Matti85 Posted July 18, 2007 Share Posted July 18, 2007 Before i fitted the decat pipes, i hit fuelcut, i tryed this out 4 times, hited fuelcut everytime. Now ive fitted the FCD, took it out for a test drive, hit the throttle, boost goes to 0.5 bar, and then 1 bar when second comes in. I let go of the throttle and pushed it down again later, now it went only to 0.5 bar. Took the car back to garage, opend the hood and saw one of the smaller vacum pipes loose, put it back and fitted a clip on it. Now i took the car out again, hit the throttle, and the car did the same, 0.5 bar and 1 bar when second comes in, then i pushed again, and nothing happens, no boost at all. Back to garage, opend hood and see that one of the Bigger lower ic pipes is all loose. Now i removed all ic pipes, will give them a clean and put new clips on them and tight them like hell. But man, should it be so hard. And whats up with the 1 bar thing, why do the pipes come loose after the FCD fitting and not before, maybe it overboost and gauge cant keep up, but shouldnt i feel it then, it feelt just like 1 bar. Ive been told i will feel the diffrence between 1 bar and 1.2 and that i did not so i dont thing it did overboost. So i thought all jspecs will overboost after decated, ive not even fitted a ring, dont need to if it cant get above 1 bar ? Was looking forward to 1.2 bar. Quote Link to comment Share on other sites More sharing options...
Mas Posted July 18, 2007 Share Posted July 18, 2007 Do you have a boost controller ? if so it might be set to 1 bar! Check the VSV hoses again mate, I ended up having problems with boosting before that was only due to vsv hoses not been blocked, but I was boosting 1.7 Quote Link to comment Share on other sites More sharing options...
Nic Posted July 18, 2007 Share Posted July 18, 2007 Do you have a boost controller ? if so it might be set to 1 bar! It wouldn't make a difference, that wouldn't stop it from exceeding 1bar. Quote Link to comment Share on other sites More sharing options...
Nic Posted July 18, 2007 Share Posted July 18, 2007 You've removed both cats yes? Sounds like it's a problem with a leak somewhere, check and refit all the IC pipes and vacuum hoses first, once you're happy there are no leaks try again. There is a big difference between 1bar and 1.2bar Quote Link to comment Share on other sites More sharing options...
letmeshowyou Posted July 18, 2007 Share Posted July 18, 2007 an ecu reset wouldn't go amiss either Quote Link to comment Share on other sites More sharing options...
Matti85 Posted July 18, 2007 Author Share Posted July 18, 2007 No boost controller, ill check all hoses before taking it out again. But you all agree with me that i relly should go above 1 bar, since it being a jspec, steel blades in turbos but thats all. ECU alwyas reset after removing - pole on battery, and i always do that before doing any mechanical with the car. Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted July 18, 2007 Share Posted July 18, 2007 i'm full BPU but only hit 1 bar in the summer (about 1.2 in the winter) without any restrictor rings ! Its rare but told by few members not uncommon. I use a boost controller to up the desired boost. Quote Link to comment Share on other sites More sharing options...
gaz1 Posted July 18, 2007 Share Posted July 18, 2007 make sure when you have checked the hoses you have some way of controling your boost as you will end up knackering you engine i know, (my first fuck up) Quote Link to comment Share on other sites More sharing options...
r1george Posted July 18, 2007 Share Posted July 18, 2007 I'm not 100% sure but I think FCD's are adjustable to the point where ther invoke fuel cut, are you getting feul cut or just can't make more than 1.0bar boost. Quote Link to comment Share on other sites More sharing options...
Matti85 Posted July 18, 2007 Author Share Posted July 18, 2007 as i hitted fuelcut before fitting FCD, i now know how it feels, so no i dont hit fuel cut anymore, it jsut does not go past 1 bar. Gaz, what do you mean control your boost or it will knacker the engine ? Quote Link to comment Share on other sites More sharing options...
