bill2
12-22-2005, 01:43 AM
I've been messing around with holding HOM with my stage 2 kit and figured i'd give my results and notes.
--Initially i was injecting the mixture right before the charge temp sensor in the stock hardpipe, this combo and 91 octane would not hold hom. I played around with when i was injecting, what i was injecting ect, but could not get any kind of positive results. Also added an ais intercooler, slight improvement, but not what we're looking for.
--Next i ordered a hardpipe from JMB performance with a bung for an injection jet about 6" from the throttle body with the charge temp sensor relocated a few inches lower than the injection jet. With this setup and 85+ deg temps and 91 octane hom would disengage around 5200rpms in third gear.
--Next i mixed in 104 octane to bring my octane to 94- results- holds to redline in 3rd in 85+ deg weather. I then proceded to dilute the mixture till i reached 92- results - same as with 94.
--Now that ambients have come down considerably, i was able to figure the warmest temp i could hold hom with 91 octane- roughly 70deg.
I'm running 85/15 water/meth on a snow performance kit. The car also has an ais front mount, lorenzo tb and perrin turbo back exhaust. I've pushed it in fourth gear but i'm not looking for a ticket :) , so no "fourth gear to redline." I wanted to make a couple 1/4 mile passes before i posted up what i've come up with so far, but it will be a few weeks until i'll be able to do so.
--Initially i was injecting the mixture right before the charge temp sensor in the stock hardpipe, this combo and 91 octane would not hold hom. I played around with when i was injecting, what i was injecting ect, but could not get any kind of positive results. Also added an ais intercooler, slight improvement, but not what we're looking for.
--Next i ordered a hardpipe from JMB performance with a bung for an injection jet about 6" from the throttle body with the charge temp sensor relocated a few inches lower than the injection jet. With this setup and 85+ deg temps and 91 octane hom would disengage around 5200rpms in third gear.
--Next i mixed in 104 octane to bring my octane to 94- results- holds to redline in 3rd in 85+ deg weather. I then proceded to dilute the mixture till i reached 92- results - same as with 94.
--Now that ambients have come down considerably, i was able to figure the warmest temp i could hold hom with 91 octane- roughly 70deg.
I'm running 85/15 water/meth on a snow performance kit. The car also has an ais front mount, lorenzo tb and perrin turbo back exhaust. I've pushed it in fourth gear but i'm not looking for a ticket :) , so no "fourth gear to redline." I wanted to make a couple 1/4 mile passes before i posted up what i've come up with so far, but it will be a few weeks until i'll be able to do so.