Yeah, the build will be well documented, however alot of the work won't be done by me. As much as I would like to, I probably won't be able to finish it on my own. I'm in the Air Force, currently stationed in Italy. I already have the car back in the US, sitting at my parents house, and I'll be coming home on leave to start the project in a nearby friend's garage. His father has a huge shop, lift, tig welder, sandblaster, everything, basically my dream garage, and he's done ALOT of custom car building, so I trust him to complete the job. I had the motor/tranny delivered to his shop. I'll do as much as I can on my 30days of leave, and on their schedule, but he will probably end up completing it for me once I go back to Italy.

It's gonna be alot of work, including hacking and rewelding a new transmission tunnel, custom driveshaft, MK1 Supra rear end, etc.... should be fun though

 

Found this completed pic of another install (N/A and not mine), so I will have a decent amount of room to work with, but I don't want a huge turbo or an intercooler, I want to keep this turbo setup as simple as possible.

 

umm, go with the IC and powdercoat it black. u wont even be able to tell. i had it like that on my prelude and nobody knew i was boosted until i blew off. it'll look just like a radiator..as long as no one can see ur IC piping..

you could also weld a pipe from the blow off valve to go into your exhaust piping so that people wont even hear the blow off sound.

with that..the car should be into the low 13's high 12's. u should be hitting close to 300 whp in a light car.

 

If you plan on running low boost, the stock compression should be fine. The high compression would spool your 14b or T25 really quick. Water injection is a good idea too, despite the low boost. And the EMS is a very wise choice also. Sounds like a nice project, keep updating.

 

Thanks for the replies. Believe it or not the AEM EMS will actually make things slightly cheaper in the end, and much less of a headache.

Empathy, I do agree that painting/powdercoating the intercooler black is an excellent idea, however it's not in the cards currently. Right now I'm trying to keep this very simple and inexpensive, even if I used a small side mount intercooler, that is still that much more piping I need to make. For now I will go WI, if I decide to go for big power later on (not likely) then I will add an intercooler. I do appreciate the suggestion though! Also, the BOV (actually CBV) will be routed back into the intake, I'll be using a 1G DSM CBV, because I already have one laying around, it works great, and no need to adjust it

Also, with the added weight of the turbo system I'll be messing with the balance of the car, I'm trying to keep the weight from the turbo setup as minimal as possible. An intercooler setup would probably add close to 30-40lbs. WI would add about 15lbs.

How about the F20C injectors? Running low boost and WI, would stock injectors be fine? Or should I go ahead an order slightly larger injectors as well?

 

As for injectors, stock flowrates are 360cc and just barely hold up at the top end. If you're going to boost low, go at least 550cc and tune injector pulsewidth with the EMS. If you're boosting higher, look into 720cc.

 

you could always do a v-mount intercooler setup... looks like you got plenty of room in there...

 

Having a difficult time locating a manifold that will fit a Mitsu turbo. Anyone know of a site that sells an adaptor plate? Or should I just go with a small T3 turbo? Any reccomendations?

Not looking to get more than 300 flywheel horsepower (remember, 2100lb car, and I wanna keep this thing controllable, lol)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by firefighter81 &raquo;</TD></TR><TR><TD CLASS="quote">
Not looking to get more than 300 flywheel horsepower (remember, 2100lb car, and I wanna keep this thing controllable, lol)</TD></TR></TABLE>

if thats all you want.. why not go all motor?

with a good I/H/E setup and ems for tuning you'll be able to get 40+rwhp easy..

 

See, this is where my S2000 noobishness (lol) comes in. All I keep hearing from people is the only way to get power and torque out of these things is forced induction. I looked into ITB's but they were $2500+.

So it's fairly possible then to get 300hp all-motor and still keep it reliable? What about torque? I'm looking to make a pretty flat torque curve, at around 180-200lb-ft at the wheels, can this be done all motor for without sacrificing driveability?

