Vortech power starts where?
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 800
Likes: 3
From: Port Orange FL
Vortech power starts where?
I have a vortech V-1 S trim to install on my mildly modified 94 LT1 that I can install with 42 lb injectors, blowerworks pulley wrap upgrade, and gaseous intercooler kit. The previous owner says the system made 8 lbs of boost on a stocker without these upgrades.
My question revolves around what RPM I can expect this thing to start to make serious power at? Right now my car makes 328 RWHP at 5800 RPM but doesnt really start to pull hard until the needle gets into the upper 3000 range. One of my plans for this car was to install a 2700 stall 9 inch converter into the car as well to let the motor spin up more quickly. What I am wondering however is if this is going to be a waste of money on a street tired car after I install the SC. Extra oomph wont help me if it does nothing but blow away the tires. At what RPM can I expect this basic kit to start making boost at? Can I expect this unit to make enough power at 2000 RPM to overcome traction? If so then I am not sure if it is worthwhile on what is intended to be a mildly tuned driver. I have had several smaller roots type blowers before that turned the cars into low end animals, but I am not sure at what RPM I can expect this centrifical to kick in. So my question is Converter or no converter?
Thanks
Roy
My question revolves around what RPM I can expect this thing to start to make serious power at? Right now my car makes 328 RWHP at 5800 RPM but doesnt really start to pull hard until the needle gets into the upper 3000 range. One of my plans for this car was to install a 2700 stall 9 inch converter into the car as well to let the motor spin up more quickly. What I am wondering however is if this is going to be a waste of money on a street tired car after I install the SC. Extra oomph wont help me if it does nothing but blow away the tires. At what RPM can I expect this basic kit to start making boost at? Can I expect this unit to make enough power at 2000 RPM to overcome traction? If so then I am not sure if it is worthwhile on what is intended to be a mildly tuned driver. I have had several smaller roots type blowers before that turned the cars into low end animals, but I am not sure at what RPM I can expect this centrifical to kick in. So my question is Converter or no converter?
Thanks
Roy
Melting Slicks
Joined: Mar 2001
Posts: 2,148
Likes: 302
From: Timra, Sweden
This is the compressor map for the vortech s-trim.
Boost is [pressure ratio-1]*14.7 psi.
At 25000 impeller rpm you get about 0.3*14.7 = 4.5 psi.
At 40000 impeller rpm you get about 0.8*14.7 = 11 psi.
You get the idea ...
You can use this impeller speed calulator to convert engine rpm to impeller rpm.
At 5 psi you should make about 30% more power compared to N/A.
Boost is [pressure ratio-1]*14.7 psi.
At 25000 impeller rpm you get about 0.3*14.7 = 4.5 psi.
At 40000 impeller rpm you get about 0.8*14.7 = 11 psi.
You get the idea ...
You can use this impeller speed calulator to convert engine rpm to impeller rpm.
At 5 psi you should make about 30% more power compared to N/A.
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
I run a completely stock one on my car currently. If I had my choice, I'd up it a little but not too much. Boost reinforces the torque curve too so I just wouldn't need all that much converter for putting around on the street. I can't hook up as it is on the street. But it would help a little at the track. 60's currently are in the high 1.60's.
