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Positive Displacement Charger question
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sly
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PostPosted: Sat Mar 29, 2008 12:20 am    Post subject: Reply with quote

Steady ED wrote:
Sly, your're comparing a turbo setup that is good for 400rkw, to a centrifugal blower that can't spin over 12psi.

I was only looking for about 1/2 of that. I looked at the GT3582 / 6boost combo for early spoolup without choking off the top end. I might do it in a project car down the track, with an upgraded bottom end, and see how close to 400 I can get...it'll cost more than 10 grand but.

And the magic number is 14, not 12. I'd better stop this LOL, and positively displace myself to bed.
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badcooky
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PostPosted: Sat Mar 29, 2008 6:39 am    Post subject: Reply with quote

Grammar schmamer.
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Priestly007
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PostPosted: Sat Mar 29, 2008 8:18 am    Post subject: Re: Positive Displacement Charger question Reply with quote

[/quote]
They start "under $10,000", probably $9,995 LOL. I think that includes fitting through Repco so is a drive-in/drive-out price. 2 other tuners which have 3-letter initials starting with "BP" also do Whipple or Kenne Belle kits for the 5.4 Boss. You'll find them on AFF.

Not so sure if you're thinking retro and another Windsor.

A 10psi positive displacement setup will give you most of the 10psi from idle. If a low-boosting M90 (5? psi) can make a GM V6 deliver torque like a lazy V8, a 2.3-litre Whipple or similar will make a Boss feel like a big Cummins diesel from idle, while still playing ball right through the top end. I was just looking at a dyno chart of a BF GT fitted with the Yella Terra kit, 380rwkw and still climbing at 5800rpm.[/quote]

the workshop you're referring to would be BPT Motorsport over here in WA.... The same BPT who built my turbo eseries....
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sly
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PostPosted: Sat Mar 29, 2008 9:17 am    Post subject: Re: Positive Displacement Charger question Reply with quote

Priestly007 wrote:
the workshop you're referring to would be BPT Motorsport over here in WA.... The same BPT who built my turbo eseries....

That is correct, they are a site sponsor here... BUT I did say:
Quote:
2 other tuners which have 3-letter initials starting with "BP"

So I'm not referring to just 1 workshop. The other isn't a sponsor here, so I'll leave it at that.
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sly
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PostPosted: Sat Mar 29, 2008 9:21 am    Post subject: Reply with quote

badcooky wrote:
Grammar schmamer.



Busted LOL
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Redford
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PostPosted: Sat Mar 29, 2008 9:30 am    Post subject: Reply with quote

lol, dont you people ever sleep in on a saturday?

Kenne Belle has some really nice units but without ever checking prices i assumed they are expensive.
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Slick
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PostPosted: Sat Mar 29, 2008 10:07 am    Post subject: Reply with quote

Steady ED wrote:
hahaha, I'm just telling the truth.
Blowers with internal belt drives shred belts when you spin them too fast.
You can "aircool" them, you can run tricky belts, whatever.
It still happens.
And I think it's wrong to push them without highlighting that.


I think most of us here are aware of the internal belt drive problem. did you know powerdyne just release the new gear drive{ XB-1A } unit for the BD-10. the unit is a bolt on replacement for the current useless silent drive unit thats capable of 18psi.

there is a mob in NZ who are way ahead that makes their own gear drives for their centri chargers years ago. they flow 1950CFM, thats double or more air delivery then whats available at the moment, apart from pro-charger. I know who they are but I'm not going to spam them in here. LOL




.


Last edited by Slick on Sat Mar 29, 2008 12:39 pm, edited 1 time in total
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Grimketel
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PostPosted: Sat Mar 29, 2008 10:20 am    Post subject: Reply with quote

sly wrote:

I was under the impression though that a centri blower took less power to drive at low rpms than a PD blower as it isn't turning fast enough to generate much aerodynamic resistance. I've not had much success finding hard facts about their effects at lower revs, so I've timed a series of 0-60ft runs as a "before" benchmark and will do the same after I fit it, run it in and have the tune checked. If I get the chance to run some 1/4's I'll post them too... but that may take some time as I'll most likely hit the wagon's speed limiter with the 3.73 diff... 180km/h with a 3.23 diff becomes 153 (95mph) with 3.73.


The screw types like lysholm, whipple and keene bell dont create much low speed drag at all since they use the screws and not vanes. also the roots type with the vanes setup can cavitate at higher rpm, making them less effective than screw type at high rpm. so basically screw type have it all over roots type. Only thing is because they are such a better unit this converts itself into cost icon_smile.gif Much more expensive I am led to believe over the roots type. would be good if someone who knows the contacts to price a whipple/kenne bell, eaton m90, and raptor drive in drive out.

