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Did some logging toda - tested 0.022 spark gap and resonator delete

4034 Views 12 Replies 5 Participants Last post by  XtremeRevolution
So after talking to vince yesterday, I started thinking hard using all the knowledge I have about automotive. I wondered if all the timing was being pulled because of the higher altitude and my spark gap. I've known drag racers with cobras who have had to run really low gaps to not only prevent blow out, but also to keep temps down and make more power. Seems backwards, but I went ahead and re gapped my plugs to 0.022. Stock was 0.025 across the board and I gapped them to 0.028 last week.

My plugs were starting to turn white (too hot) so I'm really glad I reduced the gap. When at 0.025/0.028 I would get on the throttle and around 3k it felt like timing was being cut. Now I don't feel that. At 0.022 I no longer feel that and my logs show that it isn't pulling so much timing now. I think I'll stay with 0.022.Additionally, I wanted to determine if the resonator delete really helped lower IAT's.

There was a big debate on XR's thread and I never saw anyone show any proof (although I'm sure someone has done so). So I went ahead and did it anyway.

(Green = AAT, Red = IAT)

No delete (2nd run)
View attachment 8286
With delete (1st run)
View attachment 8287

Looks like a 5 degree drop. That's significant IMO.As you can see the AAT's were higher when I did the first run. This is because I had been driving around. I went home, put a box fan on the engine bay while I inserted the ducting. I did however, drive the same route and drove the same way shifting at 5k in 3rd gear. I went East and then West.

I don't really see a point in spending $250 on a CAI since it's just pulling from the same place and isnt sealed up. Going to cut a 3" hole in the bottom of the air box like one of the other user's did. These are my finsings. I'm pretty satisfied with my changes.

I hope this encourages you guys to do you own testing now that we can see our logs.
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So.. what are we looking at here? Your IAT's, are they spiking because you're shifting? Or...
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