How much loss in Psi...Boost and/or Hp when extending piping

R

raymond

Member
Location
Netherlands
Car
FX35 RWD
With the Turbonetics Turbo kit i have planned on mounting to my FX coming out of a 350Z the intercooler and air intake piping need to be extended.
The air intake when wanting to get as much cool air into the system as possible, as turbonetics has done on the 350Z kit as well, needs especially to be extended.

What would this influance the Hp and the boost/psi within the system...??

Do i need to higher the turbo psi to compensate this "Lose" due to a longer circuit...??
 
raymond said:
With the Turbonetics Turbo kit i have planned on mounting to my FX coming out of a 350Z the intercooler and air intake piping need to be extended.
The air intake when wanting to get as much cool air into the system as possible, as turbonetics has done on the 350Z kit as well, needs especially to be extended.

What would this influance the Hp and the boost/psi within the system...??

Do i need to higher the turbo psi to compensate this "Lose" due to a longer circuit...??
Click to expand...

Extending the intercooler piping should not influence the psi of your setup. It may however change the RPM in which max psi is achieved. This will probably only be a slight change. Like a couple hundred RPM. What size is the turbo? Trim? A/R? What size is the IC piping?
 
Auburn_Fan said:
Extending the intercooler piping should not influence the psi of your setup. It may however change the RPM in which max psi is achieved. This will probably only be a slight change. Like a couple hundred RPM. What size is the turbo? Trim? A/R? What size is the IC piping?
Click to expand...

The turbo will be the 60-1 turbo wich coms within the turbonetics kit or a Garret GT35R. Have both as an option.
The diameter of the piping i honestly do not know yet. Will look into this. What is the idea behind this...?? Better to go bigger or smaller when extending the system...??

What do you mean with Trim and A/R...??
 
It will be negligible. A few years back, I had a custom turbo on my Maxima. Due to the way the engine bay was set up, I had pretty long IC piping and turbo feed piping. I still hit full boost ~4,000 on a 60-1 (and this was on a VQ30). A friend of mine bought the car and redid much of the piping. He probably took a foot off of the IC piping and another foot off of the feed piping by rerouting it. He hits full boost now at...3900 rpm or so.

You do not have to increase boost to compensate, there's not really enough loss to compensate for. The extra piping just causes more drag (think of air as a fluid) and it's not significant in any way. As for piping size, just run whatever size the turbonetics piping already is. You have to keep the diameter relatively the same. Increasing the size of the piping won't do anything unless you're making ridiculous power. Keep in mind that if you increase the size of the piping, you will have trouble getting it all to fit. Bigger pipes have bigger radius bends. We tried to run 3" IC piping on my Maxima but couldn't get it to fit, so we stuck with 2.5".

Your turbo specs will have a much greater effect on boost response. I'd go with the GT35R if possible. I had a standard Garrett T04S (which was the 60-1) and was about to switch to the GT35R for better boost response, but then sold the car. A ball bearing turbo (GT35R) will have much more effect on boost response than a little bit of extra piping.

raymond said:
With the Turbonetics Turbo kit i have planned on mounting to my FX coming out of a 350Z the intercooler and air intake piping need to be extended.
The air intake when wanting to get as much cool air into the system as possible, as turbonetics has done on the 350Z kit as well, needs especially to be extended.

What would this influance the Hp and the boost/psi within the system...??

Do i need to higher the turbo psi to compensate this "Lose" due to a longer circuit...??
Click to expand...
 
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