compression test, how many kicks?

[mjstone85]

so, when doing a compression test on the blaster. how many times do you kick it over to read your compression? after 7 mine reads 145 but after 10 it reads 175 on a good snap-on gauge. what do you all test at?I:I

 

[dburroug]

that is kinda strange....i always thought they should max out after like 3 kicks. I dont really see how it can keep building compression. Are you doing it on a cold cylinder? holding the throttle wide open?

 

[mjstone85]

cold cylinder with throttle closed.

 

[dburroug]

i think there is your problem...your tryin to suck enough air to fill your cylinder all the way with the throttle barely cracked...retest it with the throttle wide open and i bet you hit 170 within 3-4 kicks

 

[mjstone85]

well i'll give it another try tomorrow. (my compression tester is at work.)

 

[mystahagy]

cold motor, hold WOT and kick till it stops increasing. that's your reading, depending on how inaccurate your gauge is.

 

[FLOTEK]

cold motor, hold WOT and kick till it stops increasing. that's your reading, depending on how inaccurate your gauge is.

100% agreed .....

 

[mjstone85]

ok heres what i got....... 178 psi. compression gauge cover is a little worn, gets a lot of use.

 

[peacher213]

Sweet. I wonder what my compression is.

 

[mr_3_0_5]

nice compression.. you may need to look into good gas.

 

[mjstone85]

well i'm running 92 oct and it has not detonated yet. runs real strong too.

 

[skinnto]

im running a stock blaster and i would like to rebuild it before it blows! I hear its much more cost effective and can save you from lots of problems/money in the long run. What is great compression, good, average, below average and not good (rebuild it) I've been riding for about 6 years but it was always someone's machine...not mine (im a good guy and if anything ever broke i'd pay for repairs). I finally got one and this site has helped me more than anything else. Sorry if these are stupid questions~

thx for everyone's help

 

[skinnto]

no one can give any ideas on compression #'s ???? :''(

 

[jlsparky7]

Bad compression. Like wont start bad compression is around 80-90psi and below. My banshee is at 70psi and needs a rebuild, it wont start.

100-110psi is ok compression and 120psi and up is good compression for a stock motor.

You are going to hear all kinds of numbers but from my experience those numbers work. Ive rebuilt a couple blasters and will be rebuilding my banshee soon.

 

[skinnto]

thanks sparky. im gonna check b4 i go this weekend! (noticed your se mich. ME 2) going up by cadilac this friday