RJ MFG Supercharger kit Feeler...
 

Ladies and Gents,

As many of you know we pride ourselves in our products, workmanship, value and innovation. With that said we want to get your market feedback on whether we introduce another kit onto the market. We are looking into three platforms:

1. The highly successful Rotrex style kit that a previous manufacturer built upon. With this we would be starting every kit with a C38 sized supercharger. The max we could pull out of this Super charger would be somewhere in the low to mid 600whp range.

2. The votech or procharger style supercharger in either a V2/V3 trim or a C2 from procharger. This style kit like the other will be based on efficiency and performance. We will be doing a full air to air setup on this as well. We would be looking at a similar power level as well in the low to mid 600whp range.

3. A Roots style super changer using a (W175AX) trim. we would also be running an Air to water setup as well. This kit would require hood cutting as the space available isnt enough. There is also a likelihood we would have to redesign a strut bar for this kit as well. The positive of this setup is max boost for a larger portion of the powerband.

What we would like to gauge from the market is what you would like to see. What you would be willing to put your money on.

The kit we produce will be made 100% here in the USA. It will use the highest quality hardware and not break your bank. We want to produce a kit that the track guys can take on the track run a whole session of fast laps and not be worried about heat. For the canyon driver to be able to get out of the corner faster with linear power band and predictable traction. We are looking to build a kit that doesnt require a motor build to have fun in the forced induction family. It will be paired with safe and reliable tuning and will be designed for those who want to run headers or a new intake manifold...

So your options in the poll are this:

1. Rotrex design similar to what was produced earlier and is no longer available. (including pulleys)

2. A vortech or procharged unit more efficient than whats on the market.

3. A Whipple roots style system that would require cutting your hood...

What ever you choose, don't leave out the CA guys. Do the work, get the CARB cert.

We will definitely look into the CARB certification and requirements.

Would the kit have options to put a bigger blower to make more power.

3. Whipple - This has never been done and would open up an entirely new system to the platform.

I am curious what your plan is to get up to 650whp out of a c38 or v3. These have already been pushed to the ragged edge and it isnt getting close. Especially if you are going to pulley it to stay within the manufacturers suggested rating. The only chance of getting past the 600 mark is going with a V2 but even then you will need to overspin it way over its rated rpms, which has been done with good success on other platforms. But are you going to warranty it if you pulley it to do that?

F@ckin hell, just when I'm set on turbos this time around, y'all make me rethink my ideas. I really like the rotrex unit personally. I had the GTM Twin Supercharged kit, but the tensioner pulleys kept breaking, squealing, belts shredding, then the stock tensioner pulley broke too. I liked the quiet operation of the rotrex, it increased the volume of the car, so it sounded like a pissed of NA car till the bypass valves went psssshhhhh.

I would consider this heavily if the kit can make a promised 600whp, especially with you being local to me.

Voted

The C38 - 91/92 trim is capable of ~725Bhp and with the correct supporting mods such as headers, built heads, and a more efficient setup should net you in the 600whp range. Most of the stage 2 GTM kits got the smaller version of the C38. Not to mention that the GTM kit was open to the headers. This leads to the supercharger bringing in hot ambient air. Combined with a small cheap intercooler you will end up with hot IAT. If we were to do a C38 kit it would definitely have some changes to make.

As for the Vortech/Procharger kit. We are still up in the air on this and we have even thought of going to the V7 trim possibly. At this point we want to see what people are interested in. We do have a customer we are working with right now to fix the Stillen kit he has. I don't believe we have pushed these super chargers to their max yet especially given the lack of efficiency found in the competitions kits. But we will let our kits do the talking...

As for the positive placement unit. We are a huge fan of this idea. However, there are space constraints to deal with. We would truly need some interest from the community to proceed further. This has a lot of advantages to it and we would like to bring something new to the table.

I like the idea of the c38 and the whipple! Lol no one likes the second option lol

Interesting.

