Notices
GT4/Spyder Discussions about the 981 GT4/Spyder
Sponsored by:
Sponsored by: APR

4L X51 is IN!

Thread Tools
 
Search this Thread
 
Old 06-19-2017, 09:44 PM
  #16  
jmartpr
Rennlist Member
 
jmartpr's Avatar
 
Join Date: Jul 2015
Posts: 4,738
Received 1,457 Likes on 909 Posts
Default

Originally Posted by Jimmy-D
I would assume you may need to re-tune the car but who would have a tune for this type of upgrade???

Would not the "brains" of the car not be able to adapt to what is now going on with the motor??


Most definitely you will need to do a COBB ProTune, best would be on-site on a dyno but remote using logs is possible.....if you don't get arrested for doing 2nd and 3rd gear runs to redline
Old 06-19-2017, 09:58 PM
  #17  
ajw45
Three Wheelin'
Thread Starter
 
ajw45's Avatar
 
Join Date: Sep 2003
Location: NYC <> Boston
Posts: 1,624
Received 318 Likes on 168 Posts
Default

Originally Posted by Yargk
I'm guessing it's just that the X51 top end is a more noticeable difference than the 4L part.
Yeah, I think the major complaint from 991 owners was that the X51 made no more power until after 6500rpm and moved the torque peak up but that's what I wanted so it sounded perfect! On one hand I'm a little disappointed Porsche left so much on the table for what would have been just a few more parts out of the bin but at least it means there's a lot of potential left in the 9A1 already developed and tuned by Porsche engineers.....
Old 06-19-2017, 10:21 PM
  #18  
Bardman
Three Wheelin'
 
Bardman's Avatar
 
Join Date: Apr 2015
Posts: 1,528
Likes: 0
Received 19 Likes on 13 Posts
Default

Congrats! Awesome mod. Can you share a ballpark cost?
Old 06-19-2017, 11:40 PM
  #19  
Rick DeMan
Basic Sponsor
Rennlist
Site Sponsor

 
Rick DeMan's Avatar
 
Join Date: Jan 2004
Location: Nyack N.Y.
Posts: 1,536
Received 646 Likes on 202 Posts
Default

Andy!
This was by far one of my favorite cars to convert to our 4.0L X51 engine package! Glad you are loving it!

I'm always impressed with the results on our dyno with this engine, we have seen 440 RWHP that equates to just about 500 at the crank. The X51 manifold, cam and head package really allows the engine to flow above 6000 rpm and takes off like a rocket ship at the high rpm.

The 4.0L conversions we have done using the standard Carrera S intake produce much more TQ between 3000 and 6000 rpm but do fall off after the 6500 mark.

The combination of X51 and the 4.0 yield a healthy TQ base way above stock and an absolutely big silly grin making top end that I have only experienced in the GT3/RS models.

The tune is 100% custom and made especially for these conversions. Would be impossible without it. Performance is the silkiest smoothest delivery I have ever felt and the power just keeps climbing without any dips or flat spots.

Thanks again Andy!
Now let's go drag race a few GT3 RS's!
__________________
2016 GT4-R


Rick DeMan

DeMan Motorsport
Upper Nyack, NY
845 727 3070
Porsche Sales & Service
Porsche Race services and parts
www.DeManMotorsport.com
Old 06-20-2017, 01:32 AM
  #20  
calvinchan
Rennlist Member
 
calvinchan's Avatar
 
Join Date: Aug 2013
Location: San Francisco, CA
Posts: 201
Likes: 0
Received 0 Likes on 0 Posts
Default

Pictures & videos, please!
Old 06-20-2017, 01:45 PM
  #21  
Jimmy-D
Race Director
 
Jimmy-D's Avatar
 
Join Date: Mar 2014
Location: Midwest
Posts: 11,195
Received 1,390 Likes on 721 Posts
Default

Originally Posted by Rick DeMan
Andy!
This was by far one of my favorite cars to convert to our 4.0L X51 engine package! Glad you are loving it!

I'm always impressed with the results on our dyno with this engine, we have seen 440 RWHP that equates to just about 500 at the crank. The X51 manifold, cam and head package really allows the engine to flow above 6000 rpm and takes off like a rocket ship at the high rpm.

The 4.0L conversions we have done using the standard Carrera S intake produce much more TQ between 3000 and 6000 rpm but do fall off after the 6500 mark.

The combination of X51 and the 4.0 yield a healthy TQ base way above stock and an absolutely big silly grin making top end that I have only experienced in the GT3/RS models.

