Going Twin screw... (?)
11-27-2006, 10:33 AM
#1
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Going Twin screw... (?)
So as most of you know I currently have a Vortech S-Trim SC which is supposedly race built by Vortech and is even louder than their "race" ones they sell off the shelf.
I made 419rwhp and 379rwtq at 8psi with it while using a AFM PowerPipe. Since my motor has decided to throw up I am going to be rebuilding it and I'm thinking about going with a twin screw style blower instead of the centrifical style. The car is mainly street driven with the occasional track day (rather go more often..). My power goals after building the new engine will be closer to 600rwhp, maybe more. I also have methanol to throw into the mix which wasn't active when I pulled those numbers.
So basically the questions are...
Since I'm rebuilding my motor what would be the best route? It's a 97 Cobra, 4.6L DOHC Teksid Aluminum block. Should I get some 03/04 Cobra heads/cams and try to piece together something made for that motor? Not sure what the best way to go about this would be.
I know the supercharger I have now is great but I'm thinking of going a different route. I actually want to quiet down the car somewhat... I'm getting rid of the Flowmasters even
I made 419rwhp and 379rwtq at 8psi with it while using a AFM PowerPipe. Since my motor has decided to throw up I am going to be rebuilding it and I'm thinking about going with a twin screw style blower instead of the centrifical style. The car is mainly street driven with the occasional track day (rather go more often..). My power goals after building the new engine will be closer to 600rwhp, maybe more. I also have methanol to throw into the mix which wasn't active when I pulled those numbers.
So basically the questions are...
Since I'm rebuilding my motor what would be the best route? It's a 97 Cobra, 4.6L DOHC Teksid Aluminum block. Should I get some 03/04 Cobra heads/cams and try to piece together something made for that motor? Not sure what the best way to go about this would be.
I know the supercharger I have now is great but I'm thinking of going a different route. I actually want to quiet down the car somewhat... I'm getting rid of the Flowmasters even
11-27-2006, 11:13 PM
#2
Ha you must be getting old, to loud. I got rid of my dumps last year and put tail pipes back on, noise was driving my crazy if I had to drive any distance. Hey do you live in Tecumseh? I thought I saw your car parked on Revland. 1 vote for Whipple/Kennebell 2.3L
11-28-2006, 03:30 PM
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Originally Posted by l8/93lx
Ha you must be getting old, to loud. I got rid of my dumps last year and put tail pipes back on, noise was driving my crazy if I had to drive any distance. Hey do you live in Tecumseh? I thought I saw your car parked on Revland. 1 vote for Whipple/Kennebell 2.3L
I'm hoping to have the car back on the road for my birthday in May... depending on how the weather is at the time. Insurance will be coming off this week once my brother's girlfriend's V6 is gone.
Garage will be getting insulated (yay) which will make working on the car in the winter so much better.
If I end up getting a better job who knows where this project will take me.
11-28-2006, 04:53 PM
#5
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Kepp your current blower. Twin screws on B headed cars such. They eliminate the crossover tube and cause heat problems. They also dont have an intercooler available. Its toobad because I would have gladly bought your SC! LOL. I just bought a Novi. IF you want to go with a Twin screw like the 03/04 which use an intercooler you cant just use the heads/intake. The timing cover is different and a few other obstacles suck as fuel system differences. Just rebuild the motor and keep the SQ!
12-03-2006, 10:53 AM
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Who is building the motor and to what specs? For 600rw+ on pump gas, you are definately going to have to upgrade to a t-trim and most likely need porting and cams to get there. Don't forget the fuel system that is going to be required to support that kind of power as well as the drivetrain necessary to put it to the ground. Moreover, what good is 600rw without the proper suspension to be able to efficiently utilize all of that power? I would not bother swapping heads and intake because KB has a new 2.1L Blowzilla for the b-heads, if you want to go that route. Goodluck, have fun and I hope you have deep pockets!
Last edited by MYSTICAL; 12-03-2006 at 10:56 AM.
12-03-2006, 05:05 PM
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Originally Posted by MYSTICAL
Who is building the motor and to what specs? For 600rw+ on pump gas, you are definately going to have to upgrade to a t-trim and most likely need porting and cams to get there. Don't forget the fuel system that is going to be required to support that kind of power as well as the drivetrain necessary to put it to the ground. Moreover, what good is 600rw without the proper suspension to be able to efficiently utilize all of that power? I would not bother swapping heads and intake because KB has a new 2.1L Blowzilla for the b-heads, if you want to go that route. Goodluck, have fun and I hope you have deep pockets!
My blower already supports 680hp stock and it is race built. I would be putting my 18psi pulley on it. I have the fuel system so that's not a problem as well as the ignition system. I have methanol injection as well. 600hp would not be a problem with my current setup.
Suspension is already mostly set up with the exception of a couple more things I will be getting. Transmission and rear end are also getting upgraded.
12-04-2006, 10:24 AM
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Make sure that the machine shop uses torque plates when honing the cylinders. Modular aluminum blocks are notorious for twisting and warping if honed without them. The service limit of the block is .030 over before it needs to be resleeved, so I would suggest going .020 the first time, allowing you to reuse the block again if need be. What compression are you shooting for? Are you doing anything to the top end?
A s-trim is a s-trim no matter what is done to it. It is designed for a stock motor and conservative boost levels. With a 18psi pulley, that blower will be over-spinning and producing a lot of heat. You are going to have to shoot a lot of meth at it in order to control the temp. Upgrading to a t-trim will be very beneficial to you.
A s-trim is a s-trim no matter what is done to it. It is designed for a stock motor and conservative boost levels. With a 18psi pulley, that blower will be over-spinning and producing a lot of heat. You are going to have to shoot a lot of meth at it in order to control the temp. Upgrading to a t-trim will be very beneficial to you.
12-04-2006, 10:59 AM
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Originally Posted by MYSTICAL
Make sure that the machine shop uses torque plates when honing the cylinders. Modular aluminum blocks are notorious for twisting and warping if honed without them. The service limit of the block is .030 over before it needs to be resleeved, so I would suggest going .020 the first time, allowing you to reuse the block again if need be. What compression are you shooting for? Are you doing anything to the top end?
A s-trim is a s-trim no matter what is done to it. It is designed for a stock motor and conservative boost levels. With a 18psi pulley, that blower will be over-spinning and producing a lot of heat. You are going to have to shoot a lot of meth at it in order to control the temp. Upgrading to a t-trim will be very beneficial to you.
A s-trim is a s-trim no matter what is done to it. It is designed for a stock motor and conservative boost levels. With a 18psi pulley, that blower will be over-spinning and producing a lot of heat. You are going to have to shoot a lot of meth at it in order to control the temp. Upgrading to a t-trim will be very beneficial to you.
The whole point of this thread was me considering getting rid of the Vortech entirely...
