Kosij Donating Members 2,045 Member For: 13y 3m 20d Gender: Male Posted 01/02/13 04:47 AM Share Posted 01/02/13 04:47 AM Your measuring the wrong output! PSI = (MAP - BAP)*0.49109778 I was told! So your currently measuring MAP Get a real boost gauge and plum into you intake! 1 Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 6d Gender: Male Location: Probably above atmospheric pressure Posted 01/02/13 05:48 AM Share Posted 01/02/13 05:48 AM Yeah MAP reading is pressure in manifold (manifold absolute pressure), including normal air pressure on Earth (barometric absolute pressure/BAP) as mentioned above.+1 for get a real boost gauge, make it a good brand too not cheapo otherwise you will have 2PSI of boost when the engine is off like me, LOL. Link to comment Share on other sites More sharing options...
FlyingBAturbo Member 11 Member For: 11y 9m 30d Posted 01/02/13 06:41 AM Author Share Posted 01/02/13 06:41 AM Ok so that gauge in that pic was absolute pressure, but now I found actual boost gauge on obd2 app, and it's showing 4hg/in which I about 2.06psi so where is the rest of the pressure ?? Please help I am confused ... Link to comment Share on other sites More sharing options...
FlyingBAturbo Member 11 Member For: 11y 9m 30d Posted 01/02/13 07:34 AM Author Share Posted 01/02/13 07:34 AM Boost solenoid was done couple of months ago and TB was cleaned too , but I'll do it again anyway, how do I get crossover ported and polished ?? And how does diff bush affect boost ? And I never touched turbo oil feed so why it's causing over-boosting?? Sorry I asked too many questions as I am not familiar to turbosAny help would be much appreciated CheersGary Link to comment Share on other sites More sharing options...
BRK Member 361 Member For: 12y 11m 17d Gender: Male Location: Perth Posted 01/02/13 07:58 AM Share Posted 01/02/13 07:58 AM mate - honestly, they will send you out for a left handed screwdriver in a minute. Port and polish the crossover ....... jeez, someone is polishing something else saying that....although there are one or two enthuisiasts from the "top secret think tank" ...who think 0.5MM ground out of the crossover is going to produce 50KW. ( No names but there aliases are Clark Kent and Bruce Wayne).....Diff bush and oil line feed....... think about it.The MAP/BAP answer is the right one. 1 Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 3m 20d Gender: Male Posted 01/02/13 08:05 AM Share Posted 01/02/13 08:05 AM Go get a decent gauge and report back with the findings, I seen about 6psi when my ba was stock! If you really feel then need call your local dyno shop and for $70-100 they will run it up and advise you how your cars going. Link to comment Share on other sites More sharing options...
FlyingBAturbo Member 11 Member For: 11y 9m 30d Posted 01/02/13 08:37 AM Author Share Posted 01/02/13 08:37 AM The gauge is a genuine Blitz one and was working when removed from a VLTurbo it was in that car for a week only .My mind is just about to explode ... Yeah liked the answers on others forums, they are pretty much same but I am trying to get as much as info I can get .. Cheers Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 6d Gender: Male Location: Probably above atmospheric pressure Posted 01/02/13 11:46 AM Share Posted 01/02/13 11:46 AM Just checked and my boost logs have PSI=(MAP-BAP)/2.04 as the equation. Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 3m 20d Gender: Male Posted 01/02/13 12:08 PM Share Posted 01/02/13 12:08 PM There is NO way you can get 8~psi in neutral! Gauge is FARKED you won't get much help here if you don't listen to what "the educated" people have suggested! Link to comment Share on other sites More sharing options...
johno Donating Members 773 Member For: 14y 1m 20d Gender: Male Location: Mt Gambier, SA Posted 01/02/13 12:10 PM Share Posted 01/02/13 12:10 PM Why dont you just take to a decent tuner(not tuna) and get it looked at properly. You are fighting a loosing battle here. 1 Link to comment Share on other sites More sharing options...
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