Deliver Me From Temptation - N2O
09-25-2012, 02:02 PM
#64
tigger, take montes advice on the tune for this setup. rich is NEVER safe more people burn motors with rich tunes than any other tune-up.
stick to the lean/ low timing tunes if you want the engine to keep a set of pistons.
90% of the time people blame a burnt hole on being lean, and 95% of them are wrong......been there done that,
the correct fuel tune along with not running the timing on the edge is a recipe for alot of passes with little hassle.
stick to the lean/ low timing tunes if you want the engine to keep a set of pistons.
90% of the time people blame a burnt hole on being lean, and 95% of them are wrong......been there done that,
the correct fuel tune along with not running the timing on the edge is a recipe for alot of passes with little hassle.
Please enlighten me on what happens to these motors your blowing up with a slightly rich/fat tune.
Tell me about the holes your finding in pistons with a rich/fat tune. How are you theorizing doing this?
Now if your running your timing wrong, thats on you, thats not because of the fuel mixture. I realize both need to be correct, but I have never saw this terrible damage your talking about from being a little rich on fuel.
I stated my opinion on the matter earlier your posts seems to be aimed at discrediting my opinion. I'm not "name dropping" anyone. My opinion is formed from my tuning and racing.
NO ENGINES HAVE BEEN HARMED IN MY EXPERIMENTING.
Last edited by The stunningman; 09-25-2012 at 02:08 PM.
09-26-2012, 03:30 PM
#65
Please enlighten me on what happens to these motors your blowing up with a slightly rich/fat tune.
Tell me about the holes your finding in pistons with a rich/fat tune. How are you theorizing doing this?
Now if your running your timing wrong, thats on you, thats not because of the fuel mixture. I realize both need to be correct, but I have never saw this terrible damage your talking about from being a little rich on fuel.
I stated my opinion on the matter earlier your posts seems to be aimed at discrediting my opinion. I'm not "name dropping" anyone. My opinion is formed from my tuning and racing.
NO ENGINES HAVE BEEN HARMED IN MY EXPERIMENTING.
Tell me about the holes your finding in pistons with a rich/fat tune. How are you theorizing doing this?
Now if your running your timing wrong, thats on you, thats not because of the fuel mixture. I realize both need to be correct, but I have never saw this terrible damage your talking about from being a little rich on fuel.
I stated my opinion on the matter earlier your posts seems to be aimed at discrediting my opinion. I'm not "name dropping" anyone. My opinion is formed from my tuning and racing.
NO ENGINES HAVE BEEN HARMED IN MY EXPERIMENTING.
As for being a little rich, I am sure that is not a big deal. However, in one of your earlier posts you said you had a "63 N20 71 Fuel" jet spread. By today's nitrous technology standards that and crazy rich.
I realize that is what the jets spreads were on the old NOS kits from the 80s and early 90s. However, all of the nitrous gurus including those who work for and have worked for NOS like Monte Smith & Mike Thermos as well as other like Steven Johnson from Induction Solutions are recommending a 10 jet spread with a larger nitrous jet than fuel at about 5 pounds of fuel pressure (carbureted).
So for your power level they are advising 63 nitrous and 53 fuel as a starting point.
If you go where the big nitrous boys are over at Yellow Bullet and do so searches and some reading, you can find where they talk about what damage a rich tune does.
09-26-2012, 04:24 PM
#66
10 Second Club
Too rich is as bad as too lean....both will destroy an engine.
Now you can be a little off one way or the other and be fine, but once you get outta that "safe zone"
Now you can be a little off one way or the other and be fine, but once you get outta that "safe zone"
09-26-2012, 04:47 PM
#67
Safe is slightly rich. Not pig rich. They both are bad in any extreme, one blows holes in pistons the other blows off ring lands, from my experience anyway. Lol, glad they were not mine. On my sniper kit, to get 12.0:1 I had the 150 jet nitrous and the 100 fuel.
09-26-2012, 09:46 PM
#68
Wow. I did not see anyone attack you in this thread including buschmec.
As for being a little rich, I am sure that is not a big deal. However, in one of your earlier posts you said you had a "63 N20 71 Fuel" jet spread. By today's nitrous technology standards that and crazy rich.
I realize that is what the jets spreads were on the old NOS kits from the 80s and early 90s. However, all of the nitrous gurus including those who work for and have worked for NOS like Monte Smith & Mike Thermos as well as other like Steven Johnson from Induction Solutions are recommending a 10 jet spread with a larger nitrous jet than fuel at about 5 pounds of fuel pressure (carbureted).
