Re: twin turbos?

["Pandya, Raggi CA-MNTPO1" <RPANDYA@MNTPO1.CA.unisys.com>]

>I know of a N/A '85 5k that ran nitrous for a while.  Sure, it was   
running all
>the time instead of tapering off, but the end result was a cracked   
piston, & a
>new block (thank you Audi.)  Now, the Audi mechanics did find an air   
bubble in
>the metal in the piston, but I have to believe that piston would have
>lead
>a long, happy life under normal operating conditions...  Food for   
thought-

Gotta laugh at this...any fool who puts nitrous on permanently without   
doing some MAJOR engine modifications (lower compression/metal head   
gasket etc..etc..) is just ASKING for trouble.

I find in general nitrous gets a bad rap, usually from the yahoos who put   
150hp kits on their otherwise stock blocks/heads, then complain when   
their internals blow to crap.  A well prepared/installed nitrous system,   
with a progressive/time based jetting is a very powerful and reliable   
performance upgrade.  The installation should be akin to adding a   
turbocharger to an engine... you have to restrain yourself from jetting   
too high. (Adding too much boost), and the internal in the engine must be   
up to snuff.

I have seen several vehicles which have run on nitrous for years(100+   
drag strip runs, little to no internal engine mods), and have never had   
their heads off.  Installed correctly and jetted realistically, nitrous   
should be at least as reliable as a turbo installation, maybe more so   
considering the lack of complexity involved in the actual hardware.

Nitrous combined with a turbo installation is an extremely attractive   
option.  The nitrous would be set to come on low, before the turbo boost   
builds (allowing for a larger compressor wheel and more boost).  This   
would also allow the turbo too build boost very quickly, and since   
nitrous is injected at a extremely cold temperature (~125' F I think)   
 this would provide a secondary level of intercooling.  Obviously the   
nitrous would taper off when the boost comes up.  This installation is by   
no means simple, but would yield some tremendous results.  NOS (the   
nitrous supply forerunner) provides a kit specifically tailored to   
turbocharged installations.

In all, nitrous is a viable and cost effective performance addition, just   
don't go for the crazy 250hp shots!!

Regards,

Raagi Pandya
Montreal, Canada