 04-03-2005, 09:35 PM

Quote:

Originally Posted by 86GT

it only affect the calculation if the PW time exceed the alloted time. If it does exceed the alloted time then the calculated degree will be backed off until it does fit or until the max intake duration.

Is this a EEC control function or something that is done within the program (EEC Analyzer)?

86GT · 04-03-2005, 09:52 PM

This is within the EA. The EEC knows nothing about the cam specs. The datalog is the telling factor. If your PW's are bigger than the cam intake duration then it will suggest a lower degree. Usually with aftermarket cams, they have a larger duration and the problem is not as evident. Its when higher RPMs and higher PW's the EA will back off the calculated degrees until the max duration is exceeded. It will then display "UP", meaning the injectors need to be larger.

03-31-2005, 11:48 AM	#11
Sendero Im gonna show her my... Join Date: Dec 2004 Location: Somewhere providing FREE tech support. Posts: 4,269	Re: Injector Timing Table questions Clint, does the Cam specifications affect the calculation for TDC in EEC Analyzer? Or is this a static number that happens at a set degree no matter the cam profile or engine size? (I think I know the answer, but I want to make sure) __________________ I heard it on the internet, so it must be true. "I believe that a person's moral compass can be determined by how he references free men the right to defend themselves." T. Nugent "An armed society is a polite society. Manners are good when one may have to back up his acts with his life." R. Heinlein "Never argue with an idiot. They drag you down to their level, then beat you with experience." -Unknown

04-03-2005, 09:10 PM	#12
Sendero Im gonna show her my... Join Date: Dec 2004 Location: Somewhere providing FREE tech support. Posts: 4,269	Re: Injector Timing Table questions for Clint. __________________ I heard it on the internet, so it must be true. "I believe that a person's moral compass can be determined by how he references free men the right to defend themselves." T. Nugent "An armed society is a polite society. Manners are good when one may have to back up his acts with his life." R. Heinlein "Never argue with an idiot. They drag you down to their level, then beat you with experience." -Unknown

04-03-2005, 09:25 PM	#13
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Re: Injector Timing Table questions it only affect the calculation if the PW time exceed the alloted time. If it does exceed the alloted time then the calculated degree will be backed off until it does fit or until the max intake duration. So to answer the question it really only affects the calculations in the upper PW and RPMs. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.

04-03-2005, 09:52 PM	#15
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Re: Injector Timing Table questions This is within the EA. The EEC knows nothing about the cam specs. The datalog is the telling factor. If your PW's are bigger than the cam intake duration then it will suggest a lower degree. Usually with aftermarket cams, they have a larger duration and the problem is not as evident. Its when higher RPMs and higher PW's the EA will back off the calculated degrees until the max duration is exceeded. It will then display "UP", meaning the injectors need to be larger. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.