Twin Supercharged Miata Build (56K Beware)
 

Mods move this if it goes somewhere else. It's my build thread, but there's plenty of fabrication going into it.

So I'm starting the build for my 99 miata. It's a 16 valve 1.8 liter cast iron block aluminum head 4 cylinder. I'm putting on a pair of 1.0 Liter twin screw IHI superchargers removed froma mazda Millenia S. Stock the motor made 110whp. I'm hoping to make 300whp and have headroom with the system. I know this is a turbo site and all, but trust me, this build will have the HMT spirit.

Goals are for the car to appear 100% stock when finished. It won't sound stock or perform stock, but it will look stock. The engine will be stock internally. Well, I did a lot of custom head work a while back but the parts are all OEM. Stock valves undercut and polished, reduced S.S radius, etc. Short block is 100% stock.

Here's the 20x12x3 core intercooler mounted between the condenser and radiator. Pipes will exit from the top inside the engine bay. No pipes hanging down below the car. Can't see the IC with the bumper installed either. All factory plastic under tray ---- fits with no modifications.

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Adapter I made in a lathe. This will bolt into my SC pulley that goes on the crankshaft and will spin the trigger wheel for my ignition system. Using a 36-1 wheel and EDIS with Megasquirt 2 V3.0 standalone.

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Made the flanges and outlet things for the SC's. They bolt on and have a 2.5" pipe coming out of the discharge.

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Made a flange to bolt to the intake side of the head. Gotta open up the ports still.

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Then welded some U shaped things on it.
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And two days later...
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I have many parts for the car. The coldside SC bracket took a while, but I knew it would. Gonna start on building the intake manifold tomorrow. It will be between the SC and the head.

Re: Twin Supercharged Miata Build (56K Beware)
 

Not bad the build looks good, post some pic's of the car.

Re: Twin Supercharged Miata Build (56K Beware)
 

Had the car 2 years and these are the only two pics I have. Gotta get some better ones soon.

Ain't she cute? Car will look just like this when it's finished.
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Re: Twin Supercharged Miata Build (56K Beware)
 

man if you dont mind me asking what exactly the point in running dual superchargers. i thinkits cool and all i just dont see the point of it. i guess maybe have different sized pulleys on them so one will push alot of air in the low rpms and one will pump it out at higher rpms. if thats the case then you can disregard my question. but good luck

Re: Twin Supercharged Miata Build (56K Beware)
 

for baller status, duh

Re: Twin Supercharged Miata Build (56K Beware)
 

wheres the second sc going? i dont really see room for it....

Re: Twin Supercharged Miata Build (56K Beware)
 

have you done any calculations on the pulley ratios or the calculations for the final boost is going to be?

Re: Twin Supercharged Miata Build (56K Beware)
 

Where is the turbo going? >:D

Re: Twin Supercharged Miata Build (56K Beware)
 

That looks pretty sweet so far. Will those superchargers even be able to make 300 whp though?

Re: Twin Supercharged Miata Build (56K Beware)
 

This may sound stupid but it the second SC going to be on the exhaust side?? with the inlet being exhaust fumes and outlet of sc going to exhaust??

Re: Twin Supercharged Miata Build (56K Beware)
 

You get a A- for effort, but it seems futile that all the effort is going towards two blowers... 1 Turbo would be much more effective... Fabrication, time, and financial wise. Why wqaste all the effort.... ---- even a small t3/04e will get you your goal, look cleaner, not be cluttered, and far less ------y going on... Im all for different... but this... I dont know man... God luck though

Re: Twin Supercharged Miata Build (56K Beware)
 

LS1 swap would be faster :P

Re: Twin Supercharged Miata Build (56K Beware)
 

Second SC is going on the exhaust side above the header I haven't built. These blowers are twin screw SC's, which are more efficient than a roots blower. Plus they're 35 bucks each at the junk yard. :6 SC hardware stuff will be labor intensive, but not too costly for the HP capablilty it will allow. How much does a 500whp capable turbo seutp run? And then it would take forever to spool. Both SC's will be pullied the same. The outlets will merge into one 2.5" pipe and then in and out the IC and to the intake manifold. They will spin 1:1 ratio with the engine. ;D Course I can alway s pulley up. These will make up to 29PSI, but are pretty efficient up to 22 PSI. Problem is one SC won't hold 22PSI to redline unless I pulley it to spin 20K snout speed. It wouldn't hold up at those RPMs and would blow a lot of hot air and pull a lot of power from the crank. Two should actually be more reliable, as they will spin slower and run cooler. Also two will use less HP from the crankshaft above 250whp as opposed to 1. Ideally I'd use a larger 1.8L SC or something but these are cheap and I wanted to see if I could do it. Many people talk about putting a millenia SC on there car. Nobody ever does it though.

