86gxl_fc

i cant seem to find the actuator, i actually dont think i even got it when the manifold was mailed to me to be hones...
i was wondering if there would be any problem on just wiring it open?
would i be able to use the 5/6 port actuators in place of the missing wastegate actuator, i've got a couple spare that i may use?

RETed

Wastegate (actuator) is on the turbo, not on the turbo exhaust manifold.


-Ted

Delphince

If you wire open your wastegate, you're probably not even going to notice you have a turbo; it'll take forever and a day to get any boost.

Aux. ports fully activate with 2.1 lbs of pressure. If by some miracle you were able to attach one, the throw would be different, and you'd be bleeding off your boost really early and then start to creep like crazy when you finally started getting somewhere. You'd probably have better luck using a water pump for a supercharger...

86gxl_fc

****, sorry guys lol. i just looked at it closer.
well i was looking and the mating plate that goes between the turbo and the engine. it has a little gate thats just swinging, i'll post a pic of it in a second.

RETed

You're probably talking about the twin-scroll acutuator.


-Ted

Craiger

iTrader: (1)

It would help if you stated what turbo and manifold you are useing and what car it is going on.

86gxl_fc

its the manifold from an 87 TII, would i be okay wire-ing it open?
its going on an s4 NA with stock TII injectors/ecu/fuel pump running stock boost on a stock exhaust.
i'll be running it directly to the throttle body from the turbo up until i can get ahold of a decent FMIC.
i'll take pics as soon as i put it on

Killert2

NOt to jack this thread or anything but when is the actuator supose to open? because i think mines stuck. There was one under the actuator that was stuck and i freeed it up but i dont think my wastegate actuator is working

Craiger

iTrader: (1)

Yep, definitely the twin-scroll acutuator your looking at. I think it is pretty common practise to wire it open... or just take it off completely!!!

On a side note, I think that running the turbo without an intercooler is a bad idea... espicially considering your going to run the stock ECU which runs the car fairly lean as it is. Heat+lean=detonation+rotary=goodbye engine.

86gxl_fc

so the TII ecu actually runs lean?
its fairly cold outside due to winter comin around, would i still need an intercooler ASAP if the outiside temps are considerably lower than normal?
like i said before, i'm getting one, i just cant get ahold of one locally.
i really dont wanna buy the ebay intercooler crap, i'm afraid its not made right, and may do more harm than good.

is there a particular size i should get?

RETed

No, it's a combination of bad / crappy / old wiring that causes hugh voltage drops that doesn't let the fuel pump work it's most efficient that causes the fuel to lean out.


-Ted

86gxl_fc

oh, that makes sense.
thanks guys.

Craiger

iTrader: (1)

Let me re-phrase. The stock ECU for an FC runs on the lean side of what is acceptable, even with good wires. This is good in that you will gain power and it will help with emmissions, but bad because it is at higher risk of detonation. As Ted said, the possibly poor condition of the 20 year old wires will cause the voltage drop and actually make it run more lean than acceptable.

In the cold temp's you MIGHT be able to get away without an intercooler, but I think that would be risky. Come summertime, no intercooloer=Boom!!!

86gxl_fc

oh yea, i believe it will go boom!
by temporary, i mean a week or two until next paycheck to be exact =D

Circuit Theory

iTrader: (52)

I would worry more about running the car with no intercooler for a week or two more than I would worry about buying a cheap ebay intercooler. you can get a stock intercooler for 30 bucks usually if you look.

So to get this straight you are running a 87 TII turbo on an 86 NA with stock ecu and harness etc???

Let the car sit and do some research until you have the money to do it right as well as studying about what the best options are and what parts you will need.

(PS: I give this car another month before it is posted up as blown, unless the op does his research)

86gxl_fc

....dude, circuit theory, re-read the posts.
i posted that i used the STOCK TII units..
here let me spell it out.
Stock TURBO fuel pump
Stock TURBO injectors.
Stock TURBO ecu
and yes its N/A so how would i be able to run the stock TII intercooler with-out fabricating something?
i suppose i could, but i would even know how or where to stick it since its rather large.
Whats a good size to get as far as the intercooler goes tho?
or else i'm going to fit the widest intercooler that wont be blocked in the space through the front bumper (most effecient cooling is by the widest area being used right?)

(PS: read all previous posts before jumping to conclusions.)

and as i stated before, the temporatures are getting lower, and its an automatic.
which i wont be doing any spirited driving.
i am fully aware of the cooling issue not running the intercooler brings.

