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Topic ClosedPSI "Big Air Carb"

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Roland Tamaccio View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 1:48pm

... Jack, took Wifee on a trip (trk) to Niagra Falls right after 9~11. It was exactly 40 degrees all day. Left early (intentionally) afternoon and headed southeast on route 16. Near some town it starts snowing (still plenty daylight) silver dollar size flakes. Truck empty, no weight, crowned two lane, bleeding ulcer. Find out later, town was having some kind of ski festival. Just enough elevation change to grab that liquid snow from the LAKE. Got down to Cuba, New York and it's quite dangerous to try and park or turn the trk around, outside of this shop, I'am picking up at, the next morning. The guy has a yard with parking space and a loop drive way. CHAINED and locked. Only one thing to do. Got out hacksaw and let myself in. Owner shows up as cable hits ground. Glad Shirl was with me. Told him that's why I was skaird (lol). Owner is now a good friend. Oh yeah, the Canadian Mountie was very upset by Shirley videoing him on the tour bus. Like I said, about a week after 9~11. And no. I am not that cheap. Would have went to a motel after I found the shop, but  was not about to press my luck any further, that evening.

... On edit: this must have been a month after 9-11, early October.



Edited by Roland Tamaccio - 07 October 2007 at 10:18pm
... All the Federalees say,
... We could have had him, any day,
... But who would haul our aerospace freight, away.
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Marc Powe View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 2:13pm

Originally posted by jackinzoar

the 52's are what the big sleds use

Jack, with the same design that's on the link I provided (Billet bowl, V shape with horizontal ridges etc.)?  That's the one I would want for the draw/thru turbo. 

P.S.  I went by Junior Pippins shop on yesterday...........he was not there but he called about an hour after I left his shop.  He is a SUPER nice guy and chatted for about an hour.  He is gonna check around for me on the part and call me on Monday evening.  I will pick his brain about some carb tricks on the next talk.


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Tim Rinkerman View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 2:50pm
I read the spec's and looked at all the tuning info on the PSI website. It is a really,really nicely made and well thought out piece. It is still a Lectron, but with a "D" shaped venturi stuck to its roof. A nicely made and obviously well scienced out design.  I'm sure that's what makes it carburate smoother than a Lectron. But, if you have a 52mm. lectron, you basically have a 52mm. tube with no obstructions but the needle, in the air path. The PSI has the "vortex generator" on the roof of the throat, it has to reduce the amount of air the carb can ultimately flow, given the same bore size. Having adjustment screws for everything is a really nice feature, though,...that's probably the bucks right there....
Some's good,more's better,and too much is just right....
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Marc Powe View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 5:01pm

The one for the Harley is V shaped....look at the 3-D model.............the D shape is shown on some of the earlier snowmobile carbs with a different bowl.  They are stating that it is out flowing other carbs do to the shaping.  A bigger hole does not necessarily mean more air is flowing.  The shaping is what gets the flow.  They are saying that the shaping is causing more air speed and flow at Lower rpms and higher rpms. 

Some cylinder head guru's will ADD meat to some ports to get more flow and air speed. 


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Tim Rinkerman View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 5:39pm
I agree with you about wanting greater airspeed past the needle..the shape of the port or venturi can do that....more airspeed,more gas gets sucked up,simple physics. But, you cannot flow more anything through a tube with an obstruction in it, than you can through the same size tube with no obstruction in it.
Some's good,more's better,and too much is just right....
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Roland Tamaccio View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 8:11pm
... The ports that have material added always have some degree of bend. On the other hand carbs are almost always strait.
... All the Federalees say,
... We could have had him, any day,
... But who would haul our aerospace freight, away.
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firemanjim View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 9:37pm
I saw one of these laying on the workbench--either in our new shop or in the HD shop behind ours,will ask when I get back out there later this week and see what the concensus is from the guys trying to tune them.
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Marc Powe View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 10:49pm

Originally posted by Roland Tamaccio

... The ports that have material added always have some degree of bend. On the other hand carbs are almost always strait.

I've seen material added to the newer heads..........pretty STRAIGHT shot on them.......

Jim, let us know what you find out. 

Freddie has given us his feedback already.  I like real time information not the stuff on paper and theory.  That's for the innovator not the consumer who's getting ready to pull out his wallet......

