BAman Member 133 Member For: 18y 1m 23d Gender: Male Location: sydney Posted 12/06/09 04:46 AM Share Posted 12/06/09 04:46 AM Not sure about the Nizpro springs consistency, mine have started to go soft after 20,000k's...My Nizpro springs have done 50 000kms with no drama. Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 9m 23d Gender: Male Location: SW Sydney Posted 12/06/09 04:55 AM Share Posted 12/06/09 04:55 AM And with ~12psi I'm sure they are fine, I was simply a little miffed when they claim the springs are rated some rediculous power level that is double what I'm running. Link to comment Share on other sites More sharing options...
bluprinturbo Donating Members 605 Member For: 16y 6m 19d Gender: Male Location: brisbane Posted 13/06/09 08:34 AM Share Posted 13/06/09 08:34 AM crow.also,according to a previous thread,your supposed to have valve springs installed at a correct height using shims,which could be different for each one.you would think that radical 800+rwkw valve springs would require this.I didnt get shims installed with my nizpro valve springs. Link to comment Share on other sites More sharing options...
01txr Member 861 Member For: 17y 10m 16d Gender: Male Location: QLD Posted 13/06/09 05:52 PM Share Posted 13/06/09 05:52 PM As stated in the other valve spring post, valve springs should always be installed atspecified height to obtain correct seat pressure.I have Nizpro springs in mine installed by previous owners mechanic, must be alrightas I have done over 30 000k's on them myself and they have seen 20psi @ 6500 withno problems.For my new engine whenever it happens I am going for Comp Cams conical springshave part number & specs somewhere from back months ago when I was pricing all bits up.I cant rember the specs but recall the price to have been around $580 wholesale. The seat and open pressureswhere very good and think the retainers where included.Sorry I cant tell much of them at present but sure if you did some searching you will find them.They may have been a v8 set to being USA made. Link to comment Share on other sites More sharing options...
Brooksy4L Member 8 Member For: 15y 5m 5d Posted 08/09/09 04:59 AM Share Posted 08/09/09 04:59 AM My BA XR6T is currently at the mechanics getting some Nizpro valve springs installed. Now the mechanic rang me and asked why the shims that came with the springs were different colours and sizes. So I said hold off, and rang Nizpro. After a bit of a discussion on my power figure and such, Nizpro fella told me to re-use the original shims, as the nizpro supplied shims could cause just a bit more stress on the spring.To put my mind at ease, has anyone used the nizpro spring and the standard shims from the BA? Just.. kind of stressing a little, seeing as I told the mechanic to use the standards, and hes nearly finished.Any help? Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 9m 23d Gender: Male Location: SW Sydney Posted 08/09/09 05:03 AM Share Posted 08/09/09 05:03 AM I have used the nizpro springs with standard shims, the sprins started to go soft at 19psi after about 15,000k's. Nizpro sent me the shims to fix it - haven't fitted them yet..If you are staying under 15psi with the standard turbo you should be fine without the shims mate, plenty of people ahve used them before. Link to comment Share on other sites More sharing options...
Brooksy4L Member 8 Member For: 15y 5m 5d Posted 08/09/09 05:17 AM Share Posted 08/09/09 05:17 AM Im running 15 psi... not looking to push that higher any time soon. Currently sitting on 29*kw... but its getting retuned later this month and will hopefully be pushing mid 300's.... cant forsee any issues? Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 9m 23d Gender: Male Location: SW Sydney Posted 08/09/09 05:37 AM Share Posted 08/09/09 05:37 AM Should be ok, mine didn't like 370rwkw Link to comment Share on other sites More sharing options...
Brooksy4L Member 8 Member For: 15y 5m 5d Posted 08/09/09 05:42 AM Share Posted 08/09/09 05:42 AM Yeah if I feel something, up above 350.. ill probly just switch to another spring combo, or put the shims in then... I guess. Link to comment Share on other sites More sharing options...
dalts Member 755 Member For: 18y 6m 4d Gender: Male Location: brisbane Posted 08/09/09 06:05 AM Share Posted 08/09/09 06:05 AM I have used the nizpro springs with standard shims, the sprins started to go soft at 19psi after about 15,000k's. Nizpro sent me the shims to fix it - haven't fitted them yet..If you are staying under 15psi with the standard turbo you should be fine without the shims mate, plenty of people ahve used them before.I agree if your running big boost they do go soft around those k,s, I changed mine and made a big difference at the strip,but if your running15-17 or less they will be finecheers lee Link to comment Share on other sites More sharing options...
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