3 Liter Turbo Registry - Page 15 - Rennlist - Porsche Discussion Forums

Notices

3 Liter Turbo Registry

Reply

Old 02-10-2009, 12:39 AM
  #211  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,437
Default

Originally Posted by Rogue_Ant View Post
3.4! Holy crap. What kind of sleeves?
Search his 'Recent posts' and you can read up somethings about this build.
333pg333 is offline  
Reply With Quote
Old 02-10-2009, 07:38 PM
  #212  
George D
Super User
 
George D's Avatar
 
Join Date: Aug 2006
Location: Tucson and Greer Arizona
Posts: 2,659
Default

Garrity at Motorsport is developing a longer stroke to get to 3.4. I'll give an update when he is willing to share.

George
George D is offline  
Reply With Quote
Old 02-10-2009, 09:21 PM
  #213  
tone3721
User
 
tone3721's Avatar
 
Join Date: Feb 2004
Location: AZ/CA
Posts: 1,790
Default

Originally Posted by George D View Post
Garrity at Motorsport is developing a longer stroke to get to 3.4. I'll give an update when he is willing to share.

George
Sweet. I plan on doing a 968, with as much displacement as possible, eventually. Maybe this year, sometime after I recuperate from the 951. The 951 will stay 3.0. After paint/wheels, Ill be done sinking large chunks of cash, into it. Youll definitely have to let us know George.
tone3721 is offline  
Reply With Quote
Old 02-11-2009, 02:43 AM
  #214  
Olli Snellman
Super User
 
Olli Snellman's Avatar
 
Join Date: Jun 2001
Location: Finland
Posts: 4,479
Default

Still under building process (lack of hobby funds)


Bore: 104.5 (Alusil)
Stroke: 88
Pistons: Mahle/Andial 104.5 turbo pistons
Rods: PO-Metal
Block: S2
Head: Factory new 2.7L with Chevy big block valves
Turbo: Holset
Engine Management: VR
Other: Dbilas cam
Olli Snellman is offline  
Reply With Quote
Old 02-11-2009, 02:07 PM
  #215  
RajDatta
Addict
Rennlist Member
 
RajDatta's Avatar
 
Join Date: Feb 2003
Location: NJ
Posts: 9,634
Default

Originally Posted by Chris White View Post
AN interesting note for 8v 3 liter builders - the 16v 3.0 engines have a harmonic damper built into the a/c alt pully and the 8v engine do not. The harmonic damper is a good idea to keep for the larger crank....
Chris, correction on that. Only the S2 has this harmonic damper. 968's get DMF, which provides the damper features. Also, 968 turbo S from the factory had this vibration damper so it was used on 8 valve heads as well.
Regards.
Raj
RajDatta is offline  
Reply With Quote
Old 02-11-2009, 02:11 PM
  #216  
RajDatta
Addict
Rennlist Member
 
RajDatta's Avatar
 
Join Date: Feb 2003
Location: NJ
Posts: 9,634
Default

Originally Posted by Thom View Post
In PET the pulley for the 944 S2 (M44/41) is labeled "vibration damper" whereas the one for the 968 (M44/43 M44/44) is labeled "pulley". Parts numbers are different
Might the 968 pulley actually have no impact as a harmonic damper given the presence of the dual mass flywheel ?
You are 100% correct. 968's have just a standard light weight pulley unlike the S2, which has this harmonic damper. 968's get DMF.
Raj
RajDatta is offline  
Reply With Quote
Old 02-13-2009, 12:38 AM
  #217  
thingo
Addict
Rennlist Member
 
thingo's Avatar
 
Join Date: Feb 2005
Location: Sydney Australia
Posts: 1,105
Default

Mine is a work in progress, well more like a wait in progress at the moment.

thingo, 3.1 Darton MID,custom wossner,16v,FP HTA gt3582,variable cams,motec
thingo is offline  
Reply With Quote
Old 02-14-2009, 09:46 AM
  #218  
mikeyoman
Addict
Rennlist Member
 
mikeyoman's Avatar
 
Join Date: Nov 2002
Location: Muscat, Oman
Posts: 284
Default

Almost finished ! Hoping to fire her up in 2 weeks. report to follow.

