Jump to content



Photo
- - - - -

Nitrous kit on an 8.1...Anyone do it?


  • Please log in to reply
11 replies to this topic

#1 Sierra35008.1

Sierra35008.1

    GM Til the end "

  • Moderator
  • 2,474 posts
  • Name:Ron Kirkham
  • Location:PA...poconos
  • Gender:Male
  • Drives:05 sierra 3500 8.1 - 04 silverado 2500hd 8.1

Posted 06 April 2012 - 05:18 PM

Im debating on a little kit for the pickup..I wouldnt use it all the time, just palyin around here and there.
Just curious if someone has done it. As solid as the 8.1 is i figured a 75-100 shot wouldnt hurt it but be enough to feel it.
Also would i have to do anything with timing and/or ignition?
Posted Image
http://s1340.beta.photobucket.com/user/rhughes7824/media/Ron%20stuff/2012-12-03145410.jpg.html?sort=3&o=0
2005 gmc sierra 3500 ext cab long box 8.1,allison,11.5 ring gear, 4x4, 4:10,s, S&B intake,BlackBear Tune, Raylar Cam,
Stainless works long tubes on there way,.. blocks in rear, new keys up front, mickey thompson classic II,s, 305-70-16 firece attitude M/T
Rancho shocks, No Cats, stainless X-pipe,maganflow 3" straight thru mufflers, Back rack,
" Still under construction"

#2 Silverado4x4

Silverado4x4

    Senior Enthusiast

  • Member
  • 2,281 posts
  • Location:Maryland
  • Gender:Male

Posted 06 April 2012 - 10:24 PM

Stock sprayed motors live a very short life. With the weight of the Suburban and a 75-100 shot your tranny and rear will hate you. If you have alot of miles on that motor you will be asking for trouble. Now if you build a motor to use spray thats a little bit of a differant story but they dont last that long eather but will last longer then a stock sprayed motor.

2015 White Double Cab Chevrolet Silverado Longbed 2500HD 4x4, 4:10 Gears, 6 Speed, 6.0 L
2011 Dark Blue Chevrolet Traverse LS AWD


#3 Sierra35008.1

Sierra35008.1

    GM Til the end "

  • Moderator
  • 2,474 posts
  • Name:Ron Kirkham
  • Location:PA...poconos
  • Gender:Male
  • Drives:05 sierra 3500 8.1 - 04 silverado 2500hd 8.1

Posted 08 April 2012 - 04:00 PM

Whats it going to hurt or affect first?
Posted Image
http://s1340.beta.photobucket.com/user/rhughes7824/media/Ron%20stuff/2012-12-03145410.jpg.html?sort=3&o=0
2005 gmc sierra 3500 ext cab long box 8.1,allison,11.5 ring gear, 4x4, 4:10,s, S&B intake,BlackBear Tune, Raylar Cam,
Stainless works long tubes on there way,.. blocks in rear, new keys up front, mickey thompson classic II,s, 305-70-16 firece attitude M/T
Rancho shocks, No Cats, stainless X-pipe,maganflow 3" straight thru mufflers, Back rack,
" Still under construction"

#4 scooby5121

scooby5121

    Enthusiast

  • Member
  • 426 posts
  • Name:Eric
  • Location:Ontario
  • Gender:Male
  • Drives:08 GM 6L CrewCab Dually 4by4

Posted 08 April 2012 - 07:31 PM

To much heat , should have mercury filled valves to anticipate the heat so they do not weld up.
Let me see after a few times I guess you should buy a boat because you will have a nice boat anchor.
Seriously talking if you want to do some tweaking I would not suggest nos.

scooby

#5 Sierra35008.1

Sierra35008.1

    GM Til the end "

  • Moderator
  • 2,474 posts
  • Name:Ron Kirkham
  • Location:PA...poconos
  • Gender:Male
  • Drives:05 sierra 3500 8.1 - 04 silverado 2500hd 8.1

Posted 09 April 2012 - 06:25 AM

Thanks
Posted Image
http://s1340.beta.photobucket.com/user/rhughes7824/media/Ron%20stuff/2012-12-03145410.jpg.html?sort=3&o=0
2005 gmc sierra 3500 ext cab long box 8.1,allison,11.5 ring gear, 4x4, 4:10,s, S&B intake,BlackBear Tune, Raylar Cam,
Stainless works long tubes on there way,.. blocks in rear, new keys up front, mickey thompson classic II,s, 305-70-16 firece attitude M/T
Rancho shocks, No Cats, stainless X-pipe,maganflow 3" straight thru mufflers, Back rack,
" Still under construction"

