r0to-D3wd

hey there guys denton here, i have my 83 fb 12a stock. i have a 48ida currently running on it with k&n filter syystem. stock headers (changing to rb headers, or pacesettler soon) i want to turbo my little 12a beast, and am wondering if theres a kit i can buy and if there is where to find one? or what turbo will work best?? im just looking for maybe 250-300 hp. nothing huge. itll be my first boosted car so i want to get a feel of it before i go ***** out! loll. iv looked on ebay and the only turbo they said was compatable wiith my fb was a gt45 s4 .. i think? but it wasnt a kit. and about me manifold piping/down pipe. intercooler ect.. and also how would i hook up my oil feed line? my omp pump is off and currently mixing. any replys will help guys! im new to this but iv been reading every day so im learning pretty fast about rotorys. thanks!!!

lduley

iTrader: (1)

There really isn't a kit, you'd have to piece it all together yourself. You can't just slap a turbo on and go....well....you can if you want to blow the engine

My advice is look at build threads in the 1st gen section

erick31876

iTrader: (8)

I would start by reading the first gen faqs, there is a ton of info/threads listed there. Also search for build threads, that's what I did before I started doing my swap

r0to-D3wd

thanks for the reply guys! okay so check out some build threads first? now would i have to do streetporting, bridgeporting ect... to put a turbo on my car? but i check some threads out now! thankis

misterstyx69

iTrader: (142)

im new to this but iv been reading every day so im learning pretty fast about rotorys.

R-O-T-A-R-Y...say it with me now...sloooooooow.....! (hey,I gotta have some fun you know!)

KansasCityREPU

iTrader: (9)

You can do a blow-through but nothing close to 250-300 hp with a 12A. Maybe 150-160 hp.

r0to-D3wd

What's a blow through?

freddyrx3

iTrader: (14)

Call Goopy Performance. He sells a complete bolt-on kit. Tell him i sent you. Good luck

Evil Aviator

On a blow-through system, the turbo feeds into the carb. The advantages are that it allows for an intercooler, and it has the potential to run pretty well at idle and wide open throttle. The disadvantages are that it requires a compressor bypass valve, a boost-controlled fuel pressure regulator, and modifying the carb for high pressure air.

The other type is a draw-through system, in which the carb feeds into the turbo. The advantages are that it doesn't require a compressor bypass valve, boost-controlled fuel pressure regulator, or carb mods for high pressure air. The disadvantages are that it is prone to icing, has worse throttle response, worse cold starting, is difficult to tune, and can't utilize a proper intercooler. I would tend to avoid this system unless you are so broke that you can't afford a decent system, in which case you really shouldn't be spending money on a turbo anyway.

A better option is to convert to electronic fuel injection (EFI) engine management system (EMS) such as Haltech, Megasquirt, etc. This allows for fine tuning of both the fuel metering and ignition timing throughout the entire rpm range, and it eliminates the problem of the carb venturi reducing boost pressure. You can use whatever type of intercooler you like, and a compressor bypass valve (or blowoff valve) is optional. The disadvantages are that it requires an EFI fuel pump, EFI pressure regulator, EFI fuel lines, EFI fuel filter, fuel injectors, throttle body, maybe a crank trigger and other parts, not to mention the EMS itself.

Honestly, the best option is to sell the car and buy a turbocharged RX-7. This would be the cheapest and easiest route to a turbo RX-7, and it will come with EFI, strengthened drivetrain, and other goodies that your current car does not have.

r0to-D3wd

Hmm. Well I have a big webber 48ida on there now . How much modify ing will I have to do to the webber to go the blow though method? Since its not the stock Nikki, will it not hold pressure it's self? Just asking cause you see a lot of old v8s turboed and supercharged with the food's webber on them.. thanks again for the info!

WANKfactor

iTrader: (1)

There were guys getting decent power and ET's with a T04 drawing through a Webber here in Australia-land in the 80's.

