RSM supercharger off the accessory belt?? - Boost Forum

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RSM supercharger off the accessory belt??
Tuesday, October 23, 2007 8:46 PM
i was wondering if anyone has taken the vortech supercharger off their RSM kit and mounted it where the AC pump would normally sit? i found a used kit for a decent price but was thinking of scrapping the power steering drive system because of all the oil issues ppl have been having. if i bought a different drive pulley from vortech (or had one made) and had a mounting bracket made up to fit where the AC should be i could eliminate the oil issue. not to mention it would be fairly easy to pipe in an intercooler if the charger is down there.


Has any one tried/done this? can any one think of any issues i might have with this?




Re: RSM supercharger off the accessory belt??
Tuesday, October 23, 2007 11:21 PM
Camshafts rotate at half the angular velocity of the crankshaft. You are going to need a larger charger pulley to prevent over-spinning the charger. You would probably need a different pulley anyways to match the ribs on the accessory belt. Apart from that and getting it mounted sturdy, I really don't foresee any real problems associated with doing that. Just make sure your spinning the impeller in the right direction.

I don't think anyone has done this, but there are Vortech kits for the Delta platform to use the accessory belt.


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 2:41 PM
Too much time, money, and effort to make it work, and in the end it wouldn't be worth it. Sure it'd be different, but I honestly think you shouldn't bother.




14.330 @ 96.37mph
Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 5:14 PM
Brian Whalen wrote:Camshafts rotate at half the angular velocity of the crankshaft. You are going to need a larger charger pulley to prevent over-spinning the charger. You would probably need a different pulley anyways to match the ribs on the accessory belt. Apart from that and getting it mounted sturdy, I really don't foresee any real problems associated with doing that. Just make sure your spinning the impeller in the right direction.


i know i will need a bigger pulley to slow it down but from what i read in outher posts, the stage 1 rsm kit only runs the impeller at just over half of the max speed. according to the rough math i did last night i would need approximately a 2.5" pulley on the charger. i'll do better math later on to confirm or correct that number. impeller direction will be right because the cams spin the same direction as the the crank right?


BlownBlackZ wrote:Too much time, money, and effort to make it work, and in the end it wouldn't be worth it. Sure it'd be different, but I honestly think you shouldn't bother.



time--- any decent build takes time
money--- i can spend a little more than i would putting on the GM setup and i will have an intercooler and a charger capable of 20PSI and 800 CFM (according 2 Vortech)
effort--- whats the fun if you don't need effort?


something i thought of at work today.... will i need a oil pump system on the return line to keep the oil from pooling in the gearbox since the sc will be sitting fairly low in the engine bay?



Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 6:00 PM
sleepy sunfire wrote:
Brian Whalen wrote:Camshafts rotate at half the angular velocity of the crankshaft. You are going to need a larger charger pulley to prevent over-spinning the charger. You would probably need a different pulley anyways to match the ribs on the accessory belt. Apart from that and getting it mounted sturdy, I really don't foresee any real problems associated with doing that. Just make sure your spinning the impeller in the right direction.


i know i will need a bigger pulley to slow it down but from what i read in outher posts, the stage 1 rsm kit only runs the impeller at just over half of the max speed. according to the rough math i did last night i would need approximately a 2.5" pulley on the charger. i'll do better math later on to confirm or correct that number. impeller direction will be right because the cams spin the same direction as the the crank right?


BlownBlackZ wrote:Too much time, money, and effort to make it work, and in the end it wouldn't be worth it. Sure it'd be different, but I honestly think you shouldn't bother.



time--- any decent build takes time
money--- i can spend a little more than i would putting on the GM setup and i will have an intercooler and a charger capable of 20PSI and 800 CFM (according 2 Vortech)
effort--- whats the fun if you don't need effort?


something i thought of at work today.... will i need a oil pump system on the return line to keep the oil from pooling in the gearbox since the sc will be sitting fairly low in the engine bay?


