Ok, before you all laugh.. Bear with me.. I got a turbo off a 1st gen eclipse for free. I planned on turboing my car next summer with a stock TII turbo and manifold. My question is, can I use this turbo, or is it too small? I mean, technically, I know its possible to use it. But will I over spin the turbine blades? I plan on running an intercooled 5-8 psi of boost into my N/A engine with 68k miles. The thing I like about this small of a turbo is that, if I can get it to work, it's perfect for my uses. Small, light, VERY fast spooling turbo with low boost pressure so as not to blow my engine. What's everyones thought on this?

 

The 14b is good on DSM's for about 18psi...

But i dont think the flange is going to bolt to any stock rotary manifold.

 

I'm no expert but I would think running a 89-91 T2 turbo would be a better match for your car. get a 2.5 in full exhaust, ( to keep the boost down to the 5-8 you want) port the wastegate. Im not sure about the mitsu 2.0 turbos but to me if they were designed to run 14 stock and the T2 turbos were designed to run 6-8 (?) stock that the T2 turbo would be more efficient at the lower boost pressures that you are looking at running.

 

Don't stock DSM turbos run out of steam at anound 6800?

And that's on a 2l... a 13B moves as much air as a 2.6l, plus we have our wonderful forceful exhaust pulses. Have a feeling the turbo would be way too small, would be really inefficient trying to flow enough air to feed a 13B. Dunno for sure without seeing a map, so this is all common-sense conjecture.

 

Well.. Like I said.. the turbo was given to me for free... And it seems that a ghetto rig to get it to work would be cheaper than to buy a rebuilt stock TII turbo. And if I have an adapter of some kind made to make it work, that leaves me the option of upgrading to a 16G turbo which would bolt right up and flow better. I'm trying to do this as inexpensively as possible, yet with no compromise for safty (fuel system and intercooling). What I'm looking for from this turbo, no not huge power. I'm looking for a replacement for a supercharger. This small of a turbo seems like it would spool almost instantly. And I'm only looking for 5-10 psi up to 7k rpms. I know it probably wouldnt be as efficient as a TII turbo.. But those are also a few hundred dollars... Any thoughts?

 

well the answer has been danced around so far but the real thing is it will run out of air by 6k,ish. The car would have killer TQ, it would be fun for running around town. We did this to a SOHC 2.2 honda (accord) and it made 211ftlb at 3k but went down hill pretty bad after 5k peak hp was only 160 (this is to the wheels) The extra flow needed for a rotor would only make this worse.

 

Thanks for the responses.. I think I'm gonna try it.. I made a quick little 3D model to see how it'd look.



I think I'll try a costom manifold too using the RB header flange. Like I said, I'm looking for a turbo comperable to a supercharger. I want torque and no lag. I think it will work...

 

Sounds like fun. I'd really say go with the stock TII unit, but the eclipse with a 16g compressor upgrade might be fun.

Try to give the car as much wastegate as you can, backpressure sucks and with that small of a turbine side it's going to be bigtime restrictive up top in the RPM range. But if you had monster wastegate flow and could still control boost, you should have the quick spool and when the wg starts to open you will not choke your motor past 5k.

Post details if you get it thrown together!

(You CAN score a working 87-88 turbo and manifold for <$200...Sometimes you can find a running wrecked TII for $150. I've found 1 and I'll take another 15 at the same price)

 

Ok.. So I have another question.. Now that I've descided to use the T-25 for now, with a possiblity of upgrading to a 16G. What do you guys think of the fuel system I have planned out for it..

RP Competition Fuel Pump = $264
Apex Super AFC (Digital) = $349.95
2 ND Top Feed Injectors 720cc/min = ($122.72 each) x 2
SX fuel pressure regulator (-6 ports) w/o fuel gauge port $164.95

I plan on first running my stock primary injectors and 720cc/min injectors as secondaries (until my friend gives me his 550s for primaries). What I need to know is, is the fuel pressure regulator required? To be quite honest, I'm not sure as to what it does. From the name itself I'm guessing it just regulates the fuel pressure to keep it consistant. Is this needed?

Thanks for everyone's help.

 

Wait?

Your using a T-25? You said first gen DSM...

Theres a big difference. T-25's are absolute crap, even on DSMs they run out of steam and just super heat air at anything higher than stock boost!

If you've got a t-25 the only use for it is a door stop, or paper weigth!!!

 

Yeah, the stock RX-7 turbo is too small as it is, and you want to go SMALLER?

You're going to be WAY overheating the air, plugging up the exhaust, and generally making no power while using a lot of fuel to do it, if you don't kill your engine with detonation, overheating, or exploding the turbo from overspeeding first.

From the money you want to spend on fuel system upgrades, you're probably just better off getting a stock replacement or mild upgrade turbo and using the rest of the money to start the upgrade path.