Circuit Theory

iTrader: (52)

I read all your posts and I dont think this car is going to run the way you seem to think it will. Aside from that if you need an intercooler i have about 5 Trust intercoolers available however you would need to fabricate piping.
There is a shop in CA called JRX that has a NA engine to turbo conversion upper and lower intake manifold that would make things much easier for you as well as allow you to use a stock FC intercooler. I think that option would be the most cost effective for your plans.
It is hard to not see what I am typing as negative but if we were talking in person you would be able to understand I am just stating what I think and not saying you are an idiot for doing this.
Good luck:thumbsup:

86gxl_fc

dont get me wrong dude, i'm all up for constructive criticism.
but not for flat out insult, with the whole "i'll give it a month".
and the Trust incoolers are hella expensive.. i also live in DALLAS,
so unless JRX had a website i could order from, thats outta reach.
man, i guess there isnt a designated size to use for certain projects.
just what ever works best for your particular set up then..
err, thats what i'm understanding since i havent gotten any straight answer in size.

86gxl_fc

just thought i'd post a pic of my two ladies.
i'm thinking about selling one of my TII hoods. lol

Craiger

iTrader: (1)

He has some good points. I think you should read http://www.aaroncake.net/RX-7/naturbo.htm if you haven't already. you are almost doing exactly what Aaron did so it should be a great help to you.

For intercooler size, for what you are doing you can probably still get away with just about anything. In fact, a cheap ebay one is probably all you really need at this point. I believe Aaron did fab something up with the stock intercooler too if that is an option for you.

Based on what you are doing I would highly recomend running stock boost and no more... untill you upgrade the fuel system. If its not too late I would get a better fuel pump than the stock turbo pump too, or an aftermarket FPR. You are putting a slightly lean fuel system onto a high compression motor. To run safe you are going to need more fuel than a regular TII motor.

Good luck and keep in mind that people here are only trying to help you not blow your motor.

86gxl_fc

so the stock TII fuel pump isnt enough? i'm ONLY going to be running stock on this car.(the burgundy color is automatic)
it'll be my stock daily driver.
i already had most of the stuff for the turbo, i decided to go ahead and do it.
what does an aftermarket FPR actually do?
from my understanding, it limits the flow to a regulated amount...
i thought it worked similar to the manual boost controller.
i've got big plans for the white FC i have tho, its goin to be my track car
i've got a rebuilt street port, i've had lying in my garages since i pulled it out of my old gxl and rebuilt it.

Craiger

iTrader: (1)

The TII fuel pump is a weak point of the TII... it is probably the first thing that should be upgraded when making mod's to the car.

I guess simply put, an FPR and a boost controller do work in the same way in that they restrict a passage, however they preform a very different task and really shouldn't be compared in any way. The stock FPR on the secondary fuel rail is very good in my opinion... except that it is not adjustable. You will be able to set the pressure on an aftermarket unit. Since the injectors are opened and closed by the ECU on a timed base, the easiest way to get more fuel to the engine, without changing the fuel MAP in the ECU, is to increase the fuel pressure. This will cause more fuel to make it through the injector when it gets opened. Warning... DO NOT buy a cheap ebay unit... it is not the right kind. If you do this you will need a riseing rate FPR.

Obviously, electronically increasing the fuel MAP (ie. running a piggyback or standalone) would be the better way to do it, however this can work if done properly and be safe for the engine.

If I were you I would upgrade the pump and then test the car with a wideband to see where it stands.

86gxl_fc

would any other fuel pump cut it?
i remember readin a thread about a crown victoria or interceptor or somethin that used similar injectors, would running a fuel pump from a different car be an option.. (IE 300zx, Supra fuel pump.. etc)?
i'm going to keep the car conservative, as i stated before, i wont be running any boost over stock.
i'm considering using a side-mount sr20 intercooler since its small and wont be sitting in the engine bay.
i wouldnt have it blocking the radiator.

Craiger

iTrader: (1)

You would have to figure out how much they flow. But you can get a Walbro for 100bones so why bother looking for other options? Others you'd have to buy the pump and then do a custom mounting system and so on. Keep it simple and get a good one that fits.

The SR20DET intercooler will probably be fine for what your doing... and much better than nothing at all.

NZConvertible

You don't need a rising-rate FPR. A linear-rate FPR is fine and is what most people use.