Notices
Forced Induction Turbochargers and Superchargers..Got Boost?

Pre-turbo water injection: has anyone done it?

Old Sep 21, 2010 | 09:24 AM
  #41  
streetzlegend's Avatar
streetzlegend
New Member
iTrader: (2)
 
Joined: Feb 2009
Posts: 586
Likes: 1
From: Miami FL
Default

Originally Posted by str8dum1
most turbos have 1/8 NPT ports on them for wastegate reference on the compressor housing.. just put the nozzle there. no need to tap anything
Yes but that is after the air has already been compressed(which is near the outlet), I am refering to spraying inside the actual snail.
Reply
Old Sep 21, 2010 | 09:51 AM
  #42  
Resmarted's Avatar
Resmarted
Registered User
iTrader: (2)
 
Joined: Jul 2009
Posts: 3,493
Likes: 64
From: ur face
Default

Originally Posted by rcdash
Bottom line: to increase compressor efficiency.

Just to take a quick example (all formulas for calculations at this link, with the following assumptions: 3.54L engine, 15.3 psi running at 7000 rpms, VE is 90%):

If the temperature after the turbo is 200 F, calculated theoretical horsepower is 440.

If the temp drops to 140 F, horsepower climbs to 483.

If the temp drops to 100 F, horsepower climbs to 518.

Significant gains are to be had by increasing turbo efficiency. It's why we have intercoolers, but unlike intercoolers the efficiency gained is not associated with a pressure loss (which counteracts the gain as the turbo has to pump more air).
I'd imagine if the water is fully atomized then you wouldn't see damage. Because if you think about it, our air has very well atomized h2o in it and we never 'see' the damages. I'd also imagine that drop for drop, the post turbo water system would be more effective, although that's just what I lean towards, I don't have any real reason to believe this.
Reply
Old Mar 4, 2011 | 02:21 PM
  #43  
rcdash's Avatar
rcdash
Thread Starter
New Member
iTrader: (18)
 
Joined: Jul 2005
Posts: 6,474
Likes: 65
From: Chapel Hill, NC
Default

Well I think I can conclusively say this doesn't work. Sharif proved it on the dyno today. Data to follow but reported immediate 20 whp power loss with preturbo spray on (dual aquamist .3 mm nozzles) vs just pre-TB spray. Might wait till ZdayZ before disclosing new #s from pre-TB W/M injection. Anyway, I'm ripping out my preturbo tubing next chance I get.

Last edited by rcdash; Mar 4, 2011 at 03:33 PM.
Reply
Old Mar 4, 2011 | 03:00 PM
  #44  
GreenGoblin's Avatar
GreenGoblin
Registered User
iTrader: (6)
 
Joined: Feb 2007
Posts: 1,732
Likes: 1
From: South Flordia
Default

^ Sorry to hear that, but also glad that you gave it a shot.
Reply
Old Mar 4, 2011 | 04:41 PM
  #45  
Sylvan Lake V35's Avatar
Sylvan Lake V35
Registered User
iTrader: (23)
 
Joined: Jan 2007
Posts: 2,108
Likes: 1
From: Alberta Canada
Default

Glad you tried it, it was something I had considered as well.
Reply
Old Mar 4, 2011 | 05:03 PM
  #46  
k6750gsxr's Avatar
k6750gsxr
New Member
iTrader: (17)
 
Joined: Feb 2007
Posts: 1,115
Likes: 1
From: Tampa,Fl
Default

thanks for the update.

I am good friends with a guy with g35 down in palm beach fl who has a greddy kit fitted with gt30r's ... his turbos were running out of breath due to the small piping on the greddy kit. Not sure if g35 kit differs from the 350z kit.

Long story short he ran pre turbo meth only. His goal was to condense the air to allow better flow through the pipes ? Not sure the final outcome of his project, but he claimed no increase in power as well.

this was the car.... and it was done at Billet Design Motorsports .... you can call them to see if they ever got positive results from it...

Reply
Old Mar 4, 2011 | 05:13 PM
  #47  
GreenGoblin's Avatar
GreenGoblin
Registered User
iTrader: (6)
 
Joined: Feb 2007
Posts: 1,732
Likes: 1
From: South Flordia
Default

Thats John's car.
Reply
Old Mar 11, 2011 | 06:08 PM
  #48  
rcdash's Avatar
rcdash
Thread Starter
New Member
iTrader: (18)
 
Joined: Jul 2005
Posts: 6,474
Likes: 65
From: Chapel Hill, NC
Default

That's a nice looking intake manifold but I wonder if the volume may be tapering top end power rather than pipe size. The Greddy kits in standard form have made great power. I don't think GT30s are going to be limited by Greddy pipe size, which I think are at least 2 inch going to 3 inch after the IC. Now the JWT kit has a 2.5" section that receives air from both turbos - that does need addressing.

Last edited by rcdash; Mar 11, 2011 at 06:11 PM.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
etkms
Engine & Drivetrain
29
Jun 19, 2022 06:30 PM
350z82
Exterior & Interior
19
Oct 1, 2015 06:25 PM
roadmax
Exterior & Interior
3
Sep 12, 2015 05:55 PM
PureR3d
Maintenance & Repair
2
Sep 10, 2015 06:23 PM


Thread Tools
Search this Thread

All times are GMT -8. The time now is 01:30 AM.