Boost question, yo.
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You running 93oct?
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we get 92 here from the premium pumps, that's what I use.
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Maybe I missed it but I'm not seeing the lean point at 5200-5300, looks like ~0.77-0.79 lambda (columns H&J).
Seems like a pretty normal pump gas flash that would pick up a bit with a splash of race gas
Though I can't comment on the camshaft position dev'sEdit: Is it normal for a K24 car to take 'til 5000rpm to see 1 bar in 3rd gear? ..seems excessively long
Last edited by earl3; Jul 10, 2011 at 10:26 PM.
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Maybe I missed it but I'm not seeing the lean point at 5200-5300, looks like ~0.77-0.79 lambda (columns H&J).
Seems like a pretty normal pump gas flash that would pick up a bit with a splash of race gas Though I can't comment on the camshaft position dev's
Edit: Is it normal for a K24 car to take 'til 5000rpm to see 1 bar in 3rd gear? ..seems excessively long
Seems like a pretty normal pump gas flash that would pick up a bit with a splash of race gas
Though I can't comment on the camshaft position dev'sEdit: Is it normal for a K24 car to take 'til 5000rpm to see 1 bar in 3rd gear? ..seems excessively long
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Surely anything below 0.8 is quite rich (ie 0.77), and anything above 0.8 is running leaner! (lambda x 14.7)
Boost definately seems to build to maximum a bit on the slow side, my EPL tuned X50 with 200 cel cats & Milltek exhaust with a maximum 1bar boost gets to 0.9bar by 3650rpm & its 1bar maximum by 4050rpm.
This is on a UK car running 98RON fuel (93 US equivalent)
Have you done a boost leak check from the turbos?
Boost definately seems to build to maximum a bit on the slow side, my EPL tuned X50 with 200 cel cats & Milltek exhaust with a maximum 1bar boost gets to 0.9bar by 3650rpm & its 1bar maximum by 4050rpm.
This is on a UK car running 98RON fuel (93 US equivalent)
Have you done a boost leak check from the turbos?
OK Guys,My question is....IF you had the right area and space to do a 4th gear data log,safely,,,,,I think that would be better because that is loading the engine more then 3rd,, which should help show the true values because of boosting sooner and higher ??...I would think if you push 3rd gear to the safety limits,that 4th up would put it over the edge in boost and pull timing with the fuel [93oct] being the same..We are not mentioning here anything about temp extremes either....I only say that because I see a difference in boost characteristics between those gears...I am not talking about the guys with EBCs,,only factory controllers ....
.....Thanks
.....Thanks
OK Guys,My question is....IF you had the right area and space to do a 4th gear data log,safely,,,,,I think that would be better because that is loading the engine more then 3rd,, which should help show the true values because of boosting sooner and higher ??...I would think if you push 3rd gear to the safety limits,that 4th up would put it over the edge in boost and pull timing with the fuel [93oct] being the same..We are not mentioning here anything about temp extremes either....I only say that because I see a difference in boost characteristics between those gears...I am not talking about the guys with EBCs,,only factory controllers .........Thanks
.....Thanks
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2001 996TT 3.6L and stock ECU
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
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Surely anything below 0.8 is quite rich (ie 0.77), and anything above 0.8 is running leaner! (lambda x 14.7)
Boost definately seems to build to maximum a bit on the slow side, my EPL tuned X50 with 200 cel cats & Milltek exhaust with a maximum 1bar boost gets to 0.9bar by 3650rpm & its 1bar maximum by 4050rpm.
This is on a UK car running 98RON fuel (93 US equivalent)
Have you done a boost leak check from the turbos?
Boost definately seems to build to maximum a bit on the slow side, my EPL tuned X50 with 200 cel cats & Milltek exhaust with a maximum 1bar boost gets to 0.9bar by 3650rpm & its 1bar maximum by 4050rpm.
This is on a UK car running 98RON fuel (93 US equivalent)
Have you done a boost leak check from the turbos?
OK,,,That is known,,,But how about the data log issue in those different gears??.......Thanks
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Unless I'm going mad I think you have it backwards! Please correct me if I'm wrong.
0.77 x 14.7 = 11.3 (11.3 parts air to 1 part fuel) RICHER
0.83 x 14.7 = 12.2 (12.2 parts air to 1 part fuel) LEANER, as there is more air for that 1 part of fuel.
On boost, I like to see 0.8, which is about 12.0 AFR
0.77 x 14.7 = 11.3 (11.3 parts air to 1 part fuel) RICHER
0.83 x 14.7 = 12.2 (12.2 parts air to 1 part fuel) LEANER, as there is more air for that 1 part of fuel.
On boost, I like to see 0.8, which is about 12.0 AFR
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Unless I'm going mad I think you have it backwards! Please correct me if I'm wrong.
0.77 x 14.7 = 11.3 (11.3 parts air to 1 part fuel) RICHER
0.83 x 14.7 = 12.2 (12.2 parts air to 1 part fuel) LEANER, as there is more air for that 1 part of fuel.
On boost, I like to see 0.8, which is about 12.0 AFR
0.77 x 14.7 = 11.3 (11.3 parts air to 1 part fuel) RICHER
0.83 x 14.7 = 12.2 (12.2 parts air to 1 part fuel) LEANER, as there is more air for that 1 part of fuel.
On boost, I like to see 0.8, which is about 12.0 AFR
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Guess I will start planning my camshaft sensor replacement project, wonder what else I can find an excuse to upgrade while I'm in there...: )
While you are in there, definitely change spark plugs and coilpacks. The newer coilpacks are a 997 part number. Intercoolers will be out so you could upgrade them and maybe install some new boost hoses. Just some ideas to throw out there for you. Good luck with your project. Keep us updated on how things go.