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

GT4 - Unlocking the Power Potential!

Thread Tools
 
Search this Thread
 
Old 03-23-2017, 01:46 PM
  #886  
kahane18
Racer
 
kahane18's Avatar
 
Join Date: Jun 2016
Location: NYC
Posts: 454
Likes: 0
Received 21 Likes on 8 Posts
Default

[QUOTE=Fabspeed Motorsport;14055030]lol



"A blistering amount of torque improvement is the biggest transformation, but thats not to say the hp is much less impressive. It is worth a plane ticket to go experience it in person, trust me you'll be more than impressed haha"

Not sure car needs much more power, it already spins the wheels all the way to 3rd gear under hard acceleration. another $30k hmm... that and the trade in value of mine will get me a new GT3....

Oh just remembered, for about a third of that i can just bolt on a supercharger to it and get same or better numbers...I'm sure your shop can accommodate?
Old 03-23-2017, 02:02 PM
  #887  
ShakeNBake
Rennlist Member
 
ShakeNBake's Avatar
 
Join Date: Mar 2009
Posts: 5,653
Received 953 Likes on 551 Posts
Default

[QUOTE=kahane18;14055205]
Originally Posted by Fabspeed Motorsport
lol



"A blistering amount of torque improvement is the biggest transformation, but thats not to say the hp is much less impressive. It is worth a plane ticket to go experience it in person, trust me you'll be more than impressed haha"

Not sure car needs much more power, it already spins the wheels all the way to 3rd gear under hard acceleration. another $30k hmm... that and the trade in value of mine will get me a new GT3....

Oh just remembered, for about a third of that i can just bolt on a supercharger to it and get same or better numbers...I'm sure your shop can accommodate?
I don't know where you'd fit a super charger.

I think in the spirit of what makes the GT4 great, you'd want to go the path of a power kit to get it closer to how the motor should have felt from the factory. The big difference between the GT3 vs GT4 is not the torque, it's that the GT3 pulls hard all the way to redline (and yes, the redline is t 9k). GT4 loses interest around 6500, even though it can rev to 8ish. The Powerkit fixes that problem, and while the redline is not raised, the car now pulls hard all the way to 7800. That is not necessarily worth the lap time gains, but it's worth the smiles for sure.
Old 03-23-2017, 02:20 PM
  #888  
John@Fabspeed
Basic Sponsor
Rennlist
Site Sponsor

 
John@Fabspeed's Avatar
 
Join Date: Nov 2006
Location: Fort Washington, Pa
Posts: 4,717
Received 56 Likes on 40 Posts
Default

[QUOTE=kahane18;14055205]
Originally Posted by Fabspeed Motorsport
lol



"A blistering amount of torque improvement is the biggest transformation, but thats not to say the hp is much less impressive. It is worth a plane ticket to go experience it in person, trust me you'll be more than impressed haha"

Not sure car needs much more power, it already spins the wheels all the way to 3rd gear under hard acceleration. another $30k hmm... that and the trade in value of mine will get me a new GT3....

Oh just remembered, for about a third of that i can just bolt on a supercharger to it and get same or better numbers...I'm sure your shop can accommodate?
You find me a supercharger for that car and I am SO DOWN! Putting a supercharger on a 2017 Escalade next month, and Alpha 9 turbos on a GTR right now haha
__________________
Porsche Performance Specialist
John@Fabspeed.com
215-618-9796

Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034
www.Fabspeed.com


Old 03-23-2017, 02:23 PM
  #889  
kahane18
Racer
 
kahane18's Avatar
 
Join Date: Jun 2016
Location: NYC
Posts: 454
Likes: 0
Received 21 Likes on 8 Posts
Default

[QUOTE=ShakeNBake;14055273]
Originally Posted by kahane18

I don't know where you'd fit a super charger.

I think in the spirit of what makes the GT4 great, you'd want to go the path of a power kit to get it closer to how the motor should have felt from the factory. The big difference between the GT3 vs GT4 is not the torque, it's that the GT3 pulls hard all the way to redline (and yes, the redline is t 9k). GT4 loses interest around 6500, even though it can rev to 8ish. The Powerkit fixes that problem, and while the redline is not raised, the car now pulls hard all the way to 7800. That is not necessarily worth the lap time gains, but it's worth the smiles for sure.

I am well aware of the GT4's capabilities and I was only poking some fun at the $30k price tag on the engine mods.

For $30 to $40k on top of my GT4 i can realistically get on line at my dealer for an allocation on a GT3, the question is do I want to?

I love the GT4 enough to keep it a wile longer but spending that much money on it that you will never get back when you sell doesn't seem worth it for me.(just my .02c)
Old 03-23-2017, 02:30 PM
  #890  
kahane18
Racer
 
kahane18's Avatar
 
Join Date: Jun 2016
Location: NYC
Posts: 454
Likes: 0
Received 21 Likes on 8 Posts
Default

[QUOTE=Fabspeed Motorsport;14055329]
Originally Posted by kahane18

You find me a supercharger for that car and I am SO DOWN! Putting a supercharger on a 2017 Escalade next month, and Alpha 9 turbos on a GTR right now haha
Ok maybe not a supercharger...but I'm sure i saw somewhere that someone makes turbos for the Caymans. Almost the same thing....
Old 03-23-2017, 02:39 PM
  #891  
ShakeNBake
Rennlist Member
 
ShakeNBake's Avatar
 
Join Date: Mar 2009
Posts: 5,653
Received 953 Likes on 551 Posts
Default

[QUOTE=kahane18;14055336]
Originally Posted by ShakeNBake


I am well aware of the GT4's capabilities and I was only poking some fun at the $30k price tag on the engine mods.

