Why stock lobe separation so high? (89 GTA)
11-14-2002, 10:36 AM
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Why stock lobe separation so high? (89 GTA)
305 5spd / 350 AT 10066049* .415 .430 207 213 117.0 (116/-118
Information from tech board. The 117 lobe sep. Why so high?
Also, somebody please translate the 116/-118. Supposed to be rocker arm ratio. What's the dimensions on that?
edit: fixed some english for the professor
Information from tech board. The 117 lobe sep. Why so high?
Also, somebody please translate the 116/-118. Supposed to be rocker arm ratio. What's the dimensions on that?
edit: fixed some english for the professor
Last edited by GTAracer; 11-14-2002 at 01:44 PM.
11-14-2002, 10:42 AM
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Car: 4
Engine: 6
Transmission: 5
The high lobe separation helps emissions and smooths the idle. Lower lobe sep gives higher (but usually peakier) torque, and a choppier idle which is not acceptable to the majority of the new-car buying public.
The other numbers you mentioned are the lobe centers, referenced to TDC. The exhaust reaches max opening at 116° BTDC, the intake at 118° ATDC. They have nothing to do with rocker arm ratio.
The other numbers you mentioned are the lobe centers, referenced to TDC. The exhaust reaches max opening at 116° BTDC, the intake at 118° ATDC. They have nothing to do with rocker arm ratio.
11-14-2002, 11:59 AM
#3
Re: Why stock lobe separation so high? (89 GTA)
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"Arguing on the Internet is like competing in the Special Olympics. Even if you win, your still retarded."
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11-14-2002, 12:53 PM
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11-17-2002, 03:09 AM
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OOOOOOHHHHH my Gosh
Rezin,
Sure hope he wasnt a relative of someone on this board. It could definately offend someone. It is the way some people act on this forum though sad to say.
Sure hope he wasnt a relative of someone on this board. It could definately offend someone. It is the way some people act on this forum though sad to say. 
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11-19-2002, 11:41 AM
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Laiky,
They are gold. 16" Never measured width. Tires on them are 2??-??-16s Think they are 235-60-16. Could be wrong. I'll check if you want me to. Just email me.
They are gold. 16" Never measured width. Tires on them are 2??-??-16s Think they are 235-60-16. Could be wrong. I'll check if you want me to. Just email me.
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