Bazza Posted May 13, 2006 Report Share Posted May 13, 2006 got a problem with my starlet turbo runs fine up to 3500 rpm and reaches 1 bar boost after 4000 rpm the boost just drops off and by 7000 rpm its at 0.5 bar actuator is HKS set at 1 bar was informed that no leaks were present now generally they suffer with boost creep but this seems the opposite boost spike springs to mind, but its not boosting over what its meant to on a dyno it reaches peak power and torque by 5000 rpm, and yet it will happlily rev to 7500 rpm so has anyone got a clue ? Quote Link to comment Share on other sites More sharing options...
nick the greek Posted May 13, 2006 Report Share Posted May 13, 2006 Have read about this over at IMOC, but no solution was forthcoming if my memory serves me rightly.... sorry mate! BTW, what were it's characteristics (SP?) before? and what turbo is in your car? Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 13, 2006 Author Report Share Posted May 13, 2006 so i am not alone somehow thats comforting to know i keep getting a lot of "i dont knows" Quote Link to comment Share on other sites More sharing options...
nick the greek Posted May 13, 2006 Report Share Posted May 13, 2006 so i am not alone somehow thats comforting to know i keep getting a lot of "i dont knows" Will let you know if I come across any more info Quote Link to comment Share on other sites More sharing options...
Jap Devil Posted May 14, 2006 Report Share Posted May 14, 2006 got a problem with my starlet turbo runs fine up to 3500 rpm and reaches 1 bar boost after 4000 rpm the boost just drops off and by 7000 rpm its at 0.5 bar actuator is HKS set at 1 bar was informed that no leaks were present now generally they suffer with boost creep but this seems the opposite boost spike springs to mind, but its not boosting over what its meant to on a dyno it reaches peak power and torque by 5000 rpm, and yet it will happlily rev to 7500 rpm so has anyone got a clue ? Sounds like it could be the fuel cut defender starting to cut in. Do you have the car remapped through a piggy-back ECU? Maybe needs tweaking a little. Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 14, 2006 Author Report Share Posted May 14, 2006 got a problem with my starlet turbo runs fine up to 3500 rpm and reaches 1 bar boost after 4000 rpm the boost just drops off and by 7000 rpm its at 0.5 bar actuator is HKS set at 1 bar was informed that no leaks were present now generally they suffer with boost creep but this seems the opposite boost spike springs to mind, but its not boosting over what its meant to on a dyno it reaches peak power and torque by 5000 rpm, and yet it will happlily rev to 7500 rpm so has anyone got a clue ? Sounds like it could be the fuel cut defender starting to cut in. Do you have the car remapped through a piggy-back ECU? Maybe needs tweaking a little. no fuel cut ! managed by e-manage car is mapped to 1 bar in an attempt to solve the problem all factory solonoids were removed actuator is simply controlled by an in-line valve Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 14, 2006 Author Report Share Posted May 14, 2006 BTW, what were it's characteristics (SP?) before? and what turbo is in your car? hard to tell when on the dyno at janspeed it was pretty much as standard, boosted to 0.6 (as per factory settings) but due to free flowing decatted exhaust it then creeped to 1bar reached 130 bhp and 121 torque now reaches 125 bhp and 145 torque before the boost drops off actuator is now HKS which should be set at 1bar never really had chance to use before the latest mods so hard to tell using toyota ct9 which are fairly well known to be able to take 1bar am now thinking along the lines that if the actuator is set lower than 1 bar and the initial boost level is just spiking, and then the actuator kicks in, all but at a lower than supposidly set level anyone ? Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 17, 2006 Author Report Share Posted May 17, 2006 bumpity bump Quote Link to comment Share on other sites More sharing options...
Tony Posted May 17, 2006 Report Share Posted May 17, 2006 bumpity bump tdiplc any thoughts on this topic? Quote Link to comment Share on other sites More sharing options...
jon Posted May 18, 2006 Report Share Posted May 18, 2006 am now thinking along the lines that if the actuator is set lower than 1 barand the initial boost level is just spiking If it were my car i'd be looking here first Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 18, 2006 Author Report Share Posted May 18, 2006 will be looking at this tomorrow resetting the actuator and seeing what results from it fingers crossed Quote Link to comment Share on other sites More sharing options...
nick the greek Posted May 18, 2006 Report Share Posted May 18, 2006 baz, let me look over on some forums i've read about this problem before, will let you know i fi find anything Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 18, 2006 Author Report Share Posted May 18, 2006 baz, let me look over on some forums i've read about this problem before, will let you know i fi find anything cheers nick all help appreciated Quote Link to comment Share on other sites More sharing options...