I don't know how the charger is supposed to sit on the motor. If the compressor sits facing the driver's side and the pulley faces the passenger's side then make sure it sits that way when you have it running off the accessory belt (or vice versa if the compressor sits facing the passenger's side)

I did a quick calculation, but it should be:

(new charger pulley diameter) = 2*(crank diameter)*(stock charger pulley diameter)/(stock charger camshaft pulley)

you could use circumfrences if you would like instead of diameters.


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 8:00 PM
the way the kit mounts the pulley faces the passenger side so i'm good there.. your equation is good if i want to run it at the same speed as the kit pulley system.... the kit runs it too slow. according to vortech this charger is capable of producing 20 psi. the kit is lucky to see 8psi from what i hear

now i just have to find a cheap beater i can drive 4 winter so i can work on this contraption



Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 9:05 PM
Pressure is relative. What is the max CFM's that Vortech says THAT PARTICULAR charger will push?


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 9:33 PM
850 CFM




Re: RSM supercharger off the accessory belt??
Wednesday, October 24, 2007 9:46 PM
here's a link to the vortech spec page http://www.vortechsuperchargers.com/pdf/guides/scmatrix.pdf the s/c in the rsm kit is the V9 G trim (very bottom of the chart)




Re: RSM supercharger off the accessory belt??
Thursday, October 25, 2007 11:37 AM
My god!!! Yeah...20 psi sounds about right




...but your rods will be long gone before you get anywhere close to that kind of horsepower...lol.


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Thursday, October 25, 2007 4:19 PM
o ya.... its gonna get a built engine before it sees that kind of boost

i'm still wondering about the oil drain thing tho... i'm thinking of a catch can with a pump in it to ush the oil back up into the motor?




Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 6:10 AM
I expect that the blower would rotate the opposite direction needed. Depending on the way you mount it, of course.

Why not just buy a blower from Vortech? If you buy the pulley with it, you retain the warranty. rebuilds can be expensive! You can even get a mounting plate that attaches to the blower. You just need to adapt it and deal with belt routing.

Sounds like an exciting project. I always wondered if you could move the coolant resevoir and make it fit there. A top engine mount/blower mounting braket might work well and hopefully keep the air on the car. If you pull it off, I bet you coud sell a few of the brackets if you produced them.









Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 8:58 AM
run a intercooler with it


which ever way you go







Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 2:49 PM
[quote=97cavie24ls(™)]run a intercooler with it


which ever way you go

I'd have to agree. Especially since you are looking for higher boost levels.

There is a guy on Cobaltss.net that has replaced his eaton wit a procharger. He has stated that he is already getting better numbers over the heaton at similar boost levels. We have yet to see a balls out cent. blower package for the J.

I would like to see it happen.



Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 3:44 PM
Craig Lewis wrote:I expect that the blower would rotate the opposite direction needed. Depending on the way you mount it, of course.

Why not just buy a blower from Vortech? If you buy the pulley with it, you retain the warranty. rebuilds can be expensive! You can even get a mounting plate that attaches to the blower. You just need to adapt it and deal with belt routing.

Sounds like an exciting project. I always wondered if you could move the coolant resevoir and make it fit there. A top engine mount/blower mounting braket might work well and hopefully keep the air on the car. If you pull it off, I bet you coud sell a few of the brackets if you produced them.

Are you talking about mounting the charger to the body? If so, I would HIGHLY advise against that.


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 4:02 PM
Jebus,

Do I sound that stupid on the interweb?

Here's a quote from me.
"A top engine mount/blower mounting braket might work well"

With the blower mounted on the engine/mount, the blower, plumbing and such would likely need the room.

RSM did a Saturn kit like that. It did not have any belt slip issues and had the potential to be a wicked setup.

http://www.coustic.com/showcars/ion.htm





Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 4:17 PM
That's fine. As long as the charger is allowed to oscilate with the motor, then all is well. I was just making sure we are on the same page


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"Youth in Asia"...I don't see anything wrong with that.
Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 7:20 PM
no benefit in running it there



1989 Turbo Trans Am #82, 2007 Cobalt SS G85





Re: RSM supercharger off the accessory belt??
Friday, October 26, 2007 11:25 PM
Craig Lewis wrote:Jebus,

Do I sound that stupid on the interweb?

