Check out all the info about the soon to come new S/C kit for the 4th gens, 5th gen to follow shortly after.

All the info on the kit is below at this link, any questions email me as my PM box is still messed up Maxstilln@hotmail.com

http://www.maximaforum.com/forum/sho...&threadid=2486

 

In the maximaforum thread you state it will be a shaft driven blower. Being a rotordynamicist, I've often wondered about flexural and torsional critical speeds of shaft driven SC systems. I would think a shaft driven blower would traverse several critical speeds on its way up to max speed. Any analysis or testing done to ensure there is enough damping in the system to attenuate response to safe levels? Or is the shaft stiff enough to ensure subcritical operation throughout the speed range? If not, then you may be prone to eventual fatigue failure.

 

yeah......... what he said!!!

 

 

Well, now I feel like Professor John Frink. I assure you, I asked the question in all seriousness, but I think that may only make matters worse ...

 

dang, even I gotta break out the Webster's for that post...

you go Stephen.....

 

Okay, Cliff notes version:

Wud aBouT shaFt VibRatioN yo

 

 

I don't think it is an issue of shaft vibration, as much as the question of what will happen to a blower geared up 2 or 3 to 1 (i.e. high speed on your huffy) when you run across a dumbass kid in a rice rocket. Do you a) just laugh him off and allow him the joy of slowly pulling ahead of you at 9000RPM at 70 MPH, or b) Drop from 4th to second and hammer on it, instantaneously causing your blower to JOLT from 6600RPM (assume 3:1) to 17400RPM. Thats a huge amount of torsional shock to a system...especially when you consider how much more torque is required to blow around the air at 17400 RPM.I would imagine you could snap a 2" driveshaft easily with that kind of delta tau. The belt in a belt driven system will take up most of the initial shock associated with such driving situations...I would want at least a rubber isolating "donut" between the camshaft drive and the blower shaft....even then you're asking alot. Good luck

Spence
aka. Dr. Evil

 

i think they make these type kits for some civics.
http://www.clubsi.com/featured/sirac...shtml#siofweek

 

Let see some pics of this kit. If the radius of the s/c impeller is not too big, flexure wont be an issue. What type of S/C they use? centrifugal?

 

These are all very valid points that I have brought to the attention of the guys building the kit. I'm sure they have thought about it but thanks for the input, I'm glad to see people seem interested in the kit. We are still waiting for a few parts to arrive so I don't have pics yet, hopefully very shortly. Any other questions please don't hesitate to post or shoot me an email.

 

Good point. If the system is designed so that the belt drives a pulley connected to the step up gearing, and then the shaft connects the gears to the impellor, then the driven inertia (i.e. the impellor inertia) will be small and maybe the shaft can be made subcritical for all modes of vibration. Maybe. Torsional impact loading that Spence was talking about will be minimized as well.

On the other hand, if the step up gearing and the impellor are at the far end of the shaft, opposite the pulley, then the driven inertia will be significant and it may be difficult designing a shaft stiff enough to keep you out of trouble.

 

My intillects precisely Stephen. Not only that but I was hypothesizing if one used a flux transistor bypass solenoid to connect to the impulse resistor, I am certain that the shaft driven blower could propagate the power discharge through the transaxial internal differenetial link, thus contributing to the overall efficiency of the SC. What do you think?

 

How come I'm the only person that thinks I'm funny?!

lol

I know, I know... don't quite my day job.

 

yuh have to reverse duh flux capacitator...den dem pesky racers kain't ketch yer ****.

 

Hey all:

We're the ones Jeremy is referring to, so I thought I'd comment

It's still up in the air about doing a shaft driven setup or have it right on the power line (come right off the serpentine belt)

Procharger still has us on hold for the head unit we'll be using - it is a brand new unit, self contained, and they claim will be capable of over 1000 cfm (heh, it's unlikely we'll ever hit that level of airflow)

I'm looking for comments and input from those interested on here - need your concerns, woes from other forced induction kits, etc.

Email me at: cclough@xtecheng.com with anything you can think of.

Best regards,
-Chris

______________________
Chris Clough
xtech, LLC
http://www.xtecheng.com/
info@xtecheng.com

 

I spoke with Chris yesterday and things are coming along slowly, Pro Charger is delaying the project since they have not sent out the unit yet for fitment He has just about everything figured out just needs the unit to fit everything. Once it arrives we should be rolling and I'll post pics. Any feedback let myself or Chris know.

