nitrous oxide question

Have a question related to Turbos, Nitrous, Supercharging, ect... ask it here.
Post Reply
hondakiller
1GN Registrant
Posts: 167
Joined: Wed Mar 14, 2007 1:39 pm
Location: baltimore,md DUNDALK

nitrous oxide question

Post by hondakiller » Tue Jun 17, 2008 6:50 pm

I want to spray my car but unsure how it will hold up need some feed back from people car has 12.5:1 compression 2.0 built head crane 26 my question is what shot can i go wit before destroying my engine
1974 dodge dart sport 72 demon clone
1994 ford explorer
no neon

User avatar
DOHCRT
1GN Registrant
Posts: 1225
Joined: Sat Mar 03, 2007 12:34 pm
Location: Columbus, OH

Post by DOHCRT » Tue Jun 17, 2008 8:53 pm

There's not too many people who have ventured into nitrous with a similar setup to yours, so good answers are going to be hard to come by. You need to be very careful with nitrous and high compression, especially if you're using a PCM with advanced timing. If you have crane 26's, you really need a stand-alone anyway.

Those cams are not exactly optimal for nitrous. Lots of overlap isn't the key to nitrous performance. You can minimize the overlap with adjustable cam gears, but this will hurt performance when off the bottle.

Keep it safe and run it with race fuel and retard ignition timing. Good luck.
"Losers always whine about their 'best'. Winners go home and fuck the prom queen"

Project Log

hondakiller
1GN Registrant
Posts: 167
Joined: Wed Mar 14, 2007 1:39 pm
Location: baltimore,md DUNDALK

Post by hondakiller » Tue Jun 17, 2008 8:55 pm

thank you
1974 dodge dart sport 72 demon clone
1994 ford explorer
no neon

User avatar
1fast2liter
1GN Registrant
Posts: 1231
Joined: Thu Mar 01, 2007 3:30 am
Location: Beaver dam, WI

Post by 1fast2liter » Tue Jun 17, 2008 11:26 pm

did you do forged internals? that will limit what you do to. a stock neon can handel 50 continuesly with a travel in to 75 or a hundred every now and then.... forged internals and a good tune you could do 100 or better. but like the post said maybe ms and race fuel is in your future...
Image

96 blue coupe sold
96 white 4 door sold
95 blue sport parted out
97 straberrie red coupe sold
95 black base parted out

current drivers
97 dodge ram 1500 5.9 ext cab sport fire engine red. tinted windows cat back exhaust suer chips tune, 1 mephis audio sub

90 audi 80. 400 miles to the tank
2002 custom sportster 90 whp and quick too

hondakiller
1GN Registrant
Posts: 167
Joined: Wed Mar 14, 2007 1:39 pm
Location: baltimore,md DUNDALK

Post by hondakiller » Tue Jun 17, 2008 11:29 pm

thats fun to you know ... i was thinking about going msd but maybe ms where i got to go
1974 dodge dart sport 72 demon clone
1994 ford explorer
no neon

User avatar
DOHCRT
1GN Registrant
Posts: 1225
Joined: Sat Mar 03, 2007 12:34 pm
Location: Columbus, OH

Post by DOHCRT » Wed Jun 18, 2008 12:36 am

When you get into big ass cams like 26's, MS is almost required to even run it. Have you started this engine yet?
"Losers always whine about their 'best'. Winners go home and fuck the prom queen"

Project Log

hondakiller
1GN Registrant
Posts: 167
Joined: Wed Mar 14, 2007 1:39 pm
Location: baltimore,md DUNDALK

Post by hondakiller » Wed Jun 18, 2008 6:12 am

nope still in the build, think i can get by on a pigie back system like msd ?
1974 dodge dart sport 72 demon clone
1994 ford explorer
no neon

User avatar
DOHCRT
1GN Registrant
Posts: 1225
Joined: Sat Mar 03, 2007 12:34 pm
Location: Columbus, OH

Post by DOHCRT » Wed Jun 18, 2008 7:07 pm

Timing isn't the problem, its fuel that is difficult to control. You will need to try an SAFC at the minimum. If that doesn't work, you will need to use a stand-alone like MS.

With big cams, you wont have much vacuum at idle. The PCM sees this as a high load, and dumps a bunch of fuel to compensate. This is why mass-airflow systems usually work better than speed-density with big cams.

With an SAFC, you can effectively "clamp" the MAP voltage at idle so the PCM does not read a high pressure signal from the sensor.
"Losers always whine about their 'best'. Winners go home and fuck the prom queen"

Project Log

hondakiller
1GN Registrant
Posts: 167
Joined: Wed Mar 14, 2007 1:39 pm
Location: baltimore,md DUNDALK

Post by hondakiller » Wed Jun 18, 2008 8:02 pm

thats a good point think il look in to that
1974 dodge dart sport 72 demon clone
1994 ford explorer
no neon

neonjeffie
1GN n00b
Posts: 7
Joined: Sat Oct 18, 2008 11:00 pm
Location: ohio

Post by neonjeffie » Tue Oct 21, 2008 6:47 pm

last year i ran a 75 wet shot all year long and ran 12.70's with a single cam automatic with 12.5 je pistons. kinda scared to go any higher... stock engine will take a dry 100 shot.... but not very many times. it will melt the rings to the pistons not that i would know from experience..... haha
96 2dr neon turbo intercooled nitrous injected mtx= broken parts

lilred95
1GN Registrant
Posts: 17
Joined: Fri Sep 14, 2007 7:22 pm
Location: Belvidere, IL
Contact:

Post by lilred95 » Mon Oct 27, 2008 11:22 pm

Plus with those 26s in a 2.0 and a stock computer youre going to find that rev limiter REAL quick. Your powerband is going to be way higher than what any regular computer will let you do. Youre going to have to get MS regardless, its a hell of a lot easier to get it tuned with that than with an ECU and a piggyback. Might even end up saving a tiny bit of money.

As for how much nitrous... I think with the 12.5:1 youre not going to have as big of a tuning window as you would with a 10.5 motor. Id say start with a 75 and work up from there, keep on eye on your wideband with every change you do. And as said earlier, race gas (hope you dont have a cat), and retard the timing, which MS can do also. But I think your ceiling with the nitrous is going to be about 150-175hp with that kind of compression. Any higher and youre going to be pulling way too much timing and start losing some of that power that youre trying to gain.
DOHC > SOHC
99 Sport Sedan - stockish
95 Highline Sedan - stock ... bottom end. yeah, thats it.

2003silverneonsxt
1GN Registrant
Posts: 47
Joined: Thu Oct 16, 2008 12:22 am
Location: Lebanon, PA

Post by 2003silverneonsxt » Tue Oct 28, 2008 12:46 am

2.0 SOHC
MP Computer
Powder coated valve cover
Chikara racing header
direct port nitrous system
UR adjustable cam gear
UR under drive pulley
Nology plugs plug wires and coil amps
JE pistons 20 over 10 ½ : 1 compression
Eagle rods
Ferrea Valves
Ported and polished head

Transmission:
Auto 5 speed swap
Center force clutch
Trans mount insert
Short throw arms on Trans with hard bushings
Short throw shifter with hard bushings



this is my mods,, what could i run on my setup,,

i have everything for the nitrous done but drilling the intake and finishing running the lines,,,, let me know what else i need or w/e
Image

1996 base model SHOW CAR

Post Reply