Turbo choices

[faq]

Originally Posted by cleanspeed1

If you go to Garrett Turbo's website, they have all the formulas to make a proper sizing choice. Click on the Diesel button and go to town.

I agree with what cleanspeed, Garrett will be a good place to look.

[cleanspeed1]

Originally Posted by Christ

That's precisely what I want, actually. I plan on pulling trailers with this car once it's sorted, and I do like to have done fun occasionally, as well. It already drops power like a brick at 4k rpm, and I'm ok with it. A little more pickup couldn't hurt, and better efficiency isn't a bad thing, either.

Ok, that's good. Next question; are you going to mount the turbo next to the engine using the factory Ecodiesel manifold, fabbed header, modded NA manifold or do you want to remote mount it?

I got bored and went and calculated the airflow and boost requirement to take the hp level to 95 hp.

The airflow needed is 13.23 pounds per minute.

The boost requirement 14.29 psi

Your pressure ratio is 2.26

These figure came from using the formulas on the Turbo by Garrett site, assuming .38 BSFC, 3600 rpms, 130 degree F intake temp, 2 psi boost loss in the intake system, 1 psi loss due to inlet restriction.

Considering you want to tow, I would want to increase off boost torque by doing a cam swap, as long as it clears the pistons.

Only other thing would be either a water/meth injector or a MSD / Superchips propane injection system set for max economy ( not for power ); it'll really boost the economy.

The rotary style pumps fuel hard down low, and if you got with a good pump shop to adjust the fueling and timing curves so that it has a fast power rise and gets you into the fat part of the boost in the 1500-2500 rpm range, you should be happy with it.

[Christ]

I just found t that thing you were talking about this morning... I was obsessing over the not-compatible-with-android-app they have for awhile.

I could send one of my pumps to giles to get a super pump built, but last I checked, that was like $750... Not wanting to spend that kind of coin yet with so much left to fix. Although his pumps are proven positive.

I'm going to be using the stock N/A manifold, most likely, and mounting the turbo on the side of the engine, above and ahead of the transmission. I'll have an adapter pipe made and a sooty brace that bolts to the bell housing.

That, of course, is if I don't find a good deal on a turbo/manifold that bolts on and fits the criteria.

[jtbo]

How much of work and money you are willing to invest?

What you describe from powerband would be easy to obtain with VNT turbo, but many of those require some kind of control, which again requires some electronic work. I guess there was some fully mechanical ones too, but it is bit gray area for me.

One problem with traditional turbo is that if you use small enough to get good boost at low rpm, you will loose top end and easily EGT goes trough the roof at higher rpm, but only way I know how to get boost from idle would be with very small turbo that is too small when going to higher rpm.

Boost build up can be helped with limit pressure valve (google translated term), that does keep wastegate closed until set pressure is reached.

KKK K16 turbo was used small Fiats, it would boost from idle in 1.6l diesel, but it would not be possible to get very good top end, I doubt that it would even work at 4000rpm without causing too high EGT, it is too narrow/tiny but that would do great at lower rpm.

With VNT you would get several size turbos in one, boost would come a lot lower rpm while still being enough big for high rpm.

That is at least how I understand this.

[cleanspeed1]

An application like this would not need a VNT style turbo, it would be overkill. The flow requirements are too small and he's not going for the big top end. A fixed geometry turbo with a properly tuned pump will get the job done.

If anything, a little Roots blower would be even better, since boost response is instantaneous; but he didn't ask for that.

[jtbo]

Originally Posted by cleanspeed1

An application like this would not need a VNT style turbo, it would be overkill. The flow requirements are too small and he's not going for the big top end. A fixed geometry turbo with a properly tuned pump will get the job done.

If anything, a little Roots blower would be even better, since boost response is instantaneous; but he didn't ask for that.

You don't need to seek big top end with VNT, you can get smaller one that would give that boost from idle, many small diesels around here have such small VNT turbo that boosts from very low rpm and there is not big power at top, torque is flat from 1000rpm to almost 4000rpm.

Regular turbo is really difficult to make work how Christ described, imo. Usually there is not much of boost under 1500rpm in such small motor, unless you put undersize turbo which is then really a problem at higher rpm, in my understanding such setup is very prone to failure, or then turbo exhaust side must be so large that there is no real boost from idle.

[bestclimb]

Originally Posted by Christ

From speaking with tuners who specialize in Dubs, the only difference in the block is the presence of piston oil squirters, and the injection pump had a boost enrichmernt feature. I'd be happy to review any documentation that points to the contrary, though.

Those were the modifications I was referring to.

[Tygen1]

Gt-15 vnt

[cleanspeed1]

Originally Posted by Tygen1

Gt-15 vnt

US spec TDI 1.9, right?

[Creeper]

SRT4 or PTGT Turbos should make it easy enough for your application the SRT4 and PTGT use the same turbo's and can handle up too 20psi