WHy not buy Magnuson Supercharger cheaper

[ibb88]

Guys, I'm trying to pull the plug on the supercharger for S5. I see Magnuson has them for thousands less than APR. Can we go that route to save some $$?

[Blackstallion]

Easy solution --> https://jhmotorsports.com/shop/catal...ge-p-3432.html

[jwr9152]

I've got the APR 1320 on my car and love it. I've heard mixed reviews about the 1740, so I shied away from upgrading. I'm not sure you can even get either one anymore. APR quit selling it, and I thought Magnuson did also.

[doug97gxe]

Easy solution --> https://jhmotorsports.com/shop/catal...ge-p-3432.html

Best Solution*

[chrissurfr]

why isn't JHM doing this for RS5 yet :(

[doug97gxe]

why isn't JHM doing this for RS5 yet :(

They said they need an RS5 to do it


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[the duke]

They said they need an RS5 to do it


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Ugh the want is real..

[doug97gxe]

Ugh the want is real..

They said they will have one in house this Jan


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[RossGA]

The JHM kit is very conservative in comparison to these other options.

The APR and the Magnusun push 550+HP right out of the box, the JHM currently caps out at ~450.

The blower itself can easily push 800HP, so I'm not sure why they stopped where they did. My guess is fueling, or intake temps due to the blower style. It looks like they are investigating better fueling and an inter-cooler option, which might get them over 500HP.

But for raw power out of the box, the APR and Magnusun setups are hard to beat. I don't really know if they are options anymore anyway, I still see them listed around but I think both have actually been discontinued.

[doug97gxe]

The JHM kit is very conservative in comparison to these other options.

The APR and the Magnusun push 550+HP right out of the box, the JHM currently caps out at ~450.

The blower itself can easily push 800HP, so I'm not sure why they stopped where they did. My guess is fueling, or intake temps due to the blower style. It looks like they are investigating better fueling and an inter-cooler option, which might get them over 500HP.

But for raw power out of the box, the APR and Magnusun setups are hard to beat. I don't really know if they are options anymore anyway, I still see them listed around but I think both have actually been discontinued.

It's a centrifugal supercharger it doesn't have cooling issues.. the kit is a conservative kit for stock internals

You guys get so hung up on numbers to research on potential of the difference of both kits.. besides APR kit is dead

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[RossGA]

It's a centrifugal supercharger it doesn't have cooling issues.. the kit is a conservative kit for stock internals

You guys get so hung up on numbers to research on potential of the difference of both kits.. besides APR kit is dead

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No, I've looked into it. Quite extensively; and will probably be running the JHM Stage 1+ kit once it is out and about. And it's not a matter of getting hung up on numbers. Its a simple matter that the ARP/Magnusun kits are producing over 100HP more than the JHM STG1 kit on stock internals, with no systemic problems that I'm aware of. So I'm skeptical that internals are the limiting factor for JHM. At least getting to 550HP. I suppose there could be a longevity concern, having to do with the stock internals. But the stock internals are quite capable of producing 550HP without immediate catastrophic failure; for at least 10s of thousands of miles; APR, Magnusun, MTM, et al have proven that. JHM simply has other reasons to not push their Stage 1 kit to that point; at least for now. I suspect fueling, longevity, or charge heat; which would make sense as they are suggesting their Stage 1+ kit will have fueling upgrades and intercooling; as well as added boost (pulley).

All forced induction methods have cooling issues, at least to some extent. Heating the air during compression is a result of the basic physics equation of putting it under pressure. Sure, external centrifugal is not going to heat up the intake manifold like a screw type; or cause turbo heat-soak due to exhaust gas proximity. But it is still going to cause charge heating nonetheless. There simply will be a point where charge heating will negate/adverse the effects of added boost. And if your fueling is peaked out, you're wasting your time anyway. I know the APR kits comes with fueling upgrades (high pressure pumps, ect, ect..). My guess is, to get much beyond 450HP, fueling upgrades are absolutely required.

Or maybe JHMs reasons for capping the STG1 kit at ~450HP are simply economic; they offer a great 100HP upgrade, far cheaper than the other kits (by thousands of dollars) and will offer similar performance to the other kits with upgrades to their basic kit. Their STG1 kit might be set up the way it is simply to leave pricing and performance room for the STG1+ and perhaps a STG2 kit in the future. My guess, is when their kits are knocking on the door of 600HP+, we are looking at rebuilt engines with improved internals. But to get to 550, unless there is some long range longevity problem, the stock internals aren't a hold up.

I do love the fact that JHM released a great kit at a lower price, that is well tested. And that by the time the STG1+ and STG2 kits show up, they will have been tested just as extensively; with not only performance but longevity in mind. Some tuners just want to get the numbers as high as they can without blowing the motor up, and don't really care if you have mass oil consumption problems or a disintegrated piston in 20-30K miles.

[wahpao]

The JHM STG 1+ runs a smaller pulley, HPFPs , a water to air IC and tune.

The STG 1+ has not officially been released so that may just be the reason why the STG 1 is only available. Per conversation with Dru, STG 1+ releases spring 2017 or in 2 weeks.

STG 1+ I would say is the equivalent of the APR 3+, TTS and AMD HP kits based on 1/4 mile times.

I think what you have to take notice is the how much boost each kit is running. The other kits are running anywhere from 13-16 PSI vs 6-8 PSI on he JHM kit. Producing similar results on half the PSI and not as strenuous on the motor. Also the roots blowers are maxed out on power while the Vortech SC is still capable of 800hp but will need the built motor to support it.

