XB1A- Powerdyne says it will work!!

[98GREENGLOW]

Ive spent the past 4 hours thinking about this and emailing company's. Of course I havent got any responses back from Rk sport or powerdyne or superchargers online tech yet but I dont think I really need too.

The xb1a is simply the exact same snail shell as our bd11a. EXACTLY.... The only differrance is the inside of the shell wich is gear driven vrs our belt driven system. One other differance is the xb1a will have to be tapped into the oil pan. That only cost 70$ to buy and Im sure could be done on your own or easily by a mechanic.


Another problem is that the xb1a comes with eighter a 8 or 12 pound pully that has eighther 6 or 8 grooves. We dont want grooves! We could easily just order a smooth pully with custom grooves from asp racing. In my case I would just take my 10 pound pully off my bd11a and put it on the xb1a. Problem solved.

Other than tapping the oil pan and changing the pully it would be a direct bolt on. It even has the same 90 degree outlet opening that our current bd11a has.Exactly the same!!!!!!!

Many of you may not know about the powerdyne and may be thiking OK Big Deal. The big deal is that our current bd11a can only safely make 11 pounds of boost before the inner belt and bearing will eventualy go.

The xb1a on the other hand can make up to 18 pounds of boost safely. Also pound for pound the xb1a has proven it can make more power with the same amount of boost than the bd11a. It also gives off a whine similar to that of the vortech, unlike the quieter whine of the bd11a we have.

One last thing I will address....At first I was scared it wouldnt work because I thought our impellar was actually changed on our kit to spinn backwards. However after reading the vector performance review in the forced induction guide I realized that nonthing was actually changed on the powerdyne it's self....They simply mounted the hole bd11a in a reverse fashion.....Thats why our bd11a runs off the smooth side of the belt. The reverse way that they mounted it would have ment that running thebd11a off the ribbed side of the bet would have resulted in the blower fan spinning the wrong way and air being forced out of the engine instead of forced in.

Of course most of us with the bd11a will never be able to run more than 10 pounds safely anyway....But for someone like SSM running 18 pounds of intercooled boost off a powerdyne ststem is only 2,000 $$$ and a oil tap away.

[ January 07, 2004: Message edited by: 98GREENGLOW ]</p>

[98GREENGLOW]

Sorry I forgot to mention that Im defiently not the first to mention this (Mighty THor) But it was always dismissed due to the fact that we were having a hard time to even maintain 6 pounds of boost without slippidge. So how could we even dare think of 18 pounds?????????

THOSE DAYS ARE GONE!!!!Thanks to the people on this board who tried new things. It took alot of trial and error, (overtightening belt, sand blasters , tape, sticky substances ect.) But we have figured it out....A good custom groove and john D's Power rap have made it possible for many of us to try out 9 pound pullies. Somthing that a year ago would have been unheard of.

So it is very poosible for us to get this gear driven xb1a to make some high boost. With the JohnD power rap were actually getting MORE belt coverage than many other gear driven applications that make it work. WE HAVE NO EXCUSES besides money.He he

[Arctc Wolf]

if that sc is bigger than urs, then just swaping pulleys will get you mroe boost, even tho it's the same size pulley, ur still using a bigger air compressor.

[98GREENGLOW]

No....The superchargers are identical in every aspect, shape size and color. The only differrance what so ever is that it uses gears to turn the inner pully instead of a belt to turn the inner pully. Powerdyne desighned it to be a ugrade for peolpe who want to run more than a max of 11 pounds without having to worry if the inner belt and bearings wuld break. It's the exact same thing just upgrade inner parts to be able to acheive more boost.

They basicly copied the inner votech S trim ,opened up a bd11a (the model us guys have) and then put the new gear driven pully inside and relabeled it the XB1A instead of just calling it a gear driven BD11A.

It is desighned so that if you already have the bd11a, all you have to do is take the old bd11a off your bracket and then put the new xb1a in it's place. You then tap the oil pan and thats it.

I'm still trying to call powerdyne and confirm that they are exactly the same size. If Im correct then there is no reason someone couldnt have a powerdyned v6 camaro pushin 15 pounds of boost.

Realisticaly even if they werent exactly the same size we would still have no problem making it work. As long as it fits the bracket we have so much room in front of our engine that it wouldnt even matter.

I'm pretty confident thatit is the same size though since they say it's a direct replacement and the picture looks indentical.

[Ike]

Ahh...nice form there Green...

On topic, now: But we would still need the bracket, correct? Now if there was only a way to get a copy of the bracket and a write up of the JohnD wrap we would be in business!

[98GREENGLOW]

Well yea.....For people who dont already have a charger you would have to get everything from RKsport minus the headunit. I dont even know if they will sell incomplete systems.

For us who already own the rksport bd11a kit ALL WE WOULD NEED IS THE 2000 $ XB1A HEAD UNIT AVD A 70$ OIl TAP LINE.

If I didnt already own the powerdyne I would just go with the ATI kit before I ordered parts from rksport and a head unit from powerdyne. But since I do already have all the owerdyne brackets and everything hooked up I would go with the XB1A over the ATI kit. Would save me lots of money and install would be a breeze.

I did somemore research on superchargers online.com and people who ugraded from the bd11a to the xb1a are saying they were nearly identical in size. They also said it did hook right up into all pipeing and bracketry.

Im still waiting for powerdyne to return my email I sent earlier today.

[Mighty Thor]

Green, I wouldn't be surprise if you were the first to do it. So far you've been the first on everything [img]graemlins/thumbsup.gif[/img]

Yes, this is something that we could do now and definately to be explored. The dimensions are the same and it will fit our brackets. The oil line would be the only thing to add.

