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 Technical BBS > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum

Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Crank is at the shop for magnaflux and polishing, I had them record all the original journal diameters to compare to my measurements. Cylinders 2 & 5 are on the way to US Chrome for new Nicasil and hone to std. Heads are on the way to cgarr. I have one squirter that's stuck open so I need to try some MEK on it or replace it. I'm in the process of upgrading my air system right now by adding a 2nd motor/pump to run parallel with the existing 5hp into the same 60 gal tank, should give me 20-21 SCFM @ 90. I got tired of the blaster outrunning the compressor. I'm also adding a cyclone separator so I don't have to clean the shop vac filter every couple hours.

Last edited by boosted79; 03-12-2016 at 07:14 AM..
Old 03-12-2016, 05:51 AM
  Pelican Parts Technical Article Directory    Reply With Quote #41 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Goetz end gaps

After losing a month due to a Porsche Motorsport main bearing fiasco I've finally got everything that I need to begin assembly. I am not impressed with the Goetze rings. The gaps are way over the high end of the stock specs! Has anyone else found this? In a cylinder that was replated by US Chrome and is EXACTLY at the low end of spec I got .018" gap on the oil ring and .013" on the two compression. The spec is .006-.012". What the ?? Some of the new rings are only a couple thou tighter than the 80k mile ones I took out. Does anyone make anything that fits right anymore? Should I go with Total Seal? I'm sure these will work fine for a street engine but it just pi$%#* me off. US Chrome did a fantastic job so there are still some companies that take pride in their product.
Old 05-06-2016, 09:59 AM
  Pelican Parts Technical Article Directory    Reply With Quote #42 (permalink)
Registered User
 
Alan L's Avatar
 
Join Date: Apr 2006
Location: New Zealand
Posts: 2,809
That excessive ring gap seems common. Sad but true. there was a time rings were over sized and you gapped them to spec. That seems to be gone these days.
Alan
__________________
83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 05-08-2016, 06:07 PM
  Pelican Parts Technical Article Directory    Reply With Quote #43 (permalink)
Registered User
 
911tracker85's Avatar
 
Join Date: Feb 2009
Location: Park Hills, KY
Posts: 1,336
I am about to send my case and heads to Steve Weiner, Rennsport systems.

he keeps telling me how bad some of the new parts are.
__________________
Bob Cox
84 928S, Ruby Red linen/brown interior - preferred DD
85 911 Targa, White Gold/brown int - retired from track.
86 944 turbo my new DE/track car.
78 930 clone project car.
Old 05-09-2016, 05:37 AM
  Pelican Parts Technical Article Directory    Reply With Quote #44 (permalink)
Registered User
 
Alan L's Avatar
 
Join Date: Apr 2006
Location: New Zealand
Posts: 2,809
There is another posting on the 911 forum at the moment complaining about the same thing.
Alan
__________________
83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 05-09-2016, 12:27 PM
  Pelican Parts Technical Article Directory    Reply With Quote #45 (permalink)
3 restos WIP = psycho
 
kenikh's Avatar
 
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,709
Crap bearing, crap rings, this crap just gets more common. I know a builder who only uses Total Seal rings now.
__________________

- 1965 911
- 1969 911S
- 1980 911SC Targa
- 1979 930
Old 05-17-2016, 06:47 AM
  Pelican Parts Technical Article Directory    Reply With Quote #46 (permalink)
 
Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Tell me about it. Now I'm getting clearances with new Clevite coated rod bearings that are more than the old ones that came out. The big ends all checked out ok with the new ARP's so my machinist left them alone and installed new solid pin bushings. Three rods are at 3.5 - 4.0 thou " vs 3.0 with the old ones. Spec is .030 - .088 mm or .0012 - .00346". The big ends are all at the upper limit of spec. and the journals are all just above the wear limit. So back to the machine shop to get the caps cut and big ends honed to low std to tighten up the clearances. I figured the new coated bearings would tighten up the clearance enough but no. Porsche's low spec on clearance at .0012" seems very tight to me for a 2.2" journal, I'd like to see .002 -.0025" for street engine. The new Porsche oem mains all came in .0018-.002" so I'm happy with that. Should have just reused the old bearings and had them coated like kenikh said!
Old 05-18-2016, 06:12 AM
  Pelican Parts Technical Article Directory    Reply With Quote #47 (permalink)
Registered User
 
Join Date: Jan 2012
Location: Orchard Park NY
Posts: 115
boosted79

do you have someone locally doing the machine work?
Old 05-18-2016, 02:54 PM
  Pelican Parts Technical Article Directory    Reply With Quote #48 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
I've been gone. Not quite locally, Carl McQuillen Racing Engines engines in Leroy. Check out his website, will pick up the rods tomorrow. There is also Klipsie near you but I haven't used them but they look good. McQuillen did my Canyon solid pin bushing install, they are perfect. I know he gets a lot of business, I don't think he's done much Porsche work but I'm sure he can do the generic stuff no problem. If you need jugs replated US Chrome did a great job, mine are perfect.
Old 05-22-2016, 01:55 PM
  Pelican Parts Technical Article Directory    Reply With Quote #49 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Got the rods back and checked the clearances with Mitu mic and Fowler bore gauge. Tightest is #1 at 1.5, #2 - #5 at 2.0-2.3, #6 at 2.5 thou". Good to go. For high rpm race I'd want 2.5- 3.0 but this is fine for a 6k street engine. Now to fab a fixture to balance the rods since they were cut and I used solid bushings.
Old 05-24-2016, 06:22 AM
  Pelican Parts Technical Article Directory    Reply With Quote #50 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Finally got some time to work on this, I need to move a cot into my shop and lock the door for a couple weeks. I decided to take the #1 rod back to the machinist to open up the big end slightly so now the clearance is at 2.2 thou" in line with the rest. I balanced the pistons and rods, all to within 0.1 g. Overkill for a street machine for sure. The spread on the total rod weights was 3.7 g from the factory however on the small ends the spread was 7.2 g. Now to finally get this thing together.
Old 06-08-2016, 05:02 PM
  Pelican Parts Technical Article Directory    Reply With Quote #51 (permalink)
Registered User
 
