Can someone explain the 997.1 engines?
11-27-2009 | 08:12 AM
#16
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From: Regretfully not at a track... :(
11-27-2009 | 04:21 PM
#17
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From: Houston, TX
Additionally to some of the other differences outlined, it is important to note that the M64 Metzger has a race style fully serviceable block, all be it at a price. The Nikasil liners are bolted in and therefore simply removed and replacable... thus no need to bore it out- replace and it's as good as new. The main benefit other than reliability for these engines was that they were designed to be stripped down and refreshed to new as required by race teams for competition rather than being made as a cast unit intended for a certain lifespan and subsequent trashed (modern engines).
Other differences:
- M64 true dry sump, external tank (as per race cars), 9A1- not dry sump, oil reservoir integrated into block, similar to wet sump
-M64 servicable bottom end- removable cylinder liners etc for stripping down, 9A1- traditional cast block with Lokasil, if rebuilding, it must be boredout- limited life for this reason esp in racing applications
-M64 proven race reliabilty (24hr enduros etc) and highly tunable- aftermarket tuning exceeding 1000bhp- main recent issue, some GT variants prone to RMS issue. 9A1- no race history therefore no comment. Not much aftermarket tuning available yet so tunability unkown
Whether the new motor will meet or exceed the standards set by thw Metzger, only time will tell but it won't be easy.
Other differences:
- M64 true dry sump, external tank (as per race cars), 9A1- not dry sump, oil reservoir integrated into block, similar to wet sump
-M64 servicable bottom end- removable cylinder liners etc for stripping down, 9A1- traditional cast block with Lokasil, if rebuilding, it must be boredout- limited life for this reason esp in racing applications
-M64 proven race reliabilty (24hr enduros etc) and highly tunable- aftermarket tuning exceeding 1000bhp- main recent issue, some GT variants prone to RMS issue. 9A1- no race history therefore no comment. Not much aftermarket tuning available yet so tunability unkown
Whether the new motor will meet or exceed the standards set by thw Metzger, only time will tell but it won't be easy.
04-13-2016 | 12:56 AM
#19
Drifting
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From: Orlando
04-13-2016 | 02:58 AM
#21
Pro
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From: Memphis, Tn
04-13-2016 | 09:12 AM
#23
Rocky Mountain High
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Many people consider it quite desirable.
04-13-2016 | 11:50 PM
#27
Racer
Joined: Oct 2015
Posts: 415
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From: Hotlanta
That's one of the advantages of a dry sump. Others include greater oil capacity and an ability to set the engine lower improving the center of gravity. You also have the risk of the oil frothing under high revs in a wet sump. You can certainly race with a wet sump engine but all things being equal a dry sump system is much better.
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04-15-2016 | 12:47 PM
#30
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From: Alabama
I like my 9A1 just as much as my Mezger. The 991 GT3 issues stem from the diamond like coating on the finger followers not holding up on earlier models. PAG is aware. Doesn't bother me as my 14 has a 100k engine warranty.