Going from nothing to twin turbos as you are, with the internal wastegates, what is your cost? Are you going to list everything eventually, like parts used, sources, prices, lessons learned, et cetera?

Thanks. I'm a big fan of turbos from way, way, way back.

Russ

 

Also, with cast pistons such as we have, what boost is safe for a daily driver? I don't want to blow anything up because I got cocky with the boost situation. What can our cast pistons take without holing?

Thanks again.

Russ

 

I currently am running a Vortech @ 14psi as a daily driver... Motor is running real strong..

Our motor has been to 23psi using C16 No Lead.. This was on a motor that has seen over 50-100 passes in the 1/4 mile..

With that in mind, you know our bottom end and rods are up to the challenge.. The trick to running 14psi as a daily driver, is a good fuel system... I will also be adding a KB Boost-A-Pump to the system for insurance..

I personally will run mine anywhere from 7-9psi as a daily driver, and up to 14-16psi for competition, whenever I choose to go.. Which will not be very much.. LOL!!

I will be listing all the prices of each part once the system is complete.. I have bought quite a few parts in the last couple of days, and the small parts are the most expensive..

Here is my plan for the downpipes.. Its the absolute best option for my turbo's...




These babies will be $200 bucks apiece.. More than the Boost-A-Pump... Gaskets, studs and high temp locking nuts are expensive as well.. Like I said, its the things people will never ever consider when I post a dyno sheet, that will nickle and dime me to death.. LOL!!

But I am in it to win it.. I'll be done before summer hopefully.. Pics will be posted as progress is made..

 

Well, tomorrows purchases will bring to an end the small parts purchases... The small nickel and dime stuff, which is quite expensive has all been purchased...

Next step will be hotpipes, and our path to the intercooler.. The downpipes are orientated back towards the rear of the car, so those only need to be run individually to right in front of the rearend...

I have got the wastegates adjusted to 5psi-6psi.. I have tested these and the gates start to open at about 4.5psi.. I am sure I will adjust this later if need be.. However, on paper based on the wastegate actuator's adjusting instructions, I should be between 5-6psi at full boost.. This will be the starting point..

The Hotpipes should be completed within no more than about 10 days... Once those are in place, then I can run the oil and water lines, and plumb towards the intercooler..

I have found a place to get my hotpipes and downpipes Jet Hot coated, so thats for later...

Once the kits all installed on the car and running, I will then do a dual Fuel Pump setup, as opposed to a BAP, before upping the boost... Looks like my saftey point should be around 14psi with a good fuel delivery system.. Our goal is 400RWHP, with TQ above 400 as well...

I am hoping that with pure efficiency and fuel, I can be at 400RWHP by 12psi.. This would be 17.5HP per psi of boost...

My numbers on paper indicate this should not be a problem based on the flowrate of these turbo's in twin mode... There is tons of efficiency when coupled to the SOHC 4.0.. We will have to wait and see if this pans out.. For me personally, anything less than 400RWHP @ 12psi is not acceptable, and I will take steps at that time to reach my goal.. Timing limits for this goal are set to no more than +13-14 on 91 octane..

Most single turbo system average between 10-14HP per psi of boost.. I have enough efficiency with my twin setup I believe to capture 17.5HP per psi... My turbo's are roughly between 72-73% efficiency while at 12psi.. This should be enough to keep the boost dense enough to attain my goal..

I think I can pull it off.. We will see...

I'll keep you posted...

 

This looks like it's going to be an awesome build. Can't wait for updates!

 

Subscribed.

Looks interesting, Mike. I can't wait to see more. I got a few questions for you:

1) Are you gonna heatwrap the exposed piping under the hood?
2) What (or who) are you gonna use for tuning?
3) Other than the BAP or dual pumps, what other fuel system mods are you gonna do (bigger injectors, etc...)
4) Are you gonna keep the stock headers? I would imagine not... but what are plans for the rest of the exhaust?
5) What have you done suspension-wise in preparation, or are you just gonna deal with it as you go, as I have?

Good luck man. Keep us posted. You should have my number. Call me anytime you wanna talk.

 

Whats up Flapjack!!

Questions answered starting with #1

1. There will be no exposed hotpipes in the engine bay.. The pipes will be Jet-Hot coated

2. I will continue using the best handheld tunning device in North America which currently powers 90% of the fastest Mustangs in the United States... Its also used by 169Stang in his 9sec 05 Mustang Turbo... The Diablo PredatorSport! I may not run 9sec, but I'll be in good company!

3. I will keep the current fuel system in place at the beginning of the project based on boost level, which will start off between 5-8psi... I will increase injector size from 39lbs to 60lbs once I move to 12psi..

4. Yes, I will be starting the project off with the stock headers, so i can have a baseline performance to measure against the JBA headers later.. My kit will also bolt right up to JBA headers...

5. I will deal with it as I go.. My first order of business is raw HP and TQ.. Once I have something substantial enough, I will do suspension mods.. My car is a daily driver, so suspension is adequate for my needs... I will install LCA's and a girdle to help it out though..

