MR18/MR20 Supercharger kit

[Promise Land]

I have seen everyone talking about not having a turbo kit available for anything but the QR25 Spec-V. Who would want a S/C kit for the 2.0L? I am toying with the idea of buying a Rotrex S/C and making up an intercooled S/C kit for my 1.8L Versa. It shaes the same block as the 2.0L Sentra, so the kit may exactly bolt-on or might need a little change with the tubing. The Honda Fit kits cost $3k, so I think this is a good price for a Nissan based kit. Boost will be kept to 6-7psi hopefully in the beginning to avoid having to upgrade injectors, fuel pumps, etc. associated with higher boost set-ups. Is anyone interested in discussing such an item?

Here is what the Fit system looks like.

[08Sentra]

Looks like a custom set up is all us 2.0's can do for now. If you can toy around with one and develop a kit I'm sure some people will jump on it. I've got about 10,000 miles before my warranty is up and until then I'm keeping the Sentra stock. If you do manage to make one and tinker it to make it work, I'll definitely be interested.

Only concerns are: Fitment, which will probably be an issue but don't mind the work to put this in.

And the CVT, but I believe it can handle those few pounds of boost.
Good Luck.

[carlos15]

i would be the first to buy im pretty sure most of the versa owners would agree it needs a little bit more hp and torque
if your realy serious on making the kit ill be more than happy to let them use mine as a test dummy or for fitment

[PapaSmurf2k3]

Canaan- any reason you're thinking supercharger instead of turbo?

Also, at 6-7 psi, I'd look at at least upgrading the fuel pump. Even with an 8:1 FMU, you'd be looking at fuel pressures in the 88-96psi range... which I think the stock fuel pump would struggle to do, if it could do it at all.

[Promise Land]

just to be different. not sure what to do with it, but just contemplating ideas.

[Promise Land]

sounds like the supercharger kit for the MR18/20 will be out in the Fall. No exact price yet because it hasn't been created. Stock MR18 should go 122 (stock) -> 200hp (+50% hp) easy at 6-7psi of boost. MR20 should go 140 -> ~210hp. Should be OK for manual or auto trans, not sure on CVT.

[bakerboard]

Canaan- any reason you're thinking supercharger instead of turbo?

Also, at 6-7 psi, I'd look at at least upgrading the fuel pump. Even with an 8:1 FMU, you'd be looking at fuel pressures in the 88-96psi range... which I think the stock fuel pump would struggle to do, if it could do it at all.

Probably because supercharger kits are a little cheaper than the turbo kits.

[bakerboard]

sounds like the supercharger kit for the MR18/20 will be out in the Fall. No exact price yet because it hasn't been created. Stock MR18 should go 122 (stock) -> 200hp (+50% hp) easy at 6-7psi of boost. MR20 should go 140 -> ~210hp. Should be OK for manual or auto trans, not sure on CVT.

and this is some exciting news. I would love to hear how the kit acts after 3 or 4 months and then possibly be interested in it!

[bakerboard]

sounds like the supercharger kit for the MR18/20 will be out in the Fall. No exact price yet because it hasn't been created. Stock MR18 should go 122 (stock) -> 200hp (+50% hp) easy at 6-7psi of boost. MR20 should go 140 -> ~210hp. Should be OK for manual or auto trans, not sure on CVT.

Btw, are you making this or is a company making this? If it a company making this, who? and are they going to sell the kit and stuff on their website?

[TOMMY VERCETTI]

Must be nice!

[alperazzoli]

Hey there

now this is good timing. I walk into the forum this evening to find a post on the exact same subject about which I have been exchanging emails today with a supercharger shop here in Brazil.

Let me throw in my 2c:
1) I have this thought that a Rotrex style supercharger has a combination of the turbos' and supercharger's disadvantages, namely the lag on the first case, and 'robbing' engine power would be the second case. Why not a roots or lysholm (screw type blower)? I always thought Rotrexes were more suited to big displacement V8 guzzler monsters than to 4 cyl econoboxes. Did I get it right?