Re: Twin Supercharged Miata Build (56K Beware)
 

superchargers are gay dude...


SRSLY,


seems like ALOT of work for the performance gained... DOnt expect a shole hell of a lot of people to think differently.... Dis is HMT nukka

Re: Twin Supercharged Miata Build (56K Beware)
 

It is a lot of work for the power gained. I agree. Just doing something different. I've had a couple turbo cars and didn't like waiting for boost. No doubt I could have turbo'd it quicker and cheaper.

So I'm working on building a ghetto intake manifold. I cut a U bend in half and am welding the bended end to the flange. The pipe will turn and point up beside the blower. I'm thinking I'll weld little pipe stubs to a piece of 3" pipe, then clamp them to the other pipes rather than weld it all out. That way a small variance won't matter and I will be able to clean up the underside where the runners go into the plenum after welding. Sound good or no?

Re: Twin Supercharged Miata Build (56K Beware)
 

How much to ship me one of those $35 superchargers?

Re: Twin Supercharged Miata Build (56K Beware)
 

I'm all for a forced induction miata but....I just don't get it. Looks like a bad idea. Good luck though. Hopefully you can get it running and prove me wrong. :y

Re: Twin Supercharged Miata Build (56K Beware)
 

x2 man, doesnt seem like its going to work the best with two superchargers but id love to be proven wrong on this. make 300 hp and take vidz of the drifitng

Re: Twin Supercharged Miata Build (56K Beware)
 

I don't see it being worth it efficiency wise.
But its nice to see something different.
Good luck!

Re: Twin Supercharged Miata Build (56K Beware)
 

LOL at TSO Pwning Chicken

Re: Twin Supercharged Miata Build (56K Beware)
 

My car gets into boost at a lil over 2k rpms...that doesn't seem like very long to wait...but that's just me.

Re: Twin Supercharged Miata Build (56K Beware)
 

1-3 full boost at 2800, 4-5 full boost at 2600 for me :)

looks like im gonna break 28mpg this tank.. we'll see

Re: Twin Supercharged Miata Build (56K Beware)
 

i dont see it making over 200whp.... ----, a jackson racing super miata (i know gay roots) makes what 120hp at the wheel?

Re: Twin Supercharged Miata Build (56K Beware)
 

I was so hoping this was going to be a cool thread from someone that knows something.

Re: Twin Supercharged Miata Build (56K Beware)
 

I have a millenia supercharger sitting in the garage that i've never messed with in a long time, lol. I have never found solid information as to what size the blower is. I'm guessing its 1L or smaller. running two might be pretty interesting. cramming ~2L of air per rev even at 1:1 ratio is going to make insane manifold pressure on a 1.8L. I hope you run a nice exhaust system to help it breath, otherwise I see instant carnage in your near future. i'm not sure how well the BP will take to high cylinder pressures at low rpm's? either way cool project and i'm interested to see how it turns out.

Re: Twin Supercharged Miata Build (56K Beware)
 

It's a 1 liter displacement twin screw manufactured by IHI.

Exhaust will be a custom header with 2" primaries to a 3" collector and 3" to the rear. It should make 200 whp with 2 SC's and a 100 shot direct port.

When I say I don't like waiting for boost...

I had a 300 zx turbo. It took till 3500 and then bam, full boost. Nothing below 3500. I've rode in other cars that were turbo and I know boost onset is low, but full boost is not. Yeah you might make a pound of boost at 2K. But a good size turbo to support 300+ whp efficiently will have lag. Most miata guys running t3/t4's are waiting till 4-4.5K for full boost. It would be fast on a track, but I want power down low where normal people operate there vehicles in daily driving. I know this is HMT and I'm not bashing turbo's and all that ----. Just doing something different HMT style. Boost is better than no boost.

