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 Couple of logs with RPM 
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Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
Does this look to be running out of fuel after the shifts?
The 1st one is just moderate accel. on the primaries.
2nd is wot from a roll starting in first with a lot of wheel spin. going into 3rd a ways.
3rd one is about the same just didn't spin as much.
Large pri. Qjet SMAB converted to DMAB 76 jet 50M rod move the sec. cap jets below the air valve drill the sec. feeds, did the air bleed tubes drilled & turned over. B hanger & CV rod 1/2 turn on the air valve spring.
Current fuel pump is an Edelbrock 110 gal/hr. runs around 7lbs. go to 5-5.5 wot , .140 inlet seat.
BTW 421 sbc around 530 hp.

session3.png [ 54.33 KiB | Viewed 288 times ]
session 1.png
session 1.png [ 55.67 KiB | Viewed 288 times ]
LOG with rpm.log [22.95 KiB]
Downloaded 12 times
Mon Nov 14, 2016 9:53 pm

Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
Thoughts on the lean spikes at the shift. Some times I can feel lay down a bit sometimes not.

session4.png [ 62.01 KiB | Viewed 264 times ]
Fri Nov 18, 2016 9:42 am
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Joined: Fri Feb 08, 2013 2:37 pm
Posts: 1744
It looks like in the first the RPM trace is crazy. You didn't actually turn 6500, did you? Then, in the second and third, it looks like you got the RPM input fixed up. Good job, the variable resistor did the trick?

You say, "a lot of wheel spin", so it must be part-throttle and you are pedaling it ..???

It may be because the forum software changes the order (progression) of the image attachment so it is different than your description, but the session numbers, 1,3,4, don't match the way I read your description.

If you attach the log file so LogWorks can be used to look at this it will be easier.

About the lean spikes, were you at WOT 100% of the time, no slight lift at the shift?

It would be nice if it was convenient for you to add a MAP sensor and perhaps a TPS to this. The SSI-4 has a 5V supply for the sensors. The TPS is a little tricky to make a good solid mechanical connection but the MAP sensor is easy, just a hose.

Fri Nov 18, 2016 1:39 pm

Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
Yea it could have went to 6500. No wasn't pedaling just let um smoke. It's on street tires.
Probably don't get a real idea what's going on with that much tire spin.
It's all over now we'll have white stuff on the ground now for 5 months.

Fri Nov 18, 2016 2:51 pm
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