Nitrous - What can a mainly stock 4.6 handle?

throwedoff · May 26th, 2008, 12:52 AM

Just bought a 300C a few days ago to use as my daily driver and I'm wanting to dump a little more money into the Mustang and use it as a weekend car. However, I don't want to have to do anything that requires rebuilding my engine yet, because I just got a new engine installed a few months ago, and due to financial limitations at the time, went with a used engine instead of rebuilding the blown one.

I've got a 99 GT with a motor with about 50k miles and the only mods I have are P&P Plenum and TB, Exhaust (midpipe, mufflers), SCT Xcal2 tune, and CAI. My question is what kind of nitrous jetting could I safely go with on this engine? I'm assuming I'd need to upgrade my fuel pump, aren't factory pumps only good up to 350 or so horsepower? What else would I need to upgrade? Would I also need to go with colder plugs?

I was always anti nitrous, seemed like cheating to me, but I'm starting to cave in to the idea due to the prices, $500-750 for that much horsepower can't be beat. I'd also be going with 3.73s (I hear 3.73s are better than 4.10s for an automatic if you go with nitrous or a supercharger, is that right?).

Any input?
I'd likely be going with a Zex kit, due to hearing a good bit of things about them.

Drgnracin72 · May 26th, 2008, 01:16 AM

some have run 150 but your tune and octane better be spot on. to stay safe leave it at 100

throwedoff · May 26th, 2008, 01:18 AM

So 100 shouldn't cause any problem? Also, the fuel pump will need to be upgraded, rigth? Should I go with colder plugs?

NXstang · May 26th, 2008, 01:20 AM

Nitrous Express wet kit....100 shot. You'll be happy with that. The 150 shot doesnt give that much of a gain over a 150 shot to warrant the risk of the extra fuel in an intake that like to puddle fuel.

throwedoff · May 26th, 2008, 01:46 AM

NXStang, would you recommend 4.10s or 3.73s? I see you have 4.10s, which is why I ask.

Safi · May 26th, 2008, 01:50 AM

most people go with 3.73's if its manual and 4.10 for auto

Drgnracin72 · May 26th, 2008, 02:54 AM

when i rebuild my rearend this weekend, i am going to put in a set of 4.10 gears and its a manuel.

oh and i picked up 7 mph in the 1/4 mile going from a 100 to a 150 shot, but the key to the puddling problem is to not spray to early. mine doesnt spray till 4000 rpms and shuts off at 6500 rpm

SWEET2KSTANG · May 27th, 2008, 01:42 AM

i am spraying 125 right now, mine is set to hit at 3200 and shut off at 6k. i will go to a 150 when i install a pump, and after the mach is done i will go to a 175 or 200 shot. i will also do some head work when i go up in shot, VE will do wonders to make engines survive. i will either blow it or be in for a hell of a ride.

AggieStang · May 27th, 2008, 02:43 PM

Originally Posted by NXstang

Nitrous Express wet kit....100 shot. You'll be happy with that. The 150 shot doesnt give that much of a gain over a 100 shot to warrant the risk of the extra fuel in an intake that like to puddle fuel.

+1 Thats what I'm running.

Hunt_chevs · November 13th, 2008, 02:33 PM

Originally Posted by commandersafi

most people go with 3.73's if its manual and 4.10 for auto

+1

dragchik01 · November 13th, 2008, 02:43 PM

get colder plugs.. and run octane.. i ran a diable tuner and a zex kit for over a year and a half..on a 125 shot

YouTube - tianas mustang

dragchik01 · November 13th, 2008, 02:45 PM

Originally Posted by Hunt_chevs

+1

its opposite.
373s for auto.. 410s for manual
autos love a 3600 stall converter

SWEET2KSTANG · November 13th, 2008, 08:30 PM

???

uh no, the auto's take full advantage and need the steeper gear. the maunal guys are usually running a 3.73 with a power adder, some 4.10's. and a few with 4.30's.

