Conversions & Swaps LSX Engines in Non-LSX Vehicles
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2001 porsche 996 ls1 conversion

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Old Oct 16, 2016 | 05:33 AM
  #981  
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Sounds like all round, the turbo transmission is the one to go for ?

Stronger, would make the overall package more compact and better/taller gearing too ?
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Old Oct 16, 2016 | 11:44 AM
  #982  
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Thanks for the prompt reply.

Yes that'll be the difference then, all the other 996 to LS conversions I've seen during my research use a much thicker adapter from Kennedy but hey were all normal Carrera's to begin with.
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Old Oct 20, 2016 | 11:13 AM
  #983  
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Crud sorry man, my email was down for the last couple weeks so missed your response. I'll try and get the part number; dad is off work for a bit still so may be a week or so before I can get it. Will let ya know.
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Old Nov 28, 2016 | 02:26 AM
  #984  
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well I found out why was the car missing at high rpm's ,,,,
turns out the reluctor started to come apart.

so it was time to drop the engine again ;

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and this is the culprit:

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so that piece was replaced with a billet CBM unit that was pressed then welded in place. And since I had the engine down I decided relocate the map sensor to the back of the intake to get a clean reading at lower rmp's , I also decided to make a hole in the "fire wall" to run the harness through instead of having it go through the stock location behind the tail light and snake its way around. this way I also have easier access tot he engine compartment if I need to run any other wires later. I also used two rubber flaps to seal the hole along with a ring to hold them in place :

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and since I had everything apart I got a chance to inspect stuff; the clutch is holding very well with no signs of wear, same as rod and main bearings .
I did also notice that cylinder #8 exhaust port was leaking oil ,,, which explains the puffs of white smoke I had before ,,, and I assume its just normal guide ware ( normal in the sense that these are patriot heads that I bought around 2002 and had them on my Camaro for quite some time - read " abused " )

so after that it was time to shove the engine and trans back in :

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so all that is left now is to finish up the wiring , install the accessories and plumb the cooling lines , and add fluids

I also am thinking of running a new positive cable from the battery to the starter instead of the stocker - been getting a hard to start when hot issue that I could not get rid of so far.
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Old Nov 28, 2016 | 09:49 AM
  #985  
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did you pop the valve cover for #8 and look at it? May have just popped a seal loose. Although wear and tear is always a possibility as well
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Old Nov 28, 2016 | 01:21 PM
  #986  
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Sucks you had to take it back out. Cutting the access hole in the fire wall sure give better working room on the engine and wiring.
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Old Nov 28, 2016 | 06:18 PM
  #987  
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Was there no cable run on the passenger side back corner of the engine bay? I've got a widebody turbo and I recall there being an engine bay there that unscrews and another grommeted access port, is that the one you I'd behind the tail lights?

Speaking of tail lights, know that the tabs are VERY fragile! The lights are also expensive, there's a nice aftermarket replacement but it's about a grand for the pair. To protect them there's a guy selling "light savers" that reinforce the tabs. I can get you the info if you can't find them. The lights sometimes come free at speed ��

P.S. Bigger brakes are a spacer and rotor away, 330 to 350mm. 380 requires calipers, don't use the adapters out there for the stock calipers.

Last edited by BLKMGK; Nov 28, 2016 at 06:24 PM.
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Old Nov 29, 2016 | 03:42 AM
  #988  
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dualdj, I already swapped the valve seals a short while back.

outlaw, the hole I cut was a small one just to pass the holley harness from instead of the stock hole behind the pass tail light. its not an access panel deal .

blkmgk, the original Porsche harness is still there behind the pass tail light and goes through the grommet. I had the holley harness go through there as well but I really don't like how the harness has to go from the middle of the car to the end of the engine compartment and back again to the middle .
please do tell about the light savers ! I had to pay a pretty penny to get these new ones .
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Old Nov 30, 2016 | 01:44 AM
  #989  
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Certainly!