 



Edited by Marc Powe - 08 September 2007 at 10:55pm

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jackinzoar View Drop Down
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Direct Link To This Post Posted: 08 September 2007 at 11:58pm
Roland , Cuba lake is about 25 miles southeast , welcome to snowville ,a while back someone told me it was blue sky and sunny in niagara falls , questioned why I didnt make the trip ,here the snow was falling 12" per hour , and 30 mph wind ,,,,, yep they knew what they meant calling this the "snow belt"
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Roland Tamaccio View Drop Down
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Direct Link To This Post Posted: 09 September 2007 at 9:00am

... Jack, I just retrieved some more memory. Discs are turning slower nowadays. So as the silver dollar flakes start to fall I say to Shirl, "don't worry hon, it's been forty degrees all day and the road surface is above 32 degrees. It will melt on contact". Five minutes later I started hearing, DE~de, DE~de, DE~de, DE~de, DE~de, (theme fromk Twilight Zone), in my head as there was white everywhere !!!

... And on the tour bus at the Falls, I was amazed at the concentration level of the Mountie as he looked at and questioned every passenger. He must have been tiped off that Bin Laden himself was trying to get into Canada. So he gets half way down the bus before he even notices Shirl with the video camera, and tells her she must turn it off.

... Allright back to carbs. The big armchair gurus say that air~fuel "quality" (mixture atomization) is very important. And I subscribe to this, but I keep having these nagging doubts, especially about Trons. See, I kind of think that in a Pro Stock engine with piston generated turbulance (my own opinion) with that much compression and that much piston speed the air fuel probably can't be any more mixed. So what is the reason? Well, I think it's much more important in NASCAR and NHRA superstock with one four barrel carb as poor atomization leads to uneven cylinder to cylinder distribution. Also they have much less RPM and compression. The Trons however have excellent cylinder to cylinder distribution.

... All the Federalees say,
... We could have had him, any day,
... But who would haul our aerospace freight, away.
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Kawi1500Vortex2 View Drop Down
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Direct Link To This Post Posted: 09 September 2007 at 1:54pm
Originally posted by Freddie Klies

 The poorest kind with some will behind will fashion a throne fit for a king.

huh? 

dead late don - dog house racing

"if you are really good at something, never do it for free" - the joker

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zrt1 View Drop Down
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Direct Link To This Post Posted: 23 September 2007 at 5:25pm
Ive ran a PSI genessis 995 twin in my snowmobile, JUNK. If you want PSI's stuff go to any big snow swap meet i.e. Hay days, word expo etc. and there are tons of people unloading there PSI junk. Ask any reputable snowmobile perfomance shop and I'll bet 98% will tell you that Bruce and PSI are crooks.Or search PSI in the snowest.com forum and youll get a good idea about the company. Take a look at Cutlers Performance Centers carbs www.cpcracing.com/site/256083/page/190735 , ive never ran them but I have ran there big bore kits and they beat the pants off my PSI 995. IMO

Edited by zrt1 - 23 September 2007 at 5:33pm
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Marc Powe View Drop Down
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Direct Link To This Post Posted: 24 September 2007 at 4:39pm

Russell,

Thanks for the comments and the link to the other carb. 

Marc


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jackinzoar View Drop Down
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Direct Link To This Post Posted: 24 September 2007 at 4:41pm
talked with Dan Norlin this weekend , hes thrilled with his PSI carb , he states facts on the PSI website about his personal experiance
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zrt1 View Drop Down
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Direct Link To This Post Posted: 25 September 2007 at 9:28pm
I hope they work out. I dont mean to vent and bash PSI so bad but I and a few friends have spent a ton of money with Bruce and have been let down every time (ive still got friends that are waiting for pistons for about a year now. siezco wont release them to anyone because there a special piston for PSI)  I dont know much about Cutlers carbs but Dale Cutler has gone far and above anyone as far as any tech help.
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Marc Powe View Drop Down
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Direct Link To This Post Posted: 25 September 2007 at 11:03pm

Russell,

We are sorry to hear you have had problems with PSI however we just want to stick to the subject on whether or not the carb is any good.

Thanks........

Marc


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Kawi1500Vortex2 View Drop Down
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Direct Link To This Post Posted: 25 September 2007 at 11:40pm

its funny...

someone fast shows up with a new part on their bike and everyone wants it

is THAT what makes them fast?  i dont know

then on the other hand you can build someone the best motor out there and because they are not tuners your motor building skillz suck

that can happen easily with carbs as well

dead late don - dog house racing

"if you are really good at something, never do it for free" - the joker

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Freddie Klies View Drop Down
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Direct Link To This Post Posted: 26 September 2007 at 10:36am
Originally posted by Kawi1500Vortex2

Originally posted by Freddie Klies

 The poorest kind with some will behind will fashion a throne fit for a king.

huh? 

What do you not get Kawi1500Vortex?

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Kawi1500Vortex2 View Drop Down
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Direct Link To This Post Posted: 26 September 2007 at 11:02am

the middle part

no, the whole thing...

dead late don - dog house racing

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Freddie Klies View Drop Down
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Direct Link To This Post Posted: 26 September 2007 at 12:00pm
I have no idea what to reply Kawi1500Vortex2.
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