2001 porsche 996 ls1 conversion
Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
LOOOOOL, i'm actually 5'7" 
and thanks to all of you for all the nice words
i read that article and man was i happy and proud
he also quoted me ,,,, i feel important now
its funny how the author thinks that changing the plugs is hard ; its so esy even a caveman can do it
any how , i got some stuff done recently ( not as much as i was hoping but atleast its something off the list )
i got the fuel rail brackets done and the rails mounted , all i have to do now is bolt up the intake and hook up the fuel line, but this will wait a bit till i finish fooling around with the harness ( given how the harness is placed in the compartment i had to extend the MAP, crank , and ground wires).
i also ( finally) finished the throttle cable deal , routing 13 feet of throttle cable can be a pain
the cable goes from the throttle body through the gromet in the engine compartment where the harness goes through , then snakes its way next to the pcm , and then under the rear seat area then turns towards the center console where it goes forward to the attatchment point right under the dash . positioning the cable turned out to be crutial cause due to the added length , more places where pressing on the cable wich made pushing the throttle pedal hard if not imposible . so after spraying th inside of the cable with lube and moving it around to get bends as wide as possible i finally came up with the location of the cable as described above .
as for mounting the cable to the pedal , i just hooked it to the top and side of the pedal
here is how the able attaches to the pedal ( as well as more thumb **** for jimbo ):
and this s how the cable looks in place and attatched to the pedal :
and how it looks with everything in place , you can't even see/feel the cable when you're in the car
moving on , i took the fuel sending unit out ( well i tried to ) to inspect suff ; well it smells funny , and al the hoses seem intact as well as the wires, i was afraid that te stuff might be deteriorated from sitting that long , but nope ( i guess we have different additives in our gas , it doesn't go bad as quick as it does in the states )
also dropped te battery in place and hooked it up so i can verify some wires.
note : F-body owners ,,,, eat your heart out ! took me 2 minutes to get to the fuel pump
i was pleasantly surprised with a whole slew of warning lights and messages on the information center it came to life!!!
the bad news is that i could not find a ignition hot wire in the relay box at the rear ( next to the pcm and DME , i did find a constant hot but i'm not sure if it is constant through cranking .
another bummer was that i couldn't get a starter signal , i don't know if this is because there is a switch that has to be triggered in line to have it work or what, but ill chip away at it till i get it finished
in a dumb move ( as with many others i made ) i mounted the pump on the gine , and now i had to remove it so i can get a pressure hose made for it ( weird fitting) , i'll be doing that today and hopefuly have it all finished and scratched off the list .
so , next up :
- finish runnung the wires in the engine compartment
- finish hooking up the engine harness
- figure out the wiring inside the car ( starter signal , switched source , etc.)
- install the center console
- install the steering coulm stuff when it shows up
- driver door stuff
- maybe push this thing on the lift again so i can do some stuff under the car
and thanks to all of you for all the nice words
i read that article and man was i happy and proud
he also quoted me ,,,, i feel important now its funny how the author thinks that changing the plugs is hard ; its so esy even a caveman can do it
any how , i got some stuff done recently ( not as much as i was hoping but atleast its something off the list
)i got the fuel rail brackets done and the rails mounted , all i have to do now is bolt up the intake and hook up the fuel line, but this will wait a bit till i finish fooling around with the harness ( given how the harness is placed in the compartment i had to extend the MAP, crank , and ground wires).
i also ( finally) finished the throttle cable deal , routing 13 feet of throttle cable can be a pain
the cable goes from the throttle body through the gromet in the engine compartment where the harness goes through , then snakes its way next to the pcm , and then under the rear seat area then turns towards the center console where it goes forward to the attatchment point right under the dash . positioning the cable turned out to be crutial cause due to the added length , more places where pressing on the cable wich made pushing the throttle pedal hard if not imposible . so after spraying th inside of the cable with lube and moving it around to get bends as wide as possible i finally came up with the location of the cable as described above .
