Compression and Pump gas

[chilled]

what is the highest compression a guy would want to run with pump gas?

 

can you get away with 180psi of compression? when should you switch to race gas?

 

 

 

tnx

[Stinger]

Typically it's 155-160psi...anything more requires pump gas.

[greg_banshee]

Typically it's 155-160psi...anything more requires pump gas.

502437[/snapback]

you mean anything more then 155-160psi requires Race Gas.

[CadillacBanshee]

Over 160 has to use higher octane gas. The higher the compression, the higher the octane.

[Ripassbrother]

my compression is 160. Im running 1 gallon Race (110) and 4 gallons super. Does that sound about right?

[dajogejr]

Other factors as well...stock timing?

 

YOu only need to run as much octane as needed so it doens't ping or detonate.

Listen to your motor and look at your plugs, that'll tell you...

[Banshee17Racing]

my compression is 160. Im running 1 gallon Race (110) and 4 gallons super. Does that sound about right?

502572[/snapback]

Yeah, that sounds right. I'd say you're on even on the safe side. Most say 160 psi is the limit for pump gas (93 octane).

[[email protected]]

my compressions 220psi and i run vpc12

[dajogejr]

220 PSI on 18cc domes? check you compression gauge...it's bad...

[Wicked98Shee]

220 PSI on 18cc domes?  check you compression gauge...it's bad...

502768[/snapback]

yea no shit

[00tbanshee]

i tried to run c12 yesterday with 40:1 amsoil my comp. is 130 n it made it run like crap hardly would idle