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stup stup is offline
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Join Date: Sep 2006
Location: scotland
Posts: 248
Originally Posted by Thierry25 View Post
Yes I also think the flow matching is done by the fuel head. I also suspect the difference with brand new injectors is quite low if they come from the same batch.
Thierry once you purchase your new injectors i would definately still test them even though they are new,test them with them fitted on the end of your injector lines but not fitted into your injector blocks...Test flow volume per 30 secs WOT into 6 individual bottles at the same time you may find you still need to adjust "" the meter head adjustment screws""..

The last few flow tests i have done on several 930's i have got the variation to within 2-3%....I also confirm this on light throttle(i.e meter plate approx 25%
open)and also confirm at meter plate 75% open!

It should be noted in taking your time adjusting and doing this and test correctly because i have seen several times now that you can be 2-3% at WOT but 12% at light throttle so its always best you can have best results under all simulated throttle postions although obviously WOT is most important!

If your very fortunate and find under all circumstances they are within 3% i would just leave them as is,as it can be easily adjusted and made worse or even threads can be damaged where screw caps in head need removed for adjustment!

If need any pointers when doing this just shoot me a PM.
SP Autobahn
Porsche inspector for Peter Morgan UK
"92" 964 turbo,Modified and recently rebuilt using all ARP hardware..
Purpose built fuel controller set up to acheive perfect fuel curve on CIS inj.
Old 01-04-2010, 12:53 PM
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