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Old 02-18-2009, 01:09 PM
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I think it's a 710 not 725 unless they havn't updated their web site. How do they sound in a more than one setup? I never realy liked the way the Viper sounded.
Generation IV engine packages released in Miami are now a 650 V-10 & 725 V-10 up from the previous Gen III 625 & 710.

They sound like an Indy / IRL car at speed but relatively quiet when compared to a BBC.
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Old 02-18-2009, 01:13 PM
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Do you know if they have an ecm/knock sensors like the Merc so if you need gas and cant get 92 oct it will pull the timming back so you can run lower oct fuel? It's not easy to find 92 around here.
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Old 02-18-2009, 01:15 PM
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I am not positive on that. They recommend 91 & I've run 89 in my previous boat that had a pr of 625's in it.
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Old 02-18-2009, 01:21 PM
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Generation IV engine packages released in Miami are now a 650 V-10 & 725 V-10 up from the previous Gen III 625 & 710.

They sound like an Indy / IRL car at speed but relatively quiet when compared to a BBC.
SO how are they achieving the extra HP? If it's via an ECU change can the older engines be bumped up to the new standard?
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Old 02-18-2009, 01:44 PM
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I think it's a 710 not 725 unless they havn't updated their web site. How do they sound in a more than one setup? I never realy liked the way the Viper sounded.
These are new generation engines, and share almost no parts with the old ones. All are uprated by 25 hp over the previous generation: 575, 650 and 725 now. The 575 and 650 have variable valve timing, but not the 725. The previous "710" was actually a "7-10", meaning 700 hp/10 cylinders. All are built on the regular V-10 assembly line, although the 725 gets special internals. The web site is due for an update.

Can't speak for the sound, but the car suffers from only being able to hear one bank of the engine at a time. I suspect that it's better with both tailpipes pointed rearwards. Does anyone have any good YouTube links?
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Old 02-18-2009, 02:39 PM
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Haven't followed them in awhile, did they keep the variable cam timing as found in the new Vipers or lock it out? I would assume lock-out as it doesn't serve the same purpose as the automotive brothern...unless it helps with emissions.
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Old 02-18-2009, 02:47 PM
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These are new generation engines, and share almost no parts with the old ones. All are uprated by 25 hp over the previous generation: 575, 650 and 725 now. The 575 and 650 have variable valve timing, but not the 725. The previous "710" was actually a "7-10", meaning 700 hp/10 cylinders. All are built on the regular V-10 assembly line, although the 725 gets special internals. The web site is due for an update.

Can't speak for the sound, but the car suffers from only being able to hear one bank of the engine at a time. I suspect that it's better with both tailpipes pointed rearwards. Does anyone have any good YouTube links?
You can hear my 7-10 in the video section under "710 singing".

And you can it hear it start and idle as well as sruise and run as well in another video - I think I called it Uncle dave something.

Sounds like a cross between a big block chevy and a Ferrari/Lambo. Which makes sense because its right in between cylnder wise.

Sounds completely unlike the auto app- (which has not reached the 700HP threshold yet from the factory) I never did like the sound of the car.


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Old 02-18-2009, 03:24 PM
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You can hear my 7-10 in the video section under "710 singing".

And you can it hear it start and idle as well as sruise and run as well in another video - I think I called it Uncle dave something.

Sounds like a cross between a big block chevy and a Ferrari/Lambo. Which makes sense because its right in between cylnder wise.

Sounds completely unlike the auto app- (which has not reached the 700HP threshold yet from the factory) I never did like the sound of the car.


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Has anyone tried y-pipes on these?? seems like it would help the torque and the sound??
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Old 02-18-2009, 04:18 PM
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Has anyone tried y-pipes on these?? seems like it would help the torque and the sound??
Not sure-Mine have zoomers on them and they are VERY quiet.
Too many sound level tickets at the dock these days.
The engine power is rated and dyno'd with the CMI's the engine ships with.

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Old 02-18-2009, 04:23 PM
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Has anyone tried y-pipes on these?? seems like it would help the torque and the sound??

If I remember right its been done at least once. The V10s do sound great. Nice crisp revving engine.
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