Who has installed a nitrous oxide or evaporative charge air cooling system?
03-29-2012, 05:45 PM
#16
CF Veteran
Join Date: Mar 2010
Location: Jacksonville, FL
Posts: 6,685
Likes: 0
Received 5 Likes
on
5 Posts
Year: 92
Model: Cherokee
Engine: 4.0
Originally Posted by highvoltagefeathers
I am thinking about installing a 75 wet shot in my 97 4.0, and just thought I wouldn't be the only one who would like a thread full of pictures of these systems!
PLEASE NOTE:
People tend to be very closed minded on this forum, and if you think nitrous oxide is a stupid idea for a jeep, please keep your opinion to yourself. You don't HAVE to read further if you don't want to.
Nitrous oxide CAN be a fun, effective performance booster when applied correctly and safely, and IT IS A GIVEN that ANY type of cooling/supplementary oxygen/boost will increase chamber pressure and lead to higher stresses within the engine and drivetrain. THIS IS NOT NEWS.
That said,
Constructive criticism only please.
So. Any juiced builds?
PLEASE NOTE:
People tend to be very closed minded on this forum, and if you think nitrous oxide is a stupid idea for a jeep, please keep your opinion to yourself. You don't HAVE to read further if you don't want to.
Nitrous oxide CAN be a fun, effective performance booster when applied correctly and safely, and IT IS A GIVEN that ANY type of cooling/supplementary oxygen/boost will increase chamber pressure and lead to higher stresses within the engine and drivetrain. THIS IS NOT NEWS.
That said,
Constructive criticism only please.
So. Any juiced builds?
Imo, run a wet fogger system, run a seperate fuel system for the nitrous. Don't go over 50 -75 jets. Install a real wideband. And run a window switch.
03-29-2012, 08:32 PM
#17
Newbie
Join Date: Jan 2012
Location: Oklahoma
Posts: 531
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0
Ive had a couple sprayed xj's over the years. One with a 75 jet and a 2wd one with 120 jets. Along with about 15 other personal vehicles I've had on the bottle.
Imo, run a wet fogger system, run a seperate fuel system for the nitrous. Don't go over 50 -75 jets. Install a real wideband. And run a window switch.
Imo, run a wet fogger system, run a seperate fuel system for the nitrous. Don't go over 50 -75 jets. Install a real wideband. And run a window switch.
03-29-2012, 08:34 PM
#18
CF Veteran
Join Date: Mar 2010
Location: Jacksonville, FL
Posts: 6,685
Likes: 0
Received 5 Likes
on
5 Posts
Year: 92
Model: Cherokee
Engine: 4.0
Originally Posted by XJdryva
Yeah I'll go with too damn fast. I never woulda found out except for one time this speed demon with a duramax truck went flying by me and I decided to speed up and use him as radar bait. I had it floored a good 10 seconds or so when I realized I was catching up to him then actually ended up flying by him. 100 is about 4 o'clock on the speedo and it's sitting at straight up 6 so probably around 120 lol
03-29-2012, 08:57 PM
#19
Newbie
Join Date: Jan 2012
Location: Oklahoma
Posts: 531
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: 4.0
03-29-2012, 09:01 PM
#20
Senior Member
Join Date: Jun 2009
Location: Central Pennsylvania
Posts: 670
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee (XJ)
Engine: 4.7 H.O.
X2 on the wet shot. A dry shot will be too lean and cause detonation thus destroying the engine. I've dynosim spec'ed one to see what would happen with a 100 shot. It calculated an AF ratio of 22.7:1 on a dry kit (catastrophic failure) and 15.2:1 with a wet kit. Playing with the fuel pressure in wet kit lines could easily fix it. Since you've done your homework, I'm sure you know a wide band 02 sensor is really necessary and its smarter to start rich and work towards leaning. From my personal experience, my bored and stroked motor (no NOS or boost) stops making power when the AF ratio drops below 11.45:1 (dyno tested with 5 runs) and seems to do best at around 12.5:1 so I would say start at 12:1 or so and see how it does. I assume your gonna run a stand alone tuner with the NOS?
I think I would also, in your shoes and wishing to run NOS, port and polish the head, upgrade my injectors to the 703's and run a 99+ manifold for better flow. I have heard of people using windshield washer fluid injected into the intake manifold to keep cylinder temps down, but I have no personal experience with it.
I think I would also, in your shoes and wishing to run NOS, port and polish the head, upgrade my injectors to the 703's and run a 99+ manifold for better flow. I have heard of people using windshield washer fluid injected into the intake manifold to keep cylinder temps down, but I have no personal experience with it.
03-29-2012, 09:11 PM
#21
CF Veteran
Join Date: Mar 2010
Location: Jacksonville, FL
Posts: 6,685
Likes: 0
Received 5 Likes
on
5 Posts
Year: 92
Model: Cherokee
Engine: 4.0
Originally Posted by sv41878
X2 on the wet shot. A dry shot will be too lean and cause detonation thus destroying the engine. I've dynosim spec'ed one to see what would happen with a 100 shot. It calculated an AF ratio of 22.7:1 on a dry kit (catastrophic failure) and 15.2:1 with a wet kit. Playing with the fuel pressure in wet kit lines could easily fix it. Since you've done your homework, I'm sure you know a wide band 02 sensor is really necessary and its smarter to start rich and work towards leaning. From my personal experience, my bored and stroked motor (no NOS or boost) stops making power when the AF ratio drops below 11.45:1 (dyno tested with 5 runs) and seems to do best at around 12.5:1 so I would say start at 12:1 or so and see how it does. I assume your gonna run a stand alone tuner with the NOS?
I think I would also, in your shoes and wishing to run NOS, port and polish the head, upgrade my injectors to the 703's and run a 99+ manifold for better flow. I have heard of people using windshield washer fluid injected into the intake manifold to keep cylinder temps down, but I have no personal experience with it.
I think I would also, in your shoes and wishing to run NOS, port and polish the head, upgrade my injectors to the 703's and run a 99+ manifold for better flow. I have heard of people using windshield washer fluid injected into the intake manifold to keep cylinder temps down, but I have no personal experience with it.
Thread
Thread Starter
Forum
Replies
Last Post
Blackcherokee290
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
27
07-26-2022 07:52 PM
Aryl
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
04-10-2019 09:07 AM
95cherokee89
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
59
10-16-2015 03:17 AM
Tompop
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
16
08-25-2015 03:35 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)