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I use Provent 200, (Provent 400 is huge and too expensive, it is designed for large truck engines). IMHO even 200 series is perhaps bigger than needed but its hard to source others indeed P150 would...
Taking EGR out will result in higher boost pressure than normal especially in your case with free flowing 3" exhaust so YES, you'll need Dawes valve to control maximum boost and needle valve to...
That's standard stuff with unmodded (NADS) ZD30 and EGR functioning. ECU turns on EGR full bore when cruisn so it needs to drop boost in order to get exhaust gases in to intake manifold.
Welcome to...
350 deg is fine.
I look at it like a cooling system, they can run all day at around 100 deg but if they go over their safe temp things go bad. EGT's are similar, as long as they stay below 500-550...
Next time you are up this way drop in I'll check it for you if you like. I'm just off ringroad near Ballarat RD
Anything under 500 is good, but wont hurt to double check, did you blank off the...
Check Chaz Yellowfoot{guru} threads on this subject,
general rule of thumb is 2000rpm = 10 psi
Fitting a needle valve can controll spool up rate
You can't put too much boost into these motors....
G'day & welcome aboard Steve
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