Timing retard on nitrous? - Chevy Impala SS Forum
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post #1 of 12 (permalink) Old 04-14-2012, 09:44 AM Thread Starter
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Timing retard on nitrous?

Hi from SWEDEN.
I wonder what kind of retarder I use best to retard ignition when I use nitrous! I only want to retard ignition in one step.(5-9deegrees.)
I have MSD-opti and MSD 6AL BOX ON MY CAR.
Sincerly Frank.
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post #2 of 12 (permalink) Old 11-04-2012, 10:59 PM
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MSD makes a few options like a digital 6 ignition box which will let you do a single stage retard. or they also make a multi stage retard box.if I remember correct you need to retard the timming 4 degrees for every 50 HP of nitrous
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post #3 of 12 (permalink) Old 11-05-2012, 05:58 AM
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Quote:
Originally Posted by djvez View Post
MSD makes a few options like a digital 6 ignition box which will let you do a single stage retard. or they also make a multi stage retard box.if I remember correct you need to retard the timming 4 degrees for every 50 HP of nitrous
Yes, the Digital 6 will give you the retard. However, if you're running anything over a 50-shot with a streetable torque converter, you should run a window switch, so I used the Mallory 685 box, which has a built-in window swtich.
And that's 4 degrees per 100 hp of nitrous.

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Last edited by The Bolt-On Terror; 11-05-2012 at 06:04 AM.
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post #4 of 12 (permalink) Old 11-05-2012, 11:16 AM
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that mallory is a pretty nice unit.I was gonna upgrade from my 6AL to a digital 6.I have a vigilante 2800 stall in my 95 SS ,so would it be better to upgrade to the mallory?and also I have the MSD blaster coil how would that wire into the mallory or would I have to upgrade to a mallory coil and which one if you know off hand?
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post #5 of 12 (permalink) Old 11-05-2012, 01:19 PM
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Quote:
Originally Posted by djvez View Post
that mallory is a pretty nice unit.I was gonna upgrade from my 6AL to a digital 6.I have a vigilante 2800 stall in my 95 SS ,so would it be better to upgrade to the mallory?and also I have the MSD blaster coil how would that wire into the mallory or would I have to upgrade to a mallory coil and which one if you know off hand?
Since you're already running an MSD box, I assume you have their harness that adapts to the coil plug. If so, the Mallory box will be a direct plug-in replacement for the MSD box. I used the MSD adapter harness with the Mallory box.

Stock bottom 350, Built by B-Body Performance
NA: 10.98 @ 122
100 shot: 10.35 @ 128
2012 ISSCA SSuperPro Champion
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2013 ISSCA Roadrace Runner-up
2014 ISSCA SSuperNatural Runner-up
2014 ISSCA Autocross Runner-up
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post #6 of 12 (permalink) Old 11-05-2012, 05:00 PM
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very cool,yea i got the plug.thanks for the info and I hope this answered all of zappas questions lol.
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post #7 of 12 (permalink) Old 11-06-2012, 11:33 AM
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I use to have the Mallory 685 and loved it! It's not very expensive and does everything.

No need to buy "pill", everything is adjustable. Soft rev-limiter, 2-step, timing retard, window switch, etc.

Guillaume Charest

1995 DGGM Caprice, 355ci twin turbo, TH400, F.A.S.T. EFI, 4200 lbs street car 9.96 @ 141.2 mph **SOLD**
1989 Mazda RX7 Turbo II, 357ci LT1, AI 215cc heads, single plane, GTX4708R turbo, TH400, 8.8" SAS, Holley Dominator EFI
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post #8 of 12 (permalink) Old 04-21-2013, 07:23 PM
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mallory box

anybody ot a part # for that ingnition box?? I see a few my 6a went out and plan on adding nos to my car.
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post #9 of 12 (permalink) Old 04-22-2013, 05:56 AM
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Quote:
Originally Posted by rickeybobby9c1 View Post
anybody ot a part # for that ingnition box?? I see a few my 6a went out and plan on adding nos to my car.
The part number is 685, like he said.
Here's the Summit link: http://www.summitracing.com/search?k...ry%20685&dds=1

Stock bottom 350, Built by B-Body Performance
NA: 10.98 @ 122
100 shot: 10.35 @ 128
2012 ISSCA SSuperPro Champion
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2013 ISSCA Roadrace Runner-up
2014 ISSCA SSuperNatural Runner-up
2014 ISSCA Autocross Runner-up
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post #10 of 12 (permalink) Old 12-14-2015, 02:22 PM
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is the mallory box not available anymore?im looking for it on summits site and nothing.
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