Pelican Parts sells them but you might be able to get them cheaper direct from the maker who is active on both 6SpeedOnline and Rennlist. His handle is Engineerboy100

http://www.pelicanparts.com/catalog/...ight-Saver.htm

Lots of cool stuff out there for these cars
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Old Nov 30, 2016 | 06:22 AM
  #990  
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Interesting project, I haven't read thru it all, but will
I was watching a show last night about drag racing in Cuba, a guy had a
Porsh with a small block chevy in it
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Old Dec 1, 2016 | 01:06 AM
  #991  
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thanks!
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Old Dec 21, 2016 | 08:33 AM
  #992  
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well I finished putting every thing back together again ,,,, and guess what the problem is still there
so I decided to throw in a new set of cam and crank sensors just to see if it helps , I also relocated the cam harness and used the stock cam harness extension and shield that routs the harness under the engine ( it also made the cam sensor extension not needed in my application ) and that seemed to fix the misfire issue!

so now the car revs to the redline effortlessly , and it hits 17 psi right away ,,,,, and starts drifting sideways in 4th gear !
the thing is scary under WOT , even with the drag radials in the rear.

but that brought out the next weak link in the chain ; the new clutch

kennedy told me that this clutch was good to 750-800 hp at the crank , but when I got it I wasn't expecting this thing to make more than 600 at the wheels , let alone 840.

so for now I guess i'll turn the boost down to 12-14 psi which should help a bit .
and I have to start looking for a solution for my clutch problem .

I need to find a twin disc setup that fits on the stock Porsche flywheel ( since it has the same pressure plate bolt hole pattern as the flywheel I have ) , I remember seeing a setup like that a while ago but can't find it anymore.

anyone have any leads?
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Old Dec 21, 2016 | 10:01 AM
  #993  
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Originally Posted by 1dirtyZ
well I finished putting every thing back together again ,,,, and guess what the problem is still there
so I decided to throw in a new set of cam and crank sensors just to see if it helps , I also relocated the cam harness and used the stock cam harness extension and shield that routs the harness under the engine ( it also made the cam sensor extension not needed in my application ) and that seemed to fix the misfire issue!

so now the car revs to the redline effortlessly , and it hits 17 psi right away ,,,,, and starts drifting sideways in 4th gear !
the thing is scary under WOT , even with the drag radials in the rear.

but that brought out the next weak link in the chain ; the new clutch

kennedy told me that this clutch was good to 750-800 hp at the crank , but when I got it I wasn't expecting this thing to make more than 600 at the wheels , let alone 840.

so for now I guess i'll turn the boost down to 12-14 psi which should help a bit .
and I have to start looking for a solution for my clutch problem .

I need to find a twin disc setup that fits on the stock Porsche flywheel ( since it has the same pressure plate bolt hole pattern as the flywheel I have ) , I remember seeing a setup like that a while ago but can't find it anymore.

anyone have any leads?
Kenndy should be your source. Your transaxle is no different then a Albins or Mendiola. Both of those transaxle run the Porsche main shaft, the sandrail guys run double and triple disc clutch set ups that handle 1000 + HP.
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Old Dec 21, 2016 | 01:11 PM
  #994  
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WOW 840 to the wheels! NICE !
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Old Dec 21, 2016 | 01:59 PM
  #995  
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4lux ,
I already talked to kennedy and they don't have a twin disc setup for this application yet. the guy I talked to says they will look into it to see if it is feasible.

I think it is real easy its just a matter of time before someone comes up with a solution.
I will start snooping around sandrail sites and buggies and see what I can find
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Old Dec 21, 2016 | 05:07 PM
  #996  
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Looks like clutch masters makes a twin disc.........if you can swing it.
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Old Dec 21, 2016 | 11:35 PM
  #997  
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You MIGHT have luck talking to Sean at Silly Rabbit Motorsports. He already makes a custom twin and triple disk clutch for the Porsche guys using a flywheel he makes and Tilton pieces, he's making custom clutch master cylinders too which I'll be running soon enough in my 996. He's a talented but busy guy who certainly has the equipment to do what you need but he's also pretty busy building parts to sell already to Porsche folks. He's in 'Vegas if that helps, tell him I sent you lol. Good luck!
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Old Dec 22, 2016 | 04:22 PM
  #998  
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outlaw ,
I saw those , but you will need to use their flywheel , which is Porsche specific and will not bolt to my flywheel.

blkmgk , thanks once again , i'll give him a call and see what he says .
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Old Feb 23, 2017 | 03:10 AM
  #999  
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Hey 1dirtyZ,
I was thinking about purchasing an '02 996 that is missing the engine, transmission, and exhaust. Everything else is in tact. I was interested in doing the LS1 swap, but after reading through your excellent thread, it seems as if the swap is very intricate, time consuming, expensive, & difficult.

I would plan to purchase another automatic transmission and mate it to the LS1.

Would you be able to give me any idea of the components that I'd need (cradle, adapter plate, etc) to make this work?

Excellent work my friend,
Thanks,
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Old Feb 23, 2017 | 03:30 AM
  #1000  
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I think you would be hard pressed to find a mid gearbox transaxle in a simple automatic, given there are very few such cars.

It would need to be a transmission from a 911 really given teh need to retain the rear engine layout
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