Nitrous and gear questions

gpinto2 · 10-26-2001, 01:25 AM

I have a 89 5.0 in my Pinto,with Windsor Jr. heads,1.7 roller rockers,Edelbrock Performer RPM intake and 600 cfm carb pulleys,MSD,125hp shot of nitrous,e-cam with a 4-speed tranny and 9 inch rear.My questions are this do you think my motor is capable of handling a 175hp shot of nitrous and what kind of timing do you guys run with NOS,also which gear do you think would be better for my car 4.11's or 4.56's?THANX==Greg

MikeWeber · 10-26-2001, 05:02 AM

It would depend on tire size, suspension, and stall. For a radical tire/suspension setup, go 4.11. For a mild setup, try the 3.73's. You don't want to run the quarter with all that gear do you?

gpinto2 · 10-26-2001, 06:16 AM

Right now I'm just getting into 4th gear at the end of the 1/4 with 3.55's

10-26-2001, 01:34 PM

I don't think you really want to go over 3.73's.....trust me, there's a big difference between 3.55's and 3.73's. That thing will be screaming at the end of the 1/4. Do you still have a stock fuel system running that 125 shot?

------------------
'90 LX 5.0;12K original miles;FMS 3.55 gears; March pulleys;Edelbrock Performer Heads;BBK 1 5/8" equal length shorties;MSD 6AL ignition w/ blaster 2 coil;FMS E303 cam;Pro-M 75mm MAF;BBK 70mm TB; Eibach drag-launch spring kit;Southside weld-on subs;9" K&N cone filter charger;Hurst shifter;Cervini 3" turbo hood;A/C delete;gutted cats;2 chamber Flomasters;Corbeau racing seats;FMS 30# injectors;JMS custom chip;Holley 190lb fp;TFS track heat intake (12.299 @ 113mph w/ a 1.78 60')
....soon to be b

gpinto2 · 10-26-2001, 07:26 PM

no I'm running a Holley blue fuel pump.

juiceman · 10-26-2001, 10:27 PM

the motor will handle 175 if done properly. as for gear yu will want the tallest gear you can get away with. assuming the motor is stock bottom end 4.11's would be a good choice.3.73's are good for everyday street use , the 4.11's will give you better performance at the track. as for timing, it depends on the motor. i would start at 10 or 12 and work from there. i set mine at 13 and run a hot plug for my 150 shot. the timing should be set at total timing though. not initial. a good start is 34 total. two things i see wrong with your setup are the carb and fuel system. the carb should be at least a 650 for those heads and that much juice. and the holley blue will start to fall short on feeding both the engine and nitrous at mid track and up. a bigger pump or even 2 holley blues would be better and save your motor. you would most likely pick up some time just on the fuel and carb change alone. i that little pinto you should be in the 11's withno problem.

gpinto2 · 10-26-2001, 10:57 PM

The motor is a stock bottom end,my local nitrous dealer recommended Autolite 27 spark plugs for the 125 shot,would you suggest something else for that and the 175 shot?Which carb would you suggest I go with?What about a Torker 2 intake also?

exgmguy · 10-27-2001, 02:30 PM

The motor should easily handle a 175 shot. Just be conservative on the timing, and keep a close eye on the plugs. Maybe spray in just 3rd gear, then immidiately pull a plug.

As far as gear goes, it depends on how fast you are running. I imagine you are going mid-low 12's @ 110 on motor, and 120 plus mph on the hose?

On 3.73's and a 26" tall street tire I was past my 5500 rpm shiftlight trapping 123 mph. I had to go to a 28" tall tire to keep from running out of motor at the end of the track.

