This Wiki is meant as a resource for people looking to understand what the real world outputs are for the Speed Six when modified.

THIS IS NOT A WILLY WAVING COMPETITION!!

Please feel free to add what you know. 24.09.13 Inspired by another members take on the figures, thought I'd add up graphs I could find showing the different curves, and hence power characteristics for people. 25.09.13 Data is transferred over to the Speed Six forum, as moderators have ignored the requests for the original thread to be moved. I hope this helps the Cerbera and Tuscan owners.

Member	Car type	Engine Size	Modifications	Output	Rolling Road	Date	Dyno graphs
clive f	Sagaris	4.0	GT cams RND,ported throttle bodies with thinned spindles, shorter inlet tract stainless steel airbox,custom injectors, lightened flywheel, decat, cross pipe, special exhaust.	417@7600rpm 340lb/ft@fly	Kits & Classics(Joolz, dyno dynamics)	Nov 2012
Don1	Sagaris	4.0	FFF, ACT airbox and exhaust,Syvecs	443.4@7400rpm 358lb/ft @ Flywheel	SRR	July 2012
Getsis	Tamora	4.5	Power 4.5, Syvecs, ACT Airbox & Blueflame, RG racing cats	394.4@6700rpm 370lb/ft (408/372 de-catted custom exhaust)	SRR (mobile RR)	Dec 2011 (Dec 2012)
DonkeyApple	Typhon	4.0	FFF, Syvecs	407.4@7700 340lb/ft @ Flywheel	SRR	Aug 2011?
jcpgasoline	Tuscan	4.5	Power 4.5, ACT Airbox & Exhaust	392.9@6200rpm 369lb/ft@5000rpm @ wheels	Power	Dec 2011
VARLEYHYD	Sagaris	4.3	STR8-Six	455BHP@6600 387lb/ft @ Flywheel	Power	Jun 2009
dvs_dave	Tuscan S	4.0	Power 4.0, decat	361@7230 285lb/ft@5470	TDI@hubs	Dec 2009
D14 AYS	Sagaris	4.5	Power SS,Decat	418.3@7200 360lb/ft	SRR	Dec 2012
rmc	T350	4.3	STR8-Six	411.81@6700 343.19lb/ft	Power@wheels	May 2010
JonRB	Sagaris	4.0	FFF2, Syvecs, injectors, Simplex Timing Chain, decat	411@??? 347lb/ft @ Flywheel	SRR	Sept 2012
ceejay's race car / kits and classics	T350R	3.6	airbox, inlets, exhaust, cam timing, total seal rings, light head porting, weber injectors, emerald ecu	395bhp flywheel 308lb.ft	dyno dynamics at kits and classics	may 2013
MrChips	Tuscan 2S	4.3	str8six 4.3, carbon airbox and trumpets, decat, ACT exhaust	410.1bhp flywheel 339lb.ft	Dyno dynamics at kits and classics	July 2013
Jay964rs	Tuscan	3.6	40.5mm inlet valves. 32.5mm exhaust valves. Different cams. Lightened/balanced crankshaft. Full rebuild with additional oil cooling.	364bhp/7000rpm flywheel 316lb.ft/5000rpm	RND	March 2014

For a direct comparison, RedSpike66's factory standard 4.0 Sagaris was on SRR only 15 mins before D14 AYS.

D14 AYS	Sagaris	4.5	Power SS,Decat	412.9@7200 360lb/ft	SRR	29th Dec 2011
RedSpike66	Sagaris	4.0	Decat, CliveF backbox	362.3@7000 305lb/ft@5200	SRR	29th Dec 2011

It should be noted that the SRR figures and the Power figures are within 1 bhp of each other - as shown by the only 4.5/Syvecs car. This thread shows screen shots demonstrating this. It is unknown about other dynos thus far. Therefore we can conclude that the number that Power gives 'at the wheels' are the same numbers that SRR gives 'at the flywheel'.