Fast C3 gets faster!
Racer
Joined: May 2005
Posts: 275
Likes: 0
From: Dix Hills New York
Originally Posted by GrandSportC3
I wonder what fuel pressure I'll have to run to a 100 shot? I'm thinking in branching the nitrous off at the regulator which is set to 6.5 - 7 lbs of pressure.. Will this be enough?
Racer
Joined: May 2005
Posts: 275
Likes: 0
From: Dix Hills New York
NEWER 23 DEGREE HEADS CAME A LONG WAY AND MAKE GREAT POWER , 18 deg. are readily avail ,actually cheap for good used one so to me its a short cut to use the 18deg. make power easy adjust chassis...it just depends on what u presently have, 23' pistons, manifold,ect..but from scratch...18 deg u get the point
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by C3AV
start at 6.5 or 7 psi u will end up lowering it--there is so much more ,ill explain as these nights go by.timing--so important then retard control,how and when,theres engine time, retard time ,bottle press.plate ,fogger---plugs yea we know colder--there is more ..how to read them. not to drive back to the pits and then check them is n. g. are u bored? theres more
I run the jest square for now. When I build the next motor and spray upwards of 500 total on a plate and a Fogger, I will run higher pressure tunes. Fuel pressure up around 9-11 psi.
Oliver, you would have to try pretty hard to mess something up on a 100 shot. At that level the tunes are very forgiving if you miss it by a bit.....spray 400 at that smallblock of yours and the forgiveness window is much more narrow.
C3AV obviously knows nitrous well also.
Last edited by 69 N.O.X. RATT; Nov 28, 2006 at 11:45 PM.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Right now, I only have one regulator. I really can't go below 6 lbs of pressure zo that the carb gets enough fuel.. If the tuning really won't work out, I'll have to go with a 2nd regulator and branch off the fuel before the carb fuel presure regulator and run a 2nd regulator..
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
Right now, I only have one regulator. I really can't go below 6 lbs of pressure zo that the carb gets enough fuel.. If the tuning really won't work out, I'll have to go with a 2nd regulator and branch off the fuel before the carb fuel presure regulator and run a 2nd regulator..
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by 69 N.O.X. RATT
Yes do that, otherwise it won't make much power. The alternative is to run the numbers and figure out the proper N/F ratio at whatever fuel pressure you run to the carb. That is what we did on my buiddies Mopar.
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
Another thing.. I'm running 112 leaded right now. Should I step up to 114 octane with the spray?
I know guys that know how to read nitrous plugs and have sprayed 500 hp for years and never hurt anything.
If you go to yellowbullet.com and gofastzone.com....look around a little you will find good articles on nitrous and nitrous plug reading. When you start running the stuff you can post some pics of your plugs and I will let you know what I think about your tune.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by 69 N.O.X. RATT
For a 100 shot no need (make sure you pull 4* of timing).....saying that Oliver, we need to teach you how to read a nitrous plug. I know you are just getting started in the nitrous game but if you ever want to run big hits, ya gotta know what the plug is telling you.
I know guys that know how to read nitrous plugs and have sprayed 500 hp for years and never hurt anything.
If you go to yellowbullet.com and gofastzone.com....look around a little you will find good articles on nitrous and nitrous plug reading. When you start running the stuff you can post some pics of your plugs and I will let you know what I think about your tune.
I know guys that know how to read nitrous plugs and have sprayed 500 hp for years and never hurt anything.
If you go to yellowbullet.com and gofastzone.com....look around a little you will find good articles on nitrous and nitrous plug reading. When you start running the stuff you can post some pics of your plugs and I will let you know what I think about your tune.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Just read the online instructions and Edelbrock recommends 6.5 - 7 PSI of fuel pressure for their kit. That's perfect as that's the fuel pressure that I'm running to the carb and I can just branch the fuel for the nitrous system off the regulator!
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
Just read the online instructions and Edelbrock recommends 6.5 - 7 PSI of fuel pressure for their kit. That's perfect as that's the fuel pressure that I'm running to the carb and I can just branch the fuel for the nitrous system off the regulator!
The chances are 99% it will make more power with less fuel pressure.....but it is ok to run it a little rich until you are more comfortable running nitrous. A common miscomception is richer is safer. It is easier to hurt the motor running too rich, than too lean (in general)
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by 69 N.O.X. RATT
It is probably not perfect..all nitrous companies list their tunes rich so the average knucklehead won't blow his stuff up. What size jets does the Edelbrock kit run at the 100 hp level?
The chances are 99% it will make more power with less fuel pressure.....but it is ok to run it a little rich until you are more comfortable running nitrous. A common miscomception is richer is safer. It is easier to hurt the motor running too rich, than too lean (in general)
The chances are 99% it will make more power with less fuel pressure.....but it is ok to run it a little rich until you are more comfortable running nitrous. A common miscomception is richer is safer. It is easier to hurt the motor running too rich, than too lean (in general)
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
Their jetting for 100 HP is 55 nitrous and 61 for fuel at 32 degrees timing..