There's other pros and cons to each system, so I don't want to seem too bias. The STG 1 is just another option being offered. AMD is the only other company with options also. Not everyone may want 200 hp. For the most part, these are the only 4 kits I would even consider purchasing.

[Deleos]

Addict Motorsports also make a super charger. I wish I could find some input on how they perform. I'm not sure where to look to find real world owners reviewing it.

https://www.fastaudi.com/store/!/AMD...ory%3D14354179

[RossGA]

I think the blower style of the JHM kit would match up with my manual transmission and driving style more-so than the roots setup, but I have to say I love the fact that the roots blowers replace the intake manifold on the S5......I hate the way the S5 intake manifold is designed with that goddamn flap.

[yagie]

Noob statement here as I'm just getting into a 4.2 in the next week, but is there a difference in the rs 4.2 and the s4.2 intake manifold design? I know the internals(heads, rods, pistons, balanced crank etc) and headers are different. But if the intake mani is different and could possibly fit would it be worth the change? I'm also planning on doing the JHM STG1+ if this purchase works out this week.

I just know as soon as they get to the point where they have the proper methods and testing in place to build the 4.2 and possibly bore or stroke it if that every becomes an options I'm jumping on it. I want to see an 8k+ redline out of the base 4.2 and see what number we can really push. The S5/RS5 is a perfect machine. It just needs the numbers pushed out of it that you see with other high performance awd competitors.

[Porschephd]

Addict Motorsports also make a super charger. I wish I could find some input on how they perform. I'm not sure where to look to find real world owners reviewing it.

https://www.fastaudi.com/store/!/AMD...ory%3D14354179

JHM serves a different need and price point. I had built a SC kit for the Boxsters back in the day and understand the challenges to bringing something to market and making it reliable. Last thing you want is to sell a product that leaves a customer on the side of the road. JHM's price point is great and the gains are perfect. Risk is low.

That said the fastaudi kit is a very thought out kit. Power will be delivered quicker than a centrifugal blower but also puts stress in areas that hadn't seen it before. From an engineering standpoint I think you get 12K worth but what would be the long term affect on equipment. Centrifugals deliver power along a natural path of the motor to begin with as opposed to dumping it early.

If money was no object the roots would be the way I go along with the strengthening of components. However it is and if and when I do it I will be going to JHM as the price vs value is right in line.

[Jake@JHM]

JHM serves a different need and price point. I had built a SC kit for the Boxsters back in the day and understand the challenges to bringing something to market and making it reliable. Last thing you want is to sell a product that leaves a customer on the side of the road. JHM's price point is great and the gains are perfect. Risk is low.

That said the fastaudi kit is a very thought out kit. Power will be delivered quicker than a centrifugal blower but also puts stress in areas that hadn't seen it before. From an engineering standpoint I think you get 12K worth but what would be the long term affect on equipment. Centrifugals deliver power along a natural path of the motor to begin with as opposed to dumping it early.

If money was no object the roots would be the way I go along with the strengthening of components. However it is and if and when I do it I will be going to JHM as the price vs value is right in line.

Our 1+ will be out soon as well which is a nice jump in power

[Deleos]

JHM serves a different need and price point. I had built a SC kit for the Boxsters back in the day and understand the challenges to bringing something to market and making it reliable. Last thing you want is to sell a product that leaves a customer on the side of the road. JHM's price point is great and the gains are perfect. Risk is low.

That said the fastaudi kit is a very thought out kit. Power will be delivered quicker than a centrifugal blower but also puts stress in areas that hadn't seen it before. From an engineering standpoint I think you get 12K worth but what would be the long term affect on equipment. Centrifugals deliver power along a natural path of the motor to begin with as opposed to dumping it early.

If money was no object the roots would be the way I go along with the strengthening of components. However it is and if and when I do it I will be going to JHM as the price vs value is right in line.

Unfortunately the weather here in the Midwest doesn't allow me to install the JHM kit due to the restrictions on the supercharger.

Link: https://cdn.shopify.com/s/files/1/07...85038818028430

In order to achieve the low noise level of Vortech
superchargers, Vortech specifies manufacturing
procedures that call for minimal internal clearance.
These precise tolerances however are not
conducive to temperatures below 25° F. Therefore,
storing the vehicle in a heated garage and/or
employing the use of an engine block
heater/aftermarket engine blanket is required when
the vehicle is subjected to a "cold startup" in
ambient temperatures below 25° F. Failure to
comply with this may result in immediate
supercharger failure and invalidate the
supercharger warranty.

[Jake@JHM]

Unfortunately the weather here in the Midwest doesn't allow me to install the JHM kit due to the restrictions on the supercharger.

Link: https://cdn.shopify.com/s/files/1/07...85038818028430

We have customers who have the blower kit in colder climates without issue and have done so for years/

[wxsgt]

Our 1+ will be out soon as well which is a nice jump in power

Preliminary numbers?

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[Jake@JHM]

Nothing I can talk about yet =/

[ICU2]

Can you talk ~ any progress made on a SC for the RS5 you mentioned to me some time ago? Have you guys secured a RS5 for the shop for R&D? Just waiting patiently, hoping wildly.

Nothing I can talk about yet =/

[Rshane]

Nothing I can talk about yet =/

Impatiently waiting 😜

[S5Pilot]

I just ordered my JHM kit. Hopefully the 1+ doesn't come out soon as I'll have my car all apart for the install in 2 weeks. Will the upgrade to 1+ take into account the initial purchase price on the stage 1?