Will Dyno My GT35/40 in 2 weeks. Wanna take a stab at what numbers to expect?
12-11-04, 07:23 AM
#30
Eats, Sleeps, Dreams Rotary
Thread Starter
Ok, So it's scheduled for 1 today....What other numbers would you guys like to see besides the dyno with AFR?
Ambient Tepm
Intake Temp
EGT
Injector Duty Cycle
??
Ambient Tepm
Intake Temp
EGT
Injector Duty Cycle
??
12-11-04, 08:02 AM
#32
Eats, Sleeps, Dreams Rotary
Thread Starter
Originally Posted by rusty's_silver_bullet-7
All of the above... boost - of course - and what type of gas.
I decided I am just going to do the pulls with 93 and watch the AFR. I doubt I will go get racegas to piddle around town so may as well get the numbers on what fuel I will run normally.
12-11-04, 04:00 PM
#33
Eats, Sleeps, Dreams Rotary
Thread Starter
Little on the rich side....But i'm still alive.
So anyway,
Here goes.
93 Octane
Ambient Temp: 53F
Did 3 runs...
Run 1 (not graphed)
Comments: Had some huge amount of smoke coming out the exhaust and around the compressor housing after the pull...Then it just burned off afer about 10 seconds...So there's an oil leak somewhere...I thought maybe it was the oil line sitting on top that was leaking before...But I sealed it and no oil there...Kinda looks like where the compressor housing connects in the rear...Right around the center....Don't know what you call that..
Run 1 Boost Gauge Video
Run 1 EGT Video
Run 2
PSI: 13
Water Temp: 84c
IDC: 77%
Intake Temp: 24C
Knock: 19
Comments: Same **** again with the smoke...Not as bad as the first time but still smoked.
Run 2 Boost Gauge Video
Run 2 EGT Video
Run 3
PSI: 16
Water Temp: 80c
IDC: 88%
Intake Temp: 21C
Knock: 23
Comments: Same **** again with the smoke...Not as bad as the second time and smoked from the turbo burned off almost instantly. But it still ******* smoked! I think I am going to pick up the HKS Twin Power and go for a retune. 400 is the goal..Once I hit that I am happy..
Run 3 Boost Gauge Video
Run 3 EGT Video
So Questions
1. What could be causing this oil leak?
2. I noticed my boost fluctuate slightly...what's yours like?....Take a look at the videos and tell me if this is bad or what the deal is.
Here goes.
93 Octane
Ambient Temp: 53F
Did 3 runs...
Run 1 (not graphed)
Comments: Had some huge amount of smoke coming out the exhaust and around the compressor housing after the pull...Then it just burned off afer about 10 seconds...So there's an oil leak somewhere...I thought maybe it was the oil line sitting on top that was leaking before...But I sealed it and no oil there...Kinda looks like where the compressor housing connects in the rear...Right around the center....Don't know what you call that..
Run 1 Boost Gauge Video
Run 1 EGT Video
Run 2
PSI: 13
Water Temp: 84c
IDC: 77%
Intake Temp: 24C
Knock: 19
Comments: Same **** again with the smoke...Not as bad as the first time but still smoked.
Run 2 Boost Gauge Video
Run 2 EGT Video
Run 3
PSI: 16
Water Temp: 80c
IDC: 88%
Intake Temp: 21C
Knock: 23
Comments: Same **** again with the smoke...Not as bad as the second time and smoked from the turbo burned off almost instantly. But it still ******* smoked! I think I am going to pick up the HKS Twin Power and go for a retune. 400 is the goal..Once I hit that I am happy..
Run 3 Boost Gauge Video
Run 3 EGT Video
So Questions
1. What could be causing this oil leak?
2. I noticed my boost fluctuate slightly...what's yours like?....Take a look at the videos and tell me if this is bad or what the deal is.
Last edited by apneablue; 12-11-04 at 04:25 PM.
12-11-04, 04:28 PM
#35
Mad Man
When you go WOT, Oil pressure tends to peak, and then settle down, a little better venting may well solve your problem. This is assuming a -10, or a -12 return with no or very slight bends, if you are not straight out of the turbo, that could be it. With those AFRs, and that knock, why not crank it up to at least 20 psi? What gas were you using? Looks like mid 400s S/B no problem. What is your complete ignition consist of? The twin power is a mediocre solution generrally speaking. 3 MSD6A, with the right plugs, and wires should do it. At the boost you are running the ignition is not that much of a problem, past ~20 psi, you really will see a huge benefit. I'd say, looks good, iron out the bugs, and try 20, and 25 psi on race gas. AFRs look just right, although you could be a little leaner even though that rich spot is peak torque. What sort of timing? Good job,Carl
12-11-04, 04:43 PM
#37
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ya, the car was tuned just a little rich since most areas of Oklahoma has 91 octane. I think 400rwhp is possible with the tune leaner to 11.0:1. a/f looks pretty flat from what I can tell, not bad for street tune 
Originally Posted by cewrx7r1
You might be missfiring from running so rich. The AFRs are between 10 and 10.5 from 4700rpm and up.
