Monty Mikho
08-11-2006, 02:26 AM
Why should I tune the motor to run good if I always plan to spray it?
I get this question a lot from people at the track..
What some people forget is even if you are spraying your car all the way down the track every time it is important to tune the motor to run very well on motor first. Why you may ask? Remember when you are doing your burn out you are running on motor alone!! So what the car does a burn out fine.. And that is great. But your very next step is to get to the line N/A and get on the converter N/A!! Any unburned fuel or even lean spots will exist once the button is released. This will add to the mix of what the motor will do once nitrous is introduced to it. If you are running pig fat and the motor is loading up at the line. This unburned fuel will find a way to burn once nitrous gets there. This will usually result in trapping fuel between the rings (top and second) and possibly cause a lifted ring land. This will pinch the ring and allow oil to enter the combustion chamber at that point. Its all melt down city from there. To get a good nitrous tune ups it is very important for it to start from the starting line all the way to the finish line.
Well, I use very cold plugs and they load up no matter what!!
This is where timing control become very handy. Personally my motor liked a max of 30* of timing on motor with -10 NGK plugs. As a matter of fact it would blue the plugs at 31 degrees on the dyno. But this is with heavy loads on the motor. So what does this mean? Well when the motor is not loaded it can use more initial timing. For me an additional 10* of timing below 3800 RPM worked great. My converter would stall at 3800 on a 2 step.. So I would ramp back out from 40 to 30 minus my nitrous timing till the converter grabbed at 6800 RPM. Tooling around the pits the plugs were not loaded. They also looked great after getting on the converter. So it is very important to get the tune up on motor right before putting the bottle to it. There is more to the picture than just running your motor on nitrous.. Hope this helps somewhat...
I get this question a lot from people at the track..
What some people forget is even if you are spraying your car all the way down the track every time it is important to tune the motor to run very well on motor first. Why you may ask? Remember when you are doing your burn out you are running on motor alone!! So what the car does a burn out fine.. And that is great. But your very next step is to get to the line N/A and get on the converter N/A!! Any unburned fuel or even lean spots will exist once the button is released. This will add to the mix of what the motor will do once nitrous is introduced to it. If you are running pig fat and the motor is loading up at the line. This unburned fuel will find a way to burn once nitrous gets there. This will usually result in trapping fuel between the rings (top and second) and possibly cause a lifted ring land. This will pinch the ring and allow oil to enter the combustion chamber at that point. Its all melt down city from there. To get a good nitrous tune ups it is very important for it to start from the starting line all the way to the finish line.
Well, I use very cold plugs and they load up no matter what!!
This is where timing control become very handy. Personally my motor liked a max of 30* of timing on motor with -10 NGK plugs. As a matter of fact it would blue the plugs at 31 degrees on the dyno. But this is with heavy loads on the motor. So what does this mean? Well when the motor is not loaded it can use more initial timing. For me an additional 10* of timing below 3800 RPM worked great. My converter would stall at 3800 on a 2 step.. So I would ramp back out from 40 to 30 minus my nitrous timing till the converter grabbed at 6800 RPM. Tooling around the pits the plugs were not loaded. They also looked great after getting on the converter. So it is very important to get the tune up on motor right before putting the bottle to it. There is more to the picture than just running your motor on nitrous.. Hope this helps somewhat...