Valve Train noise

[Scot Sealander]

John Hess wrote:

> The original TPI was designed for the 305 engine
> and is woefully inadequate for even a mildly built 350.

Do you have a source for this?  How do you know it was designed for the 305, 
and not the 350?  


> To state that these parts are fraudulent or that the people
> who sell them are liars is irresponsible and/or stupid..

Maybe not.  Just what does that "air foil" do anyway... ;-)  As far as 
aftermarket PROMs, the three I have looked at did not do much.  Delay TCC lock 
up by several mph, maybe reduce the ESC attack rate (makes sure of the need 
for 93 octane!)  Change fan turn on temp.... One completely zero'd every EGR 
location..... Basically no ignition or fuel changes.  Not a lot for the 150 
bucks or so they charge!  That is close to fraudulent in my book, and points 
out that GM tunes them pretty well from the factory.
 
I am sure that some of the aftermarket is great stuff, but the consumer must 
understand what he is buying.  The TPI is a great low/mid RPM intake system, 
and that may not be clear to all consumers.  So if you make changes to your 
350 that increase airflow requirements at higher RPMs, the TPI will not work 
well for you.

Scot Sealander    Sealand at clarityconnect.com