as for mounting the cable to the pedal , i just hooked it to the top and side of the pedal
here is how the able attaches to the pedal ( as well as more thumb **** for jimbo
):and this s how the cable looks in place and attatched to the pedal :
and how it looks with everything in place , you can't even see/feel the cable when you're in the car
moving on , i took the fuel sending unit out ( well i tried to
) to inspect suff ; well it smells funny , and al the hoses seem intact as well as the wires, i was afraid that te stuff might be deteriorated from sitting that long , but nope ( i guess we have different additives in our gas , it doesn't go bad as quick as it does in the states )also dropped te battery in place and hooked it up so i can verify some wires.
note : F-body owners ,,,, eat your heart out ! took me 2 minutes to get to the fuel pump
i was pleasantly surprised with a whole slew of warning lights and messages on the information center
it came to life!!!the bad news is that i could not find a ignition hot wire in the relay box at the rear ( next to the pcm and DME , i did find a constant hot but i'm not sure if it is constant through cranking .
another bummer was that i couldn't get a starter signal , i don't know if this is because there is a switch that has to be triggered in line to have it work or what, but ill chip away at it till i get it finished
in a dumb move ( as with many others i made
) i mounted the pump on the gine , and now i had to remove it so i can get a pressure hose made for it ( weird fitting) , i'll be doing that today and hopefuly have it all finished and scratched off the list .so , next up :
- finish runnung the wires in the engine compartment
- finish hooking up the engine harness
- figure out the wiring inside the car ( starter signal , switched source , etc.)
- install the center console
- install the steering coulm stuff when it shows up
- driver door stuff
- maybe push this thing on the lift again so i can do some stuff under the car
Wow, the fuel tank setup is totally different on your car. The sending unit etc is under the battery in mine. Were the wires trashed on yours?
There's a switch on the clutch that enables the starter. The two yellow wires in the rear harness is what I used to run to the solenoid. If you don't have the switch you may need to make the car think it's park since it was a tiptronic - more fun wiring mysteries
There's a small blue wire in the rear engine harness that works perfect for the LS ignition relay. This is what I used.
There's a switch on the clutch that enables the starter. The two yellow wires in the rear harness is what I used to run to the solenoid. If you don't have the switch you may need to make the car think it's park since it was a tiptronic - more fun wiring mysteries
There's a small blue wire in the rear engine harness that works perfect for the LS ignition relay. This is what I used.
Staging Lane
Joined: Sep 2007
Posts: 61
Likes: 2
LOOOOOL, i'm actually 5'7"
and thanks to all of you for all the nice words
i read that article and man was i happy and proud he also quoted me ,,,, i feel important now
its funny how the author thinks that changing the plugs is hard ; its so esy even a caveman can do it
any how , i got some stuff done recently ( not as much as i was hoping but atleast its something off the list )
i got the fuel rail brackets done and the rails mounted , all i have to do now is bolt up the intake and hook up the fuel line, but this will wait a bit till i finish fooling around with the harness ( given how the harness is placed in the compartment i had to extend the MAP, crank , and ground wires).
i also ( finally) finished the throttle cable deal , routing 13 feet of throttle cable can be a pain
the cable goes from the throttle body through the gromet in the engine compartment where the harness goes through , then snakes its way next to the pcm , and then under the rear seat area then turns towards the center console where it goes forward to the attatchment point right under the dash . positioning the cable turned out to be crutial cause due to the added length , more places where pressing on the cable wich made pushing the throttle pedal hard if not imposible . so after spraying th inside of the cable with lube and moving it around to get bends as wide as possible i finally came up with the location of the cable as described above .
as for mounting the cable to the pedal , i just hooked it to the top and side of the pedal
here is how the able attaches to the pedal ( as well as more thumb **** for jimbo ):
and this s how the cable looks in place and attatched to the pedal :
and how it looks with everything in place , you can't even see/feel the cable when you're in the car
moving on , i took the fuel sending unit out ( well i tried to ) to inspect suff ; well it smells funny , and al the hoses seem intact as well as the wires, i was afraid that te stuff might be deteriorated from sitting that long , but nope ( i guess we have different additives in our gas , it doesn't go bad as quick as it does in the states )
also dropped te battery in place and hooked it up so i can verify some wires.