Personally I would go a TII swap and sell the existing donk.

r0to-D3wd

Yeah well there's just not the market here where I'm from in tennesse u.s to find a lot of mazda rx7 parts . Especially a tll . So guys where putting a t04 and doing a draw through on there webbers? Did they have to modify the webber quit a bit?

WANKfactor

iTrader: (1)

WIm not sure the ins and outs of it, it was before my time and was never a common thing. Id imagine a lot of trial and error and developement went into it and was obsolete as soon as EFI became more easily available.
Pretty cool though - ill see if i can find anything on it next time im at a computer.
Theres a guy on here doing boost-prepped Nikkis which would be easier and he will be able to steer you in the right direction.
The other thing that might be worthwhile looking at is a nice shot of NOS if the set up you have already goes pretty nice.

r0to-D3wd

yeah, i appreciate it if you can. but idk about the nikki. i have a damn close new webber. so i would hate to investe and buy a nikki when i could take that money and apply twords the turbo setup. idk.. its no rush for me i just want to have a game plan so when summer comes around i can start doing things i want to her.

WANKfactor

iTrader: (1)

Ok, i had a quick search, couldnt exactly find the turbo weber cars i was looking for, but seriously, the easiest way to get the extra horses would be to run a nice exhaust, intake, tune and a NOS kit.
Next closest thing to a turbo kit is something like this https://www.google.com.au/url?sa=t&r...XheBg81xDoaepA
and finally, a T2 swap will yeild the best results, probably about the same amount of work but with less headaches (relatively, LOL), and more (much more) potential should you want to modify further) plus you get a the t2 gearbox and everything else. Keep an eye out for a wrecked t2 or a Half-cut from the Japans. You can always sell the stuff you dont end up using.

That said unless you have a good idea what you are doing and are confident in fabbing mounts, manifolds, new fuel system, ect i wouldnt do more than bolt-on stuff hence the Nos recommendation, where you can keep your weber and racing beat exhaust and leave black marks happily ever after.

diabolical1

iTrader: (3)

as was stated before, there is no "kit" available today. you will have to make a plan and execute it.

nothing huge? you're looking to make 2.5 to 3 times the original power of the engine. that's not insignificant ... or simple (regardless of how it seems at times).

you should probably go about setting the car up N/A first. if you're really interested in working with the Weber, get some parts (jets, venturis, etc.), a decent exhaust system, spark plugs and a notebook and get to work! you may be surprised at what you can turn the car into. if you're not committed to learning how to tune a carburetor, then go EFI, which would probably be a better move for a turbo system anyway.

that said, if you're going to go ahead with this - and it sounds like that's your intent - i have grown rather fond of the builds that use the Nikki and the OEM Hitachi (from the T2s). there are a few build threads that you can use a blueprint and they're not hard to find in the Gen I section.

you can build on the Weber just fine, but it will have to be boost-prepped just like anything else, then it will have to be tuned as well. i would dare say that as of right now, you would get much more support on the board for a Nikki. it's your choice though. also, forget the draw-through systems. they're time is over!

forget the horsepower numbers! i have no idea how much power they can yield in an optimum setup, but i'm sure it's much more than you need to get into serious trouble - legally, physically - take your pick. if this is one of those cases where the number is significant for some bet or vendetta, then do like what Evil Aviator said and sell the car.

i don't even know what any of that means. virtually any turbo is "compatible" with any car with an engine. the question is if it's worth using or not. everything you need to make the turbo work on this car will be custom, so you need to be one with that fact from the start.

personally, if you're hell-bent on turbocharging the car, i don't see the point to potentially wrecking what i presume is a good 12A to do it. you obviously have the Internet, so it doesn't much matter what you have local to you, but for the record, you do have a resource in-state. you can get a factory turbo 13B and build the car around it. it will give you what you said you want (the power level you quoted) and with fewer significant drawbacks (carburetor as a center-point, less custom parts, easier to replace engine parts, etc.).