2) someone asks why Supercharger instead of turbo. Some good reasons: a- Low revs boost - the S/C can run boost right from idle, whereas the turbo needs some revving up to pick up enough exhaust pressure; b- Cheaper to install and maintain; c- You don't need to tap the oil pan, at least the Roots type and Lysholm type S/C's have their own oil - not sure about Rotrex; d- Less of a hassle, no fiddling with the exhaust manifold/piping; e- It IS different to the myriad of turbos you see around.

I for one would be totally interested in the SC kit. Bring it on!

[bakerboard]

Hey there

now this is good timing. I walk into the forum this evening to find a post on the exact same subject about which I have been exchanging emails today with a supercharger shop here in Brazil.

Let me throw in my 2c:
1) I have this thought that a Rotrex style supercharger has a combination of the turbos' and supercharger's disadvantages, namely the lag on the first case, and 'robbing' engine power would be the second case. Why not a roots or lysholm (screw type blower)? I always thought Rotrexes were more suited to big displacement V8 guzzler monsters than to 4 cyl econoboxes. Did I get it right?

2) someone asks why Supercharger instead of turbo. Some good reasons: a- Low revs boost - the S/C can run boost right from idle, whereas the turbo needs some revving up to pick up enough exhaust pressure; b- Cheaper to install and maintain; c- You don't need to tap the oil pan, at least the Roots type and Lysholm type S/C's have their own oil - not sure about Rotrex; d- Less of a hassle, no fiddling with the exhaust manifold/piping; e- It IS different to the myriad of turbos you see around.

I for one would be totally interested in the SC kit. Bring it on!

What do you mean by they have their own oil? Do you use this oil only for the S/C?

Also, what if we just used the Honda Fit S/C but used our own piping, etc?

[alperazzoli]

What do you mean by they have their own oil? Do you use this oil only for the S/C?

AFAIK, Roots or Lysholm type S/C's come with their own oil compartment and you really don't need to change it before many many miles (50k? can't remember now).

Also, what if we just used the Honda Fit S/C but used our own piping, etc?

Yes, I'm 99% sure it could be done, lest the Fit's S/C wouldn't fit (no pun intended) in your engine compartment. Which I reckon it would since the Fit's engine bay is quite cramped, sho it would be a compact unit. But, again, the S/C shown in the pic above (the Fit kit) is a Rotrex. Look my earlier post, you'll see I have my doubts on its efficiency. Could be I just have doubts about it just because I didn't research enough on it. Whereas I've done quite some reading regarding the Roots and the Lysholm.

[PapaSmurf2k3]

2) someone asks why Supercharger instead of turbo. Some good reasons:

Oh, I'm fully aware of the advantages and disadvantages of each, but in my eyes, turbos would be more along the lines of what a Versa owner would be looking for... retaining some of the factory efficiency. Also easily upgradable.

[alperazzoli]

Got me on that one. I have to admit the uniqueness factor plays its role on the choice of a S/C over the turbo. I'm totally in for the kit, ESPECIALLY if it uses a Roots S/C which in my opinion is a good trade-off between efficiency & painless install X cost.

[bakerboard]

What do you mean by they have their own oil? Do you use this oil only for the S/C?

AFAIK, Roots or Lysholm type S/C's come with their own oil compartment and you really don't need to change it before many many miles (50k? can't remember now).

Also, what if we just used the Honda Fit S/C but used our own piping, etc?

Yes, I'm 99% sure it could be done, lest the Fit's S/C wouldn't fit (no pun intended) in your engine compartment. Which I reckon it would since the Fit's engine bay is quite cramped, sho it would be a compact unit. But, again, the S/C shown in the pic above (the Fit kit) is a Rotrex. Look my earlier post, you'll see I have my doubts on its efficiency. Could be I just have doubts about it just because I didn't research enough on it. Whereas I've done quite some reading regarding the Roots and the Lysholm.

So, its like a oil pan inside the S/C, that only needs to be changed every 50k miles? Sorry im asking new questions haha. i know nothing about S/C setup and S/C in general.

[alperazzoli]

So, its like a oil pan inside the S/C, that only needs to be changed every 50k miles?

