WTF! Car wont make boost on dyno..
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From: Colorado Springs
WTF! Car wont make boost on dyno.. now that my fuel situation is solved.
the car will not make more that 13psi on the dyno.
eboost setting was maxed 99
gate pressure 5.5psi and changed to 10psi - nothing changed on dyno
overboost was set to 20psi
I know I dont have any leaks of any sort.
on the streets the car runs fine..makes the requested boost...I can dial it up and down.
eboost settings
39 == 12.4psi <-- this setting on the dyno only netted 11.1 psi
50 == 14.5psi
60 == 15psi
tti race kit
t80 .96
366 cubes
21x/22x 563/563 116 cam
stage 3 heads
8:8 comp
17 degrees timing...no knock.
a/f ratio was good 11.5 - 12
3" dp to 3.5" exhaust all the way back - no cats
innovative wastegate 8psi spring...cranked down all the way
godzilla bov - utilizing both ports.. vacuum and boost to seal it shut
i have hal shocks in the rear and they are set pretty stiff, i wouldnt think that would effect anything?
any ideas?
measily 13psi == 742hp/786tq
575hp/610tq at my altitude
the car will not make more that 13psi on the dyno.
eboost setting was maxed 99
gate pressure 5.5psi and changed to 10psi - nothing changed on dyno
overboost was set to 20psi
I know I dont have any leaks of any sort.
on the streets the car runs fine..makes the requested boost...I can dial it up and down.
eboost settings
39 == 12.4psi <-- this setting on the dyno only netted 11.1 psi
50 == 14.5psi
60 == 15psi
tti race kit
t80 .96
366 cubes
21x/22x 563/563 116 cam
stage 3 heads
8:8 comp
17 degrees timing...no knock.
a/f ratio was good 11.5 - 12
3" dp to 3.5" exhaust all the way back - no cats
innovative wastegate 8psi spring...cranked down all the way
godzilla bov - utilizing both ports.. vacuum and boost to seal it shut
i have hal shocks in the rear and they are set pretty stiff, i wouldnt think that would effect anything?
any ideas?
measily 13psi == 742hp/786tq
575hp/610tq at my altitude
Last edited by MECHAM; Aug 31, 2006 at 10:52 PM.
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From: Colorado Springs
Originally Posted by iamsickofitall
what type of dyno was it on? might not have been putting enough of a load on the motor.
mightmouse has the exact kit...or did he changed turbo. but he dynoed on a regular dyno jet and got 900+hp...
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9 Second Club
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From: Lake Orion, MI
That's why I use the freeway. 
Dynojets can strugle to maintain the load on a turbo car at times which is why you may see it react differently for a given boost controller setting. A variance of a 1-1.5psi is probably reasonable.
Does it maintain the same boost level for the whole pull? Or are you seeing it spike to that lower boost level and then back down from there? Does eboost have a boost graph/history/playback display so that you can look at what boost was for the full pass?
Are you running a cutout of any kind? That'll put some pep back in as it's worth about 1-1.5psi for me when I open the electric dump on the street.
What fuel were you running? Was that 17 degress peak timing or timing at peek torque?
Rick
Dynojets can strugle to maintain the load on a turbo car at times which is why you may see it react differently for a given boost controller setting. A variance of a 1-1.5psi is probably reasonable.
Does it maintain the same boost level for the whole pull? Or are you seeing it spike to that lower boost level and then back down from there? Does eboost have a boost graph/history/playback display so that you can look at what boost was for the full pass?
Are you running a cutout of any kind? That'll put some pep back in as it's worth about 1-1.5psi for me when I open the electric dump on the street.
What fuel were you running? Was that 17 degress peak timing or timing at peek torque?
Rick
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From: Colorado Springs
Originally Posted by 2001-WS6
Does it maintain the same boost level for the whole pull?
Originally Posted by 2001-WS6
Does eboost have a boost graph/history/playback display so that you can look at what boost was for the full pass?
Originally Posted by 2001-WS6
Are you running a cutout of any kind?
Originally Posted by 2001-WS6
What fuel were you running? Was that 17 degress peak timing or timing at peek torque?
i didnt save any scan info from the dyno as I was too pissed.
but this is what a quick 15psi looked like on the streets right after I left they dyno and change to setting 3.
http://flowerstechnology.net/Documents/15psi.xls
thats third gear...dont pay attention to the mph...i keep forget to change it from kmh
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From: Lake Orion, MI
The file looks good.
We get 94 Sunoco at the pump here which is nice. That's the only thing I've been running so far this year.
I made about the same 3,000-5,800rpm pass on Wednesday night in 3rd gear out on I-75 at 14.4psi. Similar timing, but I had a bit cooler IATs with the ambient down around 75 degrees.
