Patrick,
I will have to check with a friend of mine to see if he has any actual
figures. He works on carbs and TBs. Steve Zepeda of CFM Carburetor
Shop in Houston, Texas has teflon coated my TB for my 1995 Impala SS. He
does work on several professional race cars, and used to do it on some
Super Stock drag racers until NHRA found out and outlawed it.
He said it significantly helped flow, so much that he would do either the
coating OR the porting on my lightly-modified SS, but not both. He said
the TB was still not the bottleneck in the SS performance, and that my
performance would suffer until I added some head work or cam, which I
haven't done.
There was some performance gain. I showed 6 HP and 10 Lb-Ft increase
between dyno runs. These runs were spaced almost a year apart, so they
are not wholly scientific, but weather conditions were similar, and the
only other change was from a modified, K&N-equipped factory airbox to a
ram air system, which didn't get me much sitting on a dyno! Hope this
helps.
Gene Beaird
98 Flame Red CC R/T
95 DGGM Impala SS
>
>There is really no mystery work here, but I'm still interesting in this magic
>teflon coating and how well it really outflows polished aluminum. I've
>worked
>with a few things (vacuum molds) anodized with a teflon impregnation before,
>it definatly has a different feel than aluminum, but how well does it
>work.....
>
>ttyl
>Patrick
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