Here's a quote from me.
"A top engine mount/blower mounting braket might work well"

With the blower mounted on the engine/mount, the blower, plumbing and such would likely need the room.

RSM did a Saturn kit like that. It did not have any belt slip issues and had the potential to be a wicked setup.

http://www.coustic.com/showcars/ion.htm


holy @!#$ Craig is still alive

but anyways back on topic, it would def be a different idea and be really cool if it worked, i say go for it



Re: RSM supercharger off the accessory belt??
Saturday, October 27, 2007 3:47 AM
Rodimus Prime wrote:no benefit in running it there


Sure there would be. A larger blower pulley would go a long way. You could spin the blower faster and easily downsize the pulley for more boost when you build the engine.

There would be less need to reef on the tentioner repeatedly to kep the belt tight.

A pulley from Vortech so that you get the warranty.

It's my recolection that you had your kit running pretty well before your engine got tired.. I am suprized you dismiss the potential of the Vortech.


Quote:

NOTBORGS (carey965)
Yesterday 11:25 PM


holy @!#$ Craig is still alive


Hey,

Alive, but just barely.



Re: RSM supercharger off the accessory belt??
Saturday, October 27, 2007 11:01 AM
ya i have seen how much you smoke




Re: RSM supercharger off the accessory belt??
Saturday, October 27, 2007 12:54 PM
You have no idea how much I was surprised when he (Craig) was on the other end of a phone call to my cell phone one afternoon, I almost fell over in shock!

Speaking of which, did you get that fuel filling problem sorted out?





14.330 @ 96.37mph
Re: RSM supercharger off the accessory belt??
Saturday, October 27, 2007 3:41 PM
BlownBlackZ wrote:You have no idea how much I was surprised when he (Craig) was on the other end of a phone call to my cell phone one afternoon, I almost fell over in shock!

Speaking of which, did you get that fuel filling problem sorted out?


It is my neighbours kids car. First, the grandmother told me she knew how to fix it. So she drove it off a curb a few times. lol. It's still screwed. The father came home from being away from work, and he is sick of fixing his 20 something daughters car for her. She has banged the car up a fair bit(lotsa money on this car) So, it still takes her at leeast ten minutes to add half a tank. lol.



Re: RSM supercharger off the accessory belt??
Saturday, October 27, 2007 10:27 PM
Craig Lewis wrote:I expect that the blower would rotate the opposite direction needed. Depending on the way you mount it, of course.

Why not just buy a blower from Vortech? If you buy the pulley with it, you retain the warranty. rebuilds can be expensive! You can even get a mounting plate that attaches to the blower. You just need to adapt it and deal with belt routing.

Sounds like an exciting project. I always wondered if you could move the coolant resevoir and make it fit there. A top engine mount/blower mounting braket might work well and hopefully keep the air on the car. If you pull it off, I bet you coud sell a few of the brackets if you produced them.


i already have the blower from the rsm kit. i bought the entire kit with the blower, piping, blow off valve, pulleys, and a set of 370 cc injectors for 1500cdn. for the same blower vortech wants over $2000US, and thats just the blower.

i'm just kind of throwing ideas around right now. the car is still my daily driver so it most likely won't see the blower till spring. i plan on figuring out the mounting bracket over winter tho because i have another engine i swapped out last november sitting in the shop still. i can play with postitioning and fab up the brackets without tearing my car apart.



Re: RSM supercharger off the accessory belt??
Sunday, October 28, 2007 3:16 AM
The best way I have seen a braket developed was by using plexi glass for the design. He could see through it for design and it was easily worked for a prototype. He then simply made the aluminum version to match.

Good luck with the project. I hope you decide to go all out. But be careful. Those blowers can flow.



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