Is it really true that cars left the factory de-tuned deliberately by altered timing?
Well there are plenty of stories of timings be well out, but if you wanted to reduce the power of a production engine why in the name of god would you do it like that?
C
Because its easily done on assembly.. don't forget at the time this was all very low volume stuff assembled be hand
And don't forget guys, the valve timing was probably out from the factory spec when it was first built..
You need the dial gauges to do the job properly, you can't rely on paint marks when replacing the belt!
Dave
This was the case on my 3200 GTA also. valve timing was quite a bit off on both cylinder banks, on the left not so much than on the right bank. I adjusted timing to factory specs and at least idle is a bit smoother, now i only have to wait until there is no snow left to see if there is some power gain!
Timing was (@TDC)
Left bank: Exhaust open 0,45mm, intake 0,53mm
right bank: Exh. open 0,35mm, int. 0,49mm
No arrows, i did a search and it came out, rotation doesnt matter.Any arrows marked on the belt? If rotation direction matters it is clearly marked by arrows. If there isn't, i think it should not be an issue.
OkNext is remove the fan belt using a normal 3/8 short extension in the tensioner arm. Couldn't get a picture of this as it was too low to get a decent picture!