Well the Vortech V3 si trim is rated at 775bhp (50hp more than that c38) and we know that it is impossible to get that on the 370z. Even with overspinning, a huge fuel setup and E85 we are 125hp away from that mark. So the 725bhp rating on the c38 doesn't mean much.

Adding headers and built heads would help a little, but will this come in the kit? :ugh2:

I am not trying to put this idea down. Just make sure that if you bring a centri unit to the forum, it can actually make the power claims you stated instead of having a bunch of guys waiting for a system that leaves them deflated.

I like he idea of the Procharger, but keeping it under the hood isn't in our favour. Otherwise I'd be all over it like white on rice. That is if I hadn't just committed to the V3 route.

I voted in the poll because it says "What kind of Supercharger kit would you like us to make?". And I voted for roots style because I say kudos to innovation - too bad it'll take a lot of work.

However, I don't think I would buy a SC for my Z.

Rotrex!!! C38 is a great unit
I wish they made a c40 lol ��

California guy here, not going to deal with non-CARB vehicle again.

Needs to be a CARB kit
Needs to have A2A cooler
Needs to have MAF and temp sensors in the right place
Needs to be quiet, get rid of the rattly pulley/bearing noise
Avoid needing a $1000 ECU Tuning package
Avoid needing a bunch of misc upgrades to support kit
Produce a real 500WHP with stock Cat and aftermarket exhaust

Everything else has been done before. Hood is a problem but it's not insurmountable and I think it would look kinda cool. I don't see it cooling the compressed air well though.

We are actually referencing their (c38 -91/92) compressor maps. We understand and made it noted that the limits would be topped out in the low to mid 600's. Increasing the volumetric efficiency of the motor is key. Plus guys have made mid 500's on GTM's kit on the smaller C38 - 81 units which is what GTM sold as the stage 2. The Stage 3 C38 - 91/92 was never sold publicly. One of our customers has the only STG 3 kit ever sold by GTM. Even then the C38 - 81 was not pushed to its limits. The limitation came with not having access to pulleys and transparency in their kit. They used cheap parts including their intercooler. We firmly believe the C38 - 91/92 supercharger has the capability to put a solid 550whp and reach into the low to mid 600's maxed out.

For the Vortech it is going to be debatable on which unit we would have to use based on space limitations. However, if we can fit it we are looking toward the V7 trim if it could fit... But there doesnt seem to be much of any interest in this platform.

When it comes down to it we need to focus on efficiency of the kit and the motor. The more efficient we can make both the more power there is to be had. Once we have tested our kit we will put out official numbers and our ratings will be conservative. We only want to sell what we know everyone will make.

You have to use a water to air cooler. Similar to what stillen did in there kit and what whipple does in there kits.

We will see what we can do.

Can you talk a little bit about efficiencies of each option? I want my engine to last for 10+ years and 150,000+ miles. I'm looking to limit TQ to 350 FT/LBS @ the wheels. One of the reasons I would prefer turbo over SC is because with the SC, the engine needs to produce the extra power needed to run the SC, so I give up some extra wear and tear for a given HP target compared to a turbo. I've read differing views on how much power is being robbed, but that would be good info to have when comparing to turbo and even among the available SC options you've listed here.

Id cut my hood in a minute for a roots type supercharger!!!!!

Option 2 as I'm only looking for something in the 500 whp range, but I got not problem cutting my hood for a sweet blower at an affordable price.


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looks like Roots Supercharger is making a come back.

Well, let me see if I can answer myself. From Whipple's own page.

https://whipplesuperchargers.com/ind...&product_id=98

BTW, Whipple is not a Roots supercharger, it's a Twin Screw.

Um, let's not start taking about "roots" or "twin screw"
There ALL top mount positive displacement superchargers

*They're* also different. I would not want a Roots type system. I also just voted for the Whipple. I think everyone should read up on the differences, and then vote for the Whipple Twin Screw.

I'm not against the twin screw option and its benefits, but cutting into the hood for clearance cuts out a lot of potential customers. So now you have to buy a new hood or be a redneck and run around with a hole in your hood to fit your supercharger.

