Timing on 454 BB - Team Camaro Tech
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post #1 of 3 (permalink) Old Jul 7th, 15, 10:32 AM Thread Starter
Kam
 
Join Date: Feb 2015
Location: ontario canada
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Timing on 454 BB

Hello fellas, so my 68 camaro 454 BB is not running the way it should. Brutal backfire the other day while punching it. It also hesitates when stepping on the gas. I'm very new to all of this so I'm unsure on my corrective actions. But from what I've been reading it possibly has something to do with the timing. Here are the car specs.

-750 Holley double pump, dual feed fully jetted carburetor

- Bored 30 over, I believe has 10:1 compression

- Ported heads

- Miloden Performance oil pan

- Comp camshaft, mechanical roller part #117718

- MSD spark plu wires

- NGK spark plugs

- MSD distributer with pro billet aluminum housing

- 6AL MSD ignition box****

- MSD Blaster 2 coil

- Edelbrock performance intake manifold

- Edelbrock High performance water pump

- Upgrader performance valve springs

- Crane cams stud mounted aluminum rocker arms


That's basically it. Any idea of what my timing should be set at?

Any help is appreciated guys, thank you
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post #2 of 3 (permalink) Old Jul 7th, 15, 03:42 PM
DT
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Donny
 
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Location: Rockland Cty/Melb bch Fla
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Re: Timing on 454 BB

My BBC is set at 12* initial 34 total. 34* or 36* seems to be the norm for BBC's. VA now connected.

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post #3 of 3 (permalink) Old Jul 7th, 15, 06:26 PM
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Morgan
 
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Re: Timing on 454 BB

The first thing you need to know is how much mechanical advance the distributor has in it. Set it at 38 degrees at 3,000 or even 4,000 if you gave stock springs, then check it at idle, the difference is the mechanical advance, 14-20 initial is where you want to be, vacuum advance un hooked , now plug it in and read the new idle, the diff is the amount of vacuum advance, that's all there is to timing.

Timing then carburation

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