Future Donating Members 116 Member For: 13y 24d Gender: Male Location: Brisbane Posted 12/04/16 10:32 AM Share Posted 12/04/16 10:32 AM Hi All, I can't find much around the forums regarding where compression in each cylinder should be with our motors. I currently have a bf typhoon 07 motor and have just had compression tests done and was informed all cylinders are between 180-185. My reason to the test is that my breather hose on top of motor slowly comes off when I am boosting hard meaning potentially to much pressure in the head. What could be causing the issue with the breather hose? (I have replaced the clamp) Is the compression good? What should I be expecting? Thank you in advance for any help. Sent from my SM-G925I using Tapatalk Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 10y 4m 9