That'd be about right. The Supercharger hold its own lubrication oil inside its own oil compartment (analogous to the engine's oil pan). AFAIK some Eaton models only require an oil change every 120,000km, that would be about every 75,000 miles.

It'd be nice if any of the more technical guys stepped in to answer our questions. I myself have many questions, I'm a layman when it comes to mechanics, although a very interested and researching type of layman. hehe

[alperazzoli]

I found some answers at the website where the picture above of the Fit system was hosted. Turned out to be Oscar Jackson's (from Jackson Engineering) website. Some answers to our questions could be found there:

"The new Rotrex supercharger combines the throttle response of the Roots supercharger with the compressor efficiency of a turbo, but without the lag. And the Rotrex does this without noise, without oil lines connected to the engine, and without the heat common in turbo applications."

Description of the kit:
"FEATURES:
75-Percent HP Increase
Rotrex C15-60 Supercharger
Rotrex Self-Contained Oiling System with Oil Cooler
Hondata/KraftWerks ECU Reflash
RC Engineering 310cc Fuel Injectors
Plug-and-Play Fuel Injector Connectors
Automatic Belt Tensioning System
Recirculating Bypass Valve
Aluminum Intake and Discharge Piping
High-Quality CNC-Machined Brackets
High-Quality Metric Fasteners and Hardware
Side-Mount Intercooler
Carbon-Fiber Cowl
Carbon-Fiber Intercooler Duct"

So, the Rotrex too can be installed without tapping into the oil pan.

[bakerboard]

Is there a sentra around you, so maybe when you make the S/C kit for the versa, you could also test fitment on the sentra??

[PapaSmurf2k3]

Why is everyone so petrified of drilling/tapping the oil pan? That was one of the easier parts to my KA-T build.

[alperazzoli]

Why is everyone so petrified of drilling/tapping the oil pan? That was one of the easier parts to my KA-T build.

I don't doubt you about the ease of doing it. But some of us would like to get the extra punch while keeping the setup as close to stock as possible. From what I gather, removing the whole SC kit in case you decide to take your ride back to stock to sell it or go through inspection, would be far easier than removing a turbo setup. And, you've got to agree, easy or not to tap your oil pan, it's an extra set of tubing/hosing that could go wrong.

Think of the supercharger's own lube system as a more 'elegant' solution.

EDIT: Also, I have only one car. If I had another one, probably I'd leave one of them as stock as possible for daily driving, and would go mad performance tuning the other one. Maybe one of the reasons of your peace of mind in doing the KA-T ? hehe

[Promise Land]

Is there a sentra around you, so maybe when you make the S/C kit for the versa, you could also test fitment on the sentra??

That is the goal. Trying to get a kit out there for the Sentra 2.0, Versa 1.8, and the Versa 1.6.

[bakerboard]

Is there a sentra around you, so maybe when you make the S/C kit for the versa, you could also test fitment on the sentra??

That is the goal. Trying to get a kit out there for the Sentra 2.0, Versa 1.8, and the Versa 1.6.

yay im glad this is actually happening!

[PapaSmurf2k3]

EDIT: Also, I have only one car. If I had another one, probably I'd leave one of them as stock as possible for daily driving, and would go mad performance tuning the other one. Maybe one of the reasons of your peace of mind in doing the KA-T ? hehe

Very true... but then again, I wouldn't be supercharging my only vehicle either.

[bakerboard]

Just wondering...


what is the worst possible thing that could happen if you supercharge your DD? and what are the things we need to keep mantained after the kit is installed??

[alperazzoli]

Very true... but then again, I wouldn't be supercharging my only vehicle either.

You've got a point there!

[PapaSmurf2k3]

Just wondering...


what is the worst possible thing that could happen if you supercharge your DD? and what are the things we need to keep mantained after the kit is installed??

You could lean out your fuel/air mixture, detonate, and throw a rod through your block. You'd need to keep premium fuel in your tank, and possibly upgrade your clutch. Other than that, maintenance would be about the same.

[sentrastace]

i like your mode of thinking. keep us updated