note : F-body owners ,,,, eat your heart out ! took me 2 minutes to get to the fuel pump
i was pleasantly surprised with a whole slew of warning lights and messages on the information center it came to life!!!
the bad news is that i could not find a ignition hot wire in the relay box at the rear ( next to the pcm and DME , i did find a constant hot but i'm not sure if it is constant through cranking .
another bummer was that i couldn't get a starter signal , i don't know if this is because there is a switch that has to be triggered in line to have it work or what, but ill chip away at it till i get it finished
in a dumb move ( as with many others i made ) i mounted the pump on the gine , and now i had to remove it so i can get a pressure hose made for it ( weird fitting) , i'll be doing that today and hopefuly have it all finished and scratched off the list .
so , next up :
- finish runnung the wires in the engine compartment
- finish hooking up the engine harness
- figure out the wiring inside the car ( starter signal , switched source , etc.)
- install the center console
- install the steering coulm stuff when it shows up
- driver door stuff
- maybe push this thing on the lift again so i can do some stuff under the car
and thanks to all of you for all the nice words
i read that article and man was i happy and proud
he also quoted me ,,,, i feel important now its funny how the author thinks that changing the plugs is hard ; its so esy even a caveman can do it
any how , i got some stuff done recently ( not as much as i was hoping but atleast its something off the list
)i got the fuel rail brackets done and the rails mounted , all i have to do now is bolt up the intake and hook up the fuel line, but this will wait a bit till i finish fooling around with the harness ( given how the harness is placed in the compartment i had to extend the MAP, crank , and ground wires).
i also ( finally) finished the throttle cable deal , routing 13 feet of throttle cable can be a pain
the cable goes from the throttle body through the gromet in the engine compartment where the harness goes through , then snakes its way next to the pcm , and then under the rear seat area then turns towards the center console where it goes forward to the attatchment point right under the dash . positioning the cable turned out to be crutial cause due to the added length , more places where pressing on the cable wich made pushing the throttle pedal hard if not imposible . so after spraying th inside of the cable with lube and moving it around to get bends as wide as possible i finally came up with the location of the cable as described above .
as for mounting the cable to the pedal , i just hooked it to the top and side of the pedal
here is how the able attaches to the pedal ( as well as more thumb **** for jimbo
):and this s how the cable looks in place and attatched to the pedal :
and how it looks with everything in place , you can't even see/feel the cable when you're in the car
moving on , i took the fuel sending unit out ( well i tried to
) to inspect suff ; well it smells funny , and al the hoses seem intact as well as the wires, i was afraid that te stuff might be deteriorated from sitting that long , but nope ( i guess we have different additives in our gas , it doesn't go bad as quick as it does in the states )also dropped te battery in place and hooked it up so i can verify some wires.
note : F-body owners ,,,, eat your heart out ! took me 2 minutes to get to the fuel pump
i was pleasantly surprised with a whole slew of warning lights and messages on the information center
it came to life!!!the bad news is that i could not find a ignition hot wire in the relay box at the rear ( next to the pcm and DME , i did find a constant hot but i'm not sure if it is constant through cranking .
another bummer was that i couldn't get a starter signal , i don't know if this is because there is a switch that has to be triggered in line to have it work or what, but ill chip away at it till i get it finished
in a dumb move ( as with many others i made
) i mounted the pump on the gine , and now i had to remove it so i can get a pressure hose made for it ( weird fitting) , i'll be doing that today and hopefuly have it all finished and scratched off the list .so , next up :
- finish runnung the wires in the engine compartment
- finish hooking up the engine harness
- figure out the wiring inside the car ( starter signal , switched source , etc.)
- install the center console
- install the steering coulm stuff when it shows up
- driver door stuff
- maybe push this thing on the lift again so i can do some stuff under the car
If it's plastic, you might want to super glue some metal pieces to both sides of the throttle cable to keep it from pulling on the plastic and possibly breaking. Just a thought.
Does the throttle cable rub any against the carpet? I'd hate to see you go full throttle and have it get stuck! It'd be a Toyota Porsche then!
