Tuning with Thermal Temp Gun question
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Staging Lane
Joined: Aug 2010
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Tuning with Thermal Temp Gun question Out of curiosity I borrowed my dad's temperature gun to measure the temperature(s) at each header primary and near each cylinder head. 6 of the 8 cylinders were pretty consistent (right around 280 degrees while idling) however the back cylinder on each side read 40 degrees cooler, consistently.
Logic tells me since it's N.A. it seems reasonable the back two cylinders would get less O2, be less efficient and therefore be a little colder. However I am NOT a tuner nor have much experience in this area. Can anyone else confirm they have seen similar results without issue?
I plan on replacing the plugs (now that the tune is starting to get close) so I can interpret the plugs too.
I am currently running a NA L92 headed 6.0 LS (no DOD or VVT), custom turbo cam, valve springs, retainers, etc. Truck intake, Siemens 80lb injectors, MS3 Gold box, Uego wide band, and hooker manifolds down and forward. I have the exhaust dumping out of the merge to atmosphere (plan on installing the turbo once I trouble shoot everything else first to avoid adding variables to the equation).
At idle and up to around 3k (only as far as I have gotten in tuning) my AF stays around 14.7 under vacuum without issue. Timing is very conservative.
Logic tells me since it's N.A. it seems reasonable the back two cylinders would get less O2, be less efficient and therefore be a little colder. However I am NOT a tuner nor have much experience in this area. Can anyone else confirm they have seen similar results without issue?
I plan on replacing the plugs (now that the tune is starting to get close) so I can interpret the plugs too.
I am currently running a NA L92 headed 6.0 LS (no DOD or VVT), custom turbo cam, valve springs, retainers, etc. Truck intake, Siemens 80lb injectors, MS3 Gold box, Uego wide band, and hooker manifolds down and forward. I have the exhaust dumping out of the merge to atmosphere (plan on installing the turbo once I trouble shoot everything else first to avoid adding variables to the equation).
At idle and up to around 3k (only as far as I have gotten in tuning) my AF stays around 14.7 under vacuum without issue. Timing is very conservative.
Last edited by liquidmx; Apr 19, 2016 at 06:08 PM.
"right around 280 degrees while idling) however the back cylinder on each side read 40 degrees cooler, consistently. "
The temps toward the ft are being influenced by the rear cyls.
The temps toward the ft are being influenced by the rear cyls.