So for your power level they are advising 63 nitrous and 53 fuel as a starting point.
If you go where the big nitrous boys are over at Yellow Bullet and do so searches and some reading, you can find where they talk about what damage a rich tune does.
As for being a little rich, I am sure that is not a big deal. However, in one of your earlier posts you said you had a "63 N20 71 Fuel" jet spread. By today's nitrous technology standards that and crazy rich.
I realize that is what the jets spreads were on the old NOS kits from the 80s and early 90s. However, all of the nitrous gurus including those who work for and have worked for NOS like Monte Smith & Mike Thermos as well as other like Steven Johnson from Induction Solutions are recommending a 10 jet spread with a larger nitrous jet than fuel at about 5 pounds of fuel pressure (carbureted).
So for your power level they are advising 63 nitrous and 53 fuel as a starting point.
If you go where the big nitrous boys are over at Yellow Bullet and do so searches and some reading, you can find where they talk about what damage a rich tune does.
I have over 50 passes (probably way over) all the passes look as clean as the one in my sig. Spray out the gate ....No Black smoke anfd my plugs look fine when I cut them up. I just recently had the heads off during my Fairmont swap. Everything is AOK. I will also be spraying the fairmont. I will check out the yellow bullet articles but I don't see the damage this guy is talking about coming from a rich mixture.
Last edited by The stunningman; 09-26-2012 at 09:53 PM.
09-26-2012, 10:31 PM
#69
Quick glimpse over there and this is the theory on the lifted ring lands.
Too much fuel..
Fuel gets trapped under the ring..
Fuel explodes on the next firing cycle and lifts ring land..
Ring gets stuck...
Oil rushes in..
Nitrous...gas..oil cause thermal melt down...
I don't buy into all this. And it seems like every piston failure at yellow bullet was caused by the mixture was to rich lol. I guess I know where buschmech gets all his advice. Honestly if I was a "on the fence", after looking in their piston failure thread I would NEVER spray a engine.
Too much fuel..
Fuel gets trapped under the ring..
Fuel explodes on the next firing cycle and lifts ring land..
Ring gets stuck...
Oil rushes in..
Nitrous...gas..oil cause thermal melt down...
I don't buy into all this. And it seems like every piston failure at yellow bullet was caused by the mixture was to rich lol. I guess I know where buschmech gets all his advice. Honestly if I was a "on the fence", after looking in their piston failure thread I would NEVER spray a engine.
09-27-2012, 08:37 AM
#71
Always error on the rich side. If theres not enough fuel, your engine parts will be next. Just saying from a lot of exprience. I have in all my 20+ years of engine building never seen a injury from to rich. Unless it is insaning rich, I dont see how it can happen.
09-29-2012, 09:10 PM
#73
Spent the whole day re-wiring today. The one thing that I did makeshift when I was finishing my car was the final wiring. I wanted to drive it now! 
Well, it was time to pay the piper and do it right. Wiring is sooo freakin' time consuming. But, now I have a nice modern auxiliary fuse box with plenty of extra circuits and all of my wiring is organized in looms and sheathing. I also added a convenience panel in the engine compartment for a central location for relays and such.
I also finally wired my lock up torque converter. I drove around playing with it. It is nice to have.
I am going to try to make test and tune Wednesday for final tuning with the new 950HP and see how advancing the cam affects the times. Then I will be ready to start the nitrous install.
Well, it was time to pay the piper and do it right. Wiring is sooo freakin' time consuming. But, now I have a nice modern auxiliary fuse box with plenty of extra circuits and all of my wiring is organized in looms and sheathing. I also added a convenience panel in the engine compartment for a central location for relays and such.
I also finally wired my lock up torque converter. I drove around playing with it. It is nice to have.
I am going to try to make test and tune Wednesday for final tuning with the new 950HP and see how advancing the cam affects the times. Then I will be ready to start the nitrous install.
10-04-2012, 07:14 PM
#79
The nitrous experts I engaged on YellowBullet to said square jetting is way over rich. They said for a 150 shot at 5 psi fuel pressure to use an 8 to 10 spread to start and would probably even end up with more spread. These are people like Monte Smith, Mike Thermos and Steve Johnson.
10-06-2012, 07:04 AM
#80
I tried to go to the local 1/8 mile track last night, but the track was un-raceable. The track has new owners and the place was a disaster, so I will have to make the hour and a half drive to the quarter mile track next week if I want to get the final pre-nitrous tune done.
I've got the line in the car. Today I will mount the bottle and set up the heater andblow down system.
I've got the line in the car. Today I will mount the bottle and set up the heater andblow down system.