TDIPLC Posted May 19, 2006 Report Share Posted May 19, 2006 The best thing is to get it looked at properly - preferably by someone that knows what they are looking at. An FCD won't cause this problem - it has no control over the boost whatsoever. When it's on a dyno you can visibly check the actuator movement, audibly check all of the pneumatic connections for leaks, and conduct an exhaust back pressure test. That's the best way forward Barrie, otherwise much wasted time and pulled out hair will result. Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 19, 2006 Author Report Share Posted May 19, 2006 The best thing is to get it looked at properly - preferably by someone that knows what they are looking at. An FCD won't cause this problem - it has no control over the boost whatsoever. When it's on a dyno you can visibly check the actuator movement, audibly check all of the pneumatic connections for leaks, and conduct an exhaust back pressure test. That's the best way forward Barrie, otherwise much wasted time and pulled out hair will result. i totally agree Mark no FCD being that it was a new HKS actuator, specified for the car, i was reluctant to believe it would be wrong it was mentioned by the mechanic who had just set it up, about the lack of air available ??, i felt this was strange as the smallest part of the incoming flow is the turbo itself thought i would take a look at re-routing the intake to avoid passing over the manifold area and guess what i found ? the intake pipe which was standard is made of metal, on the final connection to the turbo it has a rubber sleeve on the inside this sleeve had been squashed to the effect that one half was actually across the airflow, reducing incoming air by half the other danger is that it could have split, and theres only one way it could go, yes ! straight into the turbo anyway replaced the pipework and guess what ! yes full boost right through the rev range slightly overboosting at 7000 revs what a difference it makes now i am somewhat relieved but also not very happy with the work that was carried out Mark how busy is that dyno of yours ?? Quote Link to comment Share on other sites More sharing options...
TDIPLC Posted May 19, 2006 Report Share Posted May 19, 2006 The best thing is to get it looked at properly - preferably by someone that knows what they are looking at. An FCD won't cause this problem - it has no control over the boost whatsoever. When it's on a dyno you can visibly check the actuator movement, audibly check all of the pneumatic connections for leaks, and conduct an exhaust back pressure test. That's the best way forward Barrie, otherwise much wasted time and pulled out hair will result. i totally agree Mark no FCD being that it was a new HKS actuator, specified for the car, i was reluctant to believe it would be wrong it was mentioned by the mechanic who had just set it up, about the lack of air available ??, i felt this was strange as the smallest part of the incoming flow is the turbo itself thought i would take a look at re-routing the intake to avoid passing over the manifold area and guess what i found ? the intake pipe which was standard is made of metal, on the final connection to the turbo it has a rubber sleeve on the inside this sleeve had been squashed to the effect that one half was actually across the airflow, reducing incoming air by half the other danger is that it could have split, and theres only one way it could go, yes ! straight into the turbo anyway replaced the pipework and guess what ! yes full boost right through the rev range slightly overboosting at 7000 revs what a difference it makes now i am somewhat relieved but also not very happy with the work that was carried out Mark how busy is that dyno of yours ?? Glad you got it sorted Barrie - you must be well relieved. It was supposed to have been professionally installed too wasn't it? Time for Mr Boot to meet Mr Bottom methinks. If it's mapping validation/calibration you want done, there's approx 2 week delay at the moment. Let me know if you need any help Quote Link to comment Share on other sites More sharing options...
Gee Posted May 20, 2006 Report Share Posted May 20, 2006 Get yourself over to www.toyotagtturbo.com Sure I have seen countless posts related to the same problem. BTW, the standard CT9 turbo is not good at holding 1bar of boost, so it will tail off. PS. I have a Glanza V Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 21, 2006 Author Report Share Posted May 21, 2006 Get yourself over to www.toyotagtturbo.com Sure I have seen countless posts related to the same problem. BTW, the standard CT9 turbo is not good at holding 1bar of boost, so it will tail off. PS. I have a Glanza V hi gee ive been a member over there for about 8 months now was posted without any great results hardly a common problem, and certainly not one you would expect after being so-called professionally worked on ! the ct9 is fine for holding 1bar, just not for long time use, which i dont intend to, just want to get the most out of it till it gets upgraded, The best thing is to get it looked at properly - preferably by someone that knows what they are looking at. An FCD won't cause this problem - it has no control over the boost whatsoever. When it's on a dyno you can visibly check the actuator movement, audibly check all of the pneumatic connections for leaks, and conduct an exhaust back pressure test. That's the best way forward Barrie, otherwise much wasted time and pulled out hair will result. i totally agree Mark no FCD being that it was a new HKS actuator, specified for the car, i was reluctant to believe it would be wrong it was mentioned by the mechanic who had just set it up, about the lack of air available ??, i felt this was strange as the smallest part of the incoming flow is the turbo itself thought i would take a look at re-routing the intake to avoid passing over the manifold area and guess what i found ? the intake pipe which was standard is made of metal, on the final connection to the turbo it has a rubber sleeve on the inside this sleeve had been squashed to the effect that one half was actually across the airflow, reducing incoming air by half the other danger is that it could have split, and theres only one way it could go, yes ! straight into the turbo anyway replaced the pipework and guess what ! yes full boost right through the rev range slightly overboosting at 7000 revs what a difference it makes now i am somewhat relieved but also not very happy with the work that was carried out Mark how busy is that dyno of yours ?? Glad you got it sorted Barrie - you must be well relieved. It was supposed to have been professionally installed too wasn't it? Time for Mr Boot to meet Mr Bottom methinks. If it's mapping validation/calibration you want done, there's approx 2 week delay at the moment. Let me know if you need any help will do Mark i have your number Quote Link to comment Share on other sites More sharing options...
Gee Posted May 21, 2006 Report Share Posted May 21, 2006 Nice one. I ve got some goodies to go on myself. Like erm Apexi Power FC, TD04L turbo kit, forged pistons, rods, etc etc Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.