Compound Boost Setup
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 162
From: Miami, Florida
You know.. I've been heavily contimplating puting this up here.. Every other time I see this happens it ends poorly in my opinion.
I'm hoping that anyone who reads my thread is one of the few people who will take it how it is and not let drama get in the way.
It's a update.. In the progession of the car. Backwards.. and then forwards.. Nothing more. No DR drama, No rain drama, no stupidity, etc. I'd like to leave it as I made a poor choice that could have been much worse and I don't blame the car, nor the rain, nor the tires.
I'd still drive on the the MTs with proper tread in light-moderate rain any time and feel perfectly safe.
The combination of the tread, and level of water on the road as well as the speed I was traveling caused the perfect situation.
The long and the short is I detailed the car last saturday, went to a show last sunday, had a great time, got caught in BUCKETs of rain at 4pm on the highway following my buddy to another show with my MT at less then 40% tread.
My buddy in his v6 with all weather tires was getting squerly on the highway going through the huge standing water puddles.
There was a construction zone and we merged to get away from the slow lane construction barrier wall which was flooded with standing water, I went over a huge dip and hydro planed, I spun left and tried to keep the spin going around but caught dry pavement and hit the center concrete wall head on at 50mph.
I'm fine now. Car will be repaired and back better then ever. I'll keep you guys updated on the progress of the repairs and mods.
If you do post plz no drama. It's just a update, nothing more.
The damage is infront of the shock towers, the front is all banged up but the car starts and drives straight. Just some frame work will be needed and obviously replacing everything in that front section of the car.
Everything "Serious" looks fine, it's just all tweaked cuz of the angle of the rails now.
I've had a mod list that consisted of a lot of things that got destroyed and the car had a lot of paint damage in the front so all in all it's not that bad of a turn out for me.
I'm hoping that anyone who reads my thread is one of the few people who will take it how it is and not let drama get in the way.
It's a update.. In the progession of the car. Backwards.. and then forwards.. Nothing more. No DR drama, No rain drama, no stupidity, etc. I'd like to leave it as I made a poor choice that could have been much worse and I don't blame the car, nor the rain, nor the tires.
I'd still drive on the the MTs with proper tread in light-moderate rain any time and feel perfectly safe.
The combination of the tread, and level of water on the road as well as the speed I was traveling caused the perfect situation.
The long and the short is I detailed the car last saturday, went to a show last sunday, had a great time, got caught in BUCKETs of rain at 4pm on the highway following my buddy to another show with my MT at less then 40% tread.
My buddy in his v6 with all weather tires was getting squerly on the highway going through the huge standing water puddles.
There was a construction zone and we merged to get away from the slow lane construction barrier wall which was flooded with standing water, I went over a huge dip and hydro planed, I spun left and tried to keep the spin going around but caught dry pavement and hit the center concrete wall head on at 50mph.
I'm fine now. Car will be repaired and back better then ever. I'll keep you guys updated on the progress of the repairs and mods.
If you do post plz no drama. It's just a update, nothing more.
The damage is infront of the shock towers, the front is all banged up but the car starts and drives straight. Just some frame work will be needed and obviously replacing everything in that front section of the car.
Everything "Serious" looks fine, it's just all tweaked cuz of the angle of the rails now.
I've had a mod list that consisted of a lot of things that got destroyed and the car had a lot of paint damage in the front so all in all it's not that bad of a turn out for me.
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 162
From: Miami, Florida
Almost a month since the accident. I had a lot of plans that have drastically changed due to the accident.
The initial goal of the project was compound boost through a ported eaton and a big turbo making 800rwhp on 93 with meth and a built 4r70w.
That has now been completely scrapped and the goals of the car have been drastically altered.
The new setup is going to be based upon a new motor and a single turbo, no eaton setup.
The eaton setup was amazing for 700-800rwhp but the liter size and rotor design of the eaton is turning into a limiting factor power wise for pump gas. On E85 or race gas the eaton is still good for 1000 or more rwhp but it's just too small of a supercharger for the power goals i'm looking at.
My next goal was to strap on a 2.6-2.8l twin screw with the 78mm turbo. I contacted whipple and kb and neither brand can promise me a blower that will not blow a seal if fed with a turbo.
That was essentially the nail in the coffin of the compound setup.
So I had to figure out what I really wanted to do. I had the engine compression and leak down tested and it was great.
But 800rwhp is arguably the limit for the 03/04 internals stock. This led me to sit and really think about what I wanted to do with this car.
