Antilag_200 attempts a Wire Tucking Project: PRESHOOTOUT BUILD by antilag_200

3 minute(s) of a 128 minute read

No real updates for me, Still working on the boost and timing curve .. Recent pulls are right around 650Hp and 520TQ with 7 degrees of timing up top. 

I have been trying to understand and correlate small incremental steps in timing and how these correlate with an increased/ decreased Torque curve. This is sometimes very frustrating to work with because I feel that this type of testing is better suited to a dyno versus a Roadway..

Someone sent me pictures of a recent car show that I attended. Thank you to the fellow that took these pictures. Notice the Sparktech Covers from Evodan, that I had annodized Black to complete my Ignition set up. 

enjoy

6-13-2013

So over the last few weeks I have been doing timing sweeps , air fuel ratio sweeps and boost sweeps, to really check the characteristics of the engine , the efficiency of the set up and just how by manipulating each of these factors, the Torque curve and given output can change.

Here is basically where I am at with the car, 37-38 psi about 12.0 afr and about 7-8 degrees of timing 

Whats interesting about the curve above is two fold:

1) 3-4 psi more boost = over 50HP, with only 14TQ gain

2) minimal timing NOT in the peak torque area, was able to sustain this.

Now to the tuners out there, I am surprised by this, because typically one would see about 9HP/psi but this is always in conjunction with increasing the timing in those peak areas too. Interesting stuff

Next, I have been plotting Knock Voltage and Knock sum versus time during the pulls : here are two graphs 

This is at 40 psi and 13 degrees of timing ( gave just under 700hp)

Notice the spike, with rather "normal voltage" ?

Now look at this one ( 38 psi, 8 degrees) ( Less load compared to the graph above)

Notice the voltage spike ?

I have definitely learnt something new.

enjoy the data.