Tune ups

[GlennLever]

I got a Computech for Christmas.

Up to now I have been using a Kestrel 4000.

I have been adjusting my tune-up by changing the blower pulley to get the right Air Fuel Ratio (running Air Density, Humidity, temperature through a calculator).

The new computer wants to adjust the main pill to adjust the air fuel ratio. (it is more sensitive in that it takes in water pressure(water grains))

Have I been doing it wrong?

I have been pretty much on the money (running an index of 8.0).

[Spud Miller]

 Hi Glenn!

 Likely, someone decided that figuring a new pill would serve both supercharged and naturally aspirated people using their weather device.

 If you're blown, I think changing the pulley is absolutely the best way to be consistent...making up for nature's shortcomings in available oxygen instead of simply compensating the amount of fuel to get the AFR right. Since you have a "belt-driven manifold", you might as well use it!

 So, I'd keep doing what you're doing. It's been working!

 Spud

[Totally T]

Ohhhhhnooooo....Dont listen to some so called expert 

You just go right on ahead and switch to the Computech!!!



Oh BTW, I might be interested in the Kestrel!



 

[dreracecar]

I have a Kestral and a Gorr/Casio calculater
If stuck in the stageing lanes for a long period I have seen the temps rise and drop in what seems like an instant. I can change jets faster or adj timing in small increments faster than I can swap out a pulley when rolling to the fireup area. There is no instant answer, you have to discover what works best for YOUR combination. I have enough data that I know what pulleys to run and stick with throughout the weekend based on density alt, I have enough data that tells me by advanceing/retarding Ingnition how that affects blower boost and what jets numbers will move the ETs up or down.

[GlennLever]

Ohhhhhnooooo....Dont listen to some so called expert 

You just go right on ahead and switch to the Computech!!!



Oh BTW, I might be interested in the Kestrel!



 

I'll need both for awhile to compare, I have consulted Steve in the past and there is usually a 300 foot difference in air density between them. I attribute the difference to water pressure.

[GlennLever]

 Hi Glenn!

 Likely, someone decided that figuring a new pill would serve both supercharged and naturally aspirated people using their weather device.

 If you're blown, I think changing the pulley is absolutely the best way to be consistent...making up for nature's shortcomings in available oxygen instead of simply compensating the amount of fuel to get the AFR right. Since you have a "belt-driven manifold", you might as well use it!

 So, I'd keep doing what you're doing. It's been working!

 Spud

Pulleys it is. Would you change the jet when the pulley is in the middle of an adjustment?

[32bantam]

Nice try Troy  !!!!!!!  LMAO