Nitrous Oxide Installation | Tuning | Products
Sponsored by:
Sponsored by:

When To Go To Direct Port

Thread Tools
 
Search this Thread
 
Old 07-11-2006, 07:20 PM
  #1  
Formerly 4mulaJoe
Thread Starter
iTrader: (11)
 
LS1x2's Avatar
 
Join Date: Nov 2001
Location: hou
Posts: 2,763
Likes: 0
Received 0 Likes on 0 Posts

Default When To Go To Direct Port

At what horsepower level do you want to go to direct port instead of dual nozzles for example? Anybody have some real experience with problems running larger shots through nozzles? Of course the type of intake and whatnot matters, but I just want to here some feedback about what people have seen.
Old 07-11-2006, 07:33 PM
  #2  
9 Second Club
 
wyndzer's Avatar
 
Join Date: Sep 2005
Location: Wilson, NC
Posts: 151
Likes: 0
Received 0 Likes on 0 Posts
Default

I'd say over 200.
Old 07-11-2006, 07:40 PM
  #3  
TECH Fanatic
iTrader: (12)
 
xaon's Avatar
 
Join Date: Jan 2002
Location: Tomball, TX
Posts: 1,737
Likes: 0
Received 1 Like on 1 Post
Default

Rule of thumb on an LS1/LS6/LSx intake is to go direct port at levels above 250.
Old 07-11-2006, 08:05 PM
  #4  
Formerly 4mulaJoe
Thread Starter
iTrader: (11)
 
LS1x2's Avatar
 
Join Date: Nov 2001
Location: hou
Posts: 2,763
Likes: 0
Received 0 Likes on 0 Posts

Default

You guys have had problems over 200-250?
Old 07-11-2006, 08:46 PM
  #5  
TECH Junkie
iTrader: (9)
 
next's Avatar
 
Join Date: Jun 2003
Location: Winter Garden, Florida
Posts: 3,428
Likes: 0
Received 0 Likes on 0 Posts

Default

There's a few guys around that have run big shots on a single nozzle. With a direct port there's a huge benefit especially with an LSx type intake to be able to tune each cylinder with jet changes. When you read the plugs you can see which cylinder to fatten up by changing the fuel jet.
Old 07-11-2006, 09:12 PM
  #6  
Race your car!
iTrader: (50)
 
JL ws-6's Avatar
 
Join Date: Mar 2004
Posts: 15,420
Likes: 0
Received 18 Likes on 18 Posts

Default

Originally Posted by next
With a direct port there's a huge benefit especially with an LSx type intake to be able to tune each cylinder with jet changes. When you read the plugs you can see which cylinder to fatten up by changing the fuel jet.

That sounds like Ken talking right there....
Old 07-11-2006, 09:26 PM
  #7  
TECH Junkie
iTrader: (10)
 
Loudmouth LS1's Avatar
 
Join Date: Nov 2002
Location: Deerfield Beach, FL
Posts: 3,672
Likes: 0
Received 0 Likes on 0 Posts

Default

Like Eric said, main benefit is being able to tune each cylinder seperately to get them all perfect, with spraying before the intake, you can't control where it gets distributed. I have no idea if it does or does not get evenly distributed going through the intake, so I can't really comment on that. But I have been running a 300 shot dual stage first stage 200 wet, second stage 100 dry with some good results, and know of others that have had some success with similar setups, so I don't know. But i'll probably switch to a direct port whenever I can get the money together for one and a 90/90 setup, just do it all at once.
Old 07-11-2006, 10:18 PM
  #8  
n2o
TECH Enthusiast
iTrader: (1)
 
n2o's Avatar
 
Join Date: Jan 2003
Location: Saban Country
Posts: 702
Likes: 0
Received 0 Likes on 0 Posts

Default

Devon, do you run a straight up nitrous tune? I was wondering because I have a dry and a wet kit and I was gonna run the dry first to pull timing then whack it with the wet kit. That would be so I could run a good motor tune and not have to switch at the track.
Old 07-11-2006, 10:27 PM
  #9  
TECH Junkie
iTrader: (10)
 
Loudmouth LS1's Avatar
 
Join Date: Nov 2002
Location: Deerfield Beach, FL
Posts: 3,672
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by n2o
Devon, do you run a straight up nitrous tune? I was wondering because I have a dry and a wet kit and I was gonna run the dry first to pull timing then whack it with the wet kit. That would be so I could run a good motor tune and not have to switch at the track.
Yes, I have the timing dropped in the tune, I hit it with the wet kit first cuz it hits harder and I wanna get out of the hole, but i'm basically hittin it all at once, the dry comes in only a tenth of a second later, but i'm nervous to hit it all together, don't wanna go on the bumper.
Old 07-12-2006, 08:45 AM
  #10  
Formerly 4mulaJoe
Thread Starter
iTrader: (11)
 
LS1x2's Avatar
 
Join Date: Nov 2001
Location: hou
Posts: 2,763
Likes: 0
Received 0 Likes on 0 Posts

Default

I know some cylinders are going to be richer that others. My thinking was to am for 12.0-12.4:1 or so on the a/f to make sure there is less chance of going lean in a cylinder. It sounds like there are people running some pretty big shots through nozzle systems.
Old 07-12-2006, 08:50 AM
  #11  
Race your car!
iTrader: (50)
 