Thanks for keeping us posted on your build! I look forward to reading your updates and am looking forward to seeing it run!
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Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
brian , the tank is different: it has two bladders one on each side of the front diff. and luckily the wires are ok
i decided to bypass the whole clutch switch , but more on that later
Irish , you but they will ( at least thats the plan )
Freddy , the pedal is made of thick plastic , and i did place some washers on both sides of the pedal . the exposed part of the cable does not rub on anything , but lamost half of the cable sheath ( if you can cal it that ) is under the carpet . but the issue is not the cable sticking , but more like the throttle cable spring being to stiff . but no worries , a quick spray of wd40 into the cable fixed that
any way ,,, more updates to report
i installed the intake manifold for the last time ( i hope ) and connected the fuel lines , all i have to do now is to plug one of the fuel rail ends. also extended a few wires on the harness and connected the injectors and what sensors i could.
also started tackeling integrating the ls1 harness into the car:
i broke it down to several tasks to make it easier for me ( given how much i like wiring ) and started chipping away at it :
i started with figuring out where to connect the all time positive and switched positive for the LS1 harness , after thinking about it for a while i decided the best palce to connect the wires was at the all time feed going to the MFI-DI relay ( basically the ignition relay for the car) . porsche set it up so that the all time + goes through a relay that is triggered when the switch is turned on , thus giving you a switched + .
so with that out of the way i looked at the starter signal , after messing around with the wires trying to bypass the starter signal relay , i found out that some of the wires were damaged in the fire . so i had to cut and bypass the whole relay altogether and now i have a working starter signal
moving on , i turned my ( limited ) attention to the fuel pump signal . the ls1 harness i have was already setup with a pump relay , so i ran the + wire from the relay al the way to the stock porsche relay under the dash, where i disconnected the relay and just pluged the + wire into the terminal going to the pump
next on the list was the fans , now luckily the porsche also uses a pcm ground trigger so all i had to do was find the wires going out from the porsche pcm and just cut them and connected them tot he ls1 harness , and now i have the fans set up for two speeds : fan 1 on the LS1 pcm turns on both porsche fans on the low setting , while the second fan on the LS1 pcm activates the HI setting on both porsche fans . scratch one more item off the list
technically i can now start the car , but it still has some ways to go .
so now the car interior is all wired and done , all i have to do is go over the fuses and replace any blown or missing fuses ( don't ask how i found that out ) and install the pcm back in - which i took out to have a sd tune written on to it .
so next up is install the center console , and the rest of the panels and the carpeting when it arrives .
i guess i'm done with any work on the inside ( other than putting everything back in ), which means i can focus on the outside again, which means next up is :
- finish the engine compartment mini harness
- coils and plugs/wires
- push the car to the lift so i can install the balancer
- FLUIDS!!!! (engine/trans oil, coolant, brake fluid, clutch fluid) and bleed
and its late and i can't think straight , but for some strange reason i found working on the wiring quite satisfying
so wish me luck
i decided to bypass the whole clutch switch , but more on that later
Irish , you but they will ( at least thats the plan
)Freddy , the pedal is made of thick plastic , and i did place some washers on both sides of the pedal . the exposed part of the cable does not rub on anything , but lamost half of the cable sheath ( if you can cal it that ) is under the carpet . but the issue is not the cable sticking , but more like the throttle cable spring being to stiff . but no worries , a quick spray of wd40 into the cable fixed that
any way ,,, more updates to report
i installed the intake manifold for the last time ( i hope ) and connected the fuel lines , all i have to do now is to plug one of the fuel rail ends. also extended a few wires on the harness and connected the injectors and what sensors i could.
also started tackeling integrating the ls1 harness into the car:
i broke it down to several tasks to make it easier for me ( given how much i like wiring
) and started chipping away at it :i started with figuring out where to connect the all time positive and switched positive for the LS1 harness , after thinking about it for a while i decided the best palce to connect the wires was at the all time feed going to the MFI-DI relay ( basically the ignition relay for the car) . porsche set it up so that the all time + goes through a relay that is triggered when the switch is turned on , thus giving you a switched + .
