If it's any help, here is the dyno of my car running 7lbs just after I had my high-flow cats put on ....

Power / AF curves 9/18 - 323rwhp

Torque / Power curves 9/18 - 323rwhp

I am currently running the red pulley on an 04.5 and am about to switch to the gold pulley which is the supposed 7lber for an 04 but should put me up to about 8lbs (because of the highflow cats) .....

I'll dyno once I have my new suspension on and can fit on the dyno again ...

Colin

 

Are you running the stock exhaust manifolds?

 

Yes, I have stock manifolds, highflow cats and then stillen's cat back ... well, we'll see if it's lack of fuelling or temperatures, hope it's neither and I make a **** load more power ....

Colin

 

Yeah I'm gonna put the stock manifolds back on and the 8.3 lb. pulley and see what I get.

 

Where is your bung for your A/F located?
Your A/F is at 15, then it tapers to 12.
Am I reading that right? Why does it say A/F is 17.5?
That seems pretty lean to me either way.
So did you gain hp/tq from high flow cats? Hmmmmmm
Did you get a PSI reading? If so, how much boost were you at?
Most FI kits pushing 400hp HAVE to upgrade the fuel pump, what makes you think you don't need to upgrade yours? And when you do replace it, you'll probably be way over the reccomended duty cycle for that little as$ injector. So you'll have to uprgade your injector & custom retune.Is all that worth it just to have more boost on a stock block?

You may not think your pushing near 400hp because the dyno says 330 but just imagine how much hp/tq it takes to spin that SC. If someone were to log the load put on the engine from the SC, I bet in some places you'd see anywhere from 20-50hp/tq being robbed.

Instead of getting more boost, you can run with low(6-7lbs) boost & easily get away with a small shot(35hp) of n2o for just as much or less $$$$$. The n2o will richen up the mixture & cool the SC as it passes through it(2 in 1). Use an IC sprayer for your purge & cool the IC water down.

Not tryin to be an as$, just some food for thought.

 

I still think with water methanol injection could be the best and easiest solution for running the stillen with higher boost.

It cools and richens at the same time, while only coming on when on boost )4.5 psi and higher.

 

Water methanol would be great for the combustion process but you might want to consider the effects of water methanol running through the supercharger. It may cause corrosion of the lobes or bearings.

Could you inject it after the IC?

Just a thought.

 

I have run WI through a KB twin screw on my Dodge for 30k miles, it wil not harm the blower. The actual water volume is very very small , like driving though a thick fog. BTW it should be injected a few inches just before the TB.

However; the additional water injection has the effect of slightly altering the A/F ratio. You really need to tune A/F and add back some timng as well to reap the power potential of WI. I was able to add 3 psi and ~50 rwhp on a 4.7L V8 with WI and tuning on the same 91 octane and "no FMIC".

 

how is the N2O richening up the mixture? It'd lean it out unless you ran a wet shot, right?

sean

 

Yep, there is real danger of going lean in running a dry shot.

 

My thoughts exactly. The IC is very small and too thin for effective cooling of the flow. Its better than nothing though...

 

The intercooler is very small but it still brings temperatures to about 10 deg over ambient(fact). So it is quite effective.

No body uses dry shots on these cars. Dry shots need A/F tuning, then you have a dog when you're not running the n20 . You don't need to tune for wet shots unless you go over a 55 shot(then you need a little timing pulled),still no need for A/F tuning.

Water injection is a good "buffer" for more boost.It doesn't richen your A/F. Kind of like race fuel/higher octane fuel. You don't get any power from it, you just run a little cooler in your cylinders allowing for more boost(A/F tuning is required). More boost makes power.My SC'd G was a daily driver & I was always boosting around town.I would've been filling that wiper fluid everyday if I had tuned for more boost with WI.Now that I have a seperate daily driver,I can tune my TT'd G for higher boost and am considering tuning with either WI &/or 100 octane.

I'd like to see a comparison between WI on a TT/SC VQ with a stock cooling/oil system, & a TT/SC VQ with a race radiator,thermostat,oil pan cooler,& oil cooler with no WI.

 

Wes, I don't think there is a comparison there, not because they wouldn't be the same, but because you can get a full WI setup for $300. With the other route you are talking major money.

They have shown WI can reduce temps to below ambient, I'm not sure the others can get below ambient.

 

10 deg F or C over ambient?... 10’C = 50’F This is possible, but if you are saying 10’F??? ...not a chance... Maybe with ice in the glycol/water mix it could. We would need to know what the test conditions were when that value was measured.

If I had the SC myself I would surely measure it but 10 deg over ambient sounds completely unreal. There is either data error or unreal driving conditions or unreal test conditions.

Under any normal driving conditions, the glycol/water coolant itself is extremely unlikely to be within 10 deg above ambient. Note the air flow passing through the IC can never go below the glycol/water temperature. Its a law of physics. And the glycol/water can never go below ambient with any size cooler. Its also a law of physics governing this. So to say the air flow passing through the IC is only 10 deg above ambient is stretching the limits of heat exchanger efficiency and practicality. It would take massive and extremely efficient IC's and glycol/water radiators to achieve a 10 degree margin.

But I'll leave it at that without knowing what the test conditions were.



I hope to get the Stillen SC (maybe some time soon). When that happens, I'll be sure to take a whole lot of test measurements. Not for proving a point but because I would take a lot of measurements anyways for the sake of curiosity and to possibly do some R&D on the system.

 

Well I got the stock manifolds back on last night. I forgot what a pain that was. Boost definantly comes on much faster. With the 8.3 lb. pulley I saw well over 8 lbs. on my boost gauge. The car was pretty fast to begin with so I'm not sure if it "feels" any faster. Redline seems to come up even quicker than before.
Not sure when I'll be able to get back to the dyno but hopefully soon. I will keep you all posted.

 

The stillen intercooler is small, but the IC on the top of the line mercedes are no bigger. The one on the E55 is actullay a little smaller, same for the supercharged cadillacs.

It works decently, but really requires airflow. When the car is in traffic, it heat soaks very quickly.

 

Are you somehow able to plot boost Vs RPM pre/post headers? That would also be interesting to see. It would be interesting to see how that curve relates to the pre/post HP curve.

 

Unfortunately the HP/Torque graph will be the only data for comparison. Sorry I wish I could offer more info.

 

Not to hijack your thread...
I just received my Stillen Stage 2 in the mail today. Finally after a 7 week wait.

I'm thinking of installing it myself ( i'm mechanically inclined, but have not installed a SC before) Are the instructions provided sufficient for a flawless installation?

Any tips and suggestions that may come in handy from those of you who have already installed the kit?

Thanks

 

If you are mechanically inclined, go for it. There is not dyno tuning needed.

When you first turn the IC pump on, make sure you have a second person to add more fluid to the reservoir as it pumps. An air bubble can cause the pump to not work (happened to me).