I have started to raise the boost level on my 1996 200sx GA16de turbo from about 9 psi to 12 psi. And in doing so, I have started haveing hesitation at an rpm range between 4500 and 6000 rpm. It is the worst at 5500 rpm under WOT. After 6000 rpm, the hesitation stops. This hesitation feels a lot like hitting the rev limiter. I recently put a A/F meter on the car and verified that it is not the A/F ration (runs slightly rich under WOT at that rpm). I also check ignition and that doesn't seem to be a problem. With the turbo clutch and lightened flywheel from JWT, I don't think the clutch is a problem. Could my transmission be slipping? I've seen from others dyno graphs that the max power from the turbo is around the 5500 rpm range, so could my transmission be affected by the higher power levels? Any help / info would be appreciated.
__________________
The most endangered speicies is the person who retains his freedom of choice.
I have started to raise the boost level on my 1996 200sx GA16de turbo from about 9 psi to 12 psi. And in doing so, I have started haveing hesitation at an rpm range between 4500 and 6000 rpm. It is the worst at 5500 rpm under WOT. After 6000 rpm, the hesitation stops. This hesitation feels a lot like hitting the rev limiter. I recently put a A/F meter on the car and verified that it is not the A/F ration (runs slightly rich under WOT at that rpm). I also check ignition and that doesn't seem to be a problem. With the turbo clutch and lightened flywheel from JWT, I don't think the clutch is a problem. Could my transmission be slipping? I've seen from others dyno graphs that the max power from the turbo is around the 5500 rpm range, so could my transmission be affected by the higher power levels? Any help / info would be appreciated.
I am using the JWT high pressure clutch (their new clutch they recommend for the HotShot Turbo Application). I think it is a dual diaphram pressure plate and I have a metal / organic friction disk.
__________________
The most endangered speicies is the person who retains his freedom of choice.
Hmm that is strange. I have the same setup and ran 12psi yesterday... outside of the pinging I noticed no hesitation.
The only thing I have noticed is what I guess would be called chatter... when I put the car into a higher gear and its not fast enough yet to be in that gear... I floor it and I get this little shaking for a second then goes away....
I have felt that as well. I have also seen that once and a while when I downshift and the rpm's rise to around 4500 rpm, then I get a little bit of a "slipping" feeling. It only happens once and a while though.
Another thing I have noticed, it seems to be getting harder and harder to get into first gear after stopping. Don't know why exactly, but it sounds like my syncros might be going out. If that's possible...
__________________
The most endangered speicies is the person who retains his freedom of choice.
Yeah I have that too... sometimes I can't tell if its in first and I take it out and have to hit the clutch again.
I noticed the same thing on downshifts rpm shoots up and you get a bit of that little shudder in there and then it grabs again... I looked at the boost gauge and it seemed to match the shudder, if you can picture what I'm saying... like when it shudders the boost doesn't build during that time...
Well for your problem, can you check the ecu to see if your throwing a code?
You know I'm beginning to think this clutch isn't the crackshot highspeed clutch it was designed to be... This morning, I'm cruising down to a light so I have the clutch depressed and cruising into the light in 4th... the light changes all of a sudden and I gas it, no speed, some of that shuddering we were talking about before... so I decide to downshift to 3rd... I gas it... almost felt as if it was in 4th still! It felt like it was slipping!
I agree, the clutch might be the root of all of the problems. I hate to think that since it was so expensive. I wonder if Mike Y. or Wes is have any of these problems? Do you know of any other clutch options we have?
__________________
The most endangered speicies is the person who retains his freedom of choice.
When Javier had his car done he was using an ACT setup I believe... I wonder if JWT will do anything about this, I believe the guarantee their clutch to withhold these power levels... Wes is using a JWT clutch but he is using the single diaphram pp I believe.
Thanks for the info James. I hope Wes is having better luck with his clutch then we seem to be having. If you hear of anyone else who is having problems, we will need to get together and address these issues with JWT. I hate to buy defective parts, if that is indeed the case.
__________________
The most endangered speicies is the person who retains his freedom of choice.
Thanks for the info James. I hope Wes is having better luck with his clutch then we seem to be having. If you hear of anyone else who is having problems, we will need to get together and address these issues with JWT. I hate to buy defective parts, if that is indeed the case.
Well my tranny took a dump on me yesterday so I won't be able to look into it for a bit... Its stuck in 1st gear.
I think if you still feel any slipping you should call JWT because then they can work on a new design and maybe even replace your clutch with the new design since they claimed it would hold this power.
Linear Mode