------------------
1988 Mustang GT
11.8 @ 123 (7/14/01)
11.5 @ 120 (9/14/01)
1992 BadAzz Wrangler
1993 Explorer

See my car at: www.mustangworks.com/cgi-bin/moi-display.cgi?179

gpinto2 · 10-27-2001, 06:06 PM

I have only taken it to the track once,I launched at 3000 and it bogged down then took off it ran a 12.5,My tires are Hoosier Dot Quicktime 26 X 9.5's,my only other run I made ended with 13.8 because when I hit 2nd she turned and headed for the wall and had to let off.

juiceman · 10-27-2001, 11:35 PM

well, like i said a 650 dp is needed for that setup and a better fuel system. as for plugs, a 27 autolite is a little hot for that much juice. im not an autolite fan though. i like a.c delco r 45 ts. gapped at 35. the intake is gonna be a trial thing. for the most part 302's like the performer rpms especially with some porting and matching. but a good motor will respond well to the torkers with juice but it will want to work in the upper rpms. since that motor should be shifted around 6000 it may work well. work with what you have first and get your current setup to its optimum. only then wil you know what is right for you to buy.
one thing though, since you have a small wheel base car i would spend the money on th rear half of the chassis. especially since its already starting to shoot to the side. and stiffen that thing up.

gpinto2 · 10-28-2001, 01:26 AM

Do you think the new Jegs back half would be the way to go,I see they now make one for the Pinto

gpinto2 · 10-28-2001, 01:49 AM

Sorry for all the questions,this really the first car I have done like this and I want to make sure I do it right the first time

exgmguy · 10-28-2001, 09:08 AM

What are your trap speeds on motor and on spray? A Pinto is a damn light car so I imagine they would be pretty high.

gpinto2 · 10-28-2001, 12:52 PM

I cant find my time slips,but I do remember on the 12.5 run I crossed at 114mph

Dark Knight · 10-28-2001, 03:13 PM

I have a friend with a pinto, 302 with edlebrock heads, C-4 etc, and a 175 shot.. runs 11.0's at 5000 ft in denver, which is in the 10's at a lower altitude... you'll need a roll bar if you run in the 11's.. and some chassis work done... you might look into the MSD timing retard... that way you can bump it up when you arent on the juice ;-)

------------------
84 convt,'95 302,AFR's, performer
3.55's, underdrives BBK shorties
stock cam, 1.7's
13.85@102.5
and a '68 stang that WAS nasty ;-)

10-26-2001, 01:25 AM	#1
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	Nitrous and gear questions I have a 89 5.0 in my Pinto,with Windsor Jr. heads,1.7 roller rockers,Edelbrock Performer RPM intake and 600 cfm carb pulleys,MSD,125hp shot of nitrous,e-cam with a 4-speed tranny and 9 inch rear.My questions are this do you think my motor is capable of handling a 175hp shot of nitrous and what kind of timing do you guys run with NOS,also which gear do you think would be better for my car 4.11's or 4.56's?THANX==Greg

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10-26-2001, 05:02 AM	#2
MikeWeber Registered Member Join Date: Aug 2001 Location: Louisville, KY, USA Posts: 48	It would depend on tire size, suspension, and stall. For a radical tire/suspension setup, go 4.11. For a mild setup, try the 3.73's. You don't want to run the quarter with all that gear do you?

10-26-2001, 06:16 AM	#3
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	Right now I'm just getting into 4th gear at the end of the 1/4 with 3.55's

10-26-2001, 01:34 PM	#4
bada$$lx Guest Posts: n/a	I don't think you really want to go over 3.73's.....trust me, there's a big difference between 3.55's and 3.73's. That thing will be screaming at the end of the 1/4. Do you still have a stock fuel system running that 125 shot? ------------------ '90 LX 5.0;12K original miles;FMS 3.55 gears; March pulleys;Edelbrock Performer Heads;BBK 1 5/8" equal length shorties;MSD 6AL ignition w/ blaster 2 coil;FMS E303 cam;Pro-M 75mm MAF;BBK 70mm TB; Eibach drag-launch spring kit;Southside weld-on subs;9" K&N cone filter charger;Hurst shifter;Cervini 3" turbo hood;A/C delete;gutted cats;2 chamber Flomasters;Corbeau racing seats;FMS 30# injectors;JMS custom chip;Holley 190lb fp;TFS track heat intake (12.299 @ 113mph w/ a 1.78 60') ....soon to be b

10-26-2001, 07:26 PM	#5
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	no I'm running a Holley blue fuel pump.