TurboKraft's Avatar
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,343
Quote:
Originally Posted by boosted79 View Post
After losing a month due to a Porsche Motorsport main bearing fiasco I've finally got everything that I need to begin assembly. I am not impressed with the Goetze rings. The gaps are way over the high end of the stock specs! Has anyone else found this? In a cylinder that was replated by US Chrome and is EXACTLY at the low end of spec I got .018" gap on the oil ring and .013" on the two compression. The spec is .006-.012". What the ?? Some of the new rings are only a couple thou tighter than the 80k mile ones I took out. Does anyone make anything that fits right anymore? Should I go with Total Seal? I'm sure these will work fine for a street engine but it just pi$%#* me off. US Chrome did a fantastic job so there are still some companies that take pride in their product.
Hate to say it, but that's the new normal. :-(
That oil ring end gap will be okay, it's the compression rings that need attention.
Total Seal = good company, good products
__________________
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: info@turbokraft.com
http://www.facebook.com/TurboKraft - http://www.instagram.com/TurboKraft
Old 06-08-2016, 08:39 PM
  Pelican Parts Technical Article Directory    Reply With Quote #52 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Another project way over schedule! Finally made some visible progress. I went with Total Seal rings in the 2nd groove, Goetzes top and bottom. Cam towers torqued up fine with no cam binding, nice head work by cgarr. I'm really liking the Supertec studs too. I'm presently working up my own solution to the turbo scavenge pump drive with the SC cams. Do not want to close couple and have to mod the stock oil line or have to fab a new one. All castings either bead or soda blasted and coated with matte Cerakote.



My blatant Stomski knock-offs, not as pretty but they work great and cost a total of $15 for the 46 mm socket.








Old 07-17-2016, 07:19 PM
  Pelican Parts Technical Article Directory    Reply With Quote #53 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
SC cams turbo pump drive







I need three M6 x100 socket head screws and cut a couple gaskets. Maintains the original position of the pump so no modding the original plumbing.
Old 07-23-2016, 12:56 PM
  Pelican Parts Technical Article Directory    Reply With Quote #54 (permalink)
Registered User
 
lite75's Avatar
 
Join Date: Jan 2007
Location: Bellingham WA
Posts: 807
Garage
Looking good!
__________________
75 930, 76 930, 83 SC EFI turbo
Old 07-23-2016, 01:10 PM
  Pelican Parts Technical Article Directory    Reply With Quote #55 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
Thanks!
Old 07-23-2016, 06:09 PM
  Pelican Parts Technical Article Directory    Reply With Quote #56 (permalink)
Registered User
 
proffighter's Avatar
 
Join Date: Aug 2007
Location: Switzerland
Posts: 2,178
Garage
Sorry I don't get it: Why such a huge spacer for the pump? Don't trust those long bolts at all. The may fail after a while.

My solution:



Just thick enough to get the drive pin in the right position:

__________________
Roland

930 Turbo '81 Too many modifications to list
Old 07-24-2016, 01:08 PM
  Pelican Parts Technical Article Directory    Reply With Quote #57 (permalink)
Registered User
 
proffighter's Avatar
 
Join Date: Aug 2007
Location: Switzerland
Posts: 2,178
Garage
Here measurements to evaluate spacer thickness:

__________________
Roland

930 Turbo '81 Too many modifications to list
Old 07-24-2016, 01:10 PM
  Pelican Parts Technical Article Directory    Reply With Quote #58 (permalink)
Registered User
 
Join Date: Jan 2015
Posts: 1,265
As I said - "Maintains the original position of the pump so no modding the original plumbing." I don't want to fab new plumbing or mod the original plumbing.
Old 07-24-2016, 05:23 PM
  Pelican Parts Technical Article Directory    Reply With Quote #59 (permalink)
Registered User
 
TurboKraft's Avatar
 
Join Date: Mar 2005
Location: Phoenix, AZ
Posts: 2,343
No mods to the plumbing should be necessary running without the spacer.
Oil return line to the tank is unchanged.
Scavenge hard pipe will extend 1" further aft, but if you're using headers then you will be using a flexible 8AN line from the drain can to the hard pipe anyway. Non-issue.
__________________
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: info@turbokraft.com
http://www.facebook.com/TurboKraft - http://www.instagram.com/TurboKraft
Old 07-25-2016, 10:37 AM
  Pelican Parts Technical Article Directory    Reply With Quote #60 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 10:54 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2016 Pelican Parts - 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.