166 replies to this topic

[Steve Scheifler]

This represents 60% of 1.6 drivers today, sadly.

Closer to 80% I'm afraid, but the changes weren't really intended for them.

[Steve Scheifler]

I've been running dual intake temp gauges at each race, one in the intake manifold near the back, and the other can be moved around to the turn indicator opening, just in front of the TB, in or near the air filter, etc. We haven't had a hot day yet but I am seeing an increase of 14-18 degrees from the air filter to the intake manifold with the plastic section pretty well wrapped. One of these days I'll put an un-wrapped one on between session for comparison. I have not yet measured from TB to determine how much comes from the actual manifold.

I admit, the increase after the filter is more than I expected, but with much of it being immediately behind the radiator it does have hot air blowing on it constantly. It is probably worth more efforts to reduce that.

[MPR22]

I've been running dual intake temp gauges at each race, one in the intake manifold near the back, and the other can be moved around to the turn indicator opening, just in front of the TB, in or near the air filter, etc. We haven't had a hot day yet but I am seeing an increase of 14-18 degrees from the air filter to the intake manifold with the plastic section pretty well wrapped. One of these days I'll put an un-wrapped one on between session for comparison. I have not yet measured from TB to determine how much comes from the actual manifold.

I admit, the increase after the filter is more than I expected, but with much of it being immediately behind the radiator it does have hot air blowing on it constantly. It is probably worth more efforts to reduce that.

Thanks for the information.  Some of us just want to understand what is going on by asking questions of those that have experience.  I could spend time and money doing it myself but why would I when I have people who are much more invested in doing the leg work.  I think most of the heat transfer is coming from the manifold, aluminum, a very effective conductor where the plastic tube is not.  Have you logged the intake temp at the filter through a session?  I'm curious how much the temp at the filter rises as the engine bay heats up.  

[Steve Scheifler]

So far the temp is pretty stable after the first couple laps. But that's just from visual monitoring of a dual didgital gauge, I didn't take up two analog inputs on the logger or and another one.

[Jim Drago]

Closer to 80% I'm afraid, but the changes weren't really intended for them.

Actually, they were."If the 1.6 cars were competitive, they would come out from under the cobwebs in their garages and start showing up and racing"

[Steve Scheifler]

Different guys. I'm talking about the ones who are actively racing their cars at least once per year. The ones you are taking about may actually be aware of the changes but are still waiting for a turbo.

[Bruce Wilson]

60-80%?  Wow we're making progress