BigMatt Posted April 1, 2010 Author Report Posted April 1, 2010 well, will I be ok with +4 because my compression is around 120-125psi I do not have a milled head but do plan on a coolhead with 20cc domes in the near future? I just do not want to have to worrie about hurting my motor but would not mine some more power. should I start with +3 then how do I know if its to retard or advanced? Quote
papa_smurf49319 Posted April 1, 2010 Report Posted April 1, 2010 ya i dont know what 20cc domes will put you at, but yes plus 4 and 120-125 pounds of compression is just fine on 93 oct. You will be fine, if your worried about it just keep an eye on your plugs, make sure there not backing out and look at the porcelin for aluminum specks etc. But you should be just fine on pump. Im running 185 psi compression and plus 7 on 110 octane! Cody Quote
BigMatt Posted April 1, 2010 Author Report Posted April 1, 2010 ya i dont know what 20cc domes will put you at, but yes plus 4 and 120-125 pounds of compression is just fine on 93 oct. You will be fine, if your worried about it just keep an eye on your plugs, make sure there not backing out and look at the porcelin for aluminum specks etc. But you should be just fine on pump. Im running 185 psi compression and plus 7 on 110 octane! can you explain what you meant buy this porcelin for aluminum specks etc, sorry banshees are still some what new to me, thanks... if detonation happens is the only way to tell by plugs backing out. Cody Quote
papa_smurf49319 Posted April 1, 2010 Report Posted April 1, 2010 if you are getting some severe detonation, you will usually see aluminum specks on the porcelin of the plug, or little tiny black spots sometimes. I wouldnt worry about it plus 4 is plenty save with the compression your running. Go hop on that thing and ride, your going to be suprised at what it does for ya! Cody Quote
BigMatt Posted April 1, 2010 Author Report Posted April 1, 2010 really I was not sure I'd notic more power or not, but its a cheap mode thanks for clearing that up, also I have a stock head with 125psi is that good I'v heard anything lower than 110 needs rebuilt but before I bought it the guy said he put a freash wesco top end in it, also if you check compression when the motor is cold will you get a higher or lower reading? I was thinking higher because when the motor gets warm metal expanse, but I dont know, also as for sea level I live in Michigan Quote
papa_smurf49319 Posted April 1, 2010 Report Posted April 1, 2010 ya 125psi is a good reading, im in michigan also and at 852ft i think, and i had 125 to 130 psi on a stock rebuild back when. Quote
BigMatt Posted April 1, 2010 Author Report Posted April 1, 2010 ya 125psi is a good reading, im in michigan also and at 852ft i think, and i had 125 to 130 psi on a stock rebuild back when. thanks alot for all your help man! Quote
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