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Search took 0.15 seconds. Search: Posts Made By: Rosco_NZ
Forum: Porsche 911 Technical Forum 12-26-2025, 09:30 AM
Replies: 16
Views: 3,285
Posted By Rosco_NZ
Idle is more of a concern with carbs than MFI,...

Idle is more of a concern with carbs than MFI, but Mod-S cam
Is not that aggressive, so wouldn’t be too worried. I have heard 2.7’s are getting port restricted with 36/35 combo. If I was building...
Forum: Porsche 911 Technical Forum 11-13-2025, 11:03 PM
Replies: 28
Views: 2,583
Posted By Rosco_NZ
Need to state whether it’s a T, E or S .....

Need to state whether it’s a T, E or S .. different curves for different engines.
Forum: 911 Engine Rebuilding Forum 11-04-2025, 12:54 AM
Replies: 28
Views: 4,602
Posted By Rosco_NZ
Lake Speed Junior ‘The Motor Oil Geek’ seems to...

Lake Speed Junior ‘The Motor Oil Geek’ seems to have great insights into oils and lubrication. Apparently high calcium detergent levels reduce the effectiveness of the ZDDP. Latest theory is SP grade...
Forum: Porsche 911 Used Parts For Sale & Wanted 11-01-2025, 06:07 PM
Replies: 4
Views: 382
Posted By Rosco_NZ
Which ‘73 engine? There were at least 4 that year...

Which ‘73 engine? There were at least 4 that year ..
Forum: 911 Engine Rebuilding Forum 10-17-2025, 04:42 PM
Replies: 180
Views: 21,688
Posted By Rosco_NZ
This should be the definitive build guide for a...

This should be the definitive build guide for a Mg case engine.
Forum: Porsche 911 Used Parts For Sale & Wanted 09-27-2025, 03:55 AM
Replies: 4
Views: 305
Posted By Rosco_NZ
I know where there’s a pair .. but they’re...

I know where there’s a pair .. but they’re pricey, need refurb, runners and headrests.
Forum: 911 Engine Rebuilding Forum 09-26-2025, 12:12 PM
Replies: 55
Views: 8,087
Posted By Rosco_NZ
I was on min mains journal size and max on the...

I was on min mains journal size and max on the case so had to fit oversized mains .. the crank was ground custom on each journal to allow for shell thickness variation. Hardly ideal but you need a...
Forum: 911 Engine Rebuilding Forum 09-26-2025, 11:57 AM
Replies: 11
Views: 473
Posted By Rosco_NZ
10W might be on the thin side for an older engine...

10W might be on the thin side for an older engine at startup. 50 good for summer. Oil loses shape as it ages … keep on top of regular changes.
Forum: 911 Engine Rebuilding Forum 09-26-2025, 11:52 AM
Replies: 8
Views: 797
Posted By Rosco_NZ
I have built a 10.2:1 Mod-S MFI engine. It does...

I have built a 10.2:1 Mod-S MFI engine. It does seem to be a peach.
Forum: 911 Engine Rebuilding Forum 09-26-2025, 11:51 AM
Replies: 8
Views: 797
Posted By Rosco_NZ
I’m intrigued how 95mm pistons fit cylinders that...

I’m intrigued how 95mm pistons fit cylinders that slip into 97mm case holes without weakening the case land too much … I trust if Henry says it’s a good solution .. but don’t get how it fits
Forum: 911 Engine Rebuilding Forum 09-12-2025, 12:53 PM
Replies: 7
Views: 268
Posted By Rosco_NZ
I would just go with 1-2-3, strong reliable...

I would just go with 1-2-3, strong reliable ignition is key to a good engine. 123 will enable tuning your engine much more easily than distributors with springs. Not to mention bush / shaft wear. If...
Forum: 911 Engine Rebuilding Forum 09-08-2025, 11:51 AM
Replies: 12
Views: 566
Posted By Rosco_NZ
Mine originally came in at .85-.9mm. Thicker base...