Reapstang · November 13th, 2008, 08:38 PM

A 100 shot will work just fine. I have been running a 100 shot from NX Wetkit for a while and never had any problems. I would recommend a good tune and a window switch for it for safety and to receive the full benefits from it. Also as far as gears go I say go with the 4.10's, it really isn't that big of a difference from the 3.73's and will do a lot more for you. Don't fear the gear.

SteviGX · November 13th, 2008, 08:47 PM

talk about old therad. good lord

Reapstang · November 13th, 2008, 08:53 PM

Yeah that is kinda embarrassing now that I look and see how old the original post was. God I am such a noob. LOL

dragchik01 · November 14th, 2008, 01:54 AM

Originally Posted by SWEET2KSTANG

???

uh no, the auto's take full advantage and need the steeper gear. the maunal guys are usually running a 3.73 with a power adder, some 4.10's. and a few with 4.30's.

uh no.. with the little hp these cars already start with, they love the 373s..

SWEET2KSTANG · November 14th, 2008, 02:08 AM

for an auto? i dont think so.

beast5319 · November 14th, 2008, 02:40 AM

yea, i've never heard anyone say 3.73 for an auto...ever...

UnixHH · November 14th, 2008, 05:36 AM

Originally Posted by dragchik01

its opposite.
373s for auto.. 410s for manual
autos love a 3600 stall converter

-1

May 26th, 2008, 12:52 AM	#1
throwedoff Regular Join Date: Apr 2007 Location: South Louisiana Posts: 150 iTrader: 0 reviews	Nitrous - What can a mainly stock 4.6 handle? Just bought a 300C a few days ago to use as my daily driver and I'm wanting to dump a little more money into the Mustang and use it as a weekend car. However, I don't want to have to do anything that requires rebuilding my engine yet, because I just got a new engine installed a few months ago, and due to financial limitations at the time, went with a used engine instead of rebuilding the blown one. I've got a 99 GT with a motor with about 50k miles and the only mods I have are P&P Plenum and TB, Exhaust (midpipe, mufflers), SCT Xcal2 tune, and CAI. My question is what kind of nitrous jetting could I safely go with on this engine? I'm assuming I'd need to upgrade my fuel pump, aren't factory pumps only good up to 350 or so horsepower? What else would I need to upgrade? Would I also need to go with colder plugs? I was always anti nitrous, seemed like cheating to me, but I'm starting to cave in to the idea due to the prices, $500-750 for that much horsepower can't be beat. I'd also be going with 3.73s (I hear 3.73s are better than 4.10s for an automatic if you go with nitrous or a supercharger, is that right?). Any input? I'd likely be going with a Zex kit, due to hearing a good bit of things about them. __________________ 1999 GT - CAI, Flowmaster 40s, MAC O/R X-Pipe, 70mm p&p MAC TB, p&p plenum, SCT Xcal2 running 93 octane tune, and heavy ass 20 inch rims.

May 26th, 2008, 01:16 AM	#2
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	some have run 150 but your tune and octane better be spot on. to stay safe leave it at 100 __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

May 26th, 2008, 01:18 AM	#3
throwedoff Regular Join Date: Apr 2007 Location: South Louisiana Posts: 150 iTrader: 0 reviews	So 100 shouldn't cause any problem? Also, the fuel pump will need to be upgraded, rigth? Should I go with colder plugs? __________________ 1999 GT - CAI, Flowmaster 40s, MAC O/R X-Pipe, 70mm p&p MAC TB, p&p plenum, SCT Xcal2 running 93 octane tune, and heavy ass 20 inch rims.