I spent a few days considering selling the cobra and buying a twin turbo viper. The viper platform is a much better one to build upon and offers many more options for big power.
The fact the cobra is a mustang is its greatest weakness and biggest strength.
It's after all "just a mustang". It's not very aerodynamic, the platform is old, and at the end of the day it's a v6 mustang with some emblems, a body kit, and a beastly drive chain.
But even after all those faults the parts are cheap, they can be found easily, there is a huge aftermarket and used parts surplus, and the community is huge with lots of readily available information. Add to that I know the cobra extremely well and can work on it easily.
After weighing both options I decided to stick with the cobra. That required a whole new game plan and a lot of changes to the entire car though.
Everything that I had done before that was supposed to be "plenty forever" was now going to be "barely enough".
I had to think exactly what I wanted and what was realistic to have on the street. 5000hp doesnt do you any good if you have to limit it to 1500 because of traction.
The plain and simple is the biggest limitation is traction. I barely had traction in 3rd at 700hp with 3.27 gears, a 28" tire, and the 325s ET Streets. How was I going to justify spending a ton of money making the car faster if the power was going to be useless till 4th or 5th gear?
The answer is obviously a extremely advanced boost controller. One that controls boost per rpm and gear so you can mash it in each gear and the boost ramps up and stops for each gear allowing you maximum traction at all times.
You don't need 1000hp on tap in first if you will break the tires loose with 400. But you sure do want it all unleashed in 4th.
After settling that I did some research and looking at the money I had available I decided that sticking with the 4.6L and my current turbo was going to be my best bet.
I bought a teksid block which is essentially the same block as mine, just as strong, but it's aluminum and ~75#s lighter.
The block is bored .20 and will be stroked to 5.0. The parts used to build the engine will be all over kill. The weakest link should be able to hold well over 1500hp. Everything is going to be ported and flowed. At this point the block will go before the internals.
I'm re designing the entire turbo kit. I'm having custom long tube headers made, going with a big front mount Air to Air intercooler, moving the turbo to the battery box location opposite to where it is now.
A ported 99 cobra intake is going on in place of the eaton.
For now the spec 3+, built t56, and built 8.8 are on a "wait and see what breaks first" notice. If and as they break I'll replace them. Twin disc clutch, built auto, built 9".
I had the chance to get a cage put in the car but I declined. I'm getting the rear seat delete done, battery cut off, some new gauges, and that'll be it for the interior. I want it to be as much of a street car as possible. Not a track car.
I was looking at mini-tubbing the cobra to allow for bigger rims and tires. But again it's a street car so I decided against it atleast for now. I'm just going to roll the fenders, get as wide of NT05 or equiv tires as I can and a set of 11-12" rims for the back and call it a day.
The build is currently in motion. The cobra is going on a frame machine this week, it'll be fixed and painted by the time the engine parts are here and ready in a 7-10 days.
By then the engine will come out and the new one put in shortly after.
Turbo piping fabrication and rest of the components will go on after the motor is back in and off to the dyno it goes. 4 weeks / 1 month is the plan.
Based on what I've seen and the calculations for everything on pump gas and 20#s the car should see just north of 1000rwhp with a mid-high 3000 spool up time. With meth and pump gas 1200rwhp should be attainable on the street with a push of a button.
That's the goal right now. We'll see how close we come.
The initial goal of the project was compound boost through a ported eaton and a big turbo making 800rwhp on 93 with meth and a built 4r70w.
That has now been completely scrapped and the goals of the car have been drastically altered.
The new setup is going to be based upon a new motor and a single turbo, no eaton setup.
The eaton setup was amazing for 700-800rwhp but the liter size and rotor design of the eaton is turning into a limiting factor power wise for pump gas. On E85 or race gas the eaton is still good for 1000 or more rwhp but it's just too small of a supercharger for the power goals i'm looking at.
My next goal was to strap on a 2.6-2.8l twin screw with the 78mm turbo. I contacted whipple and kb and neither brand can promise me a blower that will not blow a seal if fed with a turbo.
That was essentially the nail in the coffin of the compound setup.
So I had to figure out what I really wanted to do. I had the engine compression and leak down tested and it was great.
But 800rwhp is arguably the limit for the 03/04 internals stock. This led me to sit and really think about what I wanted to do with this car.
I spent a few days considering selling the cobra and buying a twin turbo viper. The viper platform is a much better one to build upon and offers many more options for big power.