Mine originally came in at .85-.9mm. Thicker base gaskets took it out to 1.1-1.15mm. Runs strong with 10.2:1 CR. 1.5 seems a bit much.
Forum: 911 Engine Rebuilding Forum 09-08-2025, 11:45 AM
Replies: 4
Views: 259
Posted By Rosco_NZ
Your engine is a SS 2.0, 80x66 mm crank. Yes,...

Your engine is a SS 2.0, 80x66 mm crank. Yes, 81mm and higher compression would be a nice upgrade. But keep an ear out for pinging, you might need to run better gas.
Forum: Porsche 911 Technical Forum 09-03-2025, 02:28 AM
Replies: 5
Views: 255
Posted By Rosco_NZ
Some are of the opinion the early system with the...

Some are of the opinion the early system with the seperate voltage regulator is better, as it’s not exposed to heat and breakdown. I rebuilt mine (bearings and new carbon bushes) and had the...
Forum: Porsche 911 Technical Forum 08-31-2025, 04:38 AM
Replies: 34
Views: 2,884
Posted By Rosco_NZ
Wow! What do you make of this Henry Schmidt?

Wow! What do you make of this Henry Schmidt?
Forum: 911 Engine Rebuilding Forum 08-20-2025, 12:45 PM
Replies: 8
Views: 707
Posted By Rosco_NZ
I understand the 2.1 turbo RSR was built on Mg...

I understand the 2.1 turbo RSR was built on Mg cases (& 915 trans). I know these days we know the limitations but weren’t the 2.8 RSR’s also Mg cases?
Forum: Porsche 911 Used Parts For Sale & Wanted 08-14-2025, 01:29 AM
Replies: 10
Views: 1,166
Posted By Rosco_NZ
This is for LWB?

This is for LWB?
Forum: Porsche 911 Used Parts For Sale & Wanted 08-14-2025, 01:22 AM
Replies: 4
Views: 149
Posted By Rosco_NZ
WTB - 2.7 Rear Decklid Badge

Does anyone have a nice one in their parts stash?
Forum: 911 Engine Rebuilding Forum 08-12-2025, 05:38 PM
Replies: 177
Views: 10,669
Posted By Rosco_NZ
I’m in the process of building a twin plug...

I’m in the process of building a twin plug distributor using a Marelli body … will post some progress updates in another thread
Forum: 911 Engine Rebuilding Forum 08-12-2025, 01:39 PM
Replies: 64
Views: 3,614
Posted By Rosco_NZ
Just a thought .. check the rocker shafts are...

Just a thought .. check the rocker shafts are being correctly located on installation .. if the rocker runs misaligned on the shaft where the shaft is wider due to expansion nuts, this could cause...
Forum: 911 Engine Rebuilding Forum 08-12-2025, 01:13 PM
Replies: 64
Views: 3,614
Posted By Rosco_NZ
I thought the rocker reborn process also included...

I thought the rocker reborn process also included hardwelding … William seems to suggest this …
Forum: Porsche 911 Technical Forum 08-12-2025, 01:06 PM
Replies: 142
Views: 17,561
Posted By Rosco_NZ
I did not know that! Every day is a school day....

I did not know that! Every day is a school day. Is that only on early 7R case or did all early cases have wide spigot lands?
Forum: 911 Engine Rebuilding Forum 08-12-2025, 10:07 AM
Replies: 64
Views: 3,614
Posted By Rosco_NZ
Sounding like there may be an issue with the...

Sounding like there may be an issue with the hardness of the pad resulting from the hard welding process?
Forum: Porsche 911 Technical Forum 08-11-2025, 10:52 PM
Replies: 142
Views: 17,561
Posted By Rosco_NZ
Great! They’re rare cases. Is there enough meat...

Great! They’re rare cases. Is there enough meat on the spigot land face after machining for a good seal?
Forum: Porsche 911 Technical Forum 08-11-2025, 09:03 PM
Replies: 142
Views: 17,561
Posted By Rosco_NZ
Not using 7R cases in a 2.9 build??

Not using 7R cases in a 2.9 build??
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