I understand that the 110+ octane of propane allows for much higher SCR (static compression) and DCR (dynamic compression).
I can build a motor up to 13:1 SCR but am not sure what to aim for regarding DCR which is the working compression. A decent pump gas motor will be 7.5-8.1:1 DCR and a performance motor buring race gas will be around 9:1 DCR.
Does anyone know what I should be looking for with propane and why? ie heat build up etc. I'm not wanting to burn things up!
thanks- cut my teeth of cochise but didn't have victory- good stuff. I wonder why so much fuss is made about scr when it can be so misleading to new folks - or even some intermediate builders. Some one can be all proud and happy with an 11.1 compression then blow the engine using a light cam or turn it into a dog using a huge one. Theres a lot of threads of folks who built em to find they had problems with premium fuel when they could have had a great motor burning 87.
I could have really blown my build had i gone with some of the initial recommendations I had gotten regarding huge compression. Now I'll destroy it cause I'm assembling it myself but the theory will have been strong and, by God thats whats important.