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

Why not direct port?

Thread Tools
 
Search this Thread
 
Old Sep 11, 2005 | 09:04 AM
  #1  
RealLiveMD's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
iTrader: (1)
 
Joined: Mar 2005
Posts: 552
Likes: 0
Default Why not direct port?

From what I've read both wet and dry kits can malfunction leading to total engine loss. However, Direct port kits for only $600-700 more will be much safer on a stock car. If this is true, then I'm thinking $1200 for the kit, $600 for accessories, $400 install and I have a relatively safe daily street driver with an extra 125 shot. Shoot holes in this theory if I'm wrong.
Reply
Old Sep 11, 2005 | 09:11 AM
  #2  
Turo's Avatar
TECH Junkie
iTrader: (23)
 
Joined: Aug 2003
Posts: 3,465
Likes: 0
From: Tallahassee, FL
Default

Well, the nice thing about them is that they get a beter mixture to the cylinders. They tend to be used for bigger shots though, most DP kits will tell you the smallest recommended shot is a 150 or so, so it depends on how much you are going to spray.

BTW, you may want to have a mod move this to the nitrous section, may get more opinions over there.
Reply
Old Sep 11, 2005 | 04:15 PM
  #3  
RealLiveMD's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
iTrader: (1)
 
Joined: Mar 2005
Posts: 552
Likes: 0
Default

From what I've read, a few people get by on a 150 shot, but the 125 seems to be the safest for the stock bottom.
Reply
Old Sep 11, 2005 | 04:27 PM
  #4  
Matt@HSW's Avatar
FormerVendor
iTrader: (14)
 
Joined: Jun 2005
Posts: 2,056
Likes: 0
From: Glenolden, PA
Default

If done correctly a 150 shot is perfectly safe on a stock bottom end LS1. There are people doing 250+ shots successfully on stock bottom end cars.

Matt
Reply
Old Sep 11, 2005 | 04:46 PM
  #5  
badass 2002 z28's Avatar
9 Second Club
iTrader: (5)
 
Joined: Nov 2001
Posts: 1,300
Likes: 0
From: St. Louis, MO
Default

A direct port isn't worth it unless u plan on spraying more than 150..bigger shots are where DP's really shine
Reply
Old Sep 11, 2005 | 05:56 PM
  #6  
ls1408cp's Avatar
10 Second Club
iTrader: (37)
 
Joined: Aug 2005
Posts: 1,778
Likes: 0
Default

if you just buy the good kit now you dont have to buy it in the future and it is better on the motor every cylinder sees the same amount of fuel and nitrous
Reply
Old Sep 11, 2005 | 06:08 PM
  #7  
Airwolf's Avatar
TECH Apprentice
iTrader: (2)
 
Joined: Jun 2005
Posts: 376
Likes: 0
From: Florida's East Coast
Default

I am doing a 175 now. I really wanted the "look" of the Direct Port.
I had a single nozzle that worked great but looked like every other nitrous setup. The only real advantage of DP is the WOW factor for anything 200 or less; at those levels a single/dual nozzle will do. My friends who are not car guys even freaked when they saw the DP system, but hardly noticed my single nozzle system.
To use a DP on small shots (200 or less) you will probably have to go with a fuel regulator or stand alone fuel system that regulates to 10 PSI. Staying a high PSI with a small shot can (and has) caused problems from the jets being so small. At 60 PSI, for a 150 shot, the jets are .012 (super small) but a 10 PSI, the jets are .020, almost the same size as the nitrous jets at .024 . So be prepared for that added expense and fun of the install. Also be prepared for 1 hour to change jets! Luckily I am at the level I want now.
Good luck.
Reply
Old Sep 12, 2005 | 10:42 AM
  #8  
Nitro Dave's Nitrous Outlet's Avatar
FormerVendor
iTrader: (25)
 
Joined: Jun 2002
Posts: 12,283
Likes: 4
From: Waco, TX
Default

A directport is a nice way to go.I do not suggest a direct port for anything over a 250 hp shot normally.The directport obviously cost more money but also requires more time and tunning.I would suggest a top quality system like a NX single nozle or maff system.With all the accessories you will have fuun time and time again just as safe.
Dave
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-1

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-2

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-3

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-4

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-5

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-6

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-7

10 Camaros You Should Never Buy

 
story-8

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
story-9

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

 Brett Foote
Old Sep 12, 2005 | 04:20 PM
  #9  
chpmnsws6's Avatar
TECH Addict
iTrader: (70)
 