LR 3.1
Bore: 105 NiCom
Stroke: 88.6
Pistons: JE ceramic coated
Rods: Carrillo
Block: '93 968
Head: 8v LR stg3, solid lifters
Turbo: LR S75
Engine Management: LR chips
Other: LR stg4 MAF & more

(happy now Rob !)
mikeyoman is offline  
Reply With Quote
Old 02-14-2009, 10:14 AM
  #219  
RolexNJ
Addict
Lifetime Rennlist
Member
 
RolexNJ's Avatar
 
Join Date: Jan 2002
Location: New Jersey
Posts: 5,323
Default

Originally Posted by mikeyoman View Post
happy now Rob!
Hey Mike glad to see you make a post about your car. And that engine department looks very familar to me? Anyway, we're looking forward to hearing more about your 3.1L build at some point!

RolexNJ is offline  
Reply With Quote
Old 02-14-2009, 10:44 AM
  #220  
tone3721
User
 
tone3721's Avatar
 
Join Date: Feb 2004
Location: AZ/CA
Posts: 1,790
Default

Ugh, im so ancy I cant wait for my car to be done!!!!!!!!!!!!!!! I was told yesterday another week minimum. The builder is takin his sweet time to tune, thats ok tho, quality takes time. They want to do the break in themselves too, thats mostly the hold up at this point. I feel like a kid counting the days to xmas. Did I mention Im ancy, and cant wait? LOL

I figured if anyone understood my angst, its you guys. LOL
tone3721 is offline  
Reply With Quote
Old 02-14-2009, 12:42 PM
  #221  
Tom M'Guinn
Addict
Rennlist Member

Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 10,401
Default

I've been trying to keep the list up to date, but if you see any errors, let me know.

In the meantime, I have a question: I have seem the S2/968 crank stroke referred to as 87.8mm, as 88mm and as 88.6. All the Porsche reference materials I've seen, such as the 968 factory manual, list it as an 88mm stroke. So, where are people getting these other specs? Even clarks-garage lists it as 87.8. Anyone know why?
Tom M'Guinn is offline  
Reply With Quote
Old 02-14-2009, 04:16 PM
  #222  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,437
Default

Yeah I've been wondering about that too Tom. Someone mentioned to me in passing that there was a different crank and I think it was from one of the 968s but I will have to try and dig this up.

This would obviously have a direct effect on the nominated capacity of the car. I know we round it out, but some guys are saying 3L and some 3.1L. Both with 105s? Perhaps different rods?
333pg333 is offline  
Reply With Quote
Old 02-14-2009, 04:31 PM
  #223  
Tom M'Guinn
Addict
Rennlist Member

Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 10,401
Default

Well, 1mm difference in stoke make about 34cc difference in overall displacement on a 104mm bore, so these reported stroke differences would make even less impact on total cc's. I've been poking around and cannot find anything but 88 in Porsche's literature, but assume there is more to the story since clarks-garage shows 87.8 (and clark is usually a good fact checker) and a number of people have said 88.6 in this thread. If anything, I was just curious if I calculated my compression ratio correctly, since I used 88mm stroke without actually checking.
Tom M'Guinn is offline  
Reply With Quote
Old 02-14-2009, 05:27 PM
  #224  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,437
Default

Perhaps it's just been that people have started rounding up the 87.8 to 88? Not sure on the 88.6 though. Perhaps that's the one I was informed about. Interesting that this hasn't surfaced before though?
333pg333 is offline  
Reply With Quote
Old 02-15-2009, 02:28 AM
  #225  
mikeyoman
Addict
Rennlist Member
 
mikeyoman's Avatar
 
Join Date: Nov 2002
Location: Muscat, Oman
Posts: 284
Default

have to admit I didn't really check to well with my stroke numbers. Could have swore I found a site with the specs only last week, quoting 88.6, can't find it now. as you say all the books state 88.
mikeyoman is offline  
Reply With Quote

Thread Tools
Search this Thread
Quick Reply: 3 Liter Turbo Registry


Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: