worried about my motor
Thread Starter
Joined: Dec 2006
Posts: 978
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From: Glendale (SoCal)
worried about my motor
Thinking that it may be running on one rotor.
I was boosting... nothing crazy, 16psi on Kan's tune, let off the gas, idle dropped to 750 and vacum was around 250
basically the car sounds like a V8 with .600 lift cams.
any ideas on symptoms or anything?
I was boosting... nothing crazy, 16psi on Kan's tune, let off the gas, idle dropped to 750 and vacum was around 250
basically the car sounds like a V8 with .600 lift cams.
any ideas on symptoms or anything?
Joined: Mar 2001
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From: FL-->NJ/NYC again!
-250 on the pfc commander? that's horrendous vacuum, like 10 inches.
You were running 16 psi on 91 octane, no water inj etc?
Do you have a boost gauge? If your idle is constant, does the needle rhythmically tick in vacuum?
You were running 16 psi on 91 octane, no water inj etc?
Do you have a boost gauge? If your idle is constant, does the needle rhythmically tick in vacuum?
Thread Starter
Joined: Dec 2006
Posts: 978
Likes: 1
From: Glendale (SoCal)
Yes 16 on 91.
16 is my "B" setting and "A" is 14. The off setting is 12(wastegate spring). It was tunned by Steve Kan. This was using a AVCR
When everything was normal, the idle was about 1100 and vacuum around 450-500
i made a quick video of startup and number on the AVCR
http://video.google.com/videoplay?do...arch&plindex=0
16 is my "B" setting and "A" is 14. The off setting is 12(wastegate spring). It was tunned by Steve Kan. This was using a AVCR
When everything was normal, the idle was about 1100 and vacuum around 450-500
i made a quick video of startup and number on the AVCR
http://video.google.com/videoplay?do...arch&plindex=0
Will work for horsepower
Joined: Mar 2006
Posts: 1,865
Likes: 1
From: Springfield, MO
It didnt sound like a totally dead rotor to me. But a compression test will tell the tail. What does it sound like reved up a little and does it shake? I hope its something simple good luck!
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damn!
Joined: Mar 2001
Posts: 30,804
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From: FL-->NJ/NYC again!
That's better vacuum (500 at 1100 rpm) then my motor pulls 
Honestly (and there are those who will disagree of course) I think you were running too much boost on pump gas, did Steve tune it to that level knowing you were running 91? He's always tuned on the safe side in my experience.
Honestly (and there are those who will disagree of course) I think you were running too much boost on pump gas, did Steve tune it to that level knowing you were running 91? He's always tuned on the safe side in my experience.
Will work for horsepower
Joined: Mar 2006
Posts: 1,865
Likes: 1
From: Springfield, MO
That's better vacuum (500 at 1100 rpm) then my motor pulls
Honestly (and there are those who will disagree of course) I think you were running too much boost on pump gas, did Steve tune it to that level knowing you were running 91? He's always tuned on the safe side in my experience.
Honestly (and there are those who will disagree of course) I think you were running too much boost on pump gas, did Steve tune it to that level knowing you were running 91? He's always tuned on the safe side in my experience.
Joined: Mar 2001
Posts: 30,804
Likes: 646
From: FL-->NJ/NYC again!
Could be a chipped seal. It would be 'barely' blown, not sure that'll make you feel better.
Just watched the vid, sounds blown to me. Notice how the vacuum value fluctuates rapidly? also, is that a wideband mounted over your steering wheel? do you have any AFR readings from the time surrounding when it blew?
Just watched the vid, sounds blown to me. Notice how the vacuum value fluctuates rapidly? also, is that a wideband mounted over your steering wheel? do you have any AFR readings from the time surrounding when it blew?
Thread Starter
Joined: Dec 2006
Posts: 978
Likes: 1
From: Glendale (SoCal)
Checked the compression... blew a apex seal on the rear rotor.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
Checked the compression... blew a apex seal on the rear rotor.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
It's sad to hear.
It's not the first time I hear that a Steve Kan tuned single turbo engine blow but is it the tuning or a fuel system that didn't work properly...
But don't forget it is not the rotary engine that put you in debt for the next years...
Are you really gonna sell it?? Take your time and think about it
It's not the first time I hear that a Steve Kan tuned single turbo engine blow but is it the tuning or a fuel system that didn't work properly...
But don't forget it is not the rotary engine that put you in debt for the next years...
Are you really gonna sell it?? Take your time and think about it
Joined: Mar 2001
Posts: 30,804
Likes: 646
From: FL-->NJ/NYC again!
Checked the compression... blew a apex seal on the rear rotor.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
And yes, I let Steve know that it was 91... and quite frankly im kind of pissed off because since hes a concervative tuner, I thought I would be safe... but im the second person who blew his motor from that same tune last month.
At this point... Ive dumped every cent Ive had into this car, around 26k, and im only 17. Its getting quite ridiculous. It was a Pettit rebuilt engine too.
Goodbye cruel, cruel rotary world. Ive loved you since the begining, learned about your, read about you, wrote about you, praised you, raved about you, worked on you, rebuilt you, and faught for you.
You've stabbed me in the back and put me in debt for the next 6+years of college.... yet, I know in 20 years, I just might call you back, and we'l see how it goes from there.
You didn't do enough research. Running that boost level on straight 91 octane pump fuel is asking for a blown engine, as you found out the hard way
Also, I don't think you can blame the tuner.....there are many variables as to what could have happened.
Thread Starter
Joined: Dec 2006
Posts: 978
Likes: 1
From: Glendale (SoCal)
Wait no... im not blaming the tuner, I rave about Steve.
Im just disappointed in it all together, I was unsure about the motor anyway.