JL ws-6's Avatar
 
Join Date: Mar 2004
Posts: 15,420
Likes: 0
Received 18 Likes on 18 Posts

Default

I'd be thinking about running more towards 11.5 to 1 if you want to be safe.
Old 07-12-2006, 08:55 AM
  #12  
TECH Junkie
iTrader: (10)
 
Loudmouth LS1's Avatar
 
Join Date: Nov 2002
Location: Deerfield Beach, FL
Posts: 3,672
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by 4mulaJoe
I know some cylinders are going to be richer that others. My thinking was to am for 12.0-12.4:1 or so on the a/f to make sure there is less chance of going lean in a cylinder. It sounds like there are people running some pretty big shots through nozzle systems.
That's actually pretty lean, i've been told to shoot for 11.3 - 11.8

I still haven't been able to get mine to lean out enough, I gotta play with some things, mine's running at like 10.1 I gotta play with the fuel jet and the standalone pressure some more.
Old 07-12-2006, 10:05 AM
  #13  
Formerly 4mulaJoe
Thread Starter
iTrader: (11)
 
LS1x2's Avatar
 
Join Date: Nov 2001
Location: hou
Posts: 2,763
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Loudmouth LS1
That's actually pretty lean, i've been told to shoot for 11.3 - 11.8

I still haven't been able to get mine to lean out enough, I gotta play with some things, mine's running at like 10.1 I gotta play with the fuel jet and the standalone pressure some more.
Are you getting these numbers on the track/street or on a dyno? I wouldn't be surprised to see 12.3:1 on the street turn to 11.8:1 on the dyno. Just curious.
Old 07-12-2006, 10:07 AM
  #14  
TECH Junkie
iTrader: (10)
 
Loudmouth LS1's Avatar
 
Join Date: Nov 2002
Location: Deerfield Beach, FL
Posts: 3,672
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by 4mulaJoe
Are you getting these numbers on the track/street or on a dyno? I wouldn't be surprised to see 12.3:1 on the street turn to 11.8:1 on the dyno. Just curious.
That was on a dyno and the o2's were over 1000 on both sides. I haven't gotten my own wideband yet, so i've been going off the o2's and the lowest i've been able to get 'em is like 980's, i'm gonna keep playin with it and try and get them down to 960's, that should put me in the mid 11's range on a wideband, and then when I get my wideband i'll double check everything.
Old 07-12-2006, 10:25 AM
  #15  
8 second mod
iTrader: (37)
 
Noyzee's Avatar
 
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by JL ws-6
That sounds like Ken talking right there....
sounds like a Nitrous guy to me
Old 07-12-2006, 06:26 PM
  #16  
TECH Resident
iTrader: (23)
 
slowredz's Avatar
 
Join Date: Aug 2005
Location: DFW, Texas
Posts: 750
Likes: 0
Received 0 Likes on 0 Posts

Default

I am on a 200 with a TNT F2 dual nozzle kit. probably fixing to try 250 but I am getting mixed reviews on that idea. with the stand alone we are having a hard time getting it lean enough. I have 200 nitrous pills and 150 fuel pills just to get it on the chart on the dyno
Old 07-12-2006, 06:31 PM
  #17  
TECH Junkie
iTrader: (10)
 
Loudmouth LS1's Avatar
 
Join Date: Nov 2002
Location: Deerfield Beach, FL
Posts: 3,672
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by slowredz
I am on a 200 with a TNT F2 dual nozzle kit. probably fixing to try 250 but I am getting mixed reviews on that idea. with the stand alone we are having a hard time getting it lean enough. I have 200 nitrous pills and 150 fuel pills just to get it on the chart on the dyno
Dude, same thing here, 200 tnt F2 dual nozzle jetted at 200 with a standalone, put the 200 n20 jets and 150 nitrous jets, that barely leaned it out, then dropped the pressure in the standalone and that dropped it a little, but it's still running pretty rich.
Old 07-12-2006, 08:11 PM
  #18  
TECH Junkie
iTrader: (9)
 
next's Avatar
 
Join Date: Jun 2003
Location: Winter Garden, Florida
Posts: 3,428
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Noyzee
sounds like a Nitrous guy to me
Yup. Definitely a compliment, but I'm guessing he don't know how grey I am. Or is that seasoned?
Old 07-12-2006, 08:11 PM
  #19  
Formerly 4mulaJoe
Thread Starter
iTrader: (11)
 
LS1x2's Avatar
 
Join Date: Nov 2001
Location: hou
Posts: 2,763
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Loudmouth LS1
Dude, same thing here, 200 tnt F2 dual nozzle jetted at 200 with a standalone, put the 200 n20 jets and 150 nitrous jets, that barely leaned it out, then dropped the pressure in the standalone and that dropped it a little, but it's still running pretty rich.
Mine is the opposite. Running a dual nozzle NX kit. I've got got .035 jets in instead of .024 for a 150 shot to hit 12.5:1. This car runs fairly lean on motor though. About 13.3:1.
Old 07-13-2006, 09:53 AM
  #20  
8 second mod
iTrader: (37)
 
Noyzee's Avatar
 
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by next
Yup. Definitely a compliment, but I'm guessing he don't know how grey I am. Or is that seasoned?
i love reading plugs, they have such good stories!
NEXT, i cant wait to see what your car does!!!!!!!!!!!!!!!!!!!!!!!
if you want tho, when ken is done, have him send it to me, or i will go pick it up, and please let me clean that dirty thing!!!!



All times are GMT -5. The time now is 07:46 AM.