Great progress, looks really clean. Very impressive!

Dave
dtinker

 

Very Awesome!!!!

 

Any new undates?

 

I can't believe I have not seen this thread...

 

No real updates. I've been working on going back to school and my machine shop is backed up to the hilt with no ETA. I'm hoping they can get around to me in the next couple of weeks before the weather breaks for the worse here in Houston!

 

Good to hear from you. I thought I would pass on just a couple of thoughts which may or may not be helpful. The intake manifold has a vacum actuator to switch from long to short runner. Is this effected by boost? Any other issues that can be cuases by boost in the vacum system? brake booster etc.? It might be easier to tune if you move the MAF to the intake side of the s/c. Also Ken Rudy of Dyno-Comp (formally of Renntech) is tuning for superchargers without the use is the AEM. He is doing all tuning in the stock ECU and has taught the stock ECU to read boost. I hope you are successful as you break new ground. I know first hand what it is like to be pioneer/guinea pig as it took over a month to get my V8 to fire up after installing it.

 

I finally have something to post! Special thanks goes out to my machinist for bumping me up on his list and making my new pulley!

Well, after close inspection I determined that I simply had to be experiencing belt slip due to the lack of belt wrap on my original setup. This was confirmed when I pulled everything off and found where the belt dust had been hiding

That said, I came to the point where it was down to fabbing up a bracket to add another idler pulley to get it to work correctly. However, that would very quickly drive up the level of complexity on top of where I already was with a custom pulley and special bearings.

So, I decided to go with my original plan of making a dual pulley for the alternator. This strategy is much less complicated overall and easier to reproduce. I did have to re-think my tensioner pulley location and the Rotrex bracket needed some additional trimming. Other then that it was fairly painless once I recieved the new pulley as shown below (compared to the stocker).



I went with a little larger diameter. The intent of this is to both increase the contact patch of the belt for the sake of grip and to underdrive the alternator. The latter is intended to help make up for turning the SC as well as to offset some of the overall load on the belt.

The bad news is that I am in Vegas this week. However, I did get her up and running before I left for a few quick drives around the block. I'll start tuning her up when I get back and see what she is going to do. I was disappointed that I couldn't put the pedal down and see what kind of boost she was going to make, but my SPD and the AEM were not in synch and I wasn't going to push it.

I ended up finding a short in one of the cables I had made due to a broken solder connection. I fixed it and confirmed that my logs were in synch and reporting the same data. However, I ran out of time before having to get ready to go out of town and couldn't take her out for another spin.

When I get back, it is time for two real tests. First, how much boost is she going to want to make now and will I have to tone it down with a restrictor? Second, will the AEM FI-6 make it into high rpms without a misfire?

I'm hoping I don't have to go to the FIC-8 as that will cause another delay, but the good news is that she is otherwise in the best shape that she can possibly be and getting even cleaner every day!

 

awesome news cant wait to see how it runs making full boost

 

Great news Web, looking forward to seeing the progress...

 

still fabing, still correcting, good for you, hopefully it will soon pay off...good luck

 

I have a quick question from those of you that have been around this forum/vehicle for a while now, how hard is it to do what he has done/is doing. There were a lot of posts commenting on how impossible of a feat this was. What is the restriction? And is the ECU the main hurdle? I have read through a lot of it but not all.... Just curious..

Edited to add the fact that he has fabricated a lot to throw at this project, so that is one limitation....

 

If you just go back to threads that are about a year or older and you will see the vast majority of people shot down ideas like boosting or swaping engines. Any of us that put these ideas out there were told to sell our car and buy an SRT. Some of us didn't listen and now a lot of progress has been made. Restrictions?? There really aren't any that knowledge, experience, learnng, expirmenting, and hard work can't solve. These cars have always been able to be boosted regardless of what people say. Kleeman has been selling their supercharger kit for the V6 for quite some time now, but some of us like to do things our own way when we can get much more bang for the buck.

 

Did you make full boost yet?

 

Any update?

 

I think the difference of opinion comes in to play when you look at $$$$$ to HP.....with price of the cars, it is sometimes possible to pick up an SRT already SC'd, for a few $$$$$ less than all the fabing, parts buying, hours of turning wrenches, and tuning that has to be done. But, as Lantana stated, if you have the knowledge, and do most of the work yourself, you come out with a unique car, with some good HP....Not putting down what people can do if talented enough, but most aren't....just my take on it...

 

Some good points... For the guys that know what they are doing, I bet they would say selling the car and buying an SRT just wouldn't be fun. You just can't replace that feeling of accomplishment when you take on a challenging project that is successful. Also I could not have sold my car and bought an SRT for what I did my V8 for. If you have to pay someone to boost the n/a V6 or do an engine swap, then buying an SRT still makes the most sense.

 

Good point Doc. I _know_ I'm not talented enough. Kudos to these D.I.Y. guys.

 

Well, everything seems to be going smooth at the moment. I've driven the car to work for the past 2-3 weeks while tweaking the fuel Map. I reconnected the O2 sensor taps to the AEM and disabled O2 correction so that I could get the base maps perfect.

I am almost there for all closed loop areas. Next up, I'll re-enable O2 correction and start playing with the voltages to get the AFR I want in the transition state from closed to open loop. I think I am also going to make things a little easier by tapping the throttle plate position rather than pedal position for injector acceleration. I'll have to experiment with this one a little to see how it works out.

Then, I can finally start some power tuning. So far so good as I seem to have conquered the 4,500 RPM cut out as well as the boost issue. It looks like I am definitely on track to utilize the inlet restrictor to limit boost when all is said and done.

The new dual pulley is performing flawlessly with no visible signs of belt wear or slippage.

Tuning has been a bit of a pain with finding the right combination of clamp voltages for the maf and the map sensors. Then, throw in the fact that on your fuel map you have negative numbers under the clamp and positive numbers above it, with weird things happening during transition, plus the funny things the ecu does with the throttle position as opposed to the pedal position keeps things very interesting. Interesting and slow but not impossible!

So, I'm still here and still tweaking. I feel like I am finally making great progress although the time I have to dedicate to this is fairly limited. That said, I am looking very forward to recording some good numbers. I can say this, the closer I get the fuel the peppier she feels all the way around! Now is the part when all the hard work really starts to pay off!

 

Great progress, sounds like you are well on your way to your goal.
Great job! I'm impressed! Once you get everything mapped out this is something you could sell. Many others would love to have that kind of power at what would be fairly economical install after you know exactly what to do and how to do it. your a very smart and persistant guy. Job well done.

 

Great to hear all the progress