The fact the cobra is a mustang is its greatest weakness and biggest strength.
It's after all "just a mustang". It's not very aerodynamic, the platform is old, and at the end of the day it's a v6 mustang with some emblems, a body kit, and a beastly drive chain.
But even after all those faults the parts are cheap, they can be found easily, there is a huge aftermarket and used parts surplus, and the community is huge with lots of readily available information. Add to that I know the cobra extremely well and can work on it easily.
After weighing both options I decided to stick with the cobra. That required a whole new game plan and a lot of changes to the entire car though.
Everything that I had done before that was supposed to be "plenty forever" was now going to be "barely enough".
I had to think exactly what I wanted and what was realistic to have on the street. 5000hp doesnt do you any good if you have to limit it to 1500 because of traction.
The plain and simple is the biggest limitation is traction. I barely had traction in 3rd at 700hp with 3.27 gears, a 28" tire, and the 325s ET Streets. How was I going to justify spending a ton of money making the car faster if the power was going to be useless till 4th or 5th gear?
The answer is obviously a extremely advanced boost controller. One that controls boost per rpm and gear so you can mash it in each gear and the boost ramps up and stops for each gear allowing you maximum traction at all times.
You don't need 1000hp on tap in first if you will break the tires loose with 400. But you sure do want it all unleashed in 4th.
After settling that I did some research and looking at the money I had available I decided that sticking with the 4.6L and my current turbo was going to be my best bet.
I bought a teksid block which is essentially the same block as mine, just as strong, but it's aluminum and ~75#s lighter.
The block is bored .20 and will be stroked to 5.0. The parts used to build the engine will be all over kill. The weakest link should be able to hold well over 1500hp. Everything is going to be ported and flowed. At this point the block will go before the internals.
I'm re designing the entire turbo kit. I'm having custom long tube headers made, going with a big front mount Air to Air intercooler, moving the turbo to the battery box location opposite to where it is now.
A ported 99 cobra intake is going on in place of the eaton.
For now the spec 3+, built t56, and built 8.8 are on a "wait and see what breaks first" notice. If and as they break I'll replace them. Twin disc clutch, built auto, built 9".
I had the chance to get a cage put in the car but I declined. I'm getting the rear seat delete done, battery cut off, some new gauges, and that'll be it for the interior. I want it to be as much of a street car as possible. Not a track car.
I was looking at mini-tubbing the cobra to allow for bigger rims and tires. But again it's a street car so I decided against it atleast for now. I'm just going to roll the fenders, get as wide of NT05 or equiv tires as I can and a set of 11-12" rims for the back and call it a day.
The build is currently in motion. The cobra is going on a frame machine this week, it'll be fixed and painted by the time the engine parts are here and ready in a 7-10 days.
By then the engine will come out and the new one put in shortly after.
Turbo piping fabrication and rest of the components will go on after the motor is back in and off to the dyno it goes. 4 weeks / 1 month is the plan.
Based on what I've seen and the calculations for everything on pump gas and 20#s the car should see just north of 1000rwhp with a mid-high 3000 spool up time. With meth and pump gas 1200rwhp should be attainable on the street with a push of a button.
That's the goal right now. We'll see how close we come.
Last edited by DarkDigital; May 8, 2010 at 01:53 PM.
Banned
Joined: Aug 2007
Posts: 2,463
From: AZ
NOS? Are we in fast and the furious? Lol. High boost + spray on pump gas is laughable. Why risk trying to make such high hp with **** gas? One bad batch and you're ****ed. Race gas is MORE than worth it as an insurance policy for your engine.
Thread Starter
2nd Gear Member
Joined: Feb 2007
Posts: 162
From: Miami, Florida
Last edited by DarkDigital; May 10, 2010 at 01:17 AM.
Banned
Joined: Aug 2007
Posts: 2,463
From: AZ
will do =) I mean cuz u know everything. lol.
http://www.streetfire.net/video/2003...gas_127875.htm
http://www.streetfire.net/video/2003...gas_127875.htm
Secondly, that video showed NO dyno charts. And for a reason! That car was only trapping 144. If it was really making 1000 rwhp, traps would be higher than that.
Awesome, you base all of your info off of a one off street fire video!
If ignorance is bliss, then you must be in HEAVEN!
Hell, you can't even make 1000 rwhp on a 400+ CI LSx based engine on pump gas without meth, and that's with a lot of extra cubes to help you out!
Last edited by mfj; May 10, 2010 at 12:46 PM.