massive overboost promlem :(
28-07-2004, 10:37 AM
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massive overboost promlem :(
first of all, sorry for posting in the wrong section stu, pet ect but kinda need a quick answer as per usual 
mates car (cossie kit car) is ment to be running the normal 1.6 bar boost.
problem is were getting massive spikes of over 2 bar before it holds at 1.4 ish
he did have a -34 actuator on it but now has a -31 and its made no difference!
anyone got any ideas?
its running a t34.48 if that makes a difference.
PLEASE HELLLLLLLLLLLLLLLLLLLLLLLLLLLLP
mates car (cossie kit car) is ment to be running the normal 1.6 bar boost.
problem is were getting massive spikes of over 2 bar before it holds at 1.4 ish
he did have a -34 actuator on it but now has a -31 and its made no difference!
anyone got any ideas?
its running a t34.48 if that makes a difference.
PLEASE HELLLLLLLLLLLLLLLLLLLLLLLLLLLLP
28-07-2004, 10:48 AM
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no amal valve, he has a bleed valve fitted so he can fine tune the boost level but dont think its got anything to do with that as we tried 3 in total and it still does it
pretty sure there are no air leaks
but it could be that i supose thing is, would an air leak in one of the hoses cause that amount of overboost? its shutting down everything as soon as you plant it
pretty sure there are no air leaks
but it could be that i supose thing is, would an air leak in one of the hoses cause that amount of overboost? its shutting down everything as soon as you plant it
28-07-2004, 10:53 AM
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how long is the pipework before the actuator?
if its REALLY long then this will cause it, as it takes a while for the hose to pressurise so the actuator lags behind...
this can be nasty on unlaggy turbos like wwin T2s
as the fookers will spike at about 3times what they should hold
if its REALLY long then this will cause it, as it takes a while for the hose to pressurise so the actuator lags behind...
this can be nasty on unlaggy turbos like wwin T2s
as the fookers will spike at about 3times what they should hold
28-07-2004, 10:54 AM
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ok cheers guys, will check the boost hoses 
stu, you could be right acually as he snaped the wastegate arm a little while back and had to weld it back together i guess he may have done somthing to make it stick then
anyway thanks
stu, you could be right acually as he snaped the wastegate arm a little while back and had to weld it back together
i guess he may have done somthing to make it stick then anyway thanks
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28-07-2004, 11:02 AM
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not sure mate will have to ask him probably is that though as he braced it up with webbing like fook so it wouldnt break again
bit obvious no that youve said it but you know how it is when your trying to think of a problem and just keep looking at the same thing
thanks
will have to ask him probably is that though as he braced it up with webbing like fook so it wouldnt break again bit obvious no that youve said it but you know how it is when your trying to think of a problem and just keep looking at the same thing
thanks
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