whats your compression?

[blasterman87]

whats everyones compression on there blastys and whats the maximum compression before you need diffrent fuel and something starts breaking?? such as, i have 145 compression so i should use** for fuel?

 

[rz350guy]

no-lead premium 93 or 94 octane that is a good comp. number for an air cooled motor

 

[blasterfreek30]

heres a good guide for milling the head,

thanx regal
Question: How Much do I mill my head?

Answer:
Base UCCR 9.84:1 = 135 psi = 22.06 cc's
-.010" off = 10.20:1 = 139 psi = 21.20 cc's
-.020" off = 10.58:1 = 144 psi = 20.35 cc's
-.030" off = 11:10:1 = 150 psi = 19.49 cc's
-.040" off = 11.47:1 = 156 psi = 18.65 cc's
-.050" off = 11.98:1 = 162 psi = 17.77 cc's

Question: If I mill my head, will it require me to run a higher octane gas?

Answer: Yes, Milling the head raises the compression. The more compression you have, the higher octane gas you will need to run. Anything over .035" will require race gas. .035" and below you'll be safe with 92-94 Octane Gas.

 

[245stroker]

I'm running 185 in mine. 110 octane fuel

 

[blasterman87]

ok so i have 145 comp already so the most i can mill off is .010? and still use 93

 

[rz350guy]

it depends on what else you have done, that is not stock so what did you modify to get to 145

 

[coreyownz]

if you have the timing advance your done.. i think the most you can mill and run 93 is like .35 which is what i have

 

[blasterman87]

yeah i have 145 compression and timing advance