Joined: Sep 2003
Posts: 2,525
Likes: 2
From: Springfield IL
Default

Originally Posted by Nitro Dave's Nitrous Outlet
A directport is a nice way to go.I do not suggest a direct port for anything over a 250 hp shot normally.The directport obviously cost more money but also requires more time and tunning.I would suggest a top quality system like a NX single nozle or maff system.With all the accessories you will have fuun time and time again just as safe.
Dave

you don't like direct port systems if your shooting over a 250 shot?
Reply
Old Sep 12, 2005 | 04:34 PM
  #10  
Turo's Avatar
TECH Junkie
iTrader: (23)
 
Joined: Aug 2003
Posts: 3,465
Likes: 0
From: Tallahassee, FL
Default

Originally Posted by ramairstyle00
you don't like direct port systems if your shooting over a 250 shot?
I think he meant that he recommends direct ports for 250+ shots.
Reply
Old Sep 12, 2005 | 04:37 PM
  #11  
Matt@HSW's Avatar
FormerVendor
iTrader: (14)
 
Joined: Jun 2005
Posts: 2,056
Likes: 0
From: Glenolden, PA
Default

Agreed I'm just as confused as you, but I'm pretty sure it's a typo.

Matt

Originally Posted by ramairstyle00
you don't like direct port systems if your shooting over a 250 shot?
Reply
Old Sep 12, 2005 | 04:46 PM
  #12  
Nitro Dave's Nitrous Outlet's Avatar
FormerVendor
iTrader: (25)
 
Joined: Jun 2002
Posts: 12,283
Likes: 4
From: Waco, TX
Default

correct,
Sorry its a typo.I normally suggest Directports for 250 or above.There is nothing wrong with running it on smaller shots.Its just not as critical.
Dave
Reply
Old Sep 13, 2005 | 03:09 PM
  #13  
chpmnsws6's Avatar
TECH Addict
iTrader: (70)
 
Joined: Sep 2003
Posts: 2,525
Likes: 2
From: Springfield IL
Default

okay, just making sure
Reply
Old Sep 13, 2005 | 04:32 PM
  #14  
Nitro Dave's Nitrous Outlet's Avatar
FormerVendor
iTrader: (25)
 
Joined: Jun 2002
Posts: 12,283
Likes: 4
From: Waco, TX
Default

Originally Posted by ramairstyle00
okay, just making sure
Thanks
Reply
Old Sep 13, 2005 | 08:20 PM
  #15  
RealLiveMD's Avatar
Thread Starter
TECH Enthusiast
20 Year Member
iTrader: (1)
 
Joined: Mar 2005
Posts: 552
Likes: 0
Default

The problem was i read one of the FAQ's which gave a lot of real world drawbacks for the other kits, plus rumors about bad spark plugs, etc. Being a newbie, it seemed simple, pay the extra g, and spray 125-150 shot without worries.
Reply
Old Sep 13, 2005 | 08:44 PM
  #16  
Speed Density's Avatar
hashtagBMW
iTrader: (38)
 
Joined: Jul 2005
Posts: 6,572
Likes: 2
From: Boise, Idaho
Default

DAVE, what do you recomend on a 383 storker? I plan on getting a rebuild and i want to spray it, looking for low 12's high 11's but very very streetable!
Reply
Old Sep 13, 2005 | 10:03 PM
  #17  
11SECDWS6's Avatar
Banned
iTrader: (3)
 
Joined: May 2005
Posts: 427
Likes: 0
From: HTown
Default

This may sound like a silly question but do you need an O2 sensor for each cylinder if your running direct port?
Reply
Old Sep 14, 2005 | 12:15 PM
  #18  
chpmnsws6's Avatar
TECH Addict
iTrader: (70)
 
Joined: Sep 2003
Posts: 2,525
Likes: 2
From: Springfield IL
Default

no, they all spray equaly among the rail
Reply
Old Sep 14, 2005 | 12:27 PM
  #19  
FastBlackTA's Avatar
8 Second Club
20 Year Member
iTrader: (7)
 
Joined: Dec 2002
Posts: 1,086
Likes: 0
From: Maryland
Default

A DP system might be overkill on a stock bottom end depending on how much you want to hit it with. Check my sig for DP pics if you're looking into how they can be done.
Reply
Old Sep 14, 2005 | 12:32 PM
  #20  
chpmnsws6's Avatar
TECH Addict
iTrader: (70)
 
Joined: Sep 2003
Posts: 2,525
Likes: 2
From: Springfield IL
Default

Originally Posted by FastBlackTA
A DP system might be overkill on a stock bottom end depending on how much you want to hit it with. Check my sig for DP pics if you're looking into how they can be done.

i originally bought it to equalize the flow to all the cylinders, trying to help the bottom end last alil bit longer
Reply




All times are GMT -5. The time now is 06:19 PM.

story-0
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-1
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-2
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-3
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-4
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-5
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-6
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-7
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-8
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-9
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE