261 lsx v1t
Thread Starter
Staging Lane
Joined: May 2014
Posts: 61
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261 lsx v1t Hi all,
Finally built the 261ci lsx bolted the v1t too it,
We spin the engine at 6000rpm with an 80t crank pulley and 30 t blower pulley. With the step up its spinning the blower at 55200, boost is 14/15psi we're about 750hp.
My question how ever is do I need the ysi? We are maxed out on the v1t and I want more boost /power
Cheers Tom
Finally built the 261ci lsx bolted the v1t too it,
We spin the engine at 6000rpm with an 80t crank pulley and 30 t blower pulley. With the step up its spinning the blower at 55200, boost is 14/15psi we're about 750hp.
My question how ever is do I need the ysi? We are maxed out on the v1t and I want more boost /power
Cheers Tom
9 Second Club
Joined: Nov 2003
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From: Norn Iron
I'd have thought the downstroking would be a good opportunity to spin it higher ?
And how can anyone suggest what blower...when you dont say what power you have, what power you want, or what you're doing with it ?
And how can anyone suggest what blower...when you dont say what power you have, what power you want, or what you're doing with it ?
Thread Starter
Staging Lane
Joined: May 2014
Posts: 61
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As above 750 I'm asking if I need the next size up, we seem maxed out with the v1, could I spin it higher? or best just to go with the ysi? It's producing a lot of heat too would the bigger blower. Running cooler intake temps?
Not much more another 40-50 hp
Not much more another 40-50 hp
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Joined: Mar 2014
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From: Ohio
By comparison, a stock LS1 stroke of 92mm and limiter of 6200 RPM is 3742 FPM or ~62 FPS. You would have to rev your engine to 8300 RPM to see similar piston speeds as a stock LS1. You would have to rev to 10,300 RPM to see similar piston speeds as an LS7 with a stock rev limiter.
Being as how you likely have a FAR superior rod/stroke ratio and I'm guessing a custom forged crank/rod set, you should be able to shrug off 10,000 RPM assuming you can solve the valvetrain/oiling issues.
Moral of the story: You're holding yourself back.
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Staging Lane
Joined: May 2014
Posts: 61
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if if I put the ysi in with the same pulleys, it should blow more air correct? So boost higher power. Bit more?
Thread Starter
Staging Lane
Joined: May 2014
Posts: 61
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69mm crank at 6000 RPM is a piston speed of 2716 FPM or ~45 FPS.
By comparison, a stock LS1 stroke of 92mm and limiter of 6200 RPM is 3742 FPM or ~62 FPS. You would have to rev your engine to 8300 RPM to see similar piston speeds as a stock LS1. You would have to rev to 10,300 RPM to see similar piston speeds as an LS7 with a stock rev limiter.
Being as how you likely have a FAR superior rod/stroke ratio and I'm guessing a custom forged crank/rod set, you should be able to shrug off 10,000 RPM assuming you can solve the valvetrain/oiling issues.
Moral of the story: You're holding yourself back.
By comparison, a stock LS1 stroke of 92mm and limiter of 6200 RPM is 3742 FPM or ~62 FPS. You would have to rev your engine to 8300 RPM to see similar piston speeds as a stock LS1. You would have to rev to 10,300 RPM to see similar piston speeds as an LS7 with a stock rev limiter.
Being as how you likely have a FAR superior rod/stroke ratio and I'm guessing a custom forged crank/rod set, you should be able to shrug off 10,000 RPM assuming you can solve the valvetrain/oiling issues.
Moral of the story: You're holding yourself back.
cheers
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
You'd really need to consult with Vortech as to which unit would be the most efficient in terms of moving air at the rpm/boost you would end up using.
As you're sitting at a steady engine rpm most of the time, that should make it much easier to decide between them as to which compressor is easiest driven and most efficient.