Im betting the centri takes maybe 0.1 off the 60 foot if at all. unless you have a 3000 stall and can get it as near to boost as possible off the line.
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badcooky
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PostPosted: Sat Mar 29, 2008 12:36 pm    Post subject: Reply with quote

Now i'm a troll who baits idiots...WTF.
The centrifugal does boost from idle but not much.
I lost track of what the Twin Turbo AU XR8 cost at about 22k.
Doing some exhaust stuff next week and dynoing straight after should be fun.
Apparently the belt problem has been sorted on the "R" thing ,they have a Territory with a 15lb pulley as a test mule that has done over 70 000 klms.
The grammar police will never get me alive.
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Dansedgli
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PostPosted: Sat Mar 29, 2008 12:47 pm    Post subject: Reply with quote

By saying you need to drive a turbo wicked, what do you mean?

Does your raptor powered 6 have more low end grunt than your TTV8 did?
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badcooky
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PostPosted: Sat Mar 29, 2008 1:01 pm    Post subject: Reply with quote

I shall reiterate i am not a troll who baits idiots so i refuse to reply.
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Dansedgli
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PostPosted: Sat Mar 29, 2008 1:25 pm    Post subject: Reply with quote

I just cant understand why someone would go from a TTV8 after spending $22k on it to a powerdyne spec supercharged 6 and say how much better it is than its turbo equivalant.

Surely you have your reasons for doing this, if you explained your situation and why you changed then surely other people might understand what you are on about.
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Steady ED
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PostPosted: Sat Mar 29, 2008 4:47 pm    Post subject: Reply with quote

Slick wrote:
Steady ED wrote:
hahaha, I'm just telling the truth.
Blowers with internal belt drives shred belts when you spin them too fast.
You can "aircool" them, you can run tricky belts, whatever.
It still happens.
And I think it's wrong to push them without highlighting that.


I think most of us here are aware of the internal belt drive problem. did you know powerdyne just release the new gear drive{ XB-1A } unit for the BD-10. the unit is a bolt on replacement for the current useless silent drive unit thats capable of 18psi.

there is a mob in NZ who are way ahead that makes their own gear drives for their centri chargers years ago. they flow 1950CFM, thats double or more air delivery then whats available at the moment, apart from pro-charger. I know who they are but I'm not going to spam them in here. LOL

And Vortech do a V3 with an internal oil resorvoir, and a V24 Z-trim that flows 2000cfm.
Big whoop, none if it has anything to do with this thread LOL
You blokes are lost, badcooky comes in here and starts harping on about Raptors being better then "turdbos", he gets put in his place, and then you lot jump in and start defending Raptor chargers.
How much are you guys getting paid?
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RAPTOR_XR8
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PostPosted: Sat Mar 29, 2008 5:05 pm    Post subject: Reply with quote

No one is trying to force Raptor products on people they are only excited about there new found power adder thats all.

I tryed to realisticly price every thing for a single turbo v8(for my ebxr8)
and i simply couldnt see it being less than 6 grand, unless i could weld but i cant so no savings there.

The centri supercharger maybe a compromise but it doesnt change the fact that they work and work well they do, obviously badcooky loves his damn POWERDYNE ( read Raptor but as dan states ).

Im trying to understand why there is bad blood between these differing types of power adders, each and every single type works.

Some people preffer there setup over (substitute for your fav power adder here) for there own reasons, if setup correctly it will/should be a weapon.

No doubt that a well setup turbo application should produce better times but why compare a ba ute with a raptor to a fmi turbo xr6 ?, i have never seen nor heard of a T to have over 190rwkw STOCK.

Please noone try to take this the wrong way but understand we choose what we choose for our own reasons.

Peace Brad
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Slick
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PostPosted: Sat Mar 29, 2008 5:38 pm    Post subject: Reply with quote

Steady ED wrote:
Slick wrote:
Steady ED wrote:
hahaha, I'm just telling the truth.
Blowers with internal belt drives shred belts when you spin them too fast.
You can "aircool" them, you can run tricky belts, whatever.
It still happens.
And I think it's wrong to push them without highlighting that.


