998 Turbo Not Getting Boost Till 4500Rpm
#1
Posted 10 April 2017 - 01:56 PM
Sorry for the lengthy description.
Cheers Tim
#2
Posted 10 April 2017 - 05:35 PM
Also check for an AR number on the turbine housing, somthing like .36 or
.42
#3
Posted 10 April 2017 - 06:33 PM
As Joe said, are you driving it & not just revving it up stationary ?
Are you sure it's the standard Renault 5 spec & not some aftermarket hybrid etc. ?
Phil.
#4
Posted 10 April 2017 - 08:07 PM
Merv
#5
Posted 10 April 2017 - 08:33 PM
Cheers Tim
#6
Posted 10 April 2017 - 08:48 PM
What cam are you using?
Edited by coopdog, 10 April 2017 - 08:49 PM.
#7
Posted 10 April 2017 - 08:57 PM
Tim.
#8
Posted 11 April 2017 - 08:50 AM
hmm,
ok, knt 266 is probably a bit hot, I think that will be contributing, I would be looking at a Kent 500 or a standard metro cam. also do you know what the cam is timed at? if its a bit retarded that might not be helping. also 1.5 rockers will not help if they are fitted
also somtimes with turbines replacements are larger if stock is an issue, on the metro T3 the 0.28 AR is not available sothey use the 0.36 from the RS turbo.
Edited by mini13, 11 April 2017 - 08:50 AM.
#9
Posted 11 April 2017 - 09:07 AM
#10
Posted 12 April 2017 - 09:54 AM
#11
Posted 12 April 2017 - 08:03 PM
#12
Posted 14 April 2017 - 07:46 PM
The actuators set to roughly 10psi. I tried it again today bypassing the intercooler/pipework and very gingerly took it up the road and it did see things improve slightly, I was starting to see boost at around 3500. Not sure if I've really proved anything by doing that though. Haven't had a chance to get the turbo off yet Friday is looking like the best bet.
Set to, designed for, preloaded to - all different. What if there isn't enough preload on the spring then it will begin to open early but still hold your ideal boost by the turbo working much harder that it should. May not be the issue, but start basic and work backwards.
#13
Posted 15 April 2017 - 02:11 PM
Thanks for all the advice guys, it's really appreciated.
#14
Posted 15 April 2017 - 02:52 PM
#15
Posted 15 April 2017 - 03:04 PM
Half a hole of tension?
Spot on chap!
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