Dyno chart Q
#31
nooo midrange dip at 700whp using 996tt intake.
no midrange dip at my 900whp power level too using 997tt intake. the 6.5k drop in power is my car running out of fuel pump and fuel pressure dropping then pumps catch up and power sarts climbing back.
no midrange dip at my 900whp power level too using 997tt intake. the 6.5k drop in power is my car running out of fuel pump and fuel pressure dropping then pumps catch up and power sarts climbing back.
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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
Last edited by Mark @ AIM Performance; 09-26-2013 at 08:43 AM.
#32
i doubt you did this with a canned tune, and you spent or someone spent alot of time working on that over the years learning how to remove the dip, correct?
#33
I would never run that much power through a "canned" tune on my car, thats silly IMO.
__________________
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |
#34
my point to the post i made is there is a HUGE difference in who tunes your car, and also how much time is spent logging, dynoing etc. and how many mods are on the car play a big role also. if you want a cheap flash, you wont get the same product as one that spends more time and effort into trying to make that tune specific for your car.
case in point i have a turbo dune buggy that has a standalone and i bought it this way, well the tune sucks, its very bad, terrible throttle input response and lean even in closed loop. The person behind the Tune is probably the most important decision to your motors life in the future.
#35
Thanks for the inputs, now this is getting somewhere.
Some speculation: if the reason is not intake manifolds or even the tune, could it be possible that there's some fluid dynamics (=gas flow) issues before the TB or after turbos? Something that causes standing wave at certain frequency (6 cylinders pulsing @ 6000rpm)...what comes to my mind is divided vs. x-flow exhaust...or tubing diameter.
Some speculation: if the reason is not intake manifolds or even the tune, could it be possible that there's some fluid dynamics (=gas flow) issues before the TB or after turbos? Something that causes standing wave at certain frequency (6 cylinders pulsing @ 6000rpm)...what comes to my mind is divided vs. x-flow exhaust...or tubing diameter.
#36
Thanks for the inputs, now this is getting somewhere.
Some speculation: if the reason is not intake manifolds or even the tune, could it be possible that there's some fluid dynamics (=gas flow) issues before the TB or after turbos? Something that causes standing wave at certain frequency (6 cylinders pulsing @ 6000rpm)...what comes to my mind is divided vs. x-flow exhaust...or tubing diameter.
Some speculation: if the reason is not intake manifolds or even the tune, could it be possible that there's some fluid dynamics (=gas flow) issues before the TB or after turbos? Something that causes standing wave at certain frequency (6 cylinders pulsing @ 6000rpm)...what comes to my mind is divided vs. x-flow exhaust...or tubing diameter.
I dont have any data to back it up just observations following these cars and tuning and dyno sheets.
#37
Holy resurrection, Batman!
I had completely forgotten this, but I'm happy that this came up. For I have something to say about my original question myself. Solution to this problem - at least in my case - has mostly been opening up the airflow, secondary the tune. While I still do have 996 turbo's longblock, the airflow in and out has been extensively upgraded:
-997 turbo's air filter box
-do88 silicone tubing to turbos
-997.1 VTG turbos
-do88 largest ICs for 997 turbo and silicone tubing for those
-do88 Y-pipe and plenum
-997 turbo's TB
-997 turbo's intake manifolds
-100 cell cats and 3" exhaust with center outlet
The dyno chart is from last October, 4th gear, 98 oct (Euro) fuel. Crank hp & tq. No dip whatsoever. 1.1 bar boost, external boost controller and tq curve's shape between 3 and 4k is on purpose, to save my rods.
997.1 VTGs, do88 Big Pack, 100 cell cats and 3" exhaust.
I had completely forgotten this, but I'm happy that this came up. For I have something to say about my original question myself. Solution to this problem - at least in my case - has mostly been opening up the airflow, secondary the tune. While I still do have 996 turbo's longblock, the airflow in and out has been extensively upgraded:
-997 turbo's air filter box
-do88 silicone tubing to turbos
-997.1 VTG turbos
-do88 largest ICs for 997 turbo and silicone tubing for those
-do88 Y-pipe and plenum
-997 turbo's TB
-997 turbo's intake manifolds
-100 cell cats and 3" exhaust with center outlet
The dyno chart is from last October, 4th gear, 98 oct (Euro) fuel. Crank hp & tq. No dip whatsoever. 1.1 bar boost, external boost controller and tq curve's shape between 3 and 4k is on purpose, to save my rods.
997.1 VTGs, do88 Big Pack, 100 cell cats and 3" exhaust.
Last edited by pete95zhn; 05-01-2019 at 11:34 AM.
#38
It's time to resurrect this thread again, because John gracefully shared his experiences in the mysteries of VarioCam tuning here: Rennlist thread
So there's a decent explanation for that hp/tq dip at RPM range I was pointing out. It may be either exaggareted or diminshed with parts installed on the engine.
So there's a decent explanation for that hp/tq dip at RPM range I was pointing out. It may be either exaggareted or diminshed with parts installed on the engine.
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