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11-29-2020, 07:48 PM | #81 |
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Re: Not for Nuthin' But Close!
The advertised compression ratio is 10.00:1.
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Marty Knox 3071 STK |
11-29-2020, 10:03 PM | #82 |
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Re: Not for Nuthin' But Close!
The combustion chamber design has some hemispherical properties, so more timing didn't seem to do any good. The fuel is 100 octane unleaded Sunoco 260GTX. The only fuel settings I can mess with are power enrichment (only active in closed loop), and injector pulsewidth multiplier vs manifold vacuum. For this reason I decided to run the car in open loop at all times and take control over the amount of fuel going in. With it in closed loop the ecu kept commanding the afr to be richer and richer and I couldn't get it under control. Attached are photos of both the injector pulswidth multiplier and the minimum spark table.
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11-30-2020, 07:57 AM | #83 |
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Re: Not for Nuthin' But Close!
Ok cool.......what can you adjust in open loop? Can you monitor a/f ratio?
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1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop. |
11-30-2020, 08:36 AM | #84 |
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Re: Not for Nuthin' But Close!
Yes and No. There is an afr shown in the data log, but it shows that it is the commanded ratio by the ecu. However, when I started to mess with fuel, it did start to show leaner values. The 02 voltage is also shown, and is somewhere around .8 - .9 going down the track.
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11-30-2020, 09:35 AM | #85 |
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Re: Not for Nuthin' But Close!
Just FYI that Mike Cashman has posted pics of the car in the FB Stock and Super Stock Racing group, assume the pic has Doug and Billy in it. Very cool little ride.
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Jim Carter 2340 Super Stock 2340 SST/2340 Stock |
11-30-2020, 10:41 AM | #86 |
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Re: Not for Nuthin' But Close!
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11-30-2020, 10:47 AM | #87 | |
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Re: Not for Nuthin' But Close!
Quote:
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1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop. |
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11-30-2020, 10:56 AM | #88 |
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Re: Not for Nuthin' But Close!
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11-30-2020, 11:00 AM | #89 |
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Re: Not for Nuthin' But Close!
Thanks Doug, I’m learning!
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Jim Carter 2340 Super Stock 2340 SST/2340 Stock |
11-30-2020, 12:01 PM | #90 |
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Re: Not for Nuthin' But Close!
Threads like this are always my favorite.
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Billy Kirpens Jr / Pro ET / Street ET 123J @ Lebanon Valley Dragway Stock/Super Stock 123A |
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