Joeatphr Posted July 18, 2007 Share Posted July 18, 2007 What he is saying is if you do overboost then you will blow your motor. I would get a BCC and a Boost Controller as soon as you can! It is just a safe and proper way to do it. You also will need it in the future if you plan to make more power. I would be sure to get an electronic BC like HKS EVC 6 or something around that. Well made and well tested! Let me know how things go. Cheers, Joe Quote Link to comment Share on other sites More sharing options...
Matti85 Posted July 18, 2007 Author Share Posted July 18, 2007 I got Greedys BCC alredy fitted, thing is i think i would feel if it goes over 1 bar, since diffrence between that and 1.2+ is huge apprently, so how can i overboost if i dont feel it ? I hopped i would not need to buy a Controler to raise boost since its a jspec and should reach more then 1.2 when decatted. But i guess im that unlucky million that acutally need a controler to up the boost on my car. Quote Link to comment Share on other sites More sharing options...
MarkTheBoy Posted July 18, 2007 Share Posted July 18, 2007 Mine only boosts to about 1 bar I hit boost cut several times after fitting my exhaust about six months ago (winter) but no matter how hard i stamp on the throttle now i dont get boost cut anymore. I bought a fcd after hitting boost cut but never fitted it as it didnt happen very often and now not at all. I thought that once decatted with a decent exhaust mine would boost as far as my restrictor ring would allow (Whifbitz 1.2bar ring) but unfortunately no joy! I seem to be in the same boat as Matt Quote Link to comment Share on other sites More sharing options...
flukey-lukey Posted July 18, 2007 Share Posted July 18, 2007 Same here But I get a constant 1.1 bar, which I'm happy with atm Quote Link to comment Share on other sites More sharing options...
letmeshowyou Posted July 18, 2007 Share Posted July 18, 2007 Matti, out of interest, what year is yours? Quote Link to comment Share on other sites More sharing options...
hadyn Posted July 18, 2007 Share Posted July 18, 2007 I couldnt get more than 1.1 bar out of my old BPU car on a shagged SMIC... Quote Link to comment Share on other sites More sharing options...
Matti85 Posted July 19, 2007 Author Share Posted July 19, 2007 My car is 93 mate, and as for my SMIC its brand new, the aluminium one from MiamiGT. Quote Link to comment Share on other sites More sharing options...
hadyn Posted July 19, 2007 Share Posted July 19, 2007 Put it as one of those things mate. My car ran amazingly well, but would only hit 1-1.1 bar. It was an incredibly quick road car with that boost and pulled 13.3 1/4 miles all day without any hard launching etc on big heavy 18" split rims. Enjoy the car and if you're that desperate for 1.2 bar, wind it up with a boost controller... Quote Link to comment Share on other sites More sharing options...
jase_93tt Posted July 19, 2007 Share Posted July 19, 2007 When I had the stock twins on my Jspec, and had double de-cats fitted, with nothing other than intercooler, exhaust and air intake mods and FCD, I was hitting 1.25 bar. The Jspecs have the overboost problem due to the weak actuators on the turbos (?). I remedied the problem by putting the primary cat back on. Boost went down to 1.1 bar which is much safer. After that I went single! Quote Link to comment Share on other sites More sharing options...
Suprasteve Posted July 19, 2007 Share Posted July 19, 2007 Put it as one of those things mate. My car ran amazingly well, but would only hit 1-1.1 bar. It was an incredibly quick road car with that boost and pulled 13.3 1/4 miles all day without any hard launching etc on big heavy 18" split rims. Enjoy the car and if you're that desperate for 1.2 bar, wind it up with a boost controller... Quote Link to comment Share on other sites More sharing options...
madwoody1 Posted September 14, 2007 Share Posted September 14, 2007 well my car was over boosting (16+psi)and hitting fuel cut a fair amount lately wasn't sure what was causing it but worked out that my exhaust(apexi gt) and second decat (hks race only) was too free flowing so put a baffle in to the rear of the back box now runs at 15psi so spot on and no fuel cut so could it be that you exhaust has to much restriction in it? Quote Link to comment Share on other sites More sharing options...
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