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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old 03-28-2011, 05:26 AM   #1
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timing. rotor button position

ok i have read on here two different things one is the rotor button should be lined up with brake hose at back of plenum the other is it should be lined up ewith the no.1 piston. i have it at tdc. or does it matter which one i chose?
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Old 03-28-2011, 06:10 AM   #2
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Re: timing. rotor button position

So long as the motor is at TDC on the COMPRESSION stroke, the rotor can face where ever it wants. That doesnt matter. People get all caught up pointing the rotor in a certain direction. The distributor doesnt know where the rotor is facing and doesnt care. Just be sure to somehow mark where the rotor is facing and then when you drop the cap back on, #1 plug goes to where the rotor was facing.
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Old 03-28-2011, 06:31 AM   #3
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Re: timing. rotor button position

I does matter if you are using stock - length ignition wires.
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Old 03-28-2011, 06:35 AM   #4
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Re: timing. rotor button position

then i have a problem cuz guy before me put summit wires on, it that are way too long. i bought car in parts cuz he couldnt get it back together.
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Old 03-28-2011, 06:59 AM   #5
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Re: timing. rotor button position

I am having the exact same issue, I bought a car and the whole ignition needs to be installed. My question is what are my options if I have a 350(5.7) with a carb on it.....the whole ignition thing kinda confuses me because there are so many options



I was thinking of getting the msd stuff, pn 85551 distributor, the blaster 2 coil and the the 6al or 6al2 kit
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Old 03-28-2011, 07:28 AM   #6
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Re: timing. rotor button position

Wires too long is good news 'cause you can trim them to length.

There are hundreds of threads detailing how to set up ignition wires from scratch with an unknown engine position. Read 3 or 4 of them and you will get your answer.

But post# 2 above is all you need to know if you're in a panic.
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Old 03-28-2011, 12:02 PM   #7
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Re: timing. rotor button position

Ticeblue ... all you need is any vacuum advanced distributor, and plug wires, rotor, cap, coil. All you have listed is "fluff". If you want to sprnd mobey on "fluff", then fine - but it's not needed. The ignition boxes, all they do is make a multiple spark rather than a single spark - helps race cars some, but not needed for street. Can help some folks, but it's "fluff".

bbsr72 - All you have to do is remove #1 spark plug, put finger over hole, and have someone turn engine over until you feel outward air pressure on your finger - then look at balancer, the timing mark will be close to the timing tab - turn motor what ever direction needed until the mark is on zero. You are now at TDC #1 on COMPRESSION stroke. Now look at rotor - wherever it points, that MUST be the #1 spark plug wire on the cap, then you follow the firing order clockwise around the cap with the other wires.
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Old 03-29-2011, 08:38 AM   #8
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Re: timing. rotor button position

thanks guys
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Old 03-29-2011, 08:38 AM
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