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Can I over spin my supercharger Vortech V3 si from 52000 to 60,000 without any problems ??
Also I want to ask you guys if I can reach 1000 whp on my 2008 c6 z06 using C16 fuel with LS7 block with forged internals from Texas speed description as below:
( Wiseco, Diamond Racing. All pistons offered are built to accommodate LS7, and most aftermarket cylinder heads and valve configuration. All piston sets listed are 2618 forgings and feature lowered ring lands to accommodate nitrous and boost applications) ????
Can I over spin my supercharger Vortech V3 si from 52000 to 60,000 without any problems ??
Also I want to ask you guys if I can reach 1000 whp on my 2008 c6 z06 using C16 fuel with LS7 block with forged internals from Texas speed description as below:
( Wiseco, Diamond Racing. All pistons offered are built to accommodate LS7, and most aftermarket cylinder heads and valve configuration. All piston sets listed are 2618 forgings and feature lowered ring lands to accommodate nitrous and boost applications) ????
The LS7 is the worst motor to add big amounts of boost to. Sell it, build a 427 and add a YSI. You'll never see anywhere above 825rwhp with a low compression and 427 SI blower.
The LS7 is the worst motor to add big amounts of boost to. Sell it, build a 427 and add a YSI. You'll never see anywhere above 825rwhp with a low compression and 427 SI blower.
at 10 psi Im doing around 770 whp on a 3.6 inch pulley Im deciding to go 3.125 pulley to go up to 15 psi but it will over-spun my supercharger 8000 rpm more than what vortech recommends, do you think i will add power or should i sell my blower and install a v7 ysi instead and then push for 15 psi ?? at this much of boost i should do +900 whp, what do you think ??
V3 blowers aren't a fan of being over spun due the oil slinger inside the case. There are quite a few threads on here where people have done this and destroyed the slinger. If you want more power get a unit that will support your goals and make sure its oil supplied.
Also, don't focus so much on the PSI you see, but the RPM's your spinning the head unit. Remember boost is a measure of restriction. With a larger engine, good flowing heads, and a cam that works with that setup you won't see the same PSI you would on a smaller or more restrictive setup.
The LS7 is the worst motor to add big amounts of boost to. Sell it, build a 427 and add a YSI. You'll never see anywhere above 825rwhp with a low compression and 427 SI blower.
V3 blowers aren't a fan of being over spun due the oil slinger inside the case. There are quite a few threads on here where people have done this and destroyed the slinger. If you want more power get a unit that will support your goals and make sure its oil supplied.
Also, don't focus so much on the PSI you see, but the RPM's your spinning the head unit. Remember boost is a measure of restriction. With a larger engine, good flowing heads, and a cam that works with that setup you won't see the same PSI you would on a smaller or more restrictive setup.
Understood .. OK do you recommend using nitrous instead of more boost .. like a 100 shot on to of the 10 psi .. because of the blower the 100 shot will be around 150 shot so I will be around 900+ whp .. is it OK ??
Pretty sure it's the thin sleeves and what they are made out of. I have never seen a sleeve break just seen a couple drops valves and trash the block that way lol.
I've only ate up one blower out of 8 in 4 mustangs and vettes, and that was just bad luck of the blower feed getting clogged. As mentioned, the self contained units are great, but in the bigger Vortech/Paxton blowers, they use different bearings in non sl units. The thinner walls are a cause of concern to adding big boost to an LS7. Ask the top engine builders and those that have cracked the walls. You can resleave the block, but most guys sale the LS7 since it's worth a bunch and upgrade to an LSX, RHS, Dart, etc.
at 10 psi Im doing around 770 whp on a 3.6 inch pulley Im deciding to go 3.125 pulley to go up to 15 psi but it will over-spun my supercharger 8000 rpm more than what vortech recommends, do you think i will add power or should i sell my blower and install a v7 ysi instead and then push for 15 psi ?? at this much of boost i should do +900 whp, what do you think ??
I personally wouldn't put 1000hp through the stock walls of an LS7. A Novi 2200 will get you another 75-100 hp. YSI/2200R is good for another 100 more. Overspinning a self contained V3 SI on a big motor is going to build a lot of heat.
I've only ate up one blower out of 8 in 4 mustangs and vettes, and that was just bad luck of the blower feed getting clogged. As mentioned, the self contained units are great, but in the bigger Vortech/Paxton blowers, they use different bearings in non sl units. The thinner walls are a cause of concern to adding big boost to an LS7. Ask the top engine builders and those that have cracked the walls. You can resleave the block, but most guys sale the LS7 since it's worth a bunch and upgrade to an LSX, RHS, Dart, etc.
Understood .. OK do you recommend using nitrous instead of more boost .. like a 100 shot on to of the 10 psi .. because of the blower the 100 shot will be around 150 shot so I will be around 900+ whp .. is it OK ??
I don't know much about nitrous, but cylinder pressures would be my concern with the thin walled LS7 block. Not saying it can't be done and won't live, just prepare for the worst and hope for the best. I would put money toward a larger head unit if you want bigger numbers. Use the KISS methodology..... Keep It Simple Stupid.
I don't know much about nitrous, but cylinder pressures would be my concern with the thin walled LS7 block. Not saying it can't be done and won't live, just prepare for the worst and hope for the best. I would put money toward a larger head unit if you want bigger numbers. Use the KISS methodology..... Keep It Simple Stupid.
About 13 years ago I was over spinning a V1 S-trim to around 66K RPM on an LT1. No issues with Vortech reliability but I topped out at 683hp at the wheels. The midrange was strong but up top I was just over heating the air and not making anymore power.
About 13 years ago I was over spinning a V1 S-trim to around 66K RPM on an LT1. No issues with Vortech reliability but I topped out at 683hp at the wheels. The midrange was strong but up top I was just over heating the air and not making anymore power.
Get a bigger head unit.
Ran into this same issue with a Procharger P1SC-1 head unit. Spun it faster. Didn't make any more power.
If you decide to over spin it and the slinger breaks loose, you can take the head unit apart remove the slinger and convert it to oil fed. You'll have to set it up with an engine oil feed and drain and then you can spin it higher without issues. This is something Vortech isn't going to tell you. They don't want a bunch of customers bugging them about how to do it or crying because their head units broke, but what I'm telling you came directly from an engineer up there.
If you decide to over spin it and the slinger breaks loose, you can take the head unit apart remove the slinger and convert it to oil fed. You'll have to set it up with an engine oil feed and drain and then you can spin it higher without issues. This is something Vortech isn't going to tell you. They don't want a bunch of customers bugging them about how to do it or crying because their head units broke, but what I'm telling you came directly from an engineer up there.
If you decide to over spin it and the slinger breaks loose, you can take the head unit apart remove the slinger and convert it to oil fed. You'll have to set it up with an engine oil feed and drain and then you can spin it higher without issues. This is something Vortech isn't going to tell you. They don't want a bunch of customers bugging them about how to do it or crying because their head units broke, but what I'm telling you came directly from an engineer up there.
Can you expand on this? How much more can you overspin it reasonably safe after the conversion? For example, I'm running a v3 Si with a forged 346 LS6 using a stock lower and 3.4" upper A&A pulley for 12psi and 638rwhp with no meth tuned to run out to 7k RPM.
1. Which pulley do you think could be safely used to overspin the v3 Si?
2. Would meth injection make the added heat negligible?
3. What do you charge for the conversion? (Feel free to PM me)
05-22-2017, 03:20 AM
Overspin my vortech supercharger V3 SI
