ZX TD Turbo boost pressure

Paul Thomas · Unread post by **Paul Thomas** » 12 Mar 2004, 15:55

I am considering tuning my ZX when the weather is a bit dryer.
What is the maximum turbo boost pressure I can safely go to without significantly decreasing the life of my turbo/engine etc ?

Unread post by **RichardW** » 12 Mar 2004, 16:21

Paul,
0.8 - 1.0 bar is stock for these engines. From what I have seen going much higher than 1.15 bar results in severely shortening the life of the head gasket. Do a search on the web for tuning 306 TDs as I think there is plenty of info out there.
Don't forget that if you're measuring boost pressure you need to do it with full load and engine over 3000rpm - eg hard hill climbing in 3rd.....

oilyspanner · Unread post by **oilyspanner** » 12 Mar 2004, 23:41

Tomorrow I am fitting a boost gauge to my BX 1.9TD I intend to boost it and will post results on this forum
Stewart

Unread post by **philhoward** » 12 Mar 2004, 23:57

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by RichardW</i>

Don't forget that if you're measuring boost pressure you need to do it with full load and engine over 3000rpm - eg hard hill climbing in 3rd.....
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
I thought full boost was produced by about 2000 rpm? Granted, uphill is necessary at full throttle to get max load...and max boost!

oilyspanner · Unread post by **oilyspanner** » 13 Mar 2004, 01:18

As I was running my car with the intercooler removed I noticed that the turbo is definitely blowing at idle which on both of my 1.9s is 1000rpm
Stewart

Unread post by **philhoward** » 13 Mar 2004, 02:05

The turbo will produce an airflow at idle; hope you didn't blip the throttle through as you'd probably overspeed the turbo with no output restriction.. The amount of air moved at idle by the turbo is still less than what the engine consumes...

oilyspanner · Unread post by **oilyspanner** » 14 Mar 2004, 15:20

Boost Gauge fitted, mine reads in PSI, highest I have seen yet is 15 PSI @ around 3000rpm climbing a big hill. thats around 1 Bar. Now wheres that pdf file got to....
Stewart