12-11-04, 04:48 PM
#38
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Originally Posted by pluto
ya, the car was tuned just a little rich since most areas of Oklahoma has 91 octane. I think 400rwhp is possible with the tune leaner to 11.0:1. a/f looks pretty flat from what I can tell, not bad for street tune
Imma see what guitarjunkie locked my afr's in at. Conservative I know, but what is the best for 91 octane? (t78)
12-11-04, 04:49 PM
#39
Eats, Sleeps, Dreams Rotary
Thread Starter
Originally Posted by Carl Byck
When you go WOT, Oil pressure tends to peak, and then settle down, a little better venting may well solve your problem. This is assuming a -10, or a -12 return with no or very slight bends, if you are not straight out of the turbo, that could be it. With those AFRs, and that knock, why not crank it up to at least 20 psi? What gas were you using? Looks like mid 400s S/B no problem. What is your complete ignition consist of? The twin power is a mediocre solution generrally speaking. 3 MSD6A, with the right plugs, and wires should do it. At the boost you are running the ignition is not that much of a problem, past ~20 psi, you really will see a huge benefit. I'd say, looks good, iron out the bugs, and try 20, and 25 psi on race gas. AFRs look just right, although you could be a little leaner even though that rich spot is peak torque. What sort of timing? Good job,Carl
I'm running 2 greddy race plugs in the leadingg and new NgK wires.
Why I didn't crank it up? we were having ignition breakup at high RPM during tuning past 16psi...Just didn't want past that till I got some ignition amp.
12-11-04, 04:50 PM
#40
Rebreaking things
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I don't blame you, but keep in mind you can reduce break up by leaning out the afrs a bit. How much advance are you running at 15psi around the torque peak?
12-11-04, 04:54 PM
#41
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16 degrees advance timing with 14 degrees split....
Looks like the EGT is pretty cold, it can definately lean out a bit for sure.
Looks like the EGT is pretty cold, it can definately lean out a bit for sure.
Originally Posted by CCarlisi
I don't blame you, but keep in mind you can reduce break up by leaning out the afrs a bit. How much advance are you running at 15psi around the torque peak?
12-11-04, 06:40 PM
#43
Eats, Sleeps, Dreams Rotary
Thread Starter
Ok, help explain this to a dumb ***....Why on run 3 which is the higher HP higher boost run the EGT is cooler than the lower HP run at 13psi?
The 13psi run is 1250 and 16psi almost hist 1200...
Is it because of the tune and it's actually richer up top for the 16psi run?
The 13psi run is 1250 and 16psi almost hist 1200...
Is it because of the tune and it's actually richer up top for the 16psi run?
12-12-04, 01:17 AM
#44
You gained 50rwhp from 13psi to 16psi? I would tune a litte leaner if it was mine...do you have the numerical pages as opposed to the graphs? On the graph when it bottoms out a 10:1, you don't know how rich you really are going...where as the numerical sheets would still register...but regardless, I would go for 10.5:1 up to 11.5:1 throughout the power band. I did on my 60-1 and it came out very clean...no breakup, smooth graphs, etc...I would guess your fuel situation is causing the roughness on your graph. My tune was at 12-13psi....I am now running 16psi, so I would be curious to know if that is the normal expected power increase with boost levels.
How do you like the way she feels on the street? dyno numbers really don't mean ****....but it's fun to know.
How do you like the way she feels on the street? dyno numbers really don't mean ****....but it's fun to know.
12-12-04, 10:43 AM
#45
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Originally Posted by pluto
Race gas generally has heavier specific weight than pump gas. When you have a higher density fuel atomized with air, your a/f ratio will richen up and lower your hp rating using the same map. That's why you always wanted to tune with the fuel you normally run. Also, like you mentioned, higher octane rating is more stable because it burns slower than pump gas so the potential hp will also decrease due to slower burning process. Generally speaking, for NA cars, you want to run as low of an octane as possible for maximum hp but will also risk a chance of knocking. If you ask any SCCA ITA/spec rx7 racers, they always run 87 octane instead of 91 or 93 because the car runs faster with lower octane.
12-12-04, 12:09 PM
#46
Eats, Sleeps, Dreams Rotary
Thread Starter
Originally Posted by lane_change
You gained 50rwhp from 13psi to 16psi? I would tune a litte leaner if it was mine...do you have the numerical pages as opposed to the graphs? On the graph when it bottoms out a 10:1, you don't know how rich you really are going...where as the numerical sheets would still register...but regardless, I would go for 10.5:1 up to 11.5:1 throughout the power band. I did on my 60-1 and it came out very clean...no breakup, smooth graphs, etc...I would guess your fuel situation is causing the roughness on your graph. My tune was at 12-13psi....I am now running 16psi, so I would be curious to know if that is the normal expected power increase with boost levels.
How do you like the way she feels on the street? dyno numbers really don't mean ****....but it's fun to know.
How do you like the way she feels on the street? dyno numbers really don't mean ****....but it's fun to know.
I will go see Steve at the begining of the year with a new trailing coil and hks tp and tune to 17. Maybe with a little leaner I will crack 400...
As for on the street. It's pretty amazing actually....Nice power delivery and holds steady and strong till redline...Personally I thought the spool would be a little quicker for this turbo...I get 10psi by about 3800rpm and then by about 4600 full 16psi...Maybe the older style manifold. Don't know.
Anyway, if anyone sees the boost gauge vids...Can you tell me what could be causing the flutter of the needle..It seems to fluctuate and bounce a little..
Does anyone elses do that?
12-12-04, 08:02 PM
#50
Originally Posted by apneablue
and why am I so lumpy up top? I didn't have any ignition breakup and plugs are new.
EDIT: I'm lumpy everywhere!
EDIT: I'm lumpy everywhere!