I've got my BBC running and I've driven it a little but I'm really pretty lost on the timing.
I've got the 60-2 tooth lined up with the 9th tooth after the gap lined up to the VR sensor. In my MS wheel settings I have
Teeth: 60
Missing: 2
Skip: 15
Delay: 9
Trigger Offset: 4.00
Unless I don't understand things, I should be seeing 18deg of advance on my balancer with the timing light (what is shown in Trigger Wizard) with 0.00deg of trigger offset. This is NOT the case. It is off by a significant amount (I messed around too much today to remember). The 4deg I have now just makes it seem to run a little smoother.
The spark table I have created is basically a "flat" curve just to get me started, but the power seems to completely drop off over 2500 rpm (not enough advance?). I know I'm off somewhere. Am I in the ballpark? Attached are my msq, spark table, and logs.
PS. Is distributor positioning a relevant issue with this configuration? My understanding was that it was only for switching, not timing, so the exact position shouldn't affect timing.
PPS. Any 'squirters in the Twin Cities want to make a couple bucks and drink some beers while giving me some guidance?
In the Ballpark with BBC?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
In the Ballpark with BBC?
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Re: In the Ballpark with BBC?
For completeness I ran out and did one more test.
At trigger offsets:
4.00 = reading 1 deg BTDC according to my mark
0 = reading 5 deg BTDC
-4 = stumbled, died, wouldn't run
What am I doing wrong or looking at wrong?
At trigger offsets:
4.00 = reading 1 deg BTDC according to my mark
0 = reading 5 deg BTDC
-4 = stumbled, died, wouldn't run
What am I doing wrong or looking at wrong?
Re: In the Ballpark with BBC?
Does my spark table look like enough advance, soon enough for a cast iron big block chevy? Compression should be around 10.5:1
Re: In the Ballpark with BBC?
Still struggling.
Is it impossible to get advance if the sensor is positioned at the same # of delay teeth that corresponds to 0* BTDC.
ie: If the sensor is at 9 teeth, and 9 teeth is 0* BTDC, and delay teeth is set to 9, is that an incorrect setup?
Is it impossible to get advance if the sensor is positioned at the same # of delay teeth that corresponds to 0* BTDC.
ie: If the sensor is at 9 teeth, and 9 teeth is 0* BTDC, and delay teeth is set to 9, is that an incorrect setup?