For $30 to $40k on top of my GT4 i can realistically get on line at my dealer for an allocation on a GT3, the question is do I want to?

I love the GT4 enough to keep it a wile longer but spending that much money on it that you will never get back when you sell doesn't seem worth it for me.(just my .02c)
I hear ya.
Old 03-23-2017, 05:09 PM
  #892  
BGB Motorsports
Basic Sponsor
Rennlist
Site Sponsor

Thread Starter
 
BGB Motorsports's Avatar
 
Join Date: Jul 2007
Location: Ormond Beach, FL
Posts: 2,782
Received 600 Likes on 268 Posts
Default

Originally Posted by kahane18
I already have the headers tune and IPD on the car, what is the realistic gain by by increasing displacement for $30k?
Probably 80 rwhp and 40 rwlb/ft. This iteration produces just shy of 500 hp if you can get on a dyno outside of Florida where it's hot 12 months per year. Everyone calls or emails weekly about putting a GT3 motor in a Cayman and no one does it because it will cost well over $100K. We are pretty proud of being able to put near 500 hp in the GT4 for that money. Our customers dont plan to sell these cars any time soon because now they have GT3 power in the Cayman. To each his own. My $.02.
__________________
BGB Motorsports Group
Old 03-23-2017, 05:56 PM
  #893  
kahane18
Racer
 
kahane18's Avatar
 
Join Date: Jun 2016
Location: NYC
Posts: 454
Likes: 0
Received 21 Likes on 8 Posts
Default

Originally Posted by BGB Motorsports
Probably 80 rwhp and 40 rwlb/ft. This iteration produces just shy of 500 hp if you can get on a dyno outside of Florida where it's hot 12 months per year. Everyone calls or emails weekly about putting a GT3 motor in a Cayman and no one does it because it will cost well over $100K. We are pretty proud of being able to put near 500 hp in the GT4 for that money. Our customers dont plan to sell these cars any time soon because now they have GT3 power in the Cayman. To each his own. My $.02.
Got It.

Thanks for the input.
Old 03-23-2017, 09:06 PM
  #894  
jlennox
Advanced
 
jlennox's Avatar
 
Join Date: Aug 2012
Posts: 66
Likes: 0
Received 5 Likes on 4 Posts
Default

Do have to lower the Rev limit to compensate for increased piston speed? Also is the rod length shortened from stock? Thanks!
Old 03-24-2017, 10:39 AM
  #895  
user1029
Drifting
 
user1029's Avatar
 
Join Date: Feb 2015
Posts: 3,176
Received 558 Likes on 273 Posts
Default

I heard some rumblings of a 4.4L 9A1 stroker last year...
Old 03-24-2017, 01:46 PM
  #896  
9elheven
Addict
Rennlist Member

 
9elheven's Avatar
 
Join Date: Jan 2004
Location: Central NJ
Posts: 736
Received 164 Likes on 111 Posts
Default

user1029 - the devil's disciple? Now what's my credit limit again?
Old 03-25-2017, 12:31 AM
  #897  
tcsracing1
Rennlist Member
 
tcsracing1's Avatar
 
Join Date: May 2008
Location: Somewhere in a galaxy far, far away....
Posts: 17,107
Likes: 0
Received 258 Likes on 172 Posts
Default

given the market price of early DFI boxsters, a 4.0L X51 swap is very interesting proposition for one of these cars.
Old 03-25-2017, 12:22 PM
  #898  
jmartpr
Rennlist Member
 
jmartpr's Avatar
 
Join Date: Jul 2015
Posts: 4,755
Received 1,474 Likes on 918 Posts
Default

Originally Posted by tcsracing1
given the market price of early DFI boxsters, a 4.0L X51 swap is very interesting proposition for one of these cars.

This could be a very interesting track project and one I may do in the future as a dedicated track car.....I always check with local insurance companies just in case a boxster or cayman, that is fixable for track, becomes available....
Old 03-25-2017, 02:51 PM
  #899  
trebien
Racer
 
trebien's Avatar
 
Join Date: Dec 2015
Location: TX & CA
Posts: 439
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by user1029
I heard some rumblings of a 4.4L 9A1 stroker last year...
This is a thing:

4.0 - pistons
4.2 - crank
4.5 - all in.
Old 03-25-2017, 09:33 PM
  #900  
Voyager6
Instructor
 
Voyager6's Avatar
 
Join Date: May 2016
Posts: 185
Received 8 Likes on 7 Posts
Default

Originally Posted by trebien
This is a thing:

4.0 - pistons
4.2 - crank
4.5 - all in.
4.0L can be gotten by either 104mm pistons and the stock 77.5mm stroke or the stock 102mm pistons and an 81.4mm crank.

The common 4.2 L configurations requires a 81.4mm stroke crankshaft and 104mm pistons. To get there via a crank alone would require 102mm pistons and 85mm stroke. It is thought that the max you can move the wrist pin in a piston to compensate for longer stroke is 2mm (4mm added stroke) due to nearness of the bottom ring.. The rest has to come from shorter rods to keep the pistons in the block. I am not aware of anyone who has made a 85mm crankshaft.

Bigger than 104mm, you tell me. One thing's for sure, the longer stroke and shorter rods and heavier pistons are going to wear the cylinders a lot quicker. Might have to lower tthe max RPM to extend life.

V6


Quick Reply: GT4 - Unlocking the Power Potential!



All times are GMT -3. The time now is 05:28 PM.