The Big diference between our passes would be my 28" DRs and a TH-400 put me at about 112mph to your 90mph at 5,400rpm. So I topped out at 126mph about 10 frames later on my clossed ciruit testing loop.
Rick
We get 94 Sunoco at the pump here which is nice. That's the only thing I've been running so far this year.
I made about the same 3,000-5,800rpm pass on Wednesday night in 3rd gear out on I-75 at 14.4psi. Similar timing, but I had a bit cooler IATs with the ambient down around 75 degrees.
The Big diference between our passes would be my 28" DRs and a TH-400 put me at about 112mph to your 90mph at 5,400rpm. So I topped out at 126mph about 10 frames later on my clossed ciruit testing loop.
Rick
what rpm did you start the dyno at? i start low as possible to get the turbo going, mine does take longer to come in in a dynojet vs. street too.
i am surprised it wasnt creeping the whole pull, you said it came up and then settled back down.. hmm
if your exhaust is restrictive it can limit how much boost you can make.. but wouldnt say why the e boost isnt reacting.
did you toggle through the set points on the way home and all of them worked correctly again?
maybe have to do a larger gate spring, or try the other connection method they show in the instructions.
can you hear the gate opening? like its just not giving the exhaust to the turbo or is it quiet like its all going in the turbo and just not making the steam?
years back i ran my 346" on the dynojet with the gt-80 here and on georges and it seem'd to come on line very well actually.
i am surprised it wasnt creeping the whole pull, you said it came up and then settled back down.. hmm
if your exhaust is restrictive it can limit how much boost you can make.. but wouldnt say why the e boost isnt reacting.
did you toggle through the set points on the way home and all of them worked correctly again?
maybe have to do a larger gate spring, or try the other connection method they show in the instructions.
can you hear the gate opening? like its just not giving the exhaust to the turbo or is it quiet like its all going in the turbo and just not making the steam?
years back i ran my 346" on the dynojet with the gt-80 here and on georges and it seem'd to come on line very well actually.
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From: Colorado Springs
Originally Posted by MIGHTYMOUSE
what rpm did you start the dyno at?
Originally Posted by MIGHTYMOUSE
i am surprised it wasnt creeping the whole pull, you said it came up and then settled back down.. hmm
Originally Posted by MIGHTYMOUSE
if your exhaust is restrictive it can limit how much boost you can make.. but wouldnt say why the e boost isnt reacting.
Originally Posted by MIGHTYMOUSE
did you toggle through the set points on the way home and all of them worked correctly again?
Originally Posted by MIGHTYMOUSE
can you hear the gate opening? like its just not giving the exhaust to the turbo or is it quiet like its all going in the turbo and just not making the steam?
I think my next plan of action is to get to the track and see if those other boost settings are indeed going to show up in my MPH.
my 15psi tune doesnt look too bad on A/F...hard to street tune. might try the new load dyno here too...
Last edited by MECHAM; Sep 1, 2006 at 12:24 PM.
Originally Posted by MECHAM
check hoses..and intake leaks would show on the boost controller..as I am always -13 at idle
This is a common problem in the DSM community. Many people will have normal vacuum readings but leaks at high boost levels. We always recommend that someone do it because it doesn't take long and that is one piece of the puzzle that is solved.
Earnest..
Other options.. Intake air filter, maybe dirty to the T80 is holding back airflow..
do you have a Air/Fuel graph to display. Curious how she looks..
Keep me posted, as I want to keep helping you..
How was the tuning on the dyno. Did it come pretty easy for you?
Clint
Other options.. Intake air filter, maybe dirty to the T80 is holding back airflow..
do you have a Air/Fuel graph to display. Curious how she looks..
Keep me posted, as I want to keep helping you..
How was the tuning on the dyno. Did it come pretty easy for you?
Clint
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From: Lake Orion, MI
The Filter really couldn't get that dirty where it is located for us.
The A/F charting would be in his HP Tuner logs from the pull. In looking at his 15psi street pull attached to the pull in post #9 above, I'm guessing most of his run on the 15psi pull on the dyno was hanging at 11.6-11.8 range for the full pull.
He's leaning out a little on the road but not bad. It will need some more fuel at the track though. So be prepared to get out of the pass head back to the pits to add some more fuel to the tune.
Rick
The A/F charting would be in his HP Tuner logs from the pull. In looking at his 15psi street pull attached to the pull in post #9 above, I'm guessing most of his run on the 15psi pull on the dyno was hanging at 11.6-11.8 range for the full pull.
He's leaning out a little on the road but not bad. It will need some more fuel at the track though. So be prepared to get out of the pass head back to the pits to add some more fuel to the tune.
Rick