picked my new (to me) gt4 up today
Discussion
Mr E said:
Mine did it all the time on almost standard tune with a blitz spec nur and no cats. Most easy to provoke by going WOT in 2nd or 3rd, and then upshifting after the turbo had fully spooled and was providing maximum boost.
Probably helped a lot by the Blitz having such a good flow. I was looking into getting the Nur Spec they developed for the Civic Type R, thinking it would be the same as the Nur Spec for all the other cars they did - louder than most, with an incredibly aggressive snarling tone. Unfortunately, the one they did for the Civic is apparently "almost OEM" and "Barely louder than standard" - sounds like a piece of overpriced crap in my opinion! It's a shame they didn't apply the same ideals they do for the turbo exhausts as they did the Type R unit.There is a known issue with ST205s if you run a full Blitz, pull the cats and change the flexi. It can actually flow too well, and the wastegate cannot cope leading to overboost and fuel cut.
I had fuel cut once (very very cold day, lots of right foot on an overtake). It feels like you've hit a brick wall, the engine light comes on and the ECU drops into limp mode. I genuinely thought I'd blown the engine to bits...
I had fuel cut once (very very cold day, lots of right foot on an overtake). It feels like you've hit a brick wall, the engine light comes on and the ECU drops into limp mode. I genuinely thought I'd blown the engine to bits...
Mr E said:
I had fuel cut once (very very cold day, lots of right foot on an overtake). It feels like you've hit a brick wall, the engine light comes on and the ECU drops into limp mode. I genuinely thought I'd blown the engine to bits...
I've been in a car (not a Celica) that has done that before, what a shunt it gives!You could get around it by custom mapping your car to the Blitz though, the Honda stuff I'm looking at now, a lot of the owners are pretty keen on mapping the cars with a lot of care based on the exact parts they are using. Most of the time you can add your manifold, decat and exhaust and stick a generic pre-developed map on, but every now again you get a variable falling out of tolerance (like the Blitz providing more flow than the map might account for) and you've got a problem on your hands.
Fuel cut is to do with boost been set to high, not the exhaust although the exhaust can be q factor with somebody tuning there car when they dont know what there doing, the celicas fuel cut on a standard map is 1.2 bar. Any more and when you reach max boost it will just stop fueling which causes the brick wall feeling also cracking a piston ringland and cause detting, the problem people have is upping there boost from standard 0.8 but not taking into account modifications having other affects on the map. The gtfours ecu is capable of running a decat and performance filter without a tweak any more and you need a new standalone ecu or a piggyback as the standard ecu is not mappable.
Mr e wasnt disagreeing with you pal as what your saying is right, i just ment that theres other aspects to the fuel cut problem, or maybe i have picked up something wrong along the way, im always willing to learn and take other peoples info on things on board. Sorry if it came accross that i was trying to correct you.
o0myles0o said:
vectracal said:
What does FCD stand for?
Fuel Cut Defender(?)You have no fuel maps for more than 17.5PSI, yet want to remove the last ditch safety mechanism that prevents detonation when the maps run out. Do you not like your engine?
If the ecu is mapped for more boost, and everything else can support it, then by all means go for it, but a FCD on a car with stock ECU + Fuelling always seemed to be asking for trouble...
Personal opinon and all that...
that car i as clean as my old st205 wrc! miss it now! mine went to Poland and was converted to lhd by a car nut there!
mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
200Plus Club said:
that car i as clean as my old st205 wrc! miss it now! mine went to Poland and was converted to lhd by a car nut there!
mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
I would of thought at 1.6 bar have been closer to 450 than 350?mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
Mr E said:
Yup, and as above I've never quite seen the point.
You have no fuel maps for more than 17.5PSI, yet want to remove the last ditch safety mechanism that prevents detonation when the maps run out. Do you not like your engine?
If the ecu is mapped for more boost, and everything else can support it, then by all means go for it, but a FCD on a car with stock ECU + Fuelling always seemed to be asking for trouble...
Personal opinon and all that...
ahh i see, i dont really like the idea of them so i think i will steer clear.You have no fuel maps for more than 17.5PSI, yet want to remove the last ditch safety mechanism that prevents detonation when the maps run out. Do you not like your engine?
If the ecu is mapped for more boost, and everything else can support it, then by all means go for it, but a FCD on a car with stock ECU + Fuelling always seemed to be asking for trouble...
Personal opinon and all that...
200Plus Club said:
that car i as clean as my old st205 wrc! miss it now! mine went to Poland and was converted to lhd by a car nut there!
mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
nice figures mate, that boost is very high i bet that frew you back.mine made 354bhp and 335ft/lb at 1.6bar on a hybrid stage 3 fensport turbo/forged pistons with apexi ecu. 300bhp and 300ft/lb at 4,500rpm as well which was a great power spread. took it to the nurburgring and did loads of trackdays in it.
i dont think i will ever sell mine im too in love
liamsp said:
Never fit an FCD to a GT4 the fuel cut is there for a reason. I have a blitz ebc that has an emergency feature where if it runs to high boost for whatever reason it backs it off. Alot better than hitting the fuel cut & headbutting the windscreen.
i wont be fitting an FCD mate, i would rather headbutt windscreen rather than kick my self for blowing my engine.i had alook at them blitz ebc but they are very pricey.
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