Blow Off Valve required?

[SupaStealth TT]

This may seam like a easy question, but, I recently purchased a TD04 Turbo from a 2003 WRX for a custom app. and i was wondering, do you NEED a BOV?

I planned to purchase one later, but if i need one to get this runnin' then i guess i'll have to. also, where in the plumbing does it go? lol, i bet you're glad i'm not putin the turbo on your car

Thanx much

[Porsche]

Don't for one second take my word as a mechanic's... but, BOV as far as I know are needed when boost pressure runs too high at certain rpm, and BOVs keep the boost manageable, thus allowing thr turbos to run more often without the driver having to let off the gas in fear of blowing the manifold.

I'd say go for since they aren't too expensive and they sound cool, with a twin turbo setup, one is proably nessecary anyways.

[ales]

Porsche, you're mixing up BOV and a wastegate. The wastegate is the one that keeps the boost "manageable", while the BOV releases the pressure from the intake before the manifold when the throttle is shut to prevent the air going backwards into the compressor.

SupaStealth TT, it all depends on the kinds of boost levels you'll be running. Can't hurt, though, I suggest, though, not venting into the atmosphere but recirculating the air due to possible driveability issues. Having said that, are you sure you are able to install that turbocharger on your own?

[SupaStealth TT]

Hehe, thanks ales, i'm probably not goina be runnin that high of boost, i'm sure not above 10psi until i think i have it tuned right, lol, i'm about 80 percent sure of myself that i can do it.

oh, yeah, my second question was overlooked, where does it go in the plumbing, the logical place to me would seem it would go before the turbo letting the gas go before it builds up too much pressure, but thats just my brain thinkin', lol. a diagram (advanced preferably, with vacuum lines 'n stuff) would be very appreciated of all this.

The tough part for me is goina be routing the exhaust, i'm sure i'll have to make a flange to the turbo and the exiting gasses could be a problem too, there isn't too much space with all the electricals by the throttle body (and throttle cables).

thanx much

[jeffescortlx]

Originally posted by SupaStealth TT
Hehe, thanks ales, i'm probably not goina be runnin that high of boost, i'm sure not above 10psi until i think i have it tuned right, lol, i'm about 80 percent sure of myself that i can do it.

oh, yeah, my second question was overlooked, where does it go in the plumbing, the logical place to me would seem it would go before the turbo letting the gas go before it builds up too much pressure, but thats just my brain thinkin', lol. a diagram (advanced preferably, with vacuum lines 'n stuff) would be very appreciated of all this.

The tough part for me is goina be routing the exhaust, i'm sure i'll have to make a flange to the turbo and the exiting gasses could be a problem too, there isn't too much space with all the electricals by the throttle body (and throttle cables).

thanx much

10 psi is a nuff to blow up most N/A cars. you better start with 5.
Do you know how to modify the waste gate to run lower boost? if not you should look into it.
The BOV need to go inbetween the turbo and throttle body, than recurculate back into the turbo to not confuse the air flow sensor and PCM. The vacume line goes after the throttle body (intake manifold)vac line.
Fuel managment is the most important step, what are you gonna do about that?
Any boost about 5 to a N/A car will need the ignition retarted to prevent deto, and high octane gas, and colder spark plugs.
What car do you plan on doing this to?
I think you need to do some more reading before you turbo any thing

[SupaStealth TT]

Do you know a website on how to make the wastegate adjustable? i've heard a little about it, but not much.

I'm planning on puttin' this turbo on a 1999 Ford Taurus with the craptastic 3.0 Vulcan engine. I'm planning on getting a fuel pump off of a V-8 mustang (i still have to check with compatibility) and probably injectors from a stang too. I have Bosch Platinum Spark plugs. No ignition yet, i'm not sure what i should go with, i'm sure MSD. and I plan on getting a superchips chip for it.

Will the Airflow sensor work with a turbo, or would i have to get one from a diff engine?

What do i use to retard the engine?

