997TT Fuel Pump System Info and Upgrades Thread
#16
To make sure I am following along with the Play At Home™ game correctly -
In order to accommodate the new pumps you are Y-ing the jet pumps together directly to a second Y which feeds the two fuel pumps? Then they are running in parallel? In following the diagram I'm having a hard time figuring out what the fuel flow actually is through the system before/after your modifications.
The diagram doesn't show the bottom connections you have pictured so I'm not 100% sure if I get where everything is going.
In order to accommodate the new pumps you are Y-ing the jet pumps together directly to a second Y which feeds the two fuel pumps? Then they are running in parallel? In following the diagram I'm having a hard time figuring out what the fuel flow actually is through the system before/after your modifications.
The diagram doesn't show the bottom connections you have pictured so I'm not 100% sure if I get where everything is going.
#17
the 996/997 headers are nearly identical
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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 |
#19
If you get a chance to do a pump gas run at 20psi and log your spool in 3rd and/or 4th I'd love to see how it compares with that setup. I've provided some boost logs as well in our thread for comparison. We don't have E85 here at the pumps unfortunately so any comparison on higher octane would be easiest if done with meth or race gas in case you'd like to compare with our data.
#20
A lot of very valuable and hard earned IP in this thread.
Thanks Mark and Dzenno, great stuff. I will be fascinated to see how these 997.1s can do once you hit the hyper car whp levels > 1000
Thanks Mark and Dzenno, great stuff. I will be fascinated to see how these 997.1s can do once you hit the hyper car whp levels > 1000
Last edited by wolfhedge; 11-04-2014 at 03:27 PM.
#21
yep its same as 996 sensor runs out at 22psi of boost too. i heard cobb allows you to use a different MAP sensor to get around this. i believe Cobb, BBI and FVD are doing this for the 997.2s already so it will probably come over to the .1s as well soon. There are 3bar and 4bar sensors availabl from what i hear. 3 bar would be perfect for now for what we are looking to do. i am using FP billet HTA30Rs with external gates
I'm already using 4 bar map sensor with stock ecu since nearly 1 year, but your datalogger must be compatible with it.
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Home of the Worlds quickest Porsches
1/4 mile: 7,95 @ 190 mph
100-200km/h: 2.16 sec
200-300km/h: 3.43 sec
60-130mph: 2.52 sec
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ESMOTOR
Home of the Worlds quickest Porsches
1/4 mile: 7,95 @ 190 mph
100-200km/h: 2.16 sec
200-300km/h: 3.43 sec
60-130mph: 2.52 sec
100-150mph: 2.19 sec
Email: emre@esmotor.com.tr
Web: http://www.esmotor.com.tr
Instagram: http://www.instagram.com/esmotor
#22
If you get a chance to do a pump gas run at 20psi and log your spool in 3rd and/or 4th I'd love to see how it compares with that setup. I've provided some boost logs as well in our thread for comparison. We don't have E85 here at the pumps unfortunately so any comparison on higher octane would be easiest if done with meth or race gas in case you'd like to compare with our data.
That's a good thing. I did not know. There is not too much info about your stuff besides that the cars are lighting quick ! Are you using a sensor that's a plug and play with built in IAT sensor or are you separating the two ?
__________________
#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 |
#23
To make sure I am following along with the Play At Home™ game correctly -
In order to accommodate the new pumps you are Y-ing the jet pumps together directly to a second Y which feeds the two fuel pumps? Then they are running in parallel? In following the diagram I'm having a hard time figuring out what the fuel flow actually is through the system before/after your modifications.
The diagram doesn't show the bottom connections you have pictured so I'm not 100% sure if I get where everything is going.
In order to accommodate the new pumps you are Y-ing the jet pumps together directly to a second Y which feeds the two fuel pumps? Then they are running in parallel? In following the diagram I'm having a hard time figuring out what the fuel flow actually is through the system before/after your modifications.
The diagram doesn't show the bottom connections you have pictured so I'm not 100% sure if I get where everything is going.
the fuel flow thru the system is basically this. when tank is full pump 2 (no jet pump) runs as primary and feeds from basket which is kept full by the gas level being above it. it also runs the low pressure jet out the bottom ( basically for no reason at this stage). when tank level is below the fuel basket, the ECU switches pump 1 ( one with jet) to be the "always on" pump, this pump feeds the passenger side jet (reffered to as high pressure jet) and it also feeds the fuel rail AND the low pressure jet to equalize the level in the tank. because this pump feeds the main jet it flows about 30% less than the second pump which is turned on by the ECU when certain fuel demand is reached in the ECU.
since my new pumps do not have that lower small low pressure outputs I came up with a way to feed them just like 996TT does and Undercover machined up a fitting to do this. basically my idea was to Y off the one pump that ECU runs under 13.7 Gals as Primary, one that has the two outlets on top from the factory. Y off that pump and run both sides jet pumps from that pump and the other side off the Y to the factory Y going to the fuel rail. Pump number 2 will operate just like OEM and not drive any jet pumps, providing full flow when it kicks in. Each of these pumps is rated to 750hp on gas and 450-500whp on E85. Unfortunately when you Y the pumps together its not as simple as X2 the flow its more like x1.5-1.7 or so.
__________________
#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 |
#24
Fuel pump replacement
Hello guys. Hope someone still reads this. I have one of my pumps not working, car runs fine if I take that fuse out but I want to get it properly working again. New dual pump is around $1K. Since you seem to know so much. Is there a less expensive alternative to buying OEM pump for a stock car? I am no expert but was able to take the dual pump canister out and can replace it. Thanks in advance!
#25
Hello guys. Hope someone still reads this. I have one of my pumps not working, car runs fine if I take that fuse out but I want to get it properly working again. New dual pump is around $1K. Since you seem to know so much. Is there a less expensive alternative to buying OEM pump for a stock car? I am no expert but was able to take the dual pump canister out and can replace it. Thanks in advance!
so I think I saw someone 3d print a new can. Much more expensive route I think. The only cheaper thing to do is, remove the can all together and all the hoses. Then just wire up 2 pumps and throw them down into the sumps. Done. It’s pretty simple and doesn’t need to be as complicated as Porsche made it
Last edited by AMGo; 02-04-2024 at 04:01 PM.
#26
holy resurrection!
so I think I saw someone 3d print a new can. Much more expensive route I think. The only cheaper thing to do is, remove the can all together and all the hoses. Then just wire up 2 pumps and throw them down into the sumps. Done. It’s pretty simple and doesn’t need to be as complicated as Porsche made it
so I think I saw someone 3d print a new can. Much more expensive route I think. The only cheaper thing to do is, remove the can all together and all the hoses. Then just wire up 2 pumps and throw them down into the sumps. Done. It’s pretty simple and doesn’t need to be as complicated as Porsche made it
#27
Suncoast may have a reasonable price on the OE pump
They are unavailable through local Porsche dealer
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