Stock boost on MINES ecu ?

[chris2o2]

I've been doing a bit of searching and questioning some members on this MINES ecu thats fitted to my j-spec auto TT .

 

As some of you may know the MINES ecu was quite a popular mod to the j spec tt's it seems , the MINES ecu will remove the speed limit and the fuel cut - im also under the impression they are mapped to around 1.1bar .

 

My car is semi-bpu stage , i was in the process of trying to buy a FCD when i realised the ecu shouldnt need one and then realised my car only boosts to 0.7bar .

 

MINES ecu ,Apexi SAFCII , 2nd cat removed , wallbro fuel pump , Apexi boost gauge , ik22 plugs , blitz nur spec and RLTC - is the spec of my car at the moment , i have no boost controller either yet . Surely the car should be making more than 0.7bar boost ?

 

What reasons could they're be for it sticking at 0.7? Does the SAFCII have anything to do with it ? I dont have a clue what that does anyway , it looks good and has a lot of number on the screen !

 

No piss taking if i've missed something silly here , im still quite new to these turbo engines .

 

Thanks in advance.

[jamesmark]

The first cat is stopping you boosting, it's that simple.

 

The 1st cat is the most restrictive and you see either no gain or a 0.1 gain removing only the 2nd.

 

If you car has J-Spec turbos all you need to do is buy a 1st decat and a restrictor ring, a restrictor ring is needed on J-Spec turbos as they will overboost and then go pop.

 

I personally would go this route, 1st decat installed with a 1 bar restrictor ring (limits boost to 1 bar) also install a boost controller to then raise the boost to 1.1 bar or 1.2 bar.

 

If you cannot afford to get a boost controller you can just go for either a 1.1bar or 1.2 bar restrictor ring but then you have no control on boost up to that level, using a 1 bar RR and BC at least gives you some control over boost.

Edited June 12, 2008 by jamesmark (see edit history)

[Scott]

Can't be the first CAT. I had the first one in place for months before getting shot of it. I was making 1-1.1 bar.

[jamesmark]

Can't be the first CAT. I had the first one in place for months before getting shot of it. I was making 1-1.1 bar.

 

 

Were you raising the boost with a boost controller? As I have read a few people have kept first cat in place and raised the boost which is not really advisable.

 

On my J-Spec TT I was the same, 2nd decat with cat back exhaust and 1st cat still in place and I saw no gains what so ever.

[Scott]

No, Mines ECU raises the boost via some electronic method that tDR explained to me lol.

[chris2o2]

Yeah i'll go boost controller ,restrictor ring and de-cat i think just to be one safe side , the cars quick enough really already ! but a tad more power would be nice .... just incase.

 

It was after speaking to Scotster via pm i though that mine would have been the same if the ecus mapped to 1.1bar .

 

Thanks for the help anyway gents .

[TurboBrett]

On my J-Spec TT I was the same, 2nd decat with cat back exhaust and 1st cat still in place and I saw no gains what so ever.

 

i hit fuel cut tonight for the first time, scary a phook mine is a j-spec, 3" hks second decat and full 3" cat back system no boost controller boost gauge read just under 1 bar, i was watching it as it went further than usual, it hit 13.5psi in the heat earlier in the week, so i reckon (atleast for my supe) its about right but its that every supra is different i suppose

 

anyway doesnt the Apexi SAFCII play about with fuel? so there is nothing to increase the boost over the usual i have read the mines ecu increases the boost created however i have no experience with this unit so i cant comment if every thing else works as it should id just decat, rr and a controller;)