Guilty as Charged: The Supercharger Mega-Thead

[I<3flippyheadlights]

It does! Now I want one

[— Phatmiata —]

Wuuh? Your new ride has a JRSC?

Yes, the prior own had it installed at Mazda shortly after he bought the car. I was looking at the specs on this from an old Sebring Supercharger ad and it states this is rated at 175hp on the 1.6L motor. Everything else on the car is bone stock though, even the exhaust! hahha But the whine that supercharger makes is pretty damn cool, hahhaa.

[— Grip Driver —]

[— Phatmiata —]

for the long time JRSC owners what kind of hp can I expect to get out of this system? After driving the turbo MINI I still am leaning towards a turbo for the Miata. But I know my current setup is 100% stock, heck the car still has the stock exhaust, so im sure I can get some more hp outta this system, just wondering how much?

[Titus]

for the long time JRSC owners what kind of hp can I expect to get out of this system? After driving the turbo MINI I still am leaning towards a turbo for the Miata. But I know my current setup is 100% stock, heck the car still has the stock exhaust, so im sure I can get some more hp outta this system, just wondering how much?

I get 185 rwhp out of my 1.6 JRSC.

92 1.6
JRSC M45
LINK ECU
RC440 Injectors
LC-1 Wideband
TDR FMIC
150mm Crank pulley
67.5mm nose pulley
K&N cone filter
Racing Beat 4-2-1 Header
Racing Beat Catback

[Miata GT]

Rotrex represent!

[— Agent☣Orange —]

I get 185 rwhp out of my 1.6 JRSC.

92 1.6
JRSC M45
RC440 Injectors
150mm Crank pulley
67.5mm nose
Racing Beat 4-2-1 Header

You got an M45 to fit with a RB header? Is that an NA thing only?

Phat, there's a lot that can be added to squeeze more performance from a JRSC but ROI quickly diminishes as does reliability. Better to start fresh with a turbo build or be happy with an inexpensive and reliable 150ish hp.

Miata GT, nice setup! Make sure to introduce yourself and your ride in our New Members thread. You're not official 'til Winlowe welcomes you.

[Titus]

You got an M45 to fit with a RB header? Is that an NA thing only?

Racing Beat originally created a 4-2-1 header. They discontinued this header not long after the current 4-1 header came out. The 4-1 does not fit under a supercharger without modification* but the old one (like I have) fits fine.

*TDR modified a RB 4-1 header for a 99 with MP62. I was present when the same car went on the dyno 3 times in one day, with stock, JR, and modified RB 4-1. I don't recall the exact numbers, but I believe the JR was about 2 hp over stock and the modded RB was 7 or 8 hp over stock.

[— Phatmiata —]

Mark, what kinda horsepower is that Rotrex making, I'm looking at all my options, both S/C and Turbo.
I really like how fluid my S/C power feels, its like a miata but only faster, but I still love how a turbo gives an instant kick in the ass!

[Miata GT]

Without the restrictor others were making around 185 whp on just the stock setup. I have better engine management and larger injectors but without an intercooler (on order) I have put the restrictor back in. People have claimed upwards of 300 whp on a modified setup but I would be happy with ~230.

[— Agent☣Orange —]

Pardon my unfamiliarity with Rotrex but why not just get rid of any restrictor altogether? Is it there just to stop you from wrecking your internals but would otherwise crank out 300hp?

[shane]

Rotrex represent!

Very nice man, how do you like it, don't see too many of em so curious on your impressions.

I'm trying to decide what route I wanna go, I want low maint of SC, 200ish HP. I have an 01 w/VVTI what would you all recommend?

I like the stealthyness of rotrex and I believe they run well enough w/o an IC.

[Miata GT]

Pardon my unfamiliarity with Rotrex but why not just get rid of any restrictor altogether? Is it there just to stop you from wrecking your internals but would otherwise crank out 300hp?

The problem is the heat of the intake charge, especially now that it is getting hot out. The base kit uses the restrictor to limit the boost to 5psi due to the voodoo-like box that can only provide so much in the way of fueling. During the winter and early spring I was running it uncorked with good engine management and 600cc injectors. I could still do that but the ECU would pull so much timing out it wouldn't be worth it.

I like the Rotrex's stealthiness too. Under boost it is nearly silent. After a lot of consideration, and wanting to keep the stealthy aspect of the car intact, I have ordered an AW intercooler and heat exchanger from Frozen Boost, along with a Mustang Cobra coolant pump. Given the Rotrex is far more efficient and puts out less heat than roots-style blowers the AW intercooler setup should be more than sufficient.

Once that's done I have a smaller pulley waiting and will finally have the car professionally tuned and optimized (now it auto-tunes itself).

To shane: I like the kit but don't like that I feel shafted by Oscar Jackson. The kit was expensive but I bit hoping for the promised cheap upgrade path to a Stage 2 system. I do like the setup and again, like the stealthy nature of the Rotrex.

[shane]

Wait, so Oscar J. killed off the stage 2?

[Miata GT]

Oscar bailed on the whole program, leaving it orphaned.