PSI B model Supercharger

PSI B model Screw Supercharger, aluminum ribbed case, billet rotors, complete drive snout, very nice condition, PSI distribution/restraint plate, PSI dual top carb plate, $7500.00, THANKS!

Call/Text 931-580-8804 for more information or pictures or use csmjimbkyle@bellsouth.net for e-mail-THANKS! Shelbyville, TN 37160

PSI distribution/restraint plate sold-THANKS ITA!!!
B Model PSI and drive snout $7000.00-THANKS! Jim

 

I have been asked; and no expert on PSIs, but assume it is a Gas PSI B Blower being a B model, but have a friend running a PSI B model running on alcohol and no problems after several years-ask for pictures if needed to see or determine the model-931-580-8804-Thanks!

 

Wasn't there a complete description of all PSI superchargers here a month ago ?

 

Everything, but a B Model PSI and not a lot of info about the early models that I can find-Thanks, but that discussion is still open too--- Jim

 

Billet rotors will handle any NORMAL FUEL, PERIOD.

Laminated, or aka, Segmented rotors need both the cooling effect of METHANOL over time, & its either dangerous,

or shaky at best , to run gas thru a laminated rotor style psi, which this 1 in Add IS NOT A LAMINATED ROTOR, SO ANY FUEL WILL WRK,

ON the laminated side of PSI's part numbers they made,
the glue used to keep the "muti layers of alum plates stacked & glued together, " which they look like the "paper snowflakes u made as a kid in art class,

Like when u folded up paper into a small square, then using scissors to cut shapes, notches, & v's out of it,

& then unfolding it open, to look like a snowflake, w the holes (like in a snowflake) being the litening process for keeping the rotor from being as heavy as the billet rotors are,
Cuz u cant drill in a cork screw fashion, holes, very easily, Like Norms "snowflakes" w lightening holes in each plate, stacked upon ea other to form a long rotor, then machined to look like a billet rotor till close inspection.

Glued plate edges stacked together seem to want to come apart after running gas thru them [18-23k RPMs].

Some say its strictly cooling effect of methanol that keeps the glue Norm Spec'd from breaking dwn and causong the rotor delaminating,

Some believe gasoline is the 1 fuel type that acts as a solvent to the glue, causing it to break dwn the glues adhesive quality's, & the rotor tips can start to separate at the 18,000 to 23,000rpm tip speeds a PSI ROTOR CAN SEE AT 129 O/D at high eng rpms. Some rotors have delaminated without any logical reason, some from debris going thru rotors, & some just may have not been done to Norms Stringent specs on the day it was assembled, who knows???

As for the B models in General, most were 206mm diam,
Or D rotor Diam.

The "B" screw thread is the same as a NHRA LEGAL toTOP p Alcohol D rotor screw pitch on the rotor itself, same specs,

But the B series, made mostly for off shore racing boats

( which cant carry enuff methanol to finish a race, so gas is used)

& for street cars, or any need for using gasoline, period, like street cars, ect,

These B models are 1.5" shorter in Case ID, from front face of rotors to the inside front face of blower case.

Where the standard C rotor and nhra D rotor have about 3" of space in front of the rotor faces, the B has only 1.5" of space.

Why does this matter? Because the extra space in front of the 3" version, does what Norm refers to as "Supercharging the supercharger ".

Thats why these "long case" D & C rotors benifit from the Front loader injector hats.

Dont run a front loader on a B series PSI, AS THE SPACE BEING 50%+ LESS IN FRONT OF ROTORS, WONT help with the incoming air & lack of space the funnel it into faces of screw rotor threads.

In closing, that B model is good, but your leaving about 15% on the table with the decreased space in front of rotors, over a standard D rotor blower,

where a screw likes to start bringng air into itself, which is the front of the rotors, of coarse, & so this loss of length is diminished by 50%+ as the short case is 1.5" from rotor to inside case face, & the long case ( C rotor & NHRA legal D rotor) have e" of space out front.

Norm did this 1.5" to 3" space UPGRADE to combat the whipples 600+" of swept volume, without breaking any rules. (on the D rotor), because he never made the rotor any larger in diam. Or longer in length, just gave her what she wanted, a better blow job from doubling the area in distance

He allowed the air to enter the front surface leads of the screw rotors with more volume to draw from, & thats why the orig Deep Throat hats were not Front loaders, because there wasnt enuff room for the front loader hat drsign to fill the blowers rotor needs.

Norm didnt invent the front loader, but made them possible to wrk by adding doubling the space at rotor front's surface.

Why is all this bull#$^t relevant?

Because u need to understand that EVEN as good as a 206B is BY DESIGN,

It still is dwn by about 15% @ 9500+rpms.

