Obviously a smaller pipe will increase air velocity and responce, but at some point there will be diminshing returns.It will choke at the top end. So since you are so worried aboput response are you going to use a straw for your piping . You can pick up flex straws at McDonalds for your bends, also definately scrap the intercooler because of all the air space that needs to be pressurized hurting your response.

One engineer could also argue that larger piping on the outlet side is beneficial because it allows the slowing down of air through the intercooler core allowing more time for the intake charge to cool.

It is all a compromise. You want maximum response well that is going to hurt your top end, you want top end well response is going to suffer.

Since we are on the topic of response; why did you choose the GTX compressor wheel, it is less efficent at lower pressure ratios which will hurt your response. Also, you stated that you do not want to run more than about 20PSI and that is the point where the billet wheel starts to be more efficient than the cast wheel. Just curious.


Right now I am using the stock lines under the car. When I go E85 I will worry about the stock lines then. Are you talking braded lines?

I will be bending up stainless for that purpose.

 

His Vmount pipeing is very short so it's alot faster to fill than front mount, I don't think his 3" IC pipes will make much of a difference when it come to spool. I actualy spoke to him a while about about pipe size and he already had it all figured out

 

hmmm well obviously you didn't see the guy's question asking you about why you chose the pipe diameter you did. I was simply offering my opinion on the diameter.. not critisizing your build.
Also... using larger piping on the outlet side of an IC core to cool the charge by allowing the air to slow down? come on.. that sounds like horrible compensation for poor I/C core size choice.
I chose the GTX3582r because it's 10-13% more efficient than the previous GT series turbo's. It's an all around better turbo. I would like to get used to lower power on the track before I turn up the boost. Why GTX? room to grow! I'm also trying to make as much power at as low PSI as possible. The billet wheel will aid that

 

Still on track for dyno tuning? Good luck!

 

^ Yea, I have the car running and have been driving it. I am just waiting for the tuner to be free so it can get done. Most likely will be Monday.

Thanks Elliott



John

 

I am not mad. Sorry I came off a bit harsh. I asked a few people to read my reply and they said that it was a bit harsh. I did not mean for it to come off that way. I should have picked better wording. Most of what I typed was meant to be a joke.

The reason for the larger piping is not to make up for poor intercooler size selection, it allows me to run a smaller cooler so I have room for the CAI and for the battery in the front. I am going to make some ducting so the turbo is fed fresh air. It is my opinion that people who run a large intercooler and then feed their turbo hot air from the intercooler are doing it wrong. IMHO you are much better off having a smaller intercooler and having a CAI.

The problem with the GT35r turbos and the GTX35R turbo is thae restrictive exhaust turbine. Also, the problem that there is no true t4 housing available for either turbo. Inorder for you to take full advantage of the GTX wheel you need to run higher pressure ratios and increase flow out of the turbine side. You cant just look at the compressor side of the turbo, you also need to consider how well the exhaust flows through the turbo. So IMHO you will not make much more power using the GTX turbo because you still have the restrictive exhaust turbine. And when you turn up the power the engine will choke because you will be unable to get the exhaust gasses through the turbo efficently.




On a side note, I have an appointment for Tuesday to get the car tuned.

 

John I made you a painting this weekend to celebrate our friendship....

 

That's glorious Rich. You've got some real talent there.

 

So what are the numbers dude.

 

its getting tuned tomorrow he said...

 

I'm not really sure how did you figured this out

For example regular GT3582R at 2.0 PR and 60 lbs/min airflow is 60% efficient, GTX version is about 70% efficient. Basically any flow point at any pressure ratio is more efficient with largest gains being on the right side of the map, only thing which suffers slightly is that surge line is shifted slightly to the right.

Peak efficiency is pretty much the same. Difference is in the peak flow and efficiency at these higher flow rates.

While this is true and ultimately limits power capability of this very high flow compressor, higher efficiency of compressor itself allows for lower backpressure at same flow and pressure ratio.

In the end, turbo itself is only one part of the system, "things" after turbo have huge impact on turbine inlet pressure

 

Rich get your own bitch- this one is already spoken for

 

Great build, where did you get the tubing?

 

Update:

Car made the 1800 mile round trip to deals gap with the only issue being a stuck open secondary Injector on the jersey turnpike, thanks to Brian and lance for helping to quickly diagnose the problem.

Btw, the car made approxmately 395 whp at 15 psi on my original 65k mile engine.



John

 

Good numbers! I am still hoping for 500hp on my car! 3 more weeks!

 

Did you get the Racepak installed? Curious to see pics of the installation of your IQ3.

 

You're still around? haha I don't think I've seen you post in forever!

 

Yea, I got a build of my own going on and am also going with the IQ3. I bought a couple extra gauge face panels to see how I want to go about installing it flush into the stock face panel with some fiberglass work. Also, going to be molding in the start button, keeping the headlight pop up switch, but rigging it to be my light switch for my sleek mounts, and then trying to add an aftermarket fuel gauge into the stock fuel gauge pod....but who knows, maybe someone did something better or something else that I need to think about doing before I start spending money making the mounts and stuff.

I just got back into an FD a few months back....trying to get my groove back after leaving the community for a few years. This build and others definitely gave me the itch to start another FD project.

 

Yeah man there are definitely some incredible builds going on right now. It's nice to see people putting so much detail into their builds....Especially this guy John lol, he's very particular.

 

It is nothing fancy. I just bought this mount http://949racing.com/racepak-iq3-mount.aspx and used screws to mount it to the steering column cover. It is temporary until this winter when I hope to make some type of fiberglass panel to replace the stock gauges.


Dan: Thanks for the backwards compliment.

 

Word on the street is that John is selling is FD to get a twin turbo vette cuz mazdas are slow .. Thats what I heard!!!!

 

^ Have you been drinking again? Cuz that is the only way you could believe some stupid **** like that.

 

Got any pics? How close to the steering wheel does it sit?

 

I will try to get some up today or tomorrow

 

There is no try

Only Do