I think most of us here are aware of the internal belt drive problem. did you know powerdyne just release the new gear drive{ XB-1A } unit for the BD-10. the unit is a bolt on replacement for the current useless silent drive unit thats capable of 18psi.

there is a mob in NZ who are way ahead that makes their own gear drives for their centri chargers years ago. they flow 1950CFM, thats double or more air delivery then whats available at the moment, apart from pro-charger. I know who they are but I'm not going to spam them in here. LOL

And Vortech do a V3 with an internal oil resorvoir, and a V24 Z-trim that flows 2000cfm.
Big whoop, none if it has anything to do with this thread LOL
You blokes are lost, badcooky comes in here and starts harping on about Raptors being better then "turdbos", he gets put in his place, and then you lot jump in and start defending Raptor chargers.
How much are you guys getting paid?


I'm not defending rapture, in fact I haven't said anything defamatory nor defending any particular product. more neutral on the subject sort of speak. as I recall, the subject was about PD. But you lot prefer to pay more attention to a newby with a big mouth who appears to be doing a good job baiting you lot. icon_lol.gif

Just ignore him for now until he has solid proof {dyno printout}


As for getting paid? I'm getting the full raptor kit send down as a gift/incentive to organise a group buy. ROFL

I think you should all read raptor_xr8 post, maybe some of you will snap out of it & get back on topic. LOL
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badcooky
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PostPosted: Sat Mar 29, 2008 6:07 pm    Post subject: Reply with quote

I got put in my place? you are one dumb MOFO.
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sly
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PostPosted: Sat Mar 29, 2008 6:51 pm    Post subject: Reply with quote

Steady ED wrote:
Blowers with internal belt drives shred belts when you spin them too fast.
You can "aircool" them, you can run tricky belts, whatever.
It still happens.
And I think it's wrong to push them without highlighting that.

I'm pretty sure Tim Staier is well aware of this fact, as one of the other things he does is repair & upgrade Powerdynes with better belts, bearings & impellor. IIRC he exports his bearings to the USA. So he knows a thing or two about the potential shortcomings of centrifugal SC's.

I could well be wrong, but I doubt that the design criteria for "the first all-new centrifugal supercharger designed from a fresh sheet of paper in more than 20 years" (according to http://www.928m.com/parts/raptorsuperchargers.php) would include the Powerdyne's out-of-the-box levels of quality and reliability as a benchmark.
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RAPTOR_XR8
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PostPosted: Sat Mar 29, 2008 7:04 pm    Post subject: Reply with quote

Also Raptor clearly state that the blower will boost to 14psi BUT no warranty after 10.


Up to 10psi (warranted operation) and up to 14psi (no warranty if used over 10 psi)
See for yourself.

http://www.raptorsc.com.au/products.php

What i would like to see is people getting behind an Australian product, also ask youself why has capa now lowered there prices for there sealed head units?

Another thing to consider is belt slip which the capa brackets do seem to get a fair bit of

I personally cannot vouch for Raptor brackets etc as i have made my own system.

Look i think this has all gone off topic for far too long i will no longer contribute to off topic post's after this post

No harm ment Brad
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sly
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PostPosted: Sat Mar 29, 2008 7:05 pm    Post subject: Reply with quote

More Grunt wrote:
Im betting the centri takes maybe 0.1 off the 60 foot if at all. unless you have a 3000 stall and can get it as near to boost as possible off the line.

That's what I was inclined to assume until I found this info --> http://www.928m.com/parts/raptorsuperchargers.php about a test installation on a Ferrari in the USA. I don't know whether it'll do anything like that on an I6, but the 2000rpm mark is significant to me. That's the stall speed of my converter. That's why I'm taking the time and trouble to run some objective tests for myself, no-one else can truly say how much effect it has on launch times and back it up with figures. When my numbers are in, I'll post them up, good, bad or indifferent.

And if anyone misconstrues that as "pushing" the product, they can go f**k themselves. icon_evil.gif
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Slick
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PostPosted: Sat Mar 29, 2008 7:33 pm    Post subject: Reply with quote

Theres nothing wrong with raptor. just some punks trying to slander whats Australian made & owned. they should be supporting it. who knows, maybe in a few years they'll become the most sort after go fast bits world wide plus a more efficient model to keep up with todays fussy demands. it'll happen anyway regardless of scepticism because there are people out there who prefer a package thats easy to fit & forget. that brings us to the next objective, those who are greedy for boost, go for the "R" Tim has said he'll look into it for the 6's. centri blowers will become more efficient & reliable as technology progress. all you need is to package it & target the right market icon_exclaim.gif
its not going to help the situation if the cookie monster keeps coming on here stiring s**t icon_evil.gif

Who knows. in due time, raptor could become sponsors!
has anyone thought of that?



sly, go f**k yourself. LOL


Last edited by Slick on Sat Mar 29, 2008 8:36 pm, edited 3 times in total
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