Because its short in front, NOT THE ROTOR LENGTH SHORT, JUST THE CASE VOLUME IN FRONT BEING SHORTER.

Run the 206B w confidence, on any fuel.

Just know its limitations,
like heavier rotors,
shouldnt run front loader inj hats on it,
& im some ( most actually) units, there Alum cases vs Magnesium, & they do not have the burst panel built into the rear cover of about 85% of the 206Bs ever made,
which is no deal breaker either, just know what your getting.

U buy "206B's" mainly cuz u wanna run gasoline w/a screw, But it will run on any fuel that a blower eng would like.
You do not buy the B's to run competitive, heads up against the "long case" , 3" front space, D & C rotors, if you can help it.
But hey, a 206B, tuned rite on methanol, will still kick serious tail over most 14/71s, so dont be to fooled cuz u dont see B's in most high end racing.

The reasons to run the B in high end racing is another chapter, im about done here with my jackazz rambling.

& BTW, THE MYTH THAT YOU CANNOT RUN NITRO THRU A PSI BLOWER IS TOTAL CRAP, ASK JOE AMATO.

HE TESTED Norms early 200C, which i own a 200H, ( the laminated version of that cast rotor 200 which is 387" of swept vol.

,& that lil bastard i got makes 100 hp per lb of boost on a 580" bbc at 20lbs of boost, FACT!
U PUT UP THE CASH, & WE WILL GO TO DYNO OF YOUR CHOICE THATS A REAL DEAL, & PLACE OUR BETS!

who can do that w a roots @20LBS??

NOBODY,

& ITS DOCUMENTED ON A KNOWN QUANTITY INERTIA DYNO THATS ACCURATE,

Amatos version was an early cast rotor on Nitro, when he tested it out, then veey quickly NHRA BANNED THE SCREW FROM FUEL CARS.

SO U CAN RUN ANY FUEL THRU A BILLET ROTOR,
AND ANY FUEL ""BUT GASOLINE""
THRU A LAMINATED Rotor safely.
U wanna try running gas thru a glued together rotor, go for it, but plan on buying a new rotor that costs more than the heads on ur eng, if you wanna prove people wrong, & try it.

The billet rotor models dont care if you use corn liquor,
its not about clearances, its about overheating the glued together rotors, cuz gas doesnt cool like alcohol does, or help draw the heat out of the rotor like methanol.

Amato never ran a laminated rotor, so the jury would be out on that till we asked Norm, if his glue would hold up or not, at say, 90% + nitro...
We know, for a fact, @ 20-45% nitro, no problem on the glued rotor, thats been tested and wrks.

I know very little about screw blowers, but own a few diff models of PSI's, & I know Norm,
& the head machinist ( the guy who gets no glory, but did all the hard wrk over a couple decades)
that made all the patterns & molds for all these diff models Norm designed.
Im just a jackazz who owns a PSI or 3.
This info, & $1.49 will get u a bottle of water at 7/11, maybe!

 

THANK YOU! so much for answering all of the questions that have been asked about B Models. Now the ITA discussions have covered all of the PSI Models and everyone has the facts now! THANKS again! Jim

 

Jim, really interesting info! I have been talking to Norm a lot and he is a really good guy answering all questions and also listen to all the things you have to say! And also he tells funny stories about things you didn't know or heard before, never talked to a guy that explains so good and doesn't get annoyed when you ask again because you didn't understand the first time! =)

 

PSI makes an adapter for the B that spaces the snout out to same distance as a D or C blower, it also let's you install the mini snout on the B.
I can send you pics if your interested. Or sell it to you.
We ran B on our small block and latest on BAE hemi.
Our B was a 1996 model and never been apart, very dependable.

 

Rickey
Id buy the extension for one of my psi's if u wanna sell it.
( as Andy & lil jerry was gonna make me one, but its reasonbly simple,
so im making cad drawings rite now ,
For the extension i need @ 1.5",

for 1 of my blowers that a short case.
I own both types, & like them all.

Contact us if u wanna sell, & we will purchase ,
Or not, & we can make 1 or pay them for 1.

Assuming price is fair and equitable to psi's or our time/materials
Thx,

We are ready to buy 1 vs building the extension, do you hav all the parts that include soacing the female spined couplers as well for atk mini snout quill length?

If its a psi brand, 99% chance jerry built it anyways,
Is yours a 6 hole version,? or 12 hole? It Could be either?
Regards
Psi jackazz

 

THANK YOU! to Metalman and Rickey for helping get the information out on the B Model PSI Screw. The evolution over the years made many changes and very hard to keep up with all of them! THANKS! Jim

 

SOLD-THANKS! Jim