10-26-2001, 10:27 PM	#6
juiceman Registered Member Join Date: Jan 2001 Location: ny Posts: 197	the motor will handle 175 if done properly. as for gear yu will want the tallest gear you can get away with. assuming the motor is stock bottom end 4.11's would be a good choice.3.73's are good for everyday street use , the 4.11's will give you better performance at the track. as for timing, it depends on the motor. i would start at 10 or 12 and work from there. i set mine at 13 and run a hot plug for my 150 shot. the timing should be set at total timing though. not initial. a good start is 34 total. two things i see wrong with your setup are the carb and fuel system. the carb should be at least a 650 for those heads and that much juice. and the holley blue will start to fall short on feeding both the engine and nitrous at mid track and up. a bigger pump or even 2 holley blues would be better and save your motor. you would most likely pick up some time just on the fuel and carb change alone. i that little pinto you should be in the 11's withno problem.

10-26-2001, 10:57 PM	#7
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	The motor is a stock bottom end,my local nitrous dealer recommended Autolite 27 spark plugs for the 125 shot,would you suggest something else for that and the 175 shot?Which carb would you suggest I go with?What about a Torker 2 intake also?

10-27-2001, 02:30 PM	#8
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	The motor should easily handle a 175 shot. Just be conservative on the timing, and keep a close eye on the plugs. Maybe spray in just 3rd gear, then immidiately pull a plug. As far as gear goes, it depends on how fast you are running. I imagine you are going mid-low 12's @ 110 on motor, and 120 plus mph on the hose? On 3.73's and a 26" tall street tire I was past my 5500 rpm shiftlight trapping 123 mph. I had to go to a 28" tall tire to keep from running out of motor at the end of the track. ------------------ 1988 Mustang GT 11.8 @ 123 (7/14/01) 11.5 @ 120 (9/14/01) 1992 BadAzz Wrangler 1993 Explorer See my car at: www.mustangworks.com/cgi-bin/moi-display.cgi?179

10-27-2001, 06:06 PM	#9
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	I have only taken it to the track once,I launched at 3000 and it bogged down then took off it ran a 12.5,My tires are Hoosier Dot Quicktime 26 X 9.5's,my only other run I made ended with 13.8 because when I hit 2nd she turned and headed for the wall and had to let off.

10-27-2001, 11:35 PM	#10
juiceman Registered Member Join Date: Jan 2001 Location: ny Posts: 197	well, like i said a 650 dp is needed for that setup and a better fuel system. as for plugs, a 27 autolite is a little hot for that much juice. im not an autolite fan though. i like a.c delco r 45 ts. gapped at 35. the intake is gonna be a trial thing. for the most part 302's like the performer rpms especially with some porting and matching. but a good motor will respond well to the torkers with juice but it will want to work in the upper rpms. since that motor should be shifted around 6000 it may work well. work with what you have first and get your current setup to its optimum. only then wil you know what is right for you to buy. one thing though, since you have a small wheel base car i would spend the money on th rear half of the chassis. especially since its already starting to shoot to the side. and stiffen that thing up.

10-28-2001, 01:26 AM	#11
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	Do you think the new Jegs back half would be the way to go,I see they now make one for the Pinto

10-28-2001, 01:49 AM	#12
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	Sorry for all the questions,this really the first car I have done like this and I want to make sure I do it right the first time

10-28-2001, 09:08 AM	#13
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	What are your trap speeds on motor and on spray? A Pinto is a damn light car so I imagine they would be pretty high.

10-28-2001, 12:52 PM	#14
gpinto2 Registered Member Join Date: Jan 1999 Posts: 25	I cant find my time slips,but I do remember on the 12.5 run I crossed at 114mph

10-28-2001, 03:13 PM	#15
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	I have a friend with a pinto, 302 with edlebrock heads, C-4 etc, and a 175 shot.. runs 11.0's at 5000 ft in denver, which is in the 10's at a lower altitude... you'll need a roll bar if you run in the 11's.. and some chassis work done... you might look into the MSD timing retard... that way you can bump it up when you arent on the juice ;-) ------------------ 84 convt,'95 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.85@102.5 and a '68 stang that WAS nasty ;-)