so with that out of the way i looked at the starter signal , after messing around with the wires trying to bypass the starter signal relay , i found out that some of the wires were damaged in the fire . so i had to cut and bypass the whole relay altogether and now i have a working starter signal
moving on , i turned my ( limited
) attention to the fuel pump signal . the ls1 harness i have was already setup with a pump relay , so i ran the + wire from the relay al the way to the stock porsche relay under the dash, where i disconnected the relay and just pluged the + wire into the terminal going to the pump next on the list was the fans , now luckily the porsche also uses a pcm ground trigger so all i had to do was find the wires going out from the porsche pcm and just cut them and connected them tot he ls1 harness , and now i have the fans set up for two speeds : fan 1 on the LS1 pcm turns on both porsche fans on the low setting , while the second fan on the LS1 pcm activates the HI setting on both porsche fans . scratch one more item off the list
technically i can now start the car , but it still has some ways to go .
so now the car interior is all wired and done , all i have to do is go over the fuses and replace any blown or missing fuses ( don't ask how i found that out ) and install the pcm back in - which i took out to have a sd tune written on to it .
so next up is install the center console , and the rest of the panels and the carpeting when it arrives .
i guess i'm done with any work on the inside ( other than putting everything back in ), which means i can focus on the outside again, which means next up is :
- finish the engine compartment mini harness
- coils and plugs/wires
- push the car to the lift so i can install the balancer
- FLUIDS!!!!
(engine/trans oil, coolant, brake fluid, clutch fluid) and bleed and its late and i can't think straight , but for some strange reason i found working on the wiring quite satisfying
so wish me luck
Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
well just tease you more here's a pic of the interior after i installed the driver seat and center console
all i have to do in the interior now is install the rear panel and carpet ( when it gets here)
as well as the steering wheel andstalk ( turn signal/ hi low beam , etc)
so now i can go back to working on the outside of the car.
like i mentioned , i have to install the harmonic balancer and finish the mini harness , and button up the fuel and coolant system ( i decided to bypass the heater hoses - for now- untill i get the ones i ordered ages ago ) so i can get to start the engine .
i also have to get a battery for the car that fits, along with all the needed fluids .
the plan is to first fill all the fluids and check for leaks , then pressurize the fuel system ans see if that leaks. after that its starter test time and see if she fires up
all i have to do in the interior now is install the rear panel and carpet ( when it gets here)
as well as the steering wheel andstalk ( turn signal/ hi low beam , etc)
so now i can go back to working on the outside of the car.
like i mentioned , i have to install the harmonic balancer and finish the mini harness , and button up the fuel and coolant system ( i decided to bypass the heater hoses - for now- untill i get the ones i ordered ages ago ) so i can get to start the engine .
i also have to get a battery for the car that fits, along with all the needed fluids .
the plan is to first fill all the fluids and check for leaks , then pressurize the fuel system ans see if that leaks. after that its starter test time and see if she fires up
just reread the whole page of updates (and oogled @ pics again) just for the "ifixedit" post..
still worth it
dirty, update your sig so you have all your builds in it; i found one the other day (azs mustang maybe?) and lost it when FF restarted..
still worth it
dirty, update your sig so you have all your builds in it; i found one the other day (azs mustang maybe?) and lost it when FF restarted..
Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
i tried to do a signature with links in it but i couldn't get it to work ( sig too long? )
how can i do it like your sig irish?
anyhow , here are the links
https://ls1tech.com/forums/conversio...onversion.html
https://ls1tech.com/forums/forced-in...r-427-etc.html
https://ls1tech.com/forums/conversio...version-d.html
https://ls1tech.com/forums/conversio...ustangs-d.html
https://ls1tech.com/forums/conversio...-into-evo.html
how can i do it like your sig irish?
anyhow , here are the links
https://ls1tech.com/forums/conversio...onversion.html
https://ls1tech.com/forums/forced-in...r-427-etc.html
https://ls1tech.com/forums/conversio...version-d.html
https://ls1tech.com/forums/conversio...ustangs-d.html
https://ls1tech.com/forums/conversio...-into-evo.html