The tune is 100% custom and made especially for these conversions. Would be impossible without it. Performance is the silkiest smoothest delivery I have ever felt and the power just keeps climbing without any dips or flat spots.

Thanks again Andy!
Now let's go drag race a few GT3 RS's!
This must turn the GT4 in to a complete beast.

I am just wondering if you have had any engine issues with this conversion and if you provide any sort of warranty because the factory one would be out the window. Also - can this car be serviced at a regular Porsche Dealership?.

I ask these questions because certainly have an interest if I decide to pass on the .2 GT3 and just go nuts on my GT4
Old 06-20-2017, 01:50 PM
  #22  
Jimmy-D
Race Director
 
Jimmy-D's Avatar
 
Join Date: Mar 2014
Location: Midwest
Posts: 11,195
Received 1,390 Likes on 721 Posts
Default

Also - tried to reach you all and no way to leave a message when I called
Old 06-20-2017, 03:29 PM
  #23  
xxrockmanxneoxx
Instructor
 
xxrockmanxneoxx's Avatar
 
Join Date: Sep 2015
Posts: 240
Likes: 0
Received 0 Likes on 0 Posts
Default

vid please
Old 06-20-2017, 05:27 PM
  #24  
kfmcmahon
Three Wheelin'
 
kfmcmahon's Avatar
 
Join Date: Feb 2013
Location: East Amherst, NY
Posts: 1,984
Received 110 Likes on 57 Posts
Default

Originally Posted by Jimmy-D
This must turn the GT4 in to a complete beast.

I am just wondering if you have had any engine issues with this conversion and if you provide any sort of warranty because the factory one would be out the window. Also - can this car be serviced at a regular Porsche Dealership?.

I ask these questions because certainly have an interest if I decide to pass on the .2 GT3 and just go nuts on my GT4
+1
Old 06-20-2017, 06:02 PM
  #25  
Gofishracing
Race Car
 
Gofishracing's Avatar
 
Join Date: Feb 2003
Location: New Jersey
Posts: 3,935
Received 9 Likes on 9 Posts
Default

Hot stuff Rick!!
Old 06-20-2017, 10:07 PM
  #26  
James88
Three Wheelin'
 
James88's Avatar
 
Join Date: Aug 2012
Posts: 1,737
Received 153 Likes on 95 Posts
Default

Originally Posted by Jimmy-D
This must turn the GT4 in to a complete beast.

I am just wondering if you have had any engine issues with this conversion and if you provide any sort of warranty because the factory one would be out the window. Also - can this car be serviced at a regular Porsche Dealership?.

I ask these questions because certainly have an interest if I decide to pass on the .2 GT3 and just go nuts on my GT4
There you go Jimmy, this might be your answer to the perfect car !!
I'm sure they would offer warranty for this this level of work
Old 06-20-2017, 10:32 PM
  #27  
Mech33
Nordschleife Master
 
Mech33's Avatar
 
Join Date: Oct 2014
Posts: 5,345
Received 606 Likes on 371 Posts
Default

Originally Posted by James88
There you go Jimmy, this might be your answer to the perfect car !!
I'm sure they would offer warranty for this this level of work
Porsche blames mods, mod vendor blames Porsche. Customer left to deal with the fall out. Been there done that!
Old 06-20-2017, 10:43 PM
  #28  
NoGaBiker
Drifting
 
NoGaBiker's Avatar
 
Join Date: Feb 2011
Location: Midtown Atlanta
Posts: 3,383
Received 228 Likes on 123 Posts
Default

What could possibly go wrong???

(Yeah, BTDT myself as well.)
Old 06-20-2017, 11:00 PM
  #29  
BryanCO
Drifting
 
BryanCO's Avatar
 
Join Date: Feb 2014
Location: Colorado Springs
Posts: 2,941
Received 208 Likes on 148 Posts
Default

ajw45 -- simply awesome.
Old 06-20-2017, 11:53 PM
  #30  
Jimmy-D
Race Director
 
Jimmy-D's Avatar
 
Join Date: Mar 2014
Location: Midwest
Posts: 11,195
Received 1,390 Likes on 721 Posts
Default

Originally Posted by Mech33
Porsche blames mods, mod vendor blames Porsche. Customer left to deal with the fall out. Been there done that!
Once you go down this road with this conversion there is not turning back. That engine goes and it's on you. Also - selling the car may also be very difficult with this conversion. If i had money to blow and did not care this would certainly be the route


Quick Reply: 4L X51 is IN!



All times are GMT -3. The time now is 12:29 AM.