650 NA RWHP

[Viper Grenade]

Its all about head flow, stock viper heads even when ported perfectly wont be able to achieve that. Now if you get a set of Stryker heads and stuff it could be done with enough $$$.

Far as your Chevy motor comparison goes, there is no factory casting Chevy motor that will do even close to that NA. Even the LS7 seems to be about maxed at low 600rwhp range, and you are talking very very high compression motors. To achieve what you are claiming it would take an aftermarket block/heads/etc/etc.

Agreed stock gen 2 heads will not work. Ported Gen 4 heads will out flow Strykers on the hot side and just as well on the intake side.

700rwhp+ could be had in a well built N/A Viper engine. It's all there, someone just needs to build it. Didn't that TX WHO UR DADDY do close to 900rwhp, granted it was on a big stroker(542ci) and race fuel with 14.x:1 cr. That was with stock ported Gen 2 heads.

 

[mnc2886]

Has anyone done some serious testing/studying on whether a dry sump system would allow for a higher rpm range than the usual? Maybe 7500-8000 RPM. A cam with a duration/lift long/large enough to peak in that range could certainly make 700 rwhp on these engines. Just not sure if there will be adequate lubrication.

 

[Russ M]

A viper motor needs to be used like a viper motor. Keep em at their designed RPM and they will thank you by doing other near imposible things for a factory casting like making 1000hp+ with bone stock motors. Or making 2k+ hp on built stock casting motors with turbo's.

 

[DrumrBoy]

Has anyone done some serious testing/studying on whether a dry sump system would allow for a higher rpm range than the usual? Maybe 7500-8000 RPM. A cam with a duration/lift long/large enough to peak in that range could certainly make 700 rwhp on these engines. Just not sure if there will be adequate lubrication.

Thats what the GTSR engines were, dry sump + smaller main journals on the crank (+ alot of other stuff), to allow spinning above 7000. The dry sumps work great, the lighter/smaller cranks don't.

 

[Viper Grenade]

A viper motor needs to be used like a viper motor. Keep em at their designed RPM and they will thank you by doing other near imposible things for a factory casting like making 1000hp+ with bone stock motors. Or making 2k+ hp on built stock casting motors with turbo's.

If everyone thinks like you do, we'd still be on horse back.

 

[Russ M]

Go ahead and spend your $$$$ on a 8k RPM viper motor that makes 800hp, cant be all that bad if you have an extra 80k laying around to make it happen.

When your finished I promise you will get a thumbs up every time I blow past you with my bone stock motor with a few turbo's slapped on which cost me 10k complete. Hell I might even do a few circles around you while you are trying to figure out how to get to 9k RPM.

 

[Zentenk]

Go ahead and spend your $$$$ on a 8k RPM viper motor that makes 800hp, cant be all that bad if you have an extra 80k laying around to make it happen.

When your finished I promise you will get a thumbs up every time I blow past you with my bone stock motor with a few turbo's slapped on which cost me 10k complete. Hell I might even do a few circles around you while you are trying to figure out how to get to 9k RPM.

Both of you would end up doing circles around yourselves while I have traction, and no worries about breaking something.

 

[Viper Grenade]

Go ahead and spend your $$$$ on a 8k RPM viper motor that makes 800hp, cant be all that bad if you have an extra 80k laying around to make it happen.

When your finished I promise you will get a thumbs up every time I blow past you with my bone stock motor with a few turbo's slapped on which cost me 10k complete. Hell I might even do a few circles around you while you are trying to figure out how to get to 9k RPM.

I'll blow right by you when you bust 5th gear due to the tq.

 

[HLN A55]

Back on topic now, the motor has been finished and is at ART for fuel system upgrade, AEM, and various other odds and ends. We had a little set-back with the heads (made right by the machine shop), so this video is all that I have for now. It's the first attempt at break in, and you'll notice that it smoked A LOT. Turned out to be small cracks in a weld job on the heads.

http://youtu.be/FjmMJ-5ggcw

More videos and info next week once it's all wrapped up.

 

[vpower01]

I would think the motor would smoke a bit until the rings broke in anyway...im more worried why they welded the heads.
I only read this page of your post so i might have missed something.

 

[345s-bspinnin]

Glad to hear things are still moving along. The idling sounds really really good .

Hopefully you get everything sorted out and post some dyno sheets