Quote:
Originally Posted by aggie91
Great information here. Bookmarked for future use...
One question on "Pressure Regulator & Boost Valve basics, From a Sonnax Tech article"
Is it better to just do the Boost Valve size increase?
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When running a large ratio Boost Valve, The Pressure Regulator Spring cannot be over 15% stronger than the OE Spring....Anymore than that, Problems will surface particularly on the 4L80E.
Sonnax has Line Booster kits for both units that come with a Boost Valve & a 10% over PR spring.
TH400 part# 400-LB1
4L80E part# 4L80E-LB1