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# RoW 931 porn!!! NWS warning ... (not wallet safe!)
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morghen  



Joined: 21 Jan 2005
Posts: 8210
Location: Romania

PostPosted: Mon Apr 22, 2013 1:13 am    Post subject: Reply with quote

looks great and OEMish...i'm considering copying your idea
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Sat Apr 27, 2013 3:14 am    Post subject: Reply with quote

Finally! I have a fully finished engine. The final spec includes

Omega Forged 87mm pistons
ARP conrod bolts and nuts
Lightened flywheel circa 30%
Fully balanced
ARP head studs
Stock head gasket
Enlarged head chambers and now running 8.2:1 CR
Enlarged/ported/smoothed intakes to head
New guides, seals, relapped valves
Piper Cam & vernier pulley and all timed up
Custom copper washers to ensure the spark plugs are not protruding into the head chamber to avoid hot spots/detonation
Break in oil for initial running in on the rollers for its first 2-3 hours. Then switch to its regular engine oil diet

And all for the price of a concours UK 924 turbo!! This doesn't include the cost of turbo rebuild, Zircotec exhaust coatings, engine bay repaint and other refurbishment work at the front end!

Had a long discussion regarding squish and quench of which I couldn't regurgitate the theory here. However I am satisfied that the material lost within the head chambers has been done with care and attention and shouldn't cause any issues. This is bourn by the fact that they even considered the copper washers needed to pull the spark plugs out of the chamber to avoid hot spots and therefore detonation.

It'll get fitted next week and I plan to be driving within 2 weeks barring any further delays of issues. Big annoyance is I can't get started on it until Sunday.

Crappy phone pic. Not its usual orientation!!

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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Mon May 06, 2013 1:30 am    Post subject: Reply with quote

Progress ............



New WUR location.



Manifold and turbo all lock wired. Bung fitted to enable EGT temp sensor. Nipple needs welding up and trimming back



All ship shape underneath



MoT should be OK with all new fittings



Improved fan in lieu of radiator. I want a new ally 944 turbo one in due course



Exhaust centre box delete and Zircotec'd front pipe



Will be back on it on Monday to fit intake manifold and fully plumb and wire up. Needs new fuel pipes to be made Tuesday. Looks like the key will be turned mid/late next week.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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GeorgeV  



Joined: 14 Mar 2010
Posts: 304
Location: Brisbane, Australia

PostPosted: Mon May 06, 2013 11:04 am    Post subject: Reply with quote

Looks great, it will be a shame to get all that pretty stuff dirty again.
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1981 932 with mods:
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bunta  



Joined: 21 Sep 2006
Posts: 48

PostPosted: Thu May 09, 2013 5:36 am    Post subject: Reply with quote

sorry, I may had miss a post but is this sway bar mounting original or is it an improved one ?
http://farm9.staticflickr.com/8126/8707684912_4b945cbe09_b.jpg

my 951 and 924 are not like this
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Thu May 09, 2013 5:38 am    Post subject: Reply with quote

bunta wrote:
sorry, I may had miss a post but is this sway bar mounting original or is it an improved one ?
http://farm9.staticflickr.com/8126/8707684912_4b945cbe09_b.jpg

my 951 and 924 are not like this


Stock early fitting. Updated circa 1985
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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ditch68  



Joined: 29 Sep 2008
Posts: 126
Location: Tucson, Az

PostPosted: Thu May 09, 2013 6:17 am    Post subject: Reply with quote

I cant say enough about how great your car looks!

On the topic of spark plugs and the copper washers, since you are going to this level of detail re: detonation, etc., have you indexed the plugs?

That is the use of thin shim washers to make sure the electrode of the plug is "aimed" correctly relative to the intake valves when the plug is torqued down. This can serve to produce a more uniform and efficient flame front during combustion, I am told. I recall this from back in my drag racing days with small and big block Chevy engines.

Minor detail and I dont have anything to prove effectiveness, but I figured Id mention it.

Jeff
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1979 924, all stock.
1988 951 all track modded out and angry.

Past: 1986 951, 1988 924S, 1965 912 with '69 911T engine.
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Sun May 12, 2013 7:21 pm    Post subject: Reply with quote

More progress .......

New fuel filter which is rebuildable



Dansk SS back box looks very nice on. (must run a hose over the dust under the bumper!)



And finally ..........

its all done, in, tightened, buttoned up and ready to turn the key



Still need to buy black silicone as the blue stuff just won't do. Also need some more Mikalor hose clamps in the right size. Will also get a custom length throttle cable made in due course. Despite trying to keep all the hoses and cabling tidy it still looks like a birds nest!! Needs work I think. The K&N filter will be swapped out for pipework in to the cool air where the washer bottle used to sit.

Another perspective





It will run a rebuilt Carrera GT spec K26 2660GA 6.10 turbo at circa 1.0 bar. AFR gauge, VDO boost gauge and a Phormula KS-4 knock sensor for some security. Will modify the WUR to be dual adjustable to set control pressures more easily. No idea what this spec and modifications will deliver in performance but can't wait to find out
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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Grenadiers  



Joined: 20 Feb 2007
Posts: 3222
Location: Nelson, WI & Prescott, AZ

PostPosted: Sun May 12, 2013 9:53 pm    Post subject: Reply with quote

Very very nice, congratulations! You might want to install a bolt thru the fender to support the 944 coolant bottle (on the bottom). Mine was a bit loose without it.
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mhart  



Joined: 24 Feb 2006
Posts: 170
Location: New York, NY

PostPosted: Wed May 15, 2013 2:19 am    Post subject: Reply with quote

Looks great! I think I have the same Dansk muffler on my car, it sounds terrific
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GeorgeV  



Joined: 14 Mar 2010
Posts: 304
Location: Brisbane, Australia

PostPosted: Fri May 17, 2013 4:36 pm    Post subject: Reply with quote

Congratulations on getting there, the car looks great!

On one of the earlier photos it looks like you've relocated your fuel filter from the engine bay, correct? What was the reason behind that?
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1981 932 with mods:
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Fri May 17, 2013 6:27 pm    Post subject: Reply with quote

To remove all unecessary pipework in the engine bay and make the pipe work more direct to the fuel dizzy rather than detour to the filter.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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gerben1986  



Joined: 13 Mar 2008
Posts: 232
Location: The Netherlands

PostPosted: Fri May 17, 2013 7:38 pm    Post subject: Reply with quote

Looks beautiful!

Is it correct that the spark plug (and the sparkplugwires) in a 931 are on the other side then in a 924 NA?

I see that on your picture, but I didn't mentioned it ever before.
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2022
Location: Somerset, UK

PostPosted: Fri May 17, 2013 8:00 pm    Post subject: Reply with quote

Thats correct
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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ideola  



Joined: 01 Oct 2004
Posts: 15506
Location: Woodstock IL

PostPosted: Fri May 17, 2013 10:21 pm    Post subject: Reply with quote

Simply spectacular results.

You are going to LOVE driving that thing at 1 bar. Are you getting there with wastegate spring or boost controller? Also would be interested in more details on the EGT setup (what sensor are you using, and what are you doing with its output), as well as the knock sensor (where did you locate it, what are you doing with its ouput).

Sure wish I could have seen it in person when I was across the pond a couple weeks ago!
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