Low temp thermostat

[CSH-HQ]

It richens the mixture.
Sometimes disables EGR.
Could possibly even effect closed loop if cold enough.
Could effect TCC if cold enough

Down sides:
Poor cylindr head clamping.
Running excessive bearing clearance
Running excessive piston skirt clearance

IMHO it's a cheap + dirty way to "feel" faster.  In some back to back 
testing when optimized for AFR, I found no difference, and since I care 
about the engine I went to 190.
  
For every day use, I use a 190..
I still haven't seen a good reason for a 160/140 thermostat, period.
Other than it feels faster, or someone who did this without trying to 
optimize the AFR first.  

Like some guys swear about using them, but ignore the EGR temp of 170, and 
say 160 themostats are the only way to go. No one that I know set the egr
enalbe to 230 with a 190 thermostat and tried it.

Not talking about racing, or theory.  
Grumpy

>Guys
>Quote from Jeff Hartmans book on FI
>"Typically a first stage prom might work well with a low restriction air
>filter, a low temperature thermostat"
>Question:
>what advantage is the low temp thermostat ?
>TIA
>Geoff
>