4.0-4.5 big bore
08-23-2023, 05:44 PM
#16
Flat Six Innovations will be holding their quarterly (free) 9A1 Technical Webinar in a couple of weeks with Jake Raby. Submit a ticket at www.flat6innovations.com to be invited
Since the 18 month long LN/ FSI technical merger was completed in July things have settled down to a normal pace and FSI has began accepting 9A1 work again. The 9A1 work (and all other new work) was suspended in February of 2022 so the backlog could be worked away to facilitate the merger. The dust has cleared, and the things that we've been collectively working on are ready to be rolled out.
Lots of exciting information will be shared in the webinar, discussing what FSI has learned with the 9A1 program dating back to February of 2010 when the first 4.2L "Cayman X" was completed. The figure of 450HP was mentioned, and Cayman X was making that power in 2010. See Panorama Magazine from January 2013 (or maybe it was December 2012?) pages 66-71 for the data.
Part of the webinar touches on bigger not being better across the board, and what considerations must be made when choosing engine displacement, so power is increased across the board without compromise. Discussions concerning the SUMEbore cylinder technology that LN and FSI have developed aside from anyone else in the industry will also be discussed, and how this is now an option for the 9A1 platform, exclusively with the program. This has been a 6 year developmental project to this point, and is finally coming to fruition for production engines, being rolled out for the FSI 9A1 engines first.
@Ob917 FSI prefers to base big engines from the 3.6 variant, and have found many aspects of the 3.6 engine to be more favorable for heavier levels of modification.
Since the 18 month long LN/ FSI technical merger was completed in July things have settled down to a normal pace and FSI has began accepting 9A1 work again. The 9A1 work (and all other new work) was suspended in February of 2022 so the backlog could be worked away to facilitate the merger. The dust has cleared, and the things that we've been collectively working on are ready to be rolled out.
Lots of exciting information will be shared in the webinar, discussing what FSI has learned with the 9A1 program dating back to February of 2010 when the first 4.2L "Cayman X" was completed. The figure of 450HP was mentioned, and Cayman X was making that power in 2010. See Panorama Magazine from January 2013 (or maybe it was December 2012?) pages 66-71 for the data.
Part of the webinar touches on bigger not being better across the board, and what considerations must be made when choosing engine displacement, so power is increased across the board without compromise. Discussions concerning the SUMEbore cylinder technology that LN and FSI have developed aside from anyone else in the industry will also be discussed, and how this is now an option for the 9A1 platform, exclusively with the program. This has been a 6 year developmental project to this point, and is finally coming to fruition for production engines, being rolled out for the FSI 9A1 engines first.
@Ob917 FSI prefers to base big engines from the 3.6 variant, and have found many aspects of the 3.6 engine to be more favorable for heavier levels of modification.
I’m glad I got a 997.2 base now!
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preelude (08-25-2023)
08-23-2023, 05:46 PM
#17
Three Wheelin'
"This is no different than the M9X, where the 3.6L engines also have the best ports to modify. With those engines the (early)3.6L modified (FSI) CNC ported heads can outperform even the best 3.8L "Normal S" heads as well as the 997.1 X51 heads. To date the strongest R43 @4.3L made 482HP at the crankshaft and utilized early M96.05 (997.1 base) cylinder heads. This outperformed the most recent R43 that was based from a factory 997.1 X51, using modified heads."
ooooh Baby -- saving my $$ for this
ooooh Baby -- saving my $$ for this
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08-23-2023, 08:18 PM
#18
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Thread Starter
This thread is getting good!
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EVOMMM (08-24-2023)
08-25-2023, 09:56 PM
#19
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08-30-2023, 12:34 AM
#20
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Thread Starter
Can somebody tell me if or why not or if the Deman guys would or do build a 4.5 out of a 997.2 ? I’ve seen their pricing etc and I’m in. I have not called those guys. Does anybody here have some info? Why are they just cayman and Boxster specialists?
Last edited by Ob917; 08-30-2023 at 12:37 AM.
08-30-2023, 07:48 AM
#21
Rennlist Member
another shop that he fixed.
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Ob917 (08-30-2023)
08-31-2023, 11:00 AM
#22
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Some pros, but after modification there's more cons. The X51 engines work most efficiently in stock displacement. It is pretty easy to turn one of those combinations upside down thinking bigger is better.
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Ob917 (08-31-2023)