Sol Kid

Hey everyone, I'm a newbie in the area of turbos so I have a few questions. I have a '95 del Sol with a d15b7 and I'd like to turbo it. How much psi could the stock internals handle? I was planning on running around 5 psi to begin with anyway. Also, is there any turbo you would specifically recommend for running low psi like I plan? Lastly, is there any FAQ or general turbo information around? I need to learn more of the basics before I start buying parts.
Thanks! Jesse

HMT-Admin

https://www.homemadeturbo.com/faq.htm

that is my old faq, it needs to be revised a bit.

You can turbo your stock motor, 5psi is a peice of cake. I would go with a smaller t3 turbo, like off a saab or 300zx. they have wastegates that are set to 5.5psi. Its tough to find wastegates that are set low.

Jeff

Robo_Wop

How's the spool up on those turbos?

mike 94sc2

I just put a t3 from a 300zx in my saturn. Not sure what year it came off of but it has a .63 A/R on the exhaust side, spools up by around 3500 rpm. One thing to note on the nissan turbos, most of them(not sure what years) have a non-standard bolt pattern for the turbine to O2 housing, so you can't stick the wastegate/O2 housing from another garrett t3 on without changing the whole turbine housing.

mike

HMT-Admin

Very true about the Nissan turbo, you would have to use the stock O2 housing.. Its not the common 5 bolt flange.

For a D-series I would go with something a bit smaller than "94sc2" you may want to go with a .48/.42 setup.

Btw, how does that saturn do with boost? got any pics?

JEff

mike 94sc2

It goes pretty good, have to tweak a few things(aka-gut cat). I plan on getting a different turbo though, probably a t3/t4 hybrid with a .48 A/R on the exhaust. If you like ghetto setups you will love how mine is right now. Since I couldnt get a new O2 housing I cut mine flush then welded my piping to it, the piping bends are also ghetto. I will get pics up as soon as I get new batteries for my digital cam.

Mike

Sol Kid

Thanks for all the info!
A few more questions:
Can you explain what A/R means?
Would I need an intercooler or fuel management system to run 5 psi on my stock d15?
Lastly, will I lose my AC even with a small turbo? Living in Arizona, I'm not losing it.
Thanks again.

mike 94sc2

Well basically A/R describes how the exhaust gasses will push on the blades of the turbine(basically speaking, I am not going to look it up in the book right now). The higher the A/R the less restrictive it is to the exhaust gasses, but it takes more flow to spin the turbo hence you have more lag. A lower A/R like .48 is more restrictive to the exhaust gasses but it will make the turbo spool up quicker.

Maximum Boost is a good book to read for info on turbo systems. Goes over many details on choosing and setting up a turbocharger.

From what I have read in books and on the internet, an intercooler is not necissary at low boost levels. As I do not know much about imports I have no clue on the fuel management, but is safe to say you will need at least a FMU.

As far as the A/C, my particular log manifold wont let me fit my A/C compressor back in(need to make a new bracket first). Depending on the manifold you use you may or may not lose yours. Once again I don't know much about imports so I don't know the location of your A/C compressor, but from what I have read the common method involves an adaptor plate on a stock manifold. As long as your A/C compressor is not mounted low on your engine and you use the adaptor plate method I am guessing you will be fine.

Mike

Turbodelsolman

To answer your question, I have a 1993 Del sol d16z6. As you do, I also live in Arizona, and yes.. ac is a must! Since u live in az.. i would definetly get fmic.. and an fmu/fpr/fuel pump would all be good to have even with stock internals.. then u will have no problem running about 6-8 psi.. just dont boost much in the summer... Not a good daily driver for summer in az.... trust me... i know first hand.. but yes u can easily leave the ac.

VeilSide

how hot does it get in arizona.i mean the daily temperature.........i thought for stock internals...........just need FMU/FMIC/better fuel pump will work for 7 psi........correct me if i am wrong..why does it need FPR?