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cams, valve timing and ignition timing  Rating:  Rating
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 Posted: 10-12-2016 07:55 am
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Esprit2
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Tim Murphy wrote:
Hopefully, I will then keep quiet and let the other, more knowledgeable guys offer help :<)Discussion is good, don't go silent on us.

Regards,
Tim Engel

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 Posted: 10-12-2016 08:00 am
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Esprit2
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qwerty wrote:
Just checked the back of the cam gears and there's a black mark....

....JUUUUUUST KIDDDING!!
Keep that up and we'll make you go sit in the corner.
;-)

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 Posted: 10-12-2016 10:15 am
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qwerty
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You may as well, it's like 90 degrees over here....

...sorry I couldn't resist. :)

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 Posted: 04-11-2017 02:01 am
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allstateguy
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Just starting cam belt/tensioner replacement on B74 2 5757

When camwheel marks face each other, intake notch is 110 and exhaust notch is 115

I've heard the engine run, and it sounded fine, but haven't driven the car (15615) yet

Should I time it back to 110/110 when I put the belt on?

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 Posted: 04-11-2017 05:17 am
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Esprit2
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Does your car have to pass a strict emissions test. If so, it will have a better chance with 115 In / 115 Ex cam timing.

If the local emissions standard is a little more lax, or if your car, being rather old, doesn't have to be tested, then the engine will run better if the standard cams are timed to 110 IN / 110 Ex. It also helps to dial-in a little more static ignition advance at around 12* BTDC, and a richer mixture will also help performance.

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 Posted: 04-11-2017 12:59 pm
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allstateguy
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Thanks! No emission test for this car, classic plates and insurance obviates that in AZ.

Will time back to 110/110. I was just checking in here to be sure that the 110/115 timing wasn't some "hot tip" that was somehow "better" than the stock setting.

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 Posted: 04-11-2017 06:25 pm
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If you want to play with cam timing, give 104 In / 110 Ex a try. But for that, you'll need to buy a 104 pulley. If you just want to use the best option available on your stock pulleys, then it's 110 In / 110 Ex.

Regards,
Tim Engel

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