speedyquest Posted August 31, 2015 Report Share Posted August 31, 2015 I know this will be different depending on several factors including what type of setup your running but I'm curious to see what kind of range we would get hearing from everyone from stock setups to highly modified. I'll go first, I end up with -20psi of vacuum at idle Link to comment Share on other sites More sharing options...
scott87star Posted August 31, 2015 Report Share Posted August 31, 2015 As do I on my MPI car with one of Tim C's roller cams. Link to comment Share on other sites More sharing options...
mr-starion Posted August 31, 2015 Report Share Posted August 31, 2015 -21~ at idle on mpi stock cam Link to comment Share on other sites More sharing options...
93 GSX TURBO Posted August 31, 2015 Report Share Posted August 31, 2015 (edited) -18-20 stock tbi Edited August 31, 2015 by 93 GSX TURBO Link to comment Share on other sites More sharing options...
IntercooledFlatty Posted August 31, 2015 Report Share Posted August 31, 2015 right at 20 tbi stock Link to comment Share on other sites More sharing options...
speedyquest Posted August 31, 2015 Author Report Share Posted August 31, 2015 Sounds like there isn't a big difference then. Huh I would have expected a little bit more of a variance. Link to comment Share on other sites More sharing options...
IntercooledFlatty Posted August 31, 2015 Report Share Posted August 31, 2015 if someone is trying to read it with a stock gauge, get an inaccurate reading you will Link to comment Share on other sites More sharing options...
93 GSX TURBO Posted August 31, 2015 Report Share Posted August 31, 2015 My reading is off a mechanical boost gauge Link to comment Share on other sites More sharing options...
IntercooledFlatty Posted August 31, 2015 Report Share Posted August 31, 2015 mechanical, only way to gohttp://i.imgur.com/QyA3WnL.jpg Link to comment Share on other sites More sharing options...
wrngwae Posted September 1, 2015 Report Share Posted September 1, 2015 I run about -15hg, but my idle is 1000rpm+ due to working AC on my mpi. the idle drops with compressor and added fans with no "help" from the ecu. hurricane manifold ss valves and stock cam. Link to comment Share on other sites More sharing options...
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