Re: Twin Supercharged Miata Build (56K Beware)
 

take away the 100shot...

and youre back to 100hp

Re: Twin Supercharged Miata Build (56K Beware)
 

but power below boost is not needed
i mean if you are driving fast then you will be spinning the engine fast enought for boost
and when your driving normally you are out of boost and thus not making more power than needed and as we all know the more power you make the more fuel you need so you can take a small engine that gets 30-35mpg and turbo it and double the hp and as long as you are out of boost get damn near the same fuel millage and then when you want double the hp just drop a gear and hold on

and i think running the superchargers in a push pull configuration sounds like the dumbest thing i have heard on hmt (and i have said some stupid ----,lol)
i mean if you are sucking the exhaust out then you are going to be making negative pressure (vacc) on the oulet of the engine and if there is any valve overlap you will get allot of blowby witch will make it a bitch to tune and shoot raw fuel out the exhaust(and fuel is expensive)

as for running 28psi and only making 300whp?
what the ----? (on top of that you even said the supercharger is enefficient at 22psi and above)
i mean a t3/t4 would make 300whp at like 15-18psi (depending on a/r ofcourse)
maby even less with a really good tune
as for cheeper? i doubt that i mean you could have built a dead reliable 300whp turbo setup for under $1000
and it is more reliable,puts less strain on the engine, and is not gay


have you even thought of howmuch parasitic loss you are going to have with spinning those 2 superchargers that fast?
i would guess it would be somewhere arround 18-40hp


like it has been said before prove us wrong about your idea but i honostly think you should really think long and hard about what you are doing and take a look at it in a different light
because it's not even innovative it's just semi retardid sounding

Re: Twin Supercharged Miata Build (56K Beware)
 

in for the updates. i dont care if its worth it or not, i like seeing things that are different

Re: Twin Supercharged Miata Build (56K Beware)
 

+1 I want to see this thing work!!!

Re: Twin Supercharged Miata Build (56K Beware)
 

Bitch quit rolling bullshit tiny ss engines with oversized turbo's. Get some mother ------- displacement dumbshit.

Re: Twin Supercharged Miata Build (56K Beware)
 

I don't understand what is with these Mazda queers, "OMG BOOST LAG!".

It's called a powerband, stay in it. Beyond that dropping boost between shifts shouldn't be a problem if you have a well designed manifold, which is what your fab effort should be going into.

Please update with "superchargers were the only thing that could make my miata even more gay, I'm going turbo."

Re: Twin Supercharged Miata Build (56K Beware)
 

Seriously what the ---- is their problem??? Buy a tiny ass god damned turbo and run that ----??? They're 8500rpm engines, factory. Bitch buy god damned clutch and stop launching at 4000rpm and shifting at 6000rpm.


Then they wie about lag... God damn it lag on an 8500rpm engine would be no boost till 4500.
Speaking of which... Unless you have an NC (which you dont!) you can't put more than 250 through the tranny to begin with so BUY A GO DAMNED TURBO TO MATCH IT.

Holla!

Re: Twin Supercharged Miata Build (56K Beware)
 

YOUR SO ANGRY!
WHY ARE YOU SO ANGRY RIGHT NOW!

Re: Twin Supercharged Miata Build (56K Beware)
 

Had to get a physical for my new job. Didn't use enough ky. :'(

Re: Twin Supercharged Miata Build (56K Beware)
 

I like it because of the people that don't like it. Forge ahead my man! :D

Re: Twin Supercharged Miata Build (56K Beware)
 

We also don't like being fucked in the ass by burly men, looks like you go against the grain on that one too.

Re: Twin Supercharged Miata Build (56K Beware)
 

Angry Imitating black man

Re: Twin Supercharged Miata Build (56K Beware)
 

I'd Tso ---- that chick'n your avatar.

Re: Twin Supercharged Miata Build (56K Beware)
 

In short it seems some are lacking in reading comprehension and fundamental physics.

I never said I was running a SC to suck out exhaust and all that horse ----.
My car makes 140 flywheel HP stock. About 110 at the wheels.

As I said: That's what I meant. I don't ease around trying to maximize gas mileage all the time.

I said the SC can make up to 28 PSI, but it's pretty efficient to 22 PSI. I didn't say I would boost to 28 PSI and achieve 300whp. This is a reading comprehension issue.


You bet. Care to elaborate? What's a SS engine? Wasn't wanting a oversized turbo. Your post makes no sense to me.



I don't want a small turbo, or any turbo. Never said I did. BP series engines don't turn 8500 my friend. The cylinder head does not suport high RPM flow. The engine is already undersquare. Oil pump gears break from harmonics and crank flex at high RPMs. Torque loading and shock loads are what break the driveline, not raw HP numbers. But I agree many people suggest 250whp is the upper limit of "safe" with some mechanical empathy. This topic is clearly debatable though.


Anyways if someone would like to put together a valid argument I'm happy to hear it.