#6 doug_scott

doug_scott

    Senior Enthusiast

  • Member
  • 2,179 posts
  • Location:Ajax, ON
  • Gender:Male
  • Drives:2010 GMC SL

Posted 09 April 2012 - 11:57 AM

To much heat , should have mercury filled valves to anticipate the heat so they do not weld up.
Let me see after a few times I guess you should buy a boat because you will have a nice boat anchor.
Seriously talking if you want to do some tweaking I would not suggest nos.

scooby


I think you mean sodium filled valves, and even then, only the exhaust valves get it. Mercury filled was not something that ever hit commercial use.

#7 NitroCherokee

NitroCherokee

    Enthusiast

  • Member
  • 606 posts
  • Location:Flushing Michigan
  • Gender:Male
  • Drives:08 F250 Super Crew 4x4 Powerstroke & 06 GMC Yukon XL 4x4

Posted 09 April 2012 - 12:35 PM

Have never done it on an 8.1L but have sprayed a couple stock LS1 5.7's and 1 stock 5.3L with no problems.

The LS1's I have done were both 125 h.p. shots and the 5.3 was a 100 h.p. shot.

As long as you are not spraying it to death and hitting the rev limiter while still spraying you are safe

Now go to a tune where it is running on the lean side to begin with then spray the shit out of it and yes heat will be an issue
Drive Fast, Take Chances, Swerve Alot

#8 ChevyTech77

ChevyTech77

    GM Master Certified Technician

  • Member
  • 2,697 posts
  • Location:Michigan
  • Gender:Male
  • Drives:'11 Silverado ECSB L9H Z71

Posted 09 April 2012 - 12:46 PM

I have set up numerous 75-100 hp kits on stock engines with 0 issues. If used sensibly, as NC described, all will be fine. A purpose built nitrous engine has no use with less than 300-500 hp of spray being used religously, imo.
Chevy tough.
Anytime baby!

Every screw up is an opportunity not to make another one.

#9 Sierra35008.1

Sierra35008.1

    GM Til the end "

  • Moderator
  • 2,474 posts
  • Name:Ron Kirkham
  • Location:PA...poconos
  • Gender:Male
  • Drives:05 sierra 3500 8.1 - 04 silverado 2500hd 8.1

Posted 09 April 2012 - 04:37 PM

thanks guys... I wouldnt go more than 125 anyway.
next question...wet kit or dry kit??
my guy can tap and thread my intake ports, vs just spraying in the trottle body,
Posted Image
http://s1340.beta.photobucket.com/user/rhughes7824/media/Ron%20stuff/2012-12-03145410.jpg.html?sort=3&o=0
2005 gmc sierra 3500 ext cab long box 8.1,allison,11.5 ring gear, 4x4, 4:10,s, S&B intake,BlackBear Tune, Raylar Cam,
Stainless works long tubes on there way,.. blocks in rear, new keys up front, mickey thompson classic II,s, 305-70-16 firece attitude M/T
Rancho shocks, No Cats, stainless X-pipe,maganflow 3" straight thru mufflers, Back rack,
" Still under construction"

#10 NitroCherokee

NitroCherokee

    Enthusiast

  • Member
  • 606 posts
  • Location:Flushing Michigan
  • Gender:Male
  • Drives:08 F250 Super Crew 4x4 Powerstroke & 06 GMC Yukon XL 4x4

Posted 10 April 2012 - 07:01 AM

Wet is my preferance. I would also recommend just spraying it in the throttle body, the direct injection in my expierience is for higher horsepower and requires finer tuning
Drive Fast, Take Chances, Swerve Alot

#11 ChevyTech77

ChevyTech77

    GM Master Certified Technician

  • Member
  • 2,697 posts
  • Location:Michigan
  • Gender:Male
  • Drives:'11 Silverado ECSB L9H Z71

Posted 10 April 2012 - 08:37 AM

Wet at the throttle body X2, for this application.
Chevy tough.
Anytime baby!

Every screw up is an opportunity not to make another one.

#12 Nitro375

Nitro375

    Enthusiast

  • Member
  • 195 posts
  • Location:Washington State
  • Gender:Male

Posted 25 May 2012 - 05:59 PM

Why? It's a truck, built to haul and tow.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users