[jeffescortlx]

Originally posted by SupaStealth TT
Do you know a website on how to make the wastegate adjustable? i've heard a little about it, but not much.

I'm planning on puttin' this turbo on a 1999 Ford Taurus with the craptastic 3.0 Vulcan engine. I'm planning on getting a fuel pump off of a V-8 mustang (i still have to check with compatibility) and probably injectors from a stang too. I have Bosch Platinum Spark plugs. No ignition yet, i'm not sure what i should go with, i'm sure MSD. and I plan on getting a superchips chip for it.

Will the Airflow sensor work with a turbo, or would i have to get one from a diff engine?

What do i use to retard the engine?

Most Ford's share the same fuel pump, you will find the same pump on a 88 hp Escort than you will on a 200hp ford V8.
The normal operating fuel pressure is 32-40 psi, ( the pumps can push 80 psi) and 90% of fords use 19# injectors, again from a Escort down to a Mustang V8, the only time you'll see any thing larger is in a Factory Forced inducion or high out put motor, like a SVO, Cobra, 2.3 Turbo Coupe, supercharged T bird..ect.
But dont just think you can pop any injector in and it gonna work, you have to also match the impedance.
Yes the air flow sensor will work with boost, but you'll still need some kind of fuel managment.
If you have a return line fuel system you can use a FMU, but sine 98 ford like to go with non-return line systems, that get's spendy and coplex to make work, read up at focaljet.com and other shared vehical systems like that.
You wondering how can the same sized injector and fuel pump work in a car that makes twice the power, Escort vs. Mustang? The mustang has twice the cylenders and injectors there for twice the power out put.
You can either retard timing with a MSD DIS-4 or a custom programmed chip.
Keep on reading and researching.

[SupaStealth TT]

well, i understand how the injectors could make more power with a V-8 compaired to an I-4, but the same fuel pump? anyways.. i just heard some people sayin' that the mustang injectors were bigger, thats where i got that. otherwise i was thinkin' of Supercoupe injectors either that or the 2.3 turbo injectors. Are you sayin' that I wouldn't need a fuel pump, to me that would seam to put a lot of strain on the stock one. I also heard that the FFV (flex fuel Vulcan) Engine has stock 24# injectors to support E-85 (ethonol 85%) fuel, but i imagine i wouldn't find that at any junkyard, lol, and would pay a hella lots at a dealer.

I suppose it would cost quite a bit for me to have a custom chip programmed, but i'll have to look into that, i pretty much have to get a chip and ignition, so i'll have to see. Is it really worth the money to get bigger wires, right now i have 8.0mm wires...

So, another question which is goina make ya think i'm a total idiot... the oil lines, i suppose there are no existing oil lines i can use huh?

Oh, and just one more, lol, you can rotate the housings on turbos correct?, i know on garrett's you can (at least on the t-3's that i've seen).

well, thats all for now.

[jeffescortlx]

Originally posted by SupaStealth TT
well, i understand how the injectors could make more power with a V-8 compaired to an I-4, but the same fuel pump? anyways.. i just heard some people sayin' that the mustang injectors were bigger, thats where i got that. otherwise i was thinkin' of Supercoupe injectors either that or the 2.3 turbo injectors. Are you sayin' that I wouldn't need a fuel pump, to me that would seam to put a lot of strain on the stock one. I also heard that the FFV (flex fuel Vulcan) Engine has stock 24# injectors to support E-85 (ethonol 85%) fuel, but i imagine i wouldn't find that at any junkyard, lol, and would pay a hella lots at a dealer.

I suppose it would cost quite a bit for me to have a custom chip programmed, but i'll have to look into that, i pretty much have to get a chip and ignition, so i'll have to see. Is it really worth the money to get bigger wires, right now i have 8.0mm wires...

So, another question which is goina make ya think i'm a total idiot... the
oil lines, i suppose there are no existing oil lines i can use huh?

Oh, and just one more, lol, you can rotate the housings on turbos correct?, i know on garrett's you can (at least on the t-3's that i've seen).

well, thats all for now.

