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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,249
That is pretty much what I have been doing Brian - using a mighty vac pump. Pumps running, WUR powered up by separate battery source to get/set WP. Then pressurise WUR with Mightyvac watching the WP drop. It is static until about 0.5 bar boost. Then drops by over 1 bar, more boost pressure (eg 1 bar) does not increase the drop. I am puzzled why the drop is so large. I removed the stock spring in the base of the WUR (the one the boost pressure works against) and replaced it with one 2x stronger. Same result (0.2 bar WP better). If I can get this back to near normal, happy to bolt it all up and try it out. Even settle for 1 bar WP drop.
83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 11-07-2017, 04:50 PM
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