ORIGINAL: rmh

The compared power output (no dynos needed ) on my 1.4 Tigre setup was quite interesting
Without changing compression (a simple gasket change) I gor MORE power on same props using the 5% fuel and spark ignition, than I did using 30% nitro fuels
(actually the fuel I used was Heli #2 by Magnum fuel a very good fuel.)
The ignition setup started very easily and the extra power (which really surprised me ) was from being able to st the firing exactly when I wanted it . and it stayed there As I remember the typical setup ran 10000 on 18x8 APC
For those who don't know - a real problem with glow is that the timing (when the charge actually ignites) changes with heat
The wretched OS supercharged 1.2 of the past really suffered from this
I modified the heads to drop compression and got serious power frome these engines
OS stuffed the transfer pipe and restricted the intake at the carb base to try and solve the preignition which occurre d as the blower built up pressure (and heat.
An ignition setup would have solved the problem but none were available at the time.
The I am still surprised that the pattern guys have not discovered how well a alky and spark setup really runs
Probably because it does not cost enough
no Braggin rights.
PS at 2.50 a gallon for alky (thats a awfully GOOD price) plus up to 10 bucks a quart for really good synthetic - and a splash of nitro - fuel should be well under 10 bucks a gallon

Gas fuel I use costs me $2.50 for the gas and the all synthetic iol which is all I ever use - is $40 per gallon - but of course I use 35-1 not a 20% oil mix.