May 26th, 2008, 01:20 AM	#4
NXstang Enlongated Member 2002 Mustang GT 11.95@113MPH Join Date: Apr 2008 Location: Louisville, KY Posts: 313 iTrader: 0 reviews	Nitrous Express wet kit....100 shot. You'll be happy with that. The 150 shot doesnt give that much of a gain over a 150 shot to warrant the risk of the extra fuel in an intake that like to puddle fuel. __________________ 2002 Mustang GT 4V swapped Nitrous best: 7.47@93MPH 1.60 60ft Turbo best: N/A 2008 Pontiac G8 GT Grocery Getter Mineral Gray Club Member #5

May 26th, 2008, 01:46 AM	#5
throwedoff Regular Join Date: Apr 2007 Location: South Louisiana Posts: 150 iTrader: 0 reviews	NXStang, would you recommend 4.10s or 3.73s? I see you have 4.10s, which is why I ask. __________________ 1999 GT - CAI, Flowmaster 40s, MAC O/R X-Pipe, 70mm p&p MAC TB, p&p plenum, SCT Xcal2 running 93 octane tune, and heavy ass 20 inch rims.

May 26th, 2008, 01:50 AM	#6
Safi Safud: MM's Resident Hadji 00 v6 & 99 Cobra Join Date: Apr 2008 Location: Dallas/Houston, Tx Posts: 4,881 iTrader: 4 reviews	most people go with 3.73's if its manual and 4.10 for auto

May 26th, 2008, 02:54 AM	#7
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	when i rebuild my rearend this weekend, i am going to put in a set of 4.10 gears and its a manuel. oh and i picked up 7 mph in the 1/4 mile going from a 100 to a 150 shot, but the key to the puddling problem is to not spray to early. mine doesnt spray till 4000 rpms and shuts off at 6500 rpm __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

May 27th, 2008, 01:42 AM	#8
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,541 iTrader: 8 reviews	i am spraying 125 right now, mine is set to hit at 3200 and shut off at 6k. i will go to a 150 when i install a pump, and after the mach is done i will go to a 175 or 200 shot. i will also do some head work when i go up in shot, VE will do wonders to make engines survive. i will either blow it or be in for a hell of a ride. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 13th, 2008, 08:30 PM	#13
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,541 iTrader: 8 reviews	??? uh no, the auto's take full advantage and need the steeper gear. the maunal guys are usually running a 3.73 with a power adder, some 4.10's. and a few with 4.30's. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 13th, 2008, 08:38 PM	#14
Reapstang Newbie 2002 Mustang GT 12.3 Join Date: Nov 2008 Location: Fritch Texas Posts: 16 iTrader: 0 reviews	A 100 shot will work just fine. I have been running a 100 shot from NX Wetkit for a while and never had any problems. I would recommend a good tune and a window switch for it for safety and to receive the full benefits from it. Also as far as gears go I say go with the 4.10's, it really isn't that big of a difference from the 3.73's and will do a lot more for you. Don't fear the gear. __________________

November 13th, 2008, 08:47 PM	#15
SteviGX Hardcore Enthusiast 2002 Mustang GT 13.538@101.72 before cams&slicks&gears Join Date: May 2007 Location: Indianapolis Posts: 1,544 iTrader: 2 reviews	talk about old therad. good lord __________________ Mineral Gray Club Member #2 Just your average 22 year old dumbass If you didn't build your car, and your bragging about it, STFU

November 13th, 2008, 08:53 PM	#16
Reapstang Newbie 2002 Mustang GT 12.3 Join Date: Nov 2008 Location: Fritch Texas Posts: 16 iTrader: 0 reviews	Yeah that is kinda embarrassing now that I look and see how old the original post was. God I am such a noob. LOL __________________

November 14th, 2008, 02:08 AM	#18
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,541 iTrader: 8 reviews	for an auto? i dont think so. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

November 14th, 2008, 02:40 AM	#19
beast5319 Regular Join Date: Apr 2008 Posts: 377 iTrader: 0 reviews	yea, i've never heard anyone say 3.73 for an auto...ever... __________________ 2000 AUTO GT (TOTALED): 17 inch anthracite bullit wheels (apparently 05+'s), chin spoiler and grill delete, tint. flowmaster 40 weld ons, sct x3 (FOR SALE!!!), 1.5" drop, 1" wheel spacers, and 4.10's (most of this stuff is ruined)

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