Isn't there a limit to how much a supercharger is going to be able to flow? I would think that the supercharger would slow down the air (by a large amount) coming from the turbos before it gets into the engine. Seems like a cool idea but there are some bottlenecks in there for sure. I REALLY hope you follow through with this, just hope you have the resources! Good Luck!

 

what seems to be missing here is theory. you would want the s/c to be after the turbo so that you dont feed it hot air or force the intake side of the turbo. by feeding the turbo through the s/c, you would be attempting to spin the turbo faster than it was prepared too, which means the exhaust side is spinning more quickly than its mass flow would effectively be, which would result in using the s/c to pull exhaust out of the cylinders. so youre gonna have hot intake air and constant vacuum on the exhaust side until the turbo starts making more boost than the s/c. you want the s/c to be after the turbo so that it can use the instant boost to quickly add mass flow and spool the turbo. a positive displacement s/c would be best here obviously. either way, i never have agreed with the dual FI idea, think its a waste of torque running an s/c, especially with the turbo technologies these days

 

I was selling a supercharger kit for my friend, he was in an accident, blower is fine with no shaft play and was recently warrantied by vortech before accident, main bracket is bent but I am sure you can fix it scott

He will sell it cheap let me know if you are interested.

 

This would be a lot better with a roots blower. The instant power hit from the roots blower is the gain you're going to be after, not just the amplified boost levels. Plus, you don't really have to modify anything other than your hood. The twin turbo kit will bolt right up to the roots blower.

Running boost into the turbo compressor would also concern me because it would push it past the turbo's intended flow characteristics and would either generate a ton of heat or cause it to surge.

That brings us back to step 1, becuase the stillen supercharger is weak and will be majorly underwhelming for this type of setup. It would be best to find a monster roots blower like the car in the turbo mag link.

 

lol, ya after i wrote that i figured out my math being wrong, lol. was in a hurry.

 

unlike my first post, i realized this and corrected it later in the thread, just worded it in a way it could easily be misinterpreted.

 

Isnt this known as "Twin Charged"?

 

i think more so it is gunna be kind of a "do it and see what happens" kind of thing. especially if i really turn the boost up. i will have to put a boost gauge inbetween the turbos and blower and see what is happening there. an intake temp gauge (2 would be best) will be a must also.

 

here's a nice video of the Hellion Turbo twin turbo + stock supercharged mustang cobra.

http://www.hellionpowersystems.com/V...n.DynoDay1.wmv

 

that is inspirational! think i should give them a call.

 

honestly, that twincharged system is a joke. area under the curve>>>>>peak numbers, i thought the idea of a twincharged system was to make power early and hold it, not just make a good peak #. i would expect it to look more like an NA curve with that blower/turbo combo. not to mention 5250 redline FTMFL. however, i am pretty surprised that it makes nearly as much tq as HP, even with a tq killing positive disp. blower.

 

here's what you are missing..........you normally would have terrible drivability and/or powerband with turbos large enough to make 900+ hp on a 4.6l engine. by using the roots blower, you can spool the big turbos up alot faster and still have great drivability. if you are looking for more top end power and potential, even hellion will tell you to remove the supercharger.

also, in regards to the 5200 rpm power peak......a stock cobra peaks at 6000 rpm. look at how vqs with twin turbos react too. for example, a revup vq makes peak power at about 6300....with twin turbos on a stock motor, you peak about 5500-5800 (on pump gas.)

 

you'd be better off looking into running something like this:

http://www.supraforums.com/forum/sho...d.php?t=481292

Turbo technology is far too good to mess with the complexity of a twin F/I setup.

 

i highly doubt they were running it all the way up. that motor would have to be built to hell to handle that amount of power let alone 1600 claimed rwhp potential and handle a couple thousand more rpm.
they also stated it was fisrt street tune. hell, why am i defending a 914rwhp dyno on a twin turbo/supercharged cobra, hahhaa. seems pretty effing sick to me!! i like a linear powerband like that better also.

 

Sts

 

The dyno in that vid has A LOT of power under the curve. What did you want - 900 across the entire rev range? lol. I think there's definitely potential and lots of different/good ideas to explore posted in this thread. I like the idea of a roots type supercharger for in town driving with the top end of a big turbo. Of course sequential turbos would be a nice option for our platform also.

Go for it overzealous1!

 

if i can get the parts for what i am willing to spend on it, i will do it. i have so much custom stuff under my hood now though it will suck to have to redo a good amount of it after just finishing it and hardly any miles on it, lol.
i have a custom 3" rad with a big 16" fan on it. literally i have about 1/4" from the fan to my idler pulley. also, custom made s.s. rad hoses that will all need to be remade and all copper vacuum lines to redo.
the stillen will prolly be the best bet though to try it with.

anyone have pics of how the pullies run on the stillen? or a pic looking down the front of the motor with it installed?

 

the stillen blower is really too small. i think it is the same sized blower tht ford used to use on the early 90s Thunderbird SuperCoupes (215hp v6)

 

I did the math too......E=MC/2 x 14.7 x 7 x7 x 7 psi equals 40,000 psi of boost It should be one hell of a ride.

 

This is the correct calculation.

The mini crowd does this... You might want to check out a board for the mini cooper s... Diesel trucks do it sometimes too, in order to get massive positive manifold pressure. (Mainly people who race rigs. Those guys are nuts anyway.)

Twincharging has a lot of benefits... Basically, it is a way to get high manifold pressure with low lag. Heat will be an issue, because you wouldn't (have room to) aftercool both the turbo and supercharger.

Tuarran, compressor surge shouldn't be an issue with a twin charger... It doesn't hurt the turbo to spin forward, which is what it would do. Compressor surge is only a problem in backflow.