Quote:
Originally Posted by Pete156
I can only imagine what these tunnel covers might do to transmission temperatures. The open tunnel is the only escape for all that hot air flowing under the motor (as designed). Closing the exit door to those gases seems as if is going to produce a small oven around the transmission, driveshaft, and rear diff. Has anybody from Speedfactory done any testing on this effect?
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I'm a bit confused how you think the transmission is cooling in an OEM application.
Granted, without temperature probes this is all speculation, but I doubt much heat transfer happens between the case and air passing by it. I would assume if Toyobaru wanted to transfer heat via underbody airflow, they would have included some fins in the cast case similar to Harley heads.
These panels actually cover further rearward of the transmission and the air can surely escape behind these. It isn't air tight.
My honest thoughts on why OEM does anything here is to keep the passenger compartment from letting in unwanted heat. Personally been using these for 3-4 months without issues in Arizona heat (it's hotter here already than most of the country gets in the summer).
Quote:
Originally Posted by rookie
I only have the rear diffuser for now as I'm still undecided on the front splitter, though it would take little arm twisting to push me over the edge  .
I'll need more fill ups with the diffuser to get an average mpg with the diffuser so I can compare the 2 averages and not just a single fill up. I averaged 26.3 mpg before the rear diffuser install. According to my fuel app, I got 25.7mpg on my last tank before the diffuser install. The one and only fill up after the diffuser install came out to 28.3 mpg (my best so far) which is where the app got the 2.6 mpg difference. Once I get more fill ups with the diffuser, I'll be able to better compare the 2 averages but the initial data is already confirming the claims made by Velox of reducing drag. |
This is really neat, thank you for the information!