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by 69 N.O.X. RATT
That is pig rich......at least square the jets (both the same size) and run your 6.5 lbs. What you could also do is give the guys I get my jets from (Nitroussupply 714 373 1986) and order some jets. They sell stainless jets for 3 bucks each, best deal out there. Lets say you decide to run 55 on both sides at 6.5 lbs fuel pressure. Order a 57 and a 59 and since you have a 61 you got that covered. Go to the track make a run at 55 squared, take a look at the plugs and if it is rich pop the 57 in on the nitrous side, and go make another run....it will surely pick up a little...read the plug and if it is still rich pop the 59 in on the nitrous side and repeat. I know what your goals are in regards to running in the 9's only every now and then, but this will allow you to do a little experimeneting without the risk of hurting anything.
I doubt that I'll be running only a 100 shot once I'll get really serious with that stuff... If my calculations are correct, I should only need a 75 HP increase to hit 9's on a cold winter day..so, even if I only gain 75 HP, it should be enough.. I want to add the least amount of spray ro reach my goal and not harming any other components... (tranny and posi)
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by GrandSportC3
I'll start with their recommended setup as baseline and will tune from there and get some different jets...
I doubt that I'll be running only a 100 shot once I'll get really serious with that stuff... If my calculations are correct, I should only need a 75 HP increase to hit 9's on a cold winter day..so, even if I only gain 75 HP, it should be enough.. I want to add the least amount of spray ro reach my goal and not harming any other components... (tranny and posi)
I doubt that I'll be running only a 100 shot once I'll get really serious with that stuff... If my calculations are correct, I should only need a 75 HP increase to hit 9's on a cold winter day..so, even if I only gain 75 HP, it should be enough.. I want to add the least amount of spray ro reach my goal and not harming any other components... (tranny and posi)
Melting Slicks
Joined: Feb 2006
Posts: 2,209
Likes: 0
From: Mo
I suggest if anyone is new to the nitrous world,keep it rich,I have played with it for years and everytime I think I have it figured out something happens to teach me something new.It doesn't take to many melted down 50k race engine to get educated.
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by l88rocket
I suggest if anyone is new to the nitrous world,keep it rich,I have played with it for years and everytime I think I have it figured out something happens to teach me something new.It doesn't take to many melted down 50k race engine to get educated.
A lot of guys do not realize that running too rich can cause fuel to get under the top ring (right under the intake valve) and when it ignites it will tear the top of the piston off. I hang out over at nitrous supply a lot and there is a lot of destroyed pistons lying around that people have sent in asking what went wrong. I have seen lots more with these symptoms rather than the lean stuff that will burn pistons up.
Melting Slicks
Joined: Feb 2006
Posts: 2,209
Likes: 0
From: Mo
Originally Posted by 69 N.O.X. RATT
I agree......to a point. I prefer to run it right, not rich or lean, but right. That being said I aim for a tune that is a little rich if I am working someting up that is new, but then after a pass I do a plug read and try to get it closer to ideal.
A lot of guys do not realize that running too rich can cause fuel to get under the top ring (right under the intake valve) and when it ignites it will tear the top of the piston off. I hang out over at nitrous supply a lot and there is a lot of destroyed pistons lying around that people have sent in asking what went wrong. I have seen lots more with these symptoms rather than the lean stuff that will burn pistons up.
A lot of guys do not realize that running too rich can cause fuel to get under the top ring (right under the intake valve) and when it ignites it will tear the top of the piston off. I hang out over at nitrous supply a lot and there is a lot of destroyed pistons lying around that people have sent in asking what went wrong. I have seen lots more with these symptoms rather than the lean stuff that will burn pistons up.
Yeaah over rich is bad too,but I tickle on the rich side is safest for a newbie.I didn't mean to sound like it should be pig rich.
I have seen more burned pistons than rich pistons,but I have always played on the leaner tune's trying to be killer fast.when I ran my PM,we changed pistons every 16-20 runs because we leaned on it so hard,I have seen nitrous guys at ADRL race's changing pistons after every run.
Melting Slicks
Joined: Feb 2006
Posts: 2,209
Likes: 0
From: Mo
I also firmly believe that nitrous should have it's own fuel system,I know guys going to bigger pumps and running it all that way,I am sure you guys that race with it know that maintance on nitrous systems is a must,I have seen guys that don't check fuel pressure or bottle temp between rounds and they can't fiqure out why it blowed up.
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by l88rocket
I also firmly believe that nitrous should have it's own fuel system,I know guys going to bigger pumps and running it all that way,I am sure you guys that race with it know that maintance on nitrous systems is a must,I have seen guys that don't check fuel pressure or bottle temp between rounds and they can't fiqure out why it blowed up.
I am waiting for the big melt down.