The larger the injectors the easyer it is on the fuel pump, thay have a larger opening so its easyer to push the fuel though. Most of Fords I4, V6 and V8 share a lot of fuel components, look at my Turbo Escort for exsample: The stock fuel pump is the same part # as one for a normal V8, same with the fuel pressure regulator, I'm using a Accel adjustable one for a 86-93 Mustang. (stock fuel pressure is 30-42 on 95% of fords).
My stock injecors are 19#, but I'm using 24# blue tops from a Cobra.
I'm also using a Carteh Adjuatable Fuel managment unit (FMU) to bring the fuel pressure up with boost. So it starts at 40 psi just before boost and ends at about 60psi of fuel pressure while at 6 psi of boost.
As long as you use the correct size injectors you dont need a stronger fuel pump UNLESS you stay with stock injectors and totaly relay on high fuel pressre to supply your fuel requirements.
Custom chips are about $200-300, you shouldnt need a MSD system if you get a custom chip that knows your boosting.
Your last worry should be plug wires.
Caution using 2.3 turbo injectors, there 3 ohm, if your PCM (stock injectors) are ment for high impedance 16 ohm injectors, you'll fry your PCM (computer).
Oil lines are just brake lines, just buy pre made stright brake lines with 1/4 ends on it and bend them how ever you need them.
you'll need a 2.3 TC oil line block distibitor to tap in to the oil sending unit pressure.
Yes you can rotate the compressor housing on most turbos, I did on mine.

[SupaStealth TT]

Wow, this is probably the most i've ever gotten out of a thread at AF. Umm, where did you get your Cobra injectors, just outa curiosity? I think the regular chip from superchips for my car is like $265, did you go through the superchips people and get your's custom programed?

also where would be the best place to find the 2.3 TC oil line block distibitor, most of the junk yards in my area won't let me buy anything off of an engine without havin' to buy the whole thing.

thanx

[jeffescortlx]

Originally posted by SupaStealth TT
Wow, this is probably the most i've ever gotten out of a thread at AF. Umm, where did you get your Cobra injectors, just outa curiosity? I think the regular chip from superchips for my car is like $265, did you go through the superchips people and get your's custom programed?

also where would be the best place to find the 2.3 TC oil line block distibitor, most of the junk yards in my area won't let me buy anything off of an engine without havin' to buy the whole thing.

thanx

Cobra injectors: split a set of 8 with another turbo escort friend from ebay, 8 was $150.
I'm not using a chip of any kind, computer is all stock. I'm keeping the boost low enuff and the gas octane high nuff to not need ignition retard.

Oil block: http://ubb.turboford.org/cgi-bin/ultimatebb.cgi
Go to the classified section and post. I got mine for $10.
(make sure your motor uses a standerd ford oil pressue sensor).

Before you go any further, find out if you have a return line fuel system or a non-return line fuel system.
follow the fuel lines to the fuel rail and see if there is a second line on the other end going back to the fuel tank.
You must find out what and how to take care of fuel managment.

[SupaStealth TT]

ok, another question, Do you know if the TD04 Turbo off of the Suburu WRX would be the same TD04 as the ones off, say, a Mitsubishi 3000gt, or something in that line? Because the turbo I bought doesn't have the exhaust diverter that goes to the down pipe. Unless there is somewhere i could buy one that would be better than the cast one that comes stock.

[jeffescortlx]

I dont know??
But did you find out what kind of fuel system you have?

[454Casull]

It doesn't matter what your boost pressure is, you should have a blow-off valve installed.

And 10psi isn't enough to make most engines "blow up".

[SupaStealth TT]

nah, i didn't, i don't think this whole turbo thing is goina happen, i just got screwed by the guy i bought the turbo from on ebay, it says his email address doesn't exhist anymore, and i allready payed the bastard for it, so... Now i have to go through either paypal or ebay and figure out how to get my 245 bux back. Although i still want to do this turbo, i don't think that even if i did buy a different turbo, i wouldn't have enough time to install it and fabricate all this other stuff. Grrr