Kosij Legacy Donating Member 2,045 Member For: 15y 23d Gender: Male Posted 01/02/13 04:47 AM 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
discostig Manual mode ________________________ All day, erryday Legacy Donating Member 13,798 Member For: 18y 9m 9d Gender: Male Location: Probably above atmospheric pressure Posted 01/02/13 05:48 AM 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.
FlyingBAturbo Member 11 Member For: 13y 7m 3d Posted 01/02/13 06:41 AM Author 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 ...
FlyingBAturbo Member 11 Member For: 13y 7m 3d Posted 01/02/13 07:34 AM Author 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
BRK Member 361 Member For: 14y 8m 21d Gender: Male Location: Perth Posted 01/02/13 07:58 AM 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
Kosij Legacy Donating Member 2,045 Member For: 15y 23d Gender: Male Posted 01/02/13 08:05 AM 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.
FlyingBAturbo Member 11 Member For: 13y 7m 3d Posted 01/02/13 08:37 AM Author 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
discostig Manual mode ________________________ All day, erryday Legacy Donating Member 13,798 Member For: 18y 9m 9d Gender: Male Location: Probably above atmospheric pressure Posted 01/02/13 11:46 AM Posted 01/02/13 11:46 AM Just checked and my boost logs have PSI=(MAP-BAP)/2.04 as the equation.
Kosij Legacy Donating Member 2,045 Member For: 15y 23d Gender: Male Posted 01/02/13 12:08 PM 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!
johno Legacy Donating Member 773 Member For: 15y 10m 23d Gender: Male Location: Mt Gambier, SA Posted 01/02/13 12:10 PM 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
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