Jason, I am sorry you had a bad experience with RPM. The last time you blasted me on this forum, I asked you to please contact me and I would do whatever was needed to fix the situation. Never heard from you. I remember our discussion regarding the EGT problem, and the symptoms, test conditions, and...

I spoke with them a couple years ago and they didn't have a unit that would work with other data loggers, but on their website (pricing) they now offer a 0 - 5 volt version for $3995.00. It would be very interesting data. I'd like to get one for testing, but the price is still too high for most of o...

The O2 sensors are good for several hours of run time with leaded fuel, which is a lot of passes. Do the free air calibration regularly, as the sensor will drift with use. If the sensor is too contaminated with lead, it won't free air cal correctly. Target EGT temps will vary with combustion chamber...

James, Clutch slip can be read with Engine RPM and Drive RPM as long as the trans is not a lenco style with clutch packs on planetaries, which can also slip. The attached graphs show Engine RPM (red line), Clutch RPM (brown line) and Drive RPM (blue line). Also, in the lower portion of each graph, i...

Unless you have something unusual going on like John did, you are correct. It will show you if you lift, when you lifted, how much you lifted and for how long.

Randy

Lets consider some other factors for a bit. With the power you have, the converter initial stall is about 5500. This converter, from 4000 to 5000, it is not coupling nearly as much power. The initial tirespin, in the first tenth or two is aided by the fact that when the tire "wads up", the...

Sorry for being so late in responding. You are correct, the data indicates that the rear end extends at the hit and plants the tire, then the car squats down as expected. But then, the rebound reduces the actual weight on the tire and you get more tire spin. As evidenced in your G meter by the dip a...

Do you have a shift chip or light? If so, and the tach agrees with the it, I would suspect the logger since two other instruments agree. The O2 readings are seldom completely stable. a variance of .2 to .4 is often the case through a run. Look to see if the varyance is coresponding to RPM. For examp...

Racingj, I really have no idea where this comes from. If I spoke with you, and left you feeling that way, I should be horsewhipped. You have my sincere appologies for not providing the support you needed. It is our primary goal to do whatever it takes to help our customers. We will replace whatever ...

The magnet (just 1) is installed in the input shaft. Typically, this is done by Lenco. You can send them your shaft and they will install the magnet. They will need to know the depth of your can and which type candlestick you have.

Randy

The wide band O2s do have advantages over EGTs. The EGT target temperature will vary according to combustion chamber and piston combination, but the O2 is reading direct Air Fuel ratio, and is more consistent. In typical installations, one O2 in each collector is sufficient, however you need to cons...

Generally, the O2 sensors provide more specific mixture information than the EGTs. The drawback is that they cost twice as much. Adding 8 EGTs to a data logger is about $900, while, for 8 O2s, the price ranges from $1800 to $5000. If you are trying to determine if the manifold is equally distributin...

Todd, When the sensor starts failing due to lead contamination, you will get very inconsistant readings, and it will not calibrate. It's a good idea to calibrate the sensor occationally to correct for the minor changes that may occur due to the leaded fuel. I do mine about every 20 laps. If the sens...

Michael, The guys are right, 100 samples per second is minimum for a rear shock travel sensor. The 12/sec will miss the information you need, mainly the initial extention, set and rebound. If you just want to know the final set extension/squat, it will show that. The low cost sensors mentioned will ...

Thanks for all the good things being said about our RPM Performance data logger. Its good to know our work is appreciated. I understand there are many data logger brands out there, and the choice is not easy. I have heard horror stories about the way some of the companies have treated customers. I c...