Should have kept it under 1bar
Currently taking offers on the car. Posted in FS section. I calculated it today and I have over 15k in just parts alone in the car not including labor etc. Just need someone to take it off my hands now.
Im just disappointed in it all together, I was unsure about the motor anyway.
Should have kept it under 1bar
Currently taking offers on the car. Posted in FS section. I calculated it today and I have over 15k in just parts alone in the car not including labor etc. Just need someone to take it off my hands now.
Rotary Freak
Joined: Feb 2001
Posts: 1,926
Likes: 0
From: fort worth, tx, usa
that's weird... If I remembered correctly, you were the one that had the turbo compressor wheel nut came off during the tune? I recalled tuning your car to around 10.5-10.7 a/f to give a little margin for the turbo eff difference. Did you get a new tank of gas when the car blew?
Wait no... im not blaming the tuner, I rave about Steve.
Im just disappointed in it all together, I was unsure about the motor anyway.
Should have kept it under 1bar
Currently taking offers on the car. Posted in FS section. I calculated it today and I have over 15k in just parts alone in the car not including labor etc. Just need someone to take it off my hands now.
Im just disappointed in it all together, I was unsure about the motor anyway.
Should have kept it under 1bar
Currently taking offers on the car. Posted in FS section. I calculated it today and I have over 15k in just parts alone in the car not including labor etc. Just need someone to take it off my hands now.
Thread Starter
Joined: Dec 2006
Posts: 978
Likes: 1
From: Glendale (SoCal)
Well... the turbo, turned out to be Garrett's fault and they replaced it for free. The nut was threaded the opposite way the turbine spinned which cause it to come loose.
Yes, it was a new tank of gas. 91, highest we get here.
I was on the "B" setting, 2nd pull up to 6.5k and when i let off, vacuum went to **** and idle dropped to 750rpm.
After the tune, it was running really lean up to 3k, around 14.68, before it was around 12.2.
I think it leaned out.
Yes, it was a new tank of gas. 91, highest we get here.
I was on the "B" setting, 2nd pull up to 6.5k and when i let off, vacuum went to **** and idle dropped to 750rpm.
After the tune, it was running really lean up to 3k, around 14.68, before it was around 12.2.
I think it leaned out.
Will work for horsepower
Joined: Mar 2006
Posts: 1,865
Likes: 1
From: Springfield, MO
That has nothing to do with the afrs at 6500 rpms they change as the tune changes, boost level and so on! I wouldnt think 14.6 would be of at 3000. rpms. But im sure Steve can explain better.
Rotary Freak
Joined: Feb 2001
Posts: 1,926
Likes: 0
From: fort worth, tx, usa
at 3k rpm, your crusing a/f ratio should be in the high 14's to low 15's. This is the area where I lean it out to give the best fuel economy for cruising. Once you are at boost, it will richen up as the psi started to build.
Did you say that it was a brand new tank of gas when the engine let go? I have seen many times where the gas station accidently put in 87 octane to replace preimum gas (happens to me at least 4 times) and causes the engine to detonate. I usually don't even get on it if the car was spuddering on a tank of gas (which is usually an indication of bad gas).
From my experience, 87 octane is only good for 10psi (at most) w/o breaking the engine. Anything more will detonate the engine due to its fast burning properties.
Did you say that it was a brand new tank of gas when the engine let go? I have seen many times where the gas station accidently put in 87 octane to replace preimum gas (happens to me at least 4 times) and causes the engine to detonate. I usually don't even get on it if the car was spuddering on a tank of gas (which is usually an indication of bad gas).
From my experience, 87 octane is only good for 10psi (at most) w/o breaking the engine. Anything more will detonate the engine due to its fast burning properties.
Well... the turbo, turned out to be Garrett's fault and they replaced it for free. The nut was threaded the opposite way the turbine spinned which cause it to come loose.
Yes, it was a new tank of gas. 91, highest we get here.
I was on the "B" setting, 2nd pull up to 6.5k and when i let off, vacuum went to **** and idle dropped to 750rpm.
After the tune, it was running really lean up to 3k, around 14.68, before it was around 12.2.
I think it leaned out.
Yes, it was a new tank of gas. 91, highest we get here.
I was on the "B" setting, 2nd pull up to 6.5k and when i let off, vacuum went to **** and idle dropped to 750rpm.
After the tune, it was running really lean up to 3k, around 14.68, before it was around 12.2.
I think it leaned out.
at 3k rpm, your crusing a/f ratio should be in the high 14's to low 15's. This is the area where I lean it out to give the best fuel economy for cruising. Once you are at boost, it will richen up as the psi started to build.
Did you say that it was a brand new tank of gas when the engine let go? I have seen many times where the gas station accidently put in 87 octane to replace preimum gas (happens to me at least 4 times) and causes the engine to detonate. I usually don't even get on it if the car was spuddering on a tank of gas (which is usually an indication of bad gas).
From my experience, 87 octane is only good for 10psi (at most) w/o breaking the engine. Anything more will detonate the engine due to its fast burning properties.
Did you say that it was a brand new tank of gas when the engine let go? I have seen many times where the gas station accidently put in 87 octane to replace preimum gas (happens to me at least 4 times) and causes the engine to detonate. I usually don't even get on it if the car was spuddering on a tank of gas (which is usually an indication of bad gas).
From my experience, 87 octane is only good for 10psi (at most) w/o breaking the engine. Anything more will detonate the engine due to its fast burning properties.
damn man all u guys have me shitting bricks now!...i have the same kind of idle and shaking!....although i did a compression check( during the unflooding procedure)...the compression was 84 on the back rotor and 87 in the front. im guessing it was low cuz of the flooding! oh and the car is still pretty fast...which im guessing shudnt be if i were on one rotor?