focus st boost dropping
14-08-2010, 09:10 PM
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focus st boost dropping
just wondering if anyone could shed some light on a friends focus st, he has a milltek stainless exhaust and sport cats, has an uprated intercooler but unsure of make... it has graham goode filter mod, and has a bluefin stage 3, lately it peaks near the red and drops back to 3/4 of the way on boost gauge, at around 5000 revs it drops off more to half way and doesnt pull that well, we plugged in a scan gauge today and noticed the charge air was reaching 29-30c, ambient was 14c and damp, is this normal??? any help or ideas would be appreciated. 
14-08-2010, 09:15 PM
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Do these suffer from heat summit or other, my mates focus rs was doin the same when it got to a certain temp the bhp and boost dropped off he had to have a new intercooler to cope with the boost. Pro Alloy cooler he had. Not sure if this is the same but thats my 2p (prob wrong 
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