W-30 Timing Advance

7.5 Litre Nightmare · May 25th, 2009, 01:30 PM

Hey guys, brand new to the forums here. Hope ya'll are having a great memorial day. I have a question about a 455 motor. It's a W-30 out of a 4-4-2 and I was wondering if anyone knew what the advance should be ? It's got a Melling W-30 cam and an Accel HEI distributor. Any help on this would be appreciated.

J-(Chicago) · May 25th, 2009, 02:41 PM

With the vacuum advance lines plugged, I think 25 @ 3000 rpm should run well.
Then hook up your advance and see how she runs.
Back it off if need be.

J-(Chicago) · May 25th, 2009, 02:42 PM

That's what i run mine at, but i'm using a points advance. I'm not sure if hei adds more .

Run to Rund · May 25th, 2009, 11:15 PM

I suggest 12 deg. initial without vacuum advance hooked up. For an automatic, bring in the total of 36 deg. around 3000 rpm. For a stick around 4000 to duplicate stock curves. You can mix and match Mr. Gasket etc. springs to get the advance you want. After you are done, hook up the vacuum advance.

7.5 Litre Nightmare · May 26th, 2009, 06:32 AM

Thanks J and Rund. I will give that a try and see how it runs.

1964f-85 · May 27th, 2009, 10:02 AM

get an aftermarket adjustable vacuum unit, start at full advance them back it down to eliminate the pinging at part throttle. i would run as much as the car can handle.
My mild built 455 likes very little advance, but every Olds I have owned is different.

pitfield1 · May 28th, 2009, 06:56 PM

I got this from my super tuning "W" booklet, and I quote.."Basic stock setting of 14* BTC at 1250 provides 27* BTC timing above 4000 rpm" Hope this helps,and welcome.

PIT
69 442 conv

88 coupe · June 1st, 2009, 08:37 PM

Quote:

Originally Posted by 7.5 Litre Nightmare

........ wondering if anyone knew what the advance should be ? ........

Post #4 works for me.

Quote:

Originally Posted by J-(Chicago)

........ i'm using a points advance. I'm not sure if hei adds more.

The method (mechanical or electronic) of triggering the coil has nothing to do with the timing of the spark.

Norm

70Wcars · June 3rd, 2009, 08:01 AM

Good answers here.
Welcome Back Norm..missed your knowledge...finally got my race car in the 10's...

Danny

88 coupe · June 3rd, 2009, 09:34 AM

Quote:

Originally Posted by 70Wcars

........ Welcome Back ........ finally got my race car in the 10's.

Thanks and congratulations.

Get me a pic to post when someone badmouths the Q-Jet.

Norm

May 25th, 2009, 01:30 PM	#1 (permalink)
7.5 Litre Nightmare Registered User Join Date: May 2009 Posts: 4	W-30 Timing Advance Hey guys, brand new to the forums here. Hope ya'll are having a great memorial day. I have a question about a 455 motor. It's a W-30 out of a 4-4-2 and I was wondering if anyone knew what the advance should be ? It's got a Melling W-30 cam and an Accel HEI distributor. Any help on this would be appreciated.

May 25th, 2009, 02:41 PM	#2 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 2,696	With the vacuum advance lines plugged, I think 25 @ 3000 rpm should run well. Then hook up your advance and see how she runs. Back it off if need be. __________________ I'd rather have a numbers matching poker hand.

May 25th, 2009, 02:42 PM	#3 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 2,696	That's what i run mine at, but i'm using a points advance. I'm not sure if hei adds more . __________________ I'd rather have a numbers matching poker hand.

May 27th, 2009, 10:02 AM	#6 (permalink)
1964f-85 Registered User Join Date: Mar 2008 Posts: 74	get an aftermarket adjustable vacuum unit, start at full advance them back it down to eliminate the pinging at part throttle. i would run as much as the car can handle. My mild built 455 likes very little advance, but every Olds I have owned is different. __________________ My 64 F-85 455, 4sp, 3:25's

June 3rd, 2009, 08:01 AM	#9 (permalink)
70Wcars Registered User Join Date: Jan 2007 Location: Texas Posts: 64	Good answers here. Welcome Back Norm..missed your knowledge...finally got my race car in the 10's... Danny __________________ Dan S 70 442 W-30 4-speed 70 442 W-30 Post Coupe Bracket Race car...10.66 @ 3650lbs.

May 25th, 2009, 11:15 PM	#4 (permalink)
Run to Rund Registered User Join Date: Mar 2008 Posts: 337	I suggest 12 deg. initial without vacuum advance hooked up. For an automatic, bring in the total of 36 deg. around 3000 rpm. For a stick around 4000 to duplicate stock curves. You can mix and match Mr. Gasket etc. springs to get the advance you want. After you are done, hook up the vacuum advance.

May 26th, 2009, 06:32 AM	#5 (permalink)
7.5 Litre Nightmare Registered User Join Date: May 2009 Posts: 4	Thanks J and Rund. I will give that a try and see how it runs.

May 28th, 2009, 06:56 PM	#7 (permalink)
pitfield1 Registered User Join Date: Nov 2006 Posts: 15	I got this from my super tuning "W" booklet, and I quote.."Basic stock setting of 14* BTC at 1250 provides 27* BTC timing above 4000 rpm" Hope this helps,and welcome. PIT 69 442 conv

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