happydude303

iTrader: (1)

i was out in my car tonigth and i decied it was time to test this new clutch to se if can take the grunt under mapping condition i.e in the higher gears foot to the floor and let it build in from about 3 grand when i noticed my boost was hitting 1.8 bar on my gaauge this should only be 1.6 really as it is a 20g i run a sim tec witha perin 3 port boost selionoid no boost cut no det no knock warring flashing up on the dash is this the cold air or somthing else p.s the nice clutch that dave at api sold me seems to cope just fine thats a plus

joz8968

iTrader: (13)

If the sensors sense that everything's fantastic, then the ECU can momentarily instruct the BCS for more boost duty. And nice dense air/low ambient temps are ideal condtions for this to happen. But I am alarmed that it gave you a full 0.2bar more!

I've noticed mine get to no more than only 1.38bar (mapped target boost is 1.3).

happydude303

iTrader: (1)

yeah that what i was thinking 0.2 is a lot unless it was mapped to 1.7 or my gauge is out but when the car was first mapped it had the old five speed box in now it got a six speed in, we did tweak the map but the old clutch was slipping maybe now the new clutch is in an now taking the grunt maybe this would explain it. just wanted some tec veiws so when i take it back for a tweak i might have some extra knowledge

happydude303

iTrader: (1)

what i need to do is get my big brake kit on and get this car up to mr jolly green monster so he can do a complete remap and i need to get this up pipe of harvey as well but i just need to sort my dollar out shold be ready to go by the end of the month

joz8968

iTrader: (13)

I'd check with your mapper first, to find out what the EXACT boost profile was that he mapped at (and tell him what happened re the +0.2bar anecdote). Then evaluate from there....

STiFreak

iTrader: (4)

Defi gauge? The boost gauges usually read about 0.1 bar over for some reason. If so a 0.1 bar overboost could just be down to the cold air.

APIDavid

iTrader: (4)

It is a phenomenon that can occur in higher gears and it is something that we test for when we do a road run after a rolling road set up. Pat did tell me why a while back, but some of that stuff goes in one ear and doesn't settle on the way through.

It's not ideal and I imagine it can be controlled by per-gear boost control - if it is available on your ecu.

Maybe one of the mappers will pick this up and answer properly.

David

PS I agree with the post above; Defi's are for show not accuracy.........................

happydude303

iTrader: (1)

this gauge is a hks gauge but then it is some years old now humm i htink ill takeit to my normal mappers then get the brakes and uppipe for my rcm headers from harvey and take it to the jolly green monster for some extra nice treatment

happydude303

iTrader: (1)

It's not ideal and I imagine it can be controlled by per-gear boost control - if it is available on your ecu.

Maybe one of the mappers will pick this up and answer properly.

David


its a sim tec david oh and once again cheers for that clucth it doing well i run it in nice and easy for a weak and it now taken the 390bhp 365ft well that your exceedy 400-400 one spot on

dynamix

iTrader: (3)

Simtek boost control is normally pretty good from what i have seen so i would be inclined to think that the boost gauge is optimistic along with perhaps a mild spike in boost caused by cold weather and extreme loading.

If it is really boosting to that then at least you have tested what it can do and survived

Jolly Green Monster

iTrader: (4)

assuming your 6spd now has longer 5th and 6th than the original 5spd (looking at pic looks like a WRX?) therefore the load is greater causing higher boost.. if the adjustment made for the 6spd was with a slipping clutch then the load would be different and I presume whomever was doing it would have stopped at that point and said come back once clutch changed?

SimTek does have in gear boost control, I do sometimes find on some setups the perrin 3ports actually cause overboost and can be a pig to setup, yet other times work perfectly, seems related to turbo, exhaust etc used.

Simon

happydude303

iTrader: (1)

my turbo is made by cr tubos by graig who use to wrok at turbo dynamics the austrailian chap td 05 20g 7cm the exshuast was from my old fav swap shop sva but i have no idea what it is but its a 3 inch system open neck down pipe liek you say ill take it back now and get it look at and when i have my brakes don and my upipe so i can get rid of the rcm up pipe that comes with there headers ill try and get it booked in with your self simon p.s it is a wrx check all my mods are on my page as well if that helps, the six speed is from a jap spec sti 3.9 ratio

happydude303

iTrader: (1)

well i got my self down triton today to see andy vey and we took it out and check it all at it apears my gauge is not that good lol it was boosting to 1.64 as it should be and the gauge was showing 1.8-1.9 then it was and old gaauge, so he did a few little tweaks just beucase we out in it happy days oh and they use some cogs out of my old 5 speed and let me have a god speed big brake kit for free which they had floating around , oh a new plugs just becuase i felt like it top guys , oh and that api clutch is realy doing it stuff