As for brackets, you can take it to the machine shop and they can duplicate it.

Probably get an oil cooler. Definately get an intercooler. Also with XB-1A, there would be more parasitic lost than the BD-11A. I also heard that the XB-1A rated to go more than 18 psi.

[98GREENGLOW]

Hi Thor....Sorry but I wont be the first to do it. It just wouldnt make sense for me too right now.Im gonna be pushin the limits of my stock engine with my new 2.8 pully. Im hoping to have a steady 8-10 psi with it at all times.

BUT, it is nice too know that one day when I do build my engine I wont have to change over to a completely new turbo or supercharger thats gonna make me have to sell my powerdyne for probaly under 2 grand (unless Im lucky) and then shell out 3-5 grand for a new kit. AND THEN pay the installation price of the new kit!

With this new head unit I just pay 2 grand for a brand new one or find a used one for 1500 put it in my self and call it a day.

As far as intercooling goes I still got my heart set on the SMC alc/wat kit for this Febuary. That will be more than enough to keep my 10 pounds nice and cool. I would also use it with the XB1A. If the SMC is good enough for turboed buicks pushin 20-30 psi of boost, then it should be fine for us in the future pushin 12-16 pounds of boost.But if I do actualy get the actually Get the SMC this Feb and actually do get headers and then eventualy do build my engine all forged I would DEFIENTLY buy this headunit and then find a way to get an intercooler on there to just be safe.

SSM....Are you out there??? I know you just dropped ALOT of money but I hope you atleaste read all this. Right now Im 99 percent sure it would work. Im just waiting on some emails to be awnswered. Right now your the only one of us who could bolt this thing on and get 18 psi safely. Not to put any pressure on you but...THE HEAT IS ON.........THE HEAT IS ON.....OOOOOHHHOOOHHHHHOOOAAA........OOOOOOOHHHOOH HHHHOOOOAAA....TELL ME CAN YOU FEEL IT?....THE HEAT IS ON!!! Just kidding man. Im sure you dont just happen to have 2 g's lying around.

But someday one of us will try this.

[Rob Bell]

Before changing the Powerdyne setup to a gear-driven unit, how confident are you of the holding power of the grooved pulley and John D wrap? I thought one of the advantages of the Powerdyne was that, since it's belt-driven, it's very easy to spin. Once a gear-driven unit is installed the added drag may result in slippage again.

[John_D.]

That's one of the things I've been thinking about too. I briefly researched the xb1a a month ago, and had the same concern. Yes the increased ratio of drive pulley to impeller will spin the impeller faster using the gears, without having to worry about the internal cog belt giving out...

But, it is more drag on the drive pulley to get that extra boost, so it just depends on how much more grip we have really gotten from the new wrap + grooving the pulley.

I guess we won't know until somebody tries it.

I still keep analyzing how to mount another blower (that supports reverse rotation), so that we can use the ribbed side of the belt. I have a couple of ideas, but to carry it out I'd really be best off with a spare engine sitting around to mock up some brackets.

I've found that you can get 1/4" and 3/8" stainless plate in 12x12 sections on ebay pretty reasonably priced.... I also picked up a cheap bandsaw over the holidays, just in case I decide to try to fab up a different mounting plate.

[98GREENGLOW]

I feel very confident that we will be able to spin the xb1a for high boost with minimum slippidge. Before I even did the johnD rap I was able to get 7-9 psi for months by just doing a groove on my pully and using belt dressing. That was when there was only 35-45% belt coverage on the pully. Now the pully is covered by (estimating here) 55-75% coverage. JohnD probaly knows how much coverage were actualy getting now.

The problem with making boost down low has never been a problem for us. The problem is getting the pully to stay on when it really starts moving to higher boost numbers.The problem is that the fan will only move when the pully moves because the pully and fan are connected to the same inner belt.

On the gear driven sysyem it is harder to get the fan spinning on initial take off (somthing we shouldnt have a problem with) gut once the gears start turning they can turn the fan to speeds faster than that of the pully its self. Even if the pully were to stop, the fan would still contin2ue to move till it decided to slow down. Thats the differance to gear driven vrs belt driven. Hey JohnD please correct me if Im wrong here about the gears.

Bottom line is I beleave that it will defiently work. With just a custom groove? NO WAY!!!But with a custom groove and the johnD rap getting roughly 65% belt coverage... YES..

I havent had ant belt slippidge what so ever with the JohnD rap. I ALWAYS get 6-7 psi with out any belt dressing or tightening.

[ssms5411]

Green, my wife is already giving me hell for rebuilding the engine, but their is always next year. Sounds like a good plan though. My plan for this year is to run around 9-10 pounds and get some dyno #s and track times. Maybe a intercooler for the summer. Let me know how your smaller pulley works out, I still waiting to get mine machined.

[ssms5411]

Hey Green whats the belt length for the J.D wrap?

[98GREENGLOW]

I just used my same belt....God bless the belt tensioner. I didnt notice that I had to tighten it any more or less than the old way.

[John_D.]

<blockquote>quote:</font><hr>Originally posted by ssms5411:
Hey Green whats the belt length for the J.D wrap?<hr></blockquote>

103.5 is the easiest to install.

103 is a little harder to install but gives you more range of adjustment. With 103, you'll probably have to slide the bolt out of the tensioner pulley, route the belt over all the pulleys, then slide the bolt back through the tensioner pulley.

My Apexi Super AFC went on yesterday, so hopefully today I can do some tuning then see how much boost I'm getting on a grooved 2.75 with the new wrap... :D