How is your projects going? Hows the new Stage3 heads and Cams doing?

 

In 30 days, the 2005 S197 V6 Mustang Twin Turbo Boxster shall be born! Stay tunned for updates!

 

hmmmm... I had a Boxster... was a nice car... handle amazingly... but not nearly as fun as the Mistres...

 

Impressive. Are you going to tune it yourself, or have a shop give you a baseline tune and then tweak it from there?

 

@Scrming

Whats up man! LOL! I love the sound of Twin Turbo Boxster!

Do they even make a twin turbo Boxster? I have never seen one.. LOL!

Your car has insane handling.. I seen your video clip... It wont roll or dip at all... LOL! Nice job...

I'll have you help me with that later..

@Rygen

Obviously the tune is the very last phase... Should be real easy to tune, based on the new 05+ maf sensors stability in blow-through... Tunning Twin turbo's is no different than a single.. This is because there is only one throttlebody... Also the MAF sensor setup in a blow-through configuration will meter air just before the throttle body in a 3in tube, supported by a Diablo Mafia set to setting 5... Good for 500-600RWHP..


I doubt I will even have to tune it really hardcore, because my exisiting tune is already set to read boost... But we will do what is needed when I get to that bridge...

 

@Scrming

As I suspected.. Youtube shows 0 results for a Twin Turbo Boxster!!

Which means I can use the name afterall! LOL!

 

I admire your project but I am thinking that your goals are a little ambitious. Those are great little turbos I ran one on my old four banger a few years back. Very efficient and boost comes very early roughly same cubes/turbo so you should be seeing boost really low like around 1500-1800 rpm and before 3000 have full 10 psi with a sizeable D/P. I would assume a Mustang GT pump would simply drop in and those with a BAP can be used to 450 so you shouuld be fine with that. If going bigger the GT500 will be more than enough. I just dont think that the cubes are there to get that much hp/psi. 350 I could see. What are your current numbers with the Vortech and at what PSI?

 

My stock fuel system is the same which is used on a GT... I have 39lbs Cobra injectors, and my shorterm goal is 400RWHP by 10psi...

My initial launch of the project will start off at 6psi.. I need to make 330-350 with 6psi, in the hopes that by 10psi 400RWHP is obtainable..

Also, hopefully by getting to 400RWHP with 10psi, will remove some pressure off of the fuel system, so I can avoid a BAP..

My first option however would be Dual GT fuel pumps, and not a BAP..

I am currently running the Vortech @ 14psi which is water cooled, and places the intake chamber with 13psi of boost.. This currently has me @ 355RWHP and 338RWTQ...

I'm not happy.. I need 400RWHP and 400+ RWTQ with only 10psi..

Thanks for the feedback on the turbo's.. If I can make boost by 1500-1800RPM I can also make close to 500RWTQ.. My clutch will not like that.. LOL!

So it is wise for me to start off at only 6psi.. We'll see what happens though...

Thanks for the very good feedback.. Feel free to post more..

The installation phase of this projects starts really soon...

I am waiting on my Radiator/Swaybar delete, and 2 38mm wastegates....

Once I have those, the Vortech is coming off asap...

Not that I dont like the Vortech, I am just greedy.. LOL!!

 

Also, just so you know, my turbines are .64 AR, and will not launch until 14lbs/min..

This means that I should be at full boost around 3000-3500RPM based on my engines flow characteristics....

But I like your ambitious approach.. I hope your right...

My goal has always been to have less stress down low, to compensate for stock parts...


I am also starting out with 2.25in turbo feeders, and downpipes to increase exhaust flow velocity, and retain as much heat as possible at the turbine.. I have built in options later such as 2.5in and 3in for both feeders and downpipes...

 

just use cutout and send em out the sides, if you use vac actuated cut outs, when in boost it will flow freely. 2.25" is going to be small in my opinion, opening it up and doing it right once is the way to do it.

 

Looking good. I will stay tuned for sure.

Check your PM.

 

Cutouts were apart of the plan! But now your starting to tell some of my secrets! Thats not kool! LOL!!

In regards to the 2.25in pipes, they are a must to do first.. For many reasons, partly due to research and partly due to the modular nature of the setup...

In terms of doing it right the first time, thats exactly what I am attempting to do..

You must understand that since this is the first privatley owned twin turbo setup, I must be able to answer all questions in relation to it.. If I just slap on some 3in downpipes and go for broke, then I wont have knowledge in terms of reaction and or gains or restrictions..

Your most likley right that larger pipes will produce a better result.. However, starting from what point? If 2.25in piping can hit the marks, then anything bigger is gravy..

 

Whats up Flajack! I got your PM, and back at ya with a reply!

How is your monster V6 doing? Your already at 400RWHP, so how does it feel as a daily driver?

 

I still think a minimum of 2.5" on a turbo, the faster its out the better, even if its just to the cat. Its just me but I would hate to do my exhaust twice, good luck though and keep us posted