DIY flowbench?

[Jörgen Karlsson]

>
> What was the typical original failure mode?  Detonation?  How are you
> avoiding detonation in your subsequent setups?  Simply thru tuning?....
>


The typical failure mode is detonatonation because of uncontrolled boost
pressure, 20-30psi is not a good idea with stock internals. Ring lands and
bent rods are the result. As long as the exhaust is not too free flowing it
is not a problem. This is solved with a bigger turbo, porting of the
wastegate on the stock turbo could probably do the trick too but since the
turbos start to get very old by now a new turbo is often needed anyway. Not
to mention how much power is added by the bigger turbo.

After the new rods and pistons are in the engine can take a lot of
detonation, people don't seem to remember what the maximum boost pressure
is. But there are a few guys here that still run stock turbos with good
internals and free flowing exhaust, they have to check the boost gauge all
the time to make sure that it stay at safe levels. Some people can handle
that, most can't.

Jörgen

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org