It is, we have a hollow version for racing, standard is made of magnesium. Again, the blower is huge, 9.8 liter if male driven, 13 liter if female driven.

Keith,

Actually you started this while I tried to give you answers, as well as others. You've been asking the same questions for nearly 5 years now, yet you haven't bought a single item from me. If I remember correctly, you were telling me how fantastic the PSI were about 5 years ago in Miami and I told you then, as I told you now, there are many problems, but they make peak HP. I think you found that out.

And again, I don't build boats and I'm not in charge of testing boats. If you really want to get info, call Bob Teague. The boat went the same speed @ 6500 feet as it did at sea level. Pretty simple. Is it silly to bring a boat with the wrong gear ratio? Yes, of course, but it's not my call and not my nickel. If you doubt any part of that boat, talk to the people that were part of it. It's extremely insane to think the supercharger has anything what-so-ever of the boats speed in that test. Just reading the article will tell you it was prepped for TAHOE. A month or two earlier, the 36 Eliminator went 169mph with the same engines.

The PSI has multiple problems, it's not a knock, it's the truth. You should know that after you were involved with the one builder who melted a few motors trying to get them right. Ask almost any engine builder that has played with them and they'll tell you there are huge distribution problems. And as any product, it takes some serious know how to get them right. There's also multiple versions, and unless you get one particular one, you'll always make less HP then the quad, 5.0 or 8.3. There are plenty of other issues that we address, that I'm not going to give the answers to here. They make great peak HP, but, there are many issues for use in marine. So if someone wants to make a wise crack and say just buy 4 of the PSI's, it's simply ignorant to act like you can just bolt them on and go. Again, you know that.

And me making claims? Seriously Keith? Our product has been proven time and time again. If you got some real questions, call and talk to some of the engine builders that have used them and tested back to back. Bob Teague, Gary Teague, Tommy Hofstetter, Paul Pfaff, Richie Zul, Joey Griffin.....I can stand behind every claim, always have. You seem to keep misreading everything posted and are stuck on 200hp (read every post, it depends on entire package). I've never claimed some MPH, I deal in POWER, thats what I do, thats what I sale. Nobody ever said every motor makes 200hp more nad thats 20mph, so I never claimed that. I gave facts on multiple applications and the results on the dyno. Because it's there boats and they drive the boats, I can't give back-to-back test results.

As I've told you before, and you just don't seem to get it, every motor is different, as is every roots type supercharger from different mfg's. You got Blower Shop, Littlefield, Mooneyham, Kuhl, BDS, Weiand, B&M.... Each is different, and not one of them compete with a screw type supercharger of equal size, that is a fact. Not only that, many are not held to tight tolerances so they very from unit to unit. Some are better than others, some lose performance over time, etc. Then, as I said before, it depends on the package. What if your running a 1071 on a 540, dart heads, solid roller cam, but your only running 2psi of boost? Putting a screw on isn't going to make 200hp more at 2psi, since the original blower isn't doing squat (little temp increase and low parasitic losses). But same motor, is running 15psi of boost with a 1071 with no teflon, standard opening and discharge, no offset, then you put the 5.0/8.3 on and it will make 200+hp at 15psi! It's pretty simple.

Example, a PSI 1471 roots supercharger, 60deg helix takes approx. 700hp to turn @ 55psi of boost @ 8000 engine rpm. The A980 takes 400hp! Thats 300 less just with parasitic losses, before temperature, air density, distribution, etc. is added to the equation. In the end, it's nearly 600hp on a top fuel motor, but they're banned from top fuel so it doesn't matter.

Back to your boat, why don't we stick to motor info, since thats where my speciaties lie. You keep going back to your boat, but I don't build boats Keith, please understand that. Is your boat setup identical to the other race boats? Your X dimension identical? Is your CG identical? Is the boat weight identical? Width, height of the sponsons? Tab, prop, engine placement? If so, thats great, then you mirror everything they have and should in theory get identical results. Therefore, motor data will then give you the X of your equation. So again, answer this: CI, cam lift, duration, lobe centerline, how it's setup (advanced, retarded), head size (runner and combustion chamber), porting?, manifold type, is it port matched, intercooler type, carb size and flow numbers if they've been flown, carb adapter, engine rpm you wish to compare, boost currently running, total advance, octane.

If there are complaints about our warranty, then I don't know about it. Its pretty simple, 1 year from ship date unless the parts are used in a manner in which we do not support, which is rare, but possible, which we explain to the customers first hand. Then kits don't work? Are you refering to ours? We didn't get to where we are by selling sh*%.

I've heard of people having fuel distribution issues with the PSI's, but our PSI's have even fuel distribution. Almost dead even egt's.... We only spent about a days worth on the dyno. Alot of it has to do with having a good manifold. We run a blowershop manifold and a copper (single core, but just slightly bigger than a Lee style single core) intercooler that we built.

PSI has nothing to prove and Ronnie Sporl hurt engines trying to run without intercoolers.
We could go back and forth till blood runs from my fingers.
By the way it was 3 yrs ago we talked at the boat show.
I would have purchased your new 5.0s but Whipple couldn't deliver right thats why Hammer Time is running 1075 mercs.
2600 people have veiwed this post and my PM box is full with comments,that I was asked not to post.I havent purchased your product because many reasons.
Im still told that Jim Lees 46 slowed down 12 mph
It might sound like I have a hard on for you or your dads company and that couldn't be further from the truth,But I wont be a sheep and Im not stuipid.Im not stuck on 200 Hp I could give a rats A** about key board racing and what people claim they run on the GPS.
Dustin you through out the #S over the 1471 with no other specs but now when I simply ask for a comparison in any boat you bring up your not a boat builder.
If you want us as buyers to believe in your product give us some true testing on the water v bottoms and cats.No boat built that I know of will slow down with more HP.
I never said your company built Sh*t but in my business I dont knock my competition shows no class.
Im not trying to sell PSI or anyother brand but this site was not set up for a 0ne sided opinion remember the started thread was how much power could be made on 93oct.Your getting plenty free advertising I would use it wisely. Looking forward to your reply.

Hey BIG Daddy NO TESTING for PSI 1.06 efficient and build orders for 178 pieces .... Roger must be doin sumtin right designing & manufactoring to aircraft specs




How was the Party ????? Red beans rice & Hurricanes

Mike D @ STERLING does'nt seem to be having any problems with Distribution on the PSIs ... All about the right intake manifolds





Maybe Roger will chime in when he reads this thread

Wow!!

What started out as a "who can make the most horsepower on pump gas" thread, turned into a "what boat is faster" thread, and a "Bash on Dustin Whipple" thread. Dustin makes big, reliable, horsepower. He has the best record, and warantee in the marine buisness. He helps more people with questions, than I have ever seen any manufacturer do. Question?.... are there a few examples of people making more horsepower?? I am sure there are. Are they as reliable and easily duplicated? I haven't seen it. The reason so many OEM's use Dustin's product is because of reliability and the ability to replicate the product.

Thankyou Dustin... for all that you have added to our form of recreation.

Lets get this thread back to where it started. Who can make the most horsepower on pump gas?

There is a guy in the mid-west who is doing turbines on pump gas... aproximately 2500 hp. in moderate tune for a smallish turbine that will fit in a standard boat engine bay. I will try to get his website address for you guys that have all the money, and want to go really fast.

Chris

P.S. The proven formula for going really fast right now is: Big Skater Hull, Twin turbins, Arneson drives

2600 people have veiwed this post and my PM box is full with comments,

Really? Are you really that smart? Is that why they've converted many to port injection? Come on buddy, do some research before posting such a statement.