Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
Join Date: Mar 2019
Posts: 8
Conversion from 217 to 231 HK

Hello forum
I am thinking to Update my 88`carrera to 231hk , 95000 miles
Question is? I allready have my heads off due to High Oil consumption,
So🧐is the only diff between 217 and 231 the pistons? Or do i also have to repl cylinders?dme chip Update ? Cam timing etc.
My cylinders is finde, only needs a light honing,but new ring needed, but still within limit.
In Europe we dont have the low oktane problem goes from 92-100 oktane

Hope you Can help
Reg Jesper

Old 03-03-2019, 11:53 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,493
The Mahle 3.2 pistons have the same casting numbers in the pistons.
In comparison of the two, the 10.3 are a couple mm taller on the high lobe piston face.
The cylinders are the same Nikisil.
Bruce
Old 03-04-2019, 06:44 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered
 
Join Date: Mar 2019
Posts: 8
Thanks Bruce 👍
So the only thing i do is to repl pistons with new mahle EU 231hk pistons and rings?
Thats all!,,,
Old 03-04-2019, 07:17 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered
 
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,493
The euro spec engine changes the cam timing, virtually everything else on the long block are identical.
Bruce
Old 03-04-2019, 10:19 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
Join Date: Mar 2019
Posts: 8
Timing

Thanks Bruce
Do you know the timing value on EU spec. ?
Acc to waynes book there is only one value 1,1-1,4🤔so i am a little confused
Reg Jesper
Old 03-04-2019, 11:05 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered
 
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,493
Low battery, my teaching moment disappeared.
Youre correct on all carrera cam timing is ideal setting 1.25 with 1.1/1.4 the window.
The carrera and SCs use the same cam and there is different settings for 3.0 US and Euro across the compressions.
Bruce
Old 03-04-2019, 04:45 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Nux Nux is offline
Registered
 
Nux's Avatar
 
Join Date: Mar 2016
Location: Copenhagen, Denmark
Posts: 684
Garage
Make sure your cylinders are nikasil. Some were made by Kolbenschmidt which were Alusils. Those cannot be honed. Check with a little magnet on the cylinder walls and by counting the cooling fins. Magnetic and 11 fins: Nikasil.
Old 03-05-2019, 01:02 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered
 
Join Date: Mar 2019
Posts: 8
Thanks for inf. Both,👍 my cylinders have 10 fins 🤮
Old 03-05-2019, 02:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Nux Nux is offline
Registered
 
Nux's Avatar
 
Join Date: Mar 2016
Location: Copenhagen, Denmark
Posts: 684
Garage
Quote:
Originally Posted by Jesper g View Post
Thanks for inf. Both,👍 my cylinders have 10 fins 🤮
Where are you located? I just happen to have a complete set P/C with new Mahle 10.3 pistons and Goetze rings
Old 03-05-2019, 02:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered
 
Join Date: Mar 2019
Posts: 8
Hej Martin
Denmark Roskilde
Har skrevet til dig på fb
Old 03-05-2019, 03:29 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered
 
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
3.2--3.4

You are in luck with Alusil bores.Have them opened up to 98mm with Nicasil and use CP Pistons.Replating the Alusils holds up better than replating Nicasil.CP Piston is also way lighter.Chip will have to be changed but 250 HP for the same amount of money.Lighter flywheel and you are there.Ciao Fred

Old 03-05-2019, 03:35 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Reply


 


All times are GMT -8. The time now is 11:14 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.