I liked the stillen hood for the the 350z when i had their top mount sc. I even left the hood on after I took the sc off and went turbo. Got lots of compliments on it too and stood out from the rest of the Z's, Both visually and audibly. Oh how I miss that sweet sweet formula 1 whine!

New hood or hole in hood are not the best options.

http://www.thezstore.com/page/TZS/PROD/50-1988

Given the interest we may do both. The twin screw and the rotrex have their advantages.

Whipple is the way to go!!!!

I believe that the GTM/Gamma Stage 2 came with a c38-91 Rotrex. Whatever you decide to build, make sure it works with the CSC delete kits.

I want reliability. I don't want to cut my hood... A2A is a definite. I want reliability. I am seriously in the market for a SC, and plan on running one in the 2017 One Lap of America. 3500 miles, track days, long commutes, and long days is the norm. I NEED RELIABILITY.

I am sick of losing to 600 HP Supercharged Mustangs. I can beat them on handling tracks, and make it a close race on longer tracks, so I don't need 600 HP, but if I can get 400-450 WHP and RELIABLE, Im in.

this is just too much. 500whp is going to require $k's in support mods, including at least $1200 in ecu and fuel tuning stuff especially if you are going to pass carb which with 500whp you won't you just can't make that power cleanly on this size motor, hell it barely passes smog as it is and you certainly arent getting to 500whp with factory cats. 400+whp and a kit that costs 7k are doable but you are still going to need a clutch unless you want to get your car painted in authentic jesus blood, sancitfied by at least an arch bishop, and pray that your stock clutch, stock fuel pump, stock cats, and stock ecu are going to hold up to double the manufactures rated horsepower. next tell him you want a 30,000mile b2b warranty while you're at it. :rolleyes:

if you go roots go big and make it a power tumor/70's challenger Shaker hood air inlet blower cover thing. <--I was once a "redneck" duct tape and all. http://www.stangtv.com/image/2014/06/Reagan01.jpeg

HAHAHA 'MERICA!

We are taking one of our mustang Kenne Bell 2.3L and seeing what it will take and what design options we have given our space constraints. I hope you guys are excited cause we sure are!

The gamma stage 2 will put over 500 whp with stock clutch and cats/exhaust and its selling for 8800 easy install and very reliable

Will this kit be RHD compatible?

Once you decide what platform your using - when would be a realistic time frame from R&D, development etc to ready for sale? Just want to factor in how long i might be waiting for this kit.

I voted Rotrex c38-92 but thinking about a whipple and the beefier low to mid range for daily driving sounds really tempting, but I would prefer the pull of the c38 at a track day and when I'm getting on it...hmmm decisions.

Out of curiosity are you referring to Pro Chargers i-1 Programmable SC or an earlier model?

https://www.youtube.com/watch?v=fr5Pv9EeOEk

On 2nd thought the Lotus exiges come stock with a twin screw on the 2zz and although ppl do upgrade to the larger eaton style units when you want to make big power the fastest cars tend to use the Rotrex units.
Here's a c38/90 making 604bhp to the wheels on a stroked 2.2l k20a type R motor @20psi
https://www.youtube.com/watch?v=58g0ubJzs5w

They usually track it around 520whp
https://www.youtube.com/watch?v=31yZHSYwF3g

So if they can make 604whp on a 2.2l with a c38/90, surely 600whp on a vq37vhr with the larger c38-91 should be viable.

And are we talking 600whp on pump or e85?

Yeah Rotrex for me at this stage.

Yeah like Jj asked, what sort of time frame will we be looking at until it is released for purachse and will it be made to fit RHD aswell?

Me and a friend of mine were actually on the market for a SC kit and were very close to pulling the trigger on a Gamma Stage 2 kit in the coming weeks, and now I see this thread!?

Very interested in this one but don't really want to hold out forever when I can get the Gamma stage 2 rite now.

Thanks.

Yep, i have one for daily driver, love it, except for summer when heat soak is an issue, but i'll be getting a fuel return kit put on. As it has been said already location of intake is next to the headers wtf.