Nitrous and Traction?
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 996
Likes: 0
From: Frisco Texas
Nitrous and Traction?
Hi all!
I am thinking of putting a 75 shot on my heads/cam but have a few questions:
1. Right now at 400 rwhp I dont get any traction before second and get sideways on my 1st to second shift. I want to be able to use it in second but I am affraid it will only make me spin worse. (I run 305 nitto drag radials.)
2. I only run 22 degrees timing, any higher I get some knock retard. I have 53cc milled heads. I can use my HP Tuners to retard timing based on IAT. I plan to spray a dry shot in the air filter. How much fuel will I need to add?
3. I trap around 118 easing into the throttle,what do you think I would trap on a 75 shot?
I just need some reassurance before dropping another $1500 into my vette.
Thanks
I am thinking of putting a 75 shot on my heads/cam but have a few questions:
1. Right now at 400 rwhp I dont get any traction before second and get sideways on my 1st to second shift. I want to be able to use it in second but I am affraid it will only make me spin worse. (I run 305 nitto drag radials.)
2. I only run 22 degrees timing, any higher I get some knock retard. I have 53cc milled heads. I can use my HP Tuners to retard timing based on IAT. I plan to spray a dry shot in the air filter. How much fuel will I need to add?
3. I trap around 118 easing into the throttle,what do you think I would trap on a 75 shot?
I just need some reassurance before dropping another $1500 into my vette.
Thanks
Drifting
Joined: Dec 2002
Posts: 1,472
Likes: 1
From: Reynoldsburg oh
Originally Posted by cscollis
Hi all!
I am thinking of putting a 75 shot on my heads/cam but have a few questions:
1. Right now at 400 rwhp I dont get any traction before second and get sideways on my 1st to second shift. I want to be able to use it in second but I am affraid it will only make me spin worse. (I run 305 nitto drag radials.)
2. I only run 22 degrees timing, any higher I get some knock retard. I have 53cc milled heads. I can use my HP Tuners to retard timing based on IAT. I plan to spray a dry shot in the air filter. How much fuel will I need to add?
3. I trap around 118 easing into the throttle,what do you think I would trap on a 75 shot?
I just need some reassurance before dropping another $1500 into my vette.
Thanks
I am thinking of putting a 75 shot on my heads/cam but have a few questions:
1. Right now at 400 rwhp I dont get any traction before second and get sideways on my 1st to second shift. I want to be able to use it in second but I am affraid it will only make me spin worse. (I run 305 nitto drag radials.)
2. I only run 22 degrees timing, any higher I get some knock retard. I have 53cc milled heads. I can use my HP Tuners to retard timing based on IAT. I plan to spray a dry shot in the air filter. How much fuel will I need to add?
3. I trap around 118 easing into the throttle,what do you think I would trap on a 75 shot?
I just need some reassurance before dropping another $1500 into my vette.
Thanks
Traction on the street will be non existant. At the track if you warm them up will be decent. You might wanna back the timing down a degree or 2. They say 1 degree per 50 hp on the juice. If you are trapping 118 now, I would say you will trap 124-125 with a 75 shot. Might be alittle more. I went from a 107 trap to a 121 trap with a 150 shot on my car.
HTH
Thread Starter
Burning Brakes
Joined: Jun 2002
Posts: 996
Likes: 0
From: Frisco Texas
Originally Posted by sprayedc5
Traction on the street will be non existant. At the track if you warm them up will be decent. You might wanna back the timing down a degree or 2. They say 1 degree per 50 hp on the juice. If you are trapping 118 now, I would say you will trap 124-125 with a 75 shot. Might be alittle more. I went from a 107 trap to a 121 trap with a 150 shot on my car.
HTH
HTH
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
rule of thumb is you should get 1 sec and 10 mile/hour in the 1/4 off a 100 shot. That is in a perfect world where you get traction. I would say short shift 2md gear to get traction. If you are getting knock already I would definitly retard timing on the sauce.
Race Director
Joined: Aug 1999
Posts: 16,935
Likes: 26
From: Lackey, my own dragstrip VA.
Virginia Events Coordinator
Cruise-In IV Veteran
Cruise-In V Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
NCM Ambassador
FWIW,
With what you already have you need to tub & stuff
One for the street and one for the strip, then you will have traction
With what you already have you need to tub & stuff
One for the street and one for the strip, then you will have traction
Advanced
Joined: Aug 2003
Posts: 91
Likes: 0
From: Melbourne FL
Wow! That 345/35 is a pretty tall tire. I use the Toyo RA1 (World Challenge GT tire) in a 335/30x18 and, along with the DTE rear diff. strut brace, I have very little traction problems on the street in any gear. I have an MTI Stage 2E heads (on LS6 motor) with their C1 cam, 11.0:1 compression, and TNT 125hp wet kit making 600 rwtq. One tip,... you might as well tub the car out or else get a 17" wheel and mount 17" ET Streets (in 10.5" series) for the strip. The funny thing about tubbing a car is this: you do it to fit wider tires on the car for more lateral grip, not forward grip. If you want forward grip, you go with a taller tire, lower the air pressure, and compensate for it by using a higher numerical gear in your differential. I got my 335 tires (on Hickock wheels) for autocrossing, not drag racing. The Hickocks are the lightest wheels on the market for the C5/Z06 and I'm still 5 pounds heavier than a stock rear Z06 wheel/tire combo. Sometimes guys bolt on big, wide wheels and tires and hook up only because they added a substantial amount of rotational weight to the corners. Multiple the extra weight by 10 to get the effective addition of weight to the car. So think it through before you solve your problem with simply wider tires for going straight. Just my $0.10 worth!
