Like I said, I'm not going to argue about roots style blowers since they are old news. Eaton are roots style blowers. They are just a little updated. The original roots blowers such as those from Camden and Weiand are 2 lobe, straight rotors. The Eaton are a little updated since they are 3 lobe twisted rotors. This helps noise but also increases efficiency a little. Then again, what doesn't when it comes to these? They recently acquired the rights to build a twin screw but as of yet are not making them for the aftermarket. They are building them for the Ford GT however. Your comparison numbers between the Eaton roots and centrifugal are about what I would expect. With an efficency that low, the centrifugal would acutally pass it fairly low in the powerband. I am just partial to twin screws since in my opinion they are the only valid form of positive displacement supercharging. I am not a fan of centrifugals at all since I believe the twin screw to be more funtional. I do like the idea of the axial flow. Face it, everyone loves jet engines! These look like the compressor stage of a jet. The efficiency is also really high on them and they don't require alot of power to turn. Since you are comparing yours to the Eaton kits, I will agree that the centrifugal make far more power. I don't know why anyone uses roots anymore besides the obvious racing classes where that is all that is allowed.

I'm not trying to insult you by implying that you are only doing this for cost reasons. Please understand that there is always someone new that claims to have a better, cheaper product and then we never see it. We have to be a little harsh to get rid of the bs people. Like I said, thankyou for wanting to give us a power upgrade. Believe me I appreciate it. I am actually grateful that you have chosen supercharging over turbos for the sole fact that everyone and their dog has one. I like things that are different. But, when it comes to supercharging, I am pretty picky.

If you do intend for the water injection system to be a supplement as it should be, just install a switch like nitrous so that you can turn it on and off when you want it. If you tuned the car right, you shouldn't have to rely on it. If you want a high end boost for say "drag racing" (remember that street racing is not condoned here), then just flip the switch to enable the system. Then again depending on how you do it, you won't need it. Are you planning to use an rpm switch or just a throttle position switch to turn on the water injection?

 

Any new info on the Sunflower RX-8?

 

I just realized that I mentioned the water/alcohol injection on the Merlin but did so in passing. In that application it was not done in passing. The reason for it is obvious, they ran 45 psi and sometimes nitrous. They were not "playing" they were fighting for their lives. And ours.
When a pilot ran into a fighting condition he wanted all the power he can get. Therefore even at low altitude there was provision for them to use the supercharge intended for high altitude, exceeding boost recomended by Rolls Royce. They would push the throtle past a stop that would break the safetywire and go into High Blower.
The mechanics would know this happened by the broken wire. Then they could replace the engine. That is if he got back.

This is also where the use of nitrous came from. So figure a 1650 cu in 12 cyld 4 valve engine running with 45 psi, nitrous, and water/alcohol injection.
That was 1942-1945. Think you have new ideas?????????

 

Nah... I dont have Sunflowers project managers email anymore.. Wish I did.

 

I was just trying in vain to return this thread to its original topic. I've e-mailed Sunflower but never gotten a response.

 

Bump from the grave....

Omi or Stealth.. anything?

 

I spoke to the larry he said the car is in california .the clucth on the car isnot working right so they are doing testings on it over there in irving california mazda .The car should be done by feb.

 

The kit they originally planned has basically been almost completely redesigned. It should be done any day, if it's not now. In fact, it may well be the finished model that's in California getting tested.

 

Has anyone contacted these guys to see how far along the development is?

 

I've tried but have never gotten a response.

 

I just got my new issue of mazda motorsport mag and Sunflower had a big article in it that said they were selling these 2004 Rx8's with the ATI Procharger kit on them. The article also said that if you wanted the kit that MC Racing just down the road from them is doing the install.

Of course we already know all of this I was just pointing out that they are still advertising this kit and that they are selling the 8's with them installed.

I am just trying to figure out why they are not publishing any kind of hp figures and pricing etc.

P.S. the article also said to go to their website www.sunflowerautomotive.com for more information........

 

Nothing there....

 

Yeah I know I already checked it out.

 

No new news I've heard either. I'll try to call my inside contact next week or so and let you all know.

 

I really don't think you are going to see this kit make it to market. This has been going on FAR too long. It's not that hard. Pettit Racing did theirs in just a little over a year. I think that Sunflower is just going to finally pull the plug. The Silver car is still sitting on their showroom floor with a sign in front of it that says the kit is "coming soon" or something to that effect.

I live about 2 miles from the dealership and would be more than happy to talk to them if you all have any other questions.

 

Still pending....

 

I know NOTHING!

Really, I have seen Canzoomers car recently, and it does NOT have the ProCharger on it anymore......so the assumption is that his part, the engine management, is done.

I won't be seeing him in person till next week, will ask if no details come out by then.

S