Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Chasing weird temps on small block?
Steiner is correct, the back ports on the Airgap are tapped but has no flow unless you got it going somewhere.
I plumbed these two holes to an adapter block just under my T-stat to eliminate that hot spot. No flow there also causes corrosion on some intakes.
If that fan switch is set for 240°, might do what Kevin is saying, go to the head which would be the hottest spot.
Just wondering where that MSD EFI unit has the air temp sensor.
I have seen some guys add a adjustable capillary style temp sensor switch into the radiator hose inlet. Have more control with the off/on , you could stagger the second fan to come on later , main fan runs constant.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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