Nissan 370Z Forum  

Successfull Tracking with Forced Induction??

The boost pressure is also a big deal. Tracking while boosting +5-7 psi is different from +16 psi. And superchargers seem to add less heat than a turbo or TT

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Forced Induction


Reply
 
LinkBack Thread Tools Display Modes
Old 12-21-2011, 07:54 PM   #1 (permalink)
Base Member
 
Join Date: May 2011
Location: USA
Posts: 140
Drives: 370Z
Rep Power: 16
_ace_ is on a distinguished road
Default

The boost pressure is also a big deal. Tracking while boosting +5-7 psi is different from +16 psi. And superchargers seem to add less heat than a turbo or TT system at the same peak boost/hp level.

One way to make this work is to just get two tunes on a TT system: a very low boost tune (like 3-5psi, almost off) for extended track use and a higher boost tune for street/drag/auto-x/a single fast lap where heat buildup isn't as much of an issue.
_ace_ is offline   Reply With Quote
Old 12-21-2011, 08:09 PM   #2 (permalink)
Enthusiast Member
 
Join Date: Mar 2009
Location: NY
Posts: 345
Drives: G37
Rep Power: 18
modme will become famous soon enoughmodme will become famous soon enough
Default

Quote:
Originally Posted by _ace_ View Post
The boost pressure is also a big deal. Tracking while boosting +5-7 psi is different from +16 psi. And superchargers seem to add less heat than a turbo or TT system at the same peak boost/hp level.

One way to make this work is to just get two tunes on a TT system: a very low boost tune (like 3-5psi, almost off) for extended track use and a higher boost tune for street/drag/auto-x/a single fast lap where heat buildup isn't as much of an issue.
Gonna correct you on a couple of things. No one is tracking at 16psi. In fact, no one has reached 16 psi on a stock motor. For turbos, you can turn down your boost controller, but you can never go below the wastegate spring pressure, which is 5-6 psi.

For superchargers, you're stuck. Whatever pulley you have in there will determine the boost pressure. You cannot change boost levels easily.

And I'm pretty sure given the same horsepower and boost level, a supercharged car will generate more heat. In a supercharged car, a significant portion of horsepower (and hence heat) is wasted on spinning the supercharger. Whereas a turbo uses mostly exhaust waste to spin. This is the same reason the superchargers use a 650cc injector to make similar or less horsepower than a turboed car, which is using a 600cc injector.
__________________
GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1
modme is offline   Reply With Quote
Old 12-21-2011, 08:28 PM   #3 (permalink)
A True Z Fanatic
 
Nixlimited's Avatar
 
Join Date: Aug 2009
Location: San Diego
Posts: 1,235
Drives: 15 GT-R / 11 Prius
Rep Power: 27
Nixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond reputeNixlimited has a reputation beyond repute
Default

Quote:
Originally Posted by modme View Post
Gonna correct you on a couple of things. ...
And I'm pretty sure given the same horsepower and boost level, a supercharged car will generate more heat.
It's not really that simple. The thing to remember is that a TT car may make full boost at 3500 RPM, while a SC car won't make it until redline. Accordingly, the TT car is making much more power over the rev band--even if they ultimately have the same peak HP--which is clear when you look at a dyno plot of the tq of a TT car. All of this extra power will likely produce more heat than spinning the SC.
__________________
Car Sold! Pleasure being a part of the Z community.
New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)
Nixlimited is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
forced induction in australia andylena Australia/New Zealand 23 09-15-2016 12:52 PM
Forced Induction Reliability spearfish25 Forced Induction 58 09-08-2013 12:14 PM
Forced Induction for Noobs... Slidefox Forced Induction 48 06-15-2013 12:32 AM
Forced Induction oil temperatures xbigb4ller69z Forced Induction 46 08-18-2010 08:45 PM
Forced induction Seth G Forced Induction 13 04-09-2010 12:36 AM


All times are GMT -5. The time now is 03:46 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2