iTurbo
06-10-2006, 04:26 PM
OK, let's analyze charge temps now!
On my Shelby Lancer, the charge temps react somewhat different than I would expect. First of all, it's hotter in the intake manifold than I would have guessed. Charge temps are consistently ~30'F higher than the ambient temp. I'm using the battery temp sensor as an indicator of ambient temp BTW.
The higher temps seem to be more related to the heat soak of the engine and NOT due to the boost level. For example, if my car is warmed up and I shut it off and let it sit for 5-10 minutes, the charge temps are really high when I start the car back up. They will slowly go back down, but driving around in town they are consistently in the 100-120'F range with ambient temps in the 80s.
Interestingly, if I go to WOT (18 psi), the charge temps will actually drop! Even at the end of the run, they are on the way down. I would have thought the stock TII intercooler would heat soak and cause the temps to rise but this is not the case. Apparently the stock TII intercooler cools fairly well (at speed), even if the flow isn't all that great.
What can I do to reduce the heat soak of the intake manifold? It is much worse than I thought. I'm surprised no one out there has made a phenolic spacer to fit between the plenum and runners for the 2pc intake manifold. I would think that that would greately.
On my Shelby Lancer, the charge temps react somewhat different than I would expect. First of all, it's hotter in the intake manifold than I would have guessed. Charge temps are consistently ~30'F higher than the ambient temp. I'm using the battery temp sensor as an indicator of ambient temp BTW.
The higher temps seem to be more related to the heat soak of the engine and NOT due to the boost level. For example, if my car is warmed up and I shut it off and let it sit for 5-10 minutes, the charge temps are really high when I start the car back up. They will slowly go back down, but driving around in town they are consistently in the 100-120'F range with ambient temps in the 80s.
Interestingly, if I go to WOT (18 psi), the charge temps will actually drop! Even at the end of the run, they are on the way down. I would have thought the stock TII intercooler would heat soak and cause the temps to rise but this is not the case. Apparently the stock TII intercooler cools fairly well (at speed), even if the flow isn't all that great.
What can I do to reduce the heat soak of the intake manifold? It is much worse than I thought. I'm surprised no one out there has made a phenolic spacer to fit between the plenum and runners for the 2pc intake manifold. I would think that that would greately.