timing troubles
Thread Starter
Teching In
Joined: Sep 2005
Posts: 33
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From: apollo beach florida
timing troubles hey guys im almost done with project banshee, i need some help on how to correctly time the optispark on my formula, im open to any and all suggestions about timing and such...i also am looking to install a full on msd ignition system but im cerious as to what equipment i need .
Make sure youre timing chain is intalled dot to dot and the timing on the distibuter(opti) is just about fool proof. It can really only go on one way correctly. What year is your car? 92-94 LT1's have a splined driveshaft that goes from the middle of the cam gear to the back of the opti. 95-97's are driven by the cam dowel pin that goes through the cam sproket and into the back of the opti.
Thread Starter
Teching In
Joined: Sep 2005
Posts: 33
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From: apollo beach florida
formula its a 1994 firebird formula banshee edition. it was timedwhen the engine was put to gether,. can the harmonic balancer hub being put on at tdc have any thing to do with it only backfireing and not turning over.
If it was timed when you put the engine back together, then why is it now out of time? Did you move the rotating assembly with the opti off? It is definitely out of time if so. With a 94, put your spline/key at the 9:00 position. Make sure you are on the compression stroke (#1 cyl at TDC). Have a friend move the crank around while you hold your thumb over the plug hole on #1. When you feel compression, make sure your key is at 9:00 and then you're timed, bolt up and go!
Thread Starter
Teching In
Joined: Sep 2005
Posts: 33
Likes: 0
From: apollo beach florida
ok i was at school and i took the opti off and set the opti on tdc but im not exactly sure of what is there to match up, the car only backfires and dosent crank. if u have any more ideas please let me Know...thans
Originally Posted by bansheeracer33572
ok i was at school and i took the opti off and set the opti on tdc but im not exactly sure of what is there to match up, the car only backfires and dosent crank. if u have any more ideas please let me Know...thans
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Originally Posted by dhdenney
You don't have it timed right. Trust me I know. Take the shaft out of the opti and roll it around between your thumb and index finger. Look closely and you will see a wide spot unlike the rest of the spline pattern. This is your key/slot/whatever. Crawl under the car and look right up to the hole as if you were looking through a key hole. You will see the slot where this slides in. Now follow the procedure I described, #1 at TDC, the slot at 9:00. Then you bolt up and you're ready to rock.
EDIT---but, if he does what you said and #1 is at TDC and the slot isnt at 9 o'clock, then he'd know its the chain installed correctly so youre right. I like to do things the hard way. The more work the better.
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