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Old 06-18-2007, 07:10 PM   #1
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Default Guess what, I bought a stupid MSD box! Help me set my timing!

I got an MSD box for cheap, no sense in dumping the cash on a bipes when I'm going MS shortly anyways.

From what I've read, it pulls 6deg of timing at max. I'm on a mostly stock GReddy kit right now at ~5psi and 6deg base timing. Since this MSD box pulls 6 total, would it be safe to bump up base to 12 rather than 10?

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Old 06-18-2007, 08:54 PM   #2
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yep.

there's nothign wrong with it....it works, you just dont have adjustability.
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Old 06-18-2007, 08:56 PM   #3
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Quote:
Originally Posted by StankCheeze View Post
I'm on a mostly stock GReddy kit right now at ~5psi and 6deg base timing.
What's "mostly stock"?
Fill out your sig with your current setup.

Offhand, I'd say with no IC, you should probably stick with 12* pulling 6*. If you've got an IC and can keep the boost down to 5-6psi, then I think you could get away with 14* base.

I'm running a Bipes, 14*base, pulling 8* @12psi boost. It was 94*F here in VaBch today and I drove the **** out of it. No knock, nothing on the oil pressure needle. You should be fine at 12*.
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Old 06-18-2007, 09:10 PM   #4
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I could knock running the msd, 13 deg with an intercooler and 93 octane at 9 PSI or so. Figure my intercooled 9 psi to be appx the same IAT as non intercooled 5 PSI.

Every car is a bit different. Try it and see. 10-12 should be possible.
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Old 06-19-2007, 01:03 AM   #5
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Quote:
Originally Posted by samnavy View Post
What's "mostly stock"?
Fill out your sig with your current setup.

Offhand, I'd say with no IC, you should probably stick with 12* pulling 6*. If you've got an IC and can keep the boost down to 5-6psi, then I think you could get away with 14* base.

I'm running a Bipes, 14*base, pulling 8* @12psi boost. It was 94*F here in VaBch today and I drove the **** out of it. No knock, nothing on the oil pressure needle. You should be fine at 12*.
Done. I don't knock at 6 base, so I figure 12 to be the same as 6 without the box. I'm on 93 octane. I'm not really interested in pushing it until I get my MS set up with KnockSense. I'm a former GTP guy (non-intercooled roots) so I'm really paranoid about knock. I may dial it back to 11 just for safety. I just wanted to verify that the curve in which the MSD pulls timing is roughly equivalent to the flat pull that cranking back the CAS gives you.
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