oztracktuning
February 3rd, 2006, 05:57 PM
I now have a tank of Boost 98 (10% Ethanol fuel) and did some data collecting regarding stalling it up and what happens off the line.
When i stall it up to about 2000rpm simulating "in stage" the log shows about 70 MAP, 2319rpm and 0.41g/cylinder with a desired AFR of about 14.4 measured was similar.
Then when the throttle is stomped it quickly jumps to 0.80g by 3200rpm (stall speed is 3600) i cant load the engine enough in 1st it spins - but i did it locked in uphill in 2nd gear( mine engages only 2nd).
In the stalled situation at about 2200rpm and 0.40g it has 27.1 degrees timing - by 0.80g and 3200rpm it has steadily curved to 24.2 degrees. When i stomped the throttle i noticed in this one trial in this "stalled - stomped" situation the log showed that it pulled timing down as much as 15 degrees plus in the situation i just saw another 1.6 for knock retard. Is this Burst knock? What do i do with this for an only at the track tune??
My minimum timing which matches when the VE table has the highest g/clyinder is 23.1 in the 5200 and 5600rpm rows. It then goes up to 25.0 until the shift point.
Any suggestions/ideas would be appreciated. I am racing next weekend and hoping for a sub1.6 60 footer.
When i stall it up to about 2000rpm simulating "in stage" the log shows about 70 MAP, 2319rpm and 0.41g/cylinder with a desired AFR of about 14.4 measured was similar.
Then when the throttle is stomped it quickly jumps to 0.80g by 3200rpm (stall speed is 3600) i cant load the engine enough in 1st it spins - but i did it locked in uphill in 2nd gear( mine engages only 2nd).
In the stalled situation at about 2200rpm and 0.40g it has 27.1 degrees timing - by 0.80g and 3200rpm it has steadily curved to 24.2 degrees. When i stomped the throttle i noticed in this one trial in this "stalled - stomped" situation the log showed that it pulled timing down as much as 15 degrees plus in the situation i just saw another 1.6 for knock retard. Is this Burst knock? What do i do with this for an only at the track tune??
My minimum timing which matches when the VE table has the highest g/clyinder is 23.1 in the 5200 and 5600rpm rows. It then goes up to 25.0 until the shift point.
Any suggestions/ideas would be appreciated. I am racing next weekend and hoping for a sub1.6 60 footer.