 

if you want that type of torque you're going to have to go with a stroker kit... there's a few out there.. from a 2.2L 2.3L 2.5L

 

I saw a couple dyno sheets on this site of S2K's running about 7psi making a little over 200lb-ft torque, on an otherwise stock engine. Which is one reason I was interested in FI.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by firefighter81 &raquo;</TD></TR><TR><TD CLASS="quote">Having a difficult time locating a manifold that will fit a Mitsu turbo. Anyone know of a site that sells an adaptor plate? Or should I just go with a small T3 turbo? Any reccomendations?

Not looking to get more than 300 flywheel horsepower (remember, 2100lb car, and I wanna keep this thing controllable, lol)</TD></TR></TABLE>

Look into the lovefab mini-me manifold. I'm sure Cody could make you one with a flange that would fit a mitsu turbo.

6-7 lbs would probably take you past 300 flywheel hp already. time for some fatass tires.

 

In a 2100 pound car you will be more then satisfied with the all motor power and close gear ratio of an s2k...iof you are looking for quick power i would get the ricks 4.77 gears. Not only making use of the potent power the f20c has, but keeps you in the beautiful powerband.

Also, with forced induction its hard to keep a good setup under 2 grand with injectors, manifold, intercooler etc. I feel like youd sell some of the parts short just to get them in the car. While FI would be SO BLING on that type of swap in that type of car, you would be more then happy with simple reliable power mods that is out there.

If it were me:
ITBS with the EMS and the 4.77.

Putting an F20c in an AE86 is similar to a k20 in a civic hatch. i dont know if you are familiar with that type of setup but the power to weight ratio make that car an easy 12 second car 11s with ITBS (there is a link around here somewhere) Anyway... in the end it comes down to doing what you want....so read up, and good luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by firefighter81 &raquo;</TD></TR><TR><TD CLASS="quote">I am not looking to spend $1500 on a turbo (like the GT30R, disco potato or whatever the hell they call it), so as an avid DSM lover I'm thinking about using the 14b from the stock first gen turbo DSM's. It's a great turbo, spools quickly, and will more than cover the 6-7psi I want for this application. Also considering the slightly smaller 2G DSM T25. I can get a freshly rebuilt 14b for $200 and a T25 for $150, which is the main reason I am looking at them.

Does anyone have any objections or suggestions to this idea? I'd like to get an extra 50-75lbs of torque from this setup, and I would only be spending maybe $2000 max (manifold, turbo, water injection, piping). Does this sound feasible? I know turbo, I know water injection, what I don't know is how the F20C responds. So I could use some advice from you seasoned S2K guys! </TD></TR></TABLE>

The f20c responds amazinly to boost. There is 400+whp s2000s running around on pump gas and 12psi of boost.

With that in mind, you can spool a pretty meaty turbo with our motors. A 14b/t25 is just WAY to small. You would spool that turbo at idle. It could make some really big torque numbers, but you arnt gonna make alot of power. The peak power of a t25 is just about what our motors make stock (~200whp), and yea i know you can push 250whp with a t25 but thats on race gas (which you would need because at that level its making SOO much heat).

Our lovely F20C is a 11:1 motor, it doesnt like heat. Its import to pick a turbo which will supply the air needed and do it without heating everything up too much. Pushing a 14b/t25 to almost peak is just going to make way to much hot air.

With that said, id look into something a little larger. Say an EVO8 turbo, big16g, 20g, t3/t4, gt30, something along those lines.

Good luck!

liam

 

Why not look for a secondhand supercharger kit (eg comptech/vortech) ?
It would be a much easier install and wouldn't require all the fabrication, and there are plenty running around without any problems.

For low boost it just seems like an easy option. I guess the hard part might be finding somebody selling one for the price you want.

If you want to build it yourself - go for it. It sounds like you have thought things out pretty well.

 

i don't see much room up front to slap on a supercharger, seeing as how thats usually where its mounted.

 

If you are goin to do this. I don't think you should go the cheap way at all. I would do it right the first time.

 

honestly.. what you're looking for.. .i think can be settled with .. a good combination of I/H/E aem ems and possibly go with itbs instead of an intake if you want to go that route.. and get a differnt final gear.. 4.57 or 4.77