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O2 sensor for AFR

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Perdido Avatar
Perdido Silver Member Rut Rutledge
Tuscaloosa, AL, USA   USA
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In reply to # 3955929 by Speedracer I have Westech dual needle EGT gauge with a probes on #1 and #3 header tubes, then the O2 just beyond the header collector, the dual EGT gauge lets me monitor the twin HS6s independently, and the O2 gives me a overall number, I shoot for 1300 degrees at WOT on EGT, and that normally nets about 12.5 on O2.

Interesting solution and never thought about egt as a diagnostic tool. The Abarth exhaust gives me plenty of room for installation of the O2 sensor, but the cast iron manifold might present a difficult egt installation. What do y’all think about an O2 sensor on each down pipe?
Thanks, Rut



1960 Bugeye,1275, 5 speed
1970 MGB, Pale Primrose
1967 Triumph TR4a
1966 Triumph TR4a
When I went to school, they asked me what I wanted to be when I grew up. I wrote down 'happy'. They told me I didn't understand the assignment, and I told them they didn't understand life. John Lennon

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Speedracer Platinum AdvertiserAdvertiser Hap Waldrop
Taylors, SC, USA   USA
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1961 MG MGB "LL" Lady Lynn"
1967 MG MGB Racecar "The Biscuit"
In reply to # 3956279 by Perdido
In reply to # 3955929 by Speedracer I have Westech dual needle EGT gauge with a probes on #1 and #3 header tubes, then the O2 just beyond the header collector, the dual EGT gauge lets me monitor the twin HS6s independently, and the O2 gives me a overall number, I shoot for 1300 degrees at WOT on EGT, and that normally nets about 12.5 on O2.

Interesting solution and never thought about egt as a diagnostic tool. The Abarth exhaust gives me plenty of room for installation of the O2 sensor, but the cast iron manifold might present a difficult egt installation. What do y’all think about an O2 sensor on each down pipe?
Thanks, Rut

Rut, on the race car, we hardly ever look at plugs anymore at the track, don't need to with twin EGTs.



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