ric-ross1 Posted January 1, 2013 Report Posted January 1, 2013 Alright guys so as tittle says i did a compression test for the hell of it and both had 60 psi, with throttle wide open and i tought is that possible that she starts 2 kick even when cold, idles, smokes just when cold and normal after, runs fine and gets on powerband no boggs nothing just really weird IMO. Happy New Year guys. Quote
ric-ross1 Posted January 1, 2013 Author Report Posted January 1, 2013 ^ yea thats what i tought so i went and did a compression test on my car and read 190 which is where my comp should be on that motor, so i dont get why it reads fine on the car motor but not the banshee, i will get a new tester and see. Thanks sleeper06 Quote
sheerider11 Posted January 1, 2013 Report Posted January 1, 2013 My harbor freight read 60 on everything I tried it on Quote
ric-ross1 Posted January 1, 2013 Author Report Posted January 1, 2013 haha same one i have down stairs, my friend let me borrow it. Quote
rjdgriff Posted January 1, 2013 Report Posted January 1, 2013 How many times did you kick it over? Quote
oldskool Posted January 2, 2013 Report Posted January 2, 2013 Did you test while engine was at normal running temps? Quote
ric-ross1 Posted January 2, 2013 Author Report Posted January 2, 2013 no it was like 50 degrees out and the bike was sitting for couple days. Quote
bansheesandrider Posted January 2, 2013 Report Posted January 2, 2013 Is the threaded part of the tester the same length as your spark plug? Is the check valve right at the end of the tester so every bit of compression goes in the gauge and stays there? It is a screw in gauge and not something you have to hold in the hole by hand? Quote
ric-ross1 Posted January 2, 2013 Author Report Posted January 2, 2013 No the plug is longer then the hose which will read lower( i know), it has a release valve that you press and releases the air but it just gets to 60 psi then i release the air and try again same thing. Quote
camatv Posted January 3, 2013 Report Posted January 3, 2013 borrow a tester from oreillys and try again. 60psi it wouldnt even start from kicking it... Quote
jbooker82 Posted January 4, 2013 Report Posted January 4, 2013 No the plug is longer then the hose which will read lower( i know), it has a release valve that you press and releases the air but it just gets to 60 psi then i release the air and try again same thing. Any volume that is not taken up by the adaptor wich a plug normally occupise will cause a lower reading. Even the long brass screw on adaptors for 14mm long will add 2-3 cc's to the combustion chamber volume. Look at noss machine's web site for their dome chart and see how much of a swing in PSI 3cc's gets you. If you want an accurate gauge it has to have the scrader valve in the tip. If it is in the hose then you thread on an adaptor your adding volume to the combustion chamber. As for it being correct on your car. It is probably going to be more accurate due to the larger displacement. The smaller the motor is the more easly it can be off. Snap On hose with the valve in the tip Generic hose Hollow Adaptor Hose and Adaptor Quote
ric-ross1 Posted January 4, 2013 Author Report Posted January 4, 2013 borrow a tester from oreillys and try again. 60psi it wouldnt even start from kicking it... yea thats what i tought but i didnt know for sure, usually how many psi does it take a banshee to kick start ?? Any volume that is not taken up by the adaptor wich a plug normally occupise will cause a lower reading. Even the long brass screw on adaptors for 14mm long will add 2-3 cc's to the combustion chamber volume. Look at noss machine's web site for their dome chart and see how much of a swing in PSI 3cc's gets you. If you want an accurate gauge it has to have the scrader valve in the tip. If it is in the hose then you thread on an adaptor your adding volume to the combustion chamber. As for it being correct on your car. It is probably going to be more accurate due to the larger displacement. The smaller the motor is the more easly it can be off. Snap On hose with the valve in the tip Generic hose Hollow Adaptor Hose and Adaptor Thanks i prob get to do that this weekend. Quote
Jereme6655 Posted January 4, 2013 Report Posted January 4, 2013 Hell at 90psi your gonna have a hard time kicking it over to start it.....not saying its not possible.....just going to be a struggle. Now 60psi.....I doubt you could even pull start that shit with a truck. Quote
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