 

wow...delta tau(over delta time, of course)? man you guys are some REAL engineers...

anyway, what are the details of the system? is it an infinitely variable gearing system? and what about the shear stress on the belt...do the gears move or does the belt move? i think they should make a "CVT" covered in ceramic to link the accesory belt to the blower, and see what happens. ripping a belt to shreds wont be cool for the impellor either, id imagine...thats some MAJOR dT/dt...

-95SE

 

Whats the point of them making this kit...more Reliable? More Power?

 

Ummma...you so busted...you got a girl in your pic.

 

Its a picture of "My" Girl.... Is that against a house rule or somthing

Hey man i think i know you...Were you the one E-mailing me about Custom turbo kits, and how i should do mine local, and i ended up telling you how i was doing it all my self?

Then we talked on AIM, my SN is GTR Maxima 1

 

damn i brought up building one of these a whileeee ago, like how the civics have it to get rid of having the s/c pipe riding on the radiator piping..... people made fun of me now everyones all about it.

 

Having a shaft driven blower, would this change boost peek? Stillen superC give full boost very high in the RPMS, would a shaft driven one give full boost at a lower RPM all the way up to red like ?

 

The shaft doesn't have anything to do with where the peak boost is. That's determined by what type of blower you're using, and I think this kit still uses a centrifugal type, so you still end up with peak boost at redline, just like the Stillen kit.

 

Then whats the point of the kit ?

 

Because the Stillen kit has belt alignment issues (I'm on my second belt) it melts the idler pulley, the Vortech blowers aren't that great, the crossover pipe goes right over the radiator which makes it rather hot (bad for efficiency), and so on. Lots of problems.

It's like saying they already make an intake, what's the point of making a different one? Because you can always improve on things.

 

i believe the prochargers are geared. i've seen one and it's friggin' huge (although it's being put on a 1600 hp drag car it's still sweet) here is procharger's website http://www.procharger.com/ and the s/c models are listed here http://www.procharger.com/models.shtml

 

Sorry to dig up an old gem. But does anyone have the pics of the Russian guy that made a custom kit like this?

I was talking to someone about it and we were just trying to figure out what the torsional strength would need to be to have a balanced shaft.

SM-I know you don't post very much anymore, but I'm sure you thought about it in depth a long time ago, so I'd like your input.

Thanks guys
Steve

 

Yup, here you go, post #18 - #20 ish

http://forums.maxima.org/showthread....t=discontinued

 

Yup, here you go, post #18 - #20 ish

http://forums.maxima.org/showthread....t=discontinued

The scion tC supercharger is designed this way too.

 

Yeah, I know how trd makes theirs.


Thanks.

 

Alright,

Just for an update we're discussing this type of kit.
http://tadnsk.ru/works/index.php?p=1

 

Here is the mounting plate for the cross shaft and tensioner.


Mounted

 

The lowest pulley does not need to be fabricated. You can do without it.

The water pump cover is just modified as well. Looks good.

 

Supercharger mount






The coolant pipe seems to be similar to the one in Matty's kit. I know that it took a lot of time and effort for him to get those correct.

 

If you scrolled the blower up, it would be pointed directly at the tb.

Now imagine that setup with a 00VI, SSR Coffin Manifold or even the IM that Stephen Max worked on that had short stacks.

 

Thats the add on Steve. That outer part that you showed is the stock part. All they did was make an add on, at the block, to extend it out a bit to clear the blower bracket:



Seems like an interesting idea but it looks like alot of "high priced" peices. That shaft alone looks like a small fortune. And all those perfect molded mounting brackets, just to me looks like pricey $$. Doesnt look like a fun install either considering you have to cut the timing chain cover. No way your doing that install with the motor in the car still. Too hard of a job with the motor still installed. Look at all those dam* pullies !!! ...


-matt

 

Thats what I thought, too many pullies. But you have to admit its a beautiful setup. I'm not so sure that the timing chain cover is replaced. It looks like they just powdercoated it. The arc is most likely CNC'ed into the mounting bracket. Since there are two CNC'ed brackets instead of 1 CNC'ed bracket and welding pegs, do you think it would be less expesive than yours? I know that you did a lot of R&D for your kit to ensure proper fitment. I wonder how long it took for them to get this right.

As for the high dollar pieces, you can easily "cheapen" the kit. There are plenty of places where you can save on some money.

 

slimer, from the other pics, it looks like the timing cover has to be modified/cut to fit the bracket piece. but it seems to fit perfectly in place. cutting that section of the t-chain cover doesn't seem that difficult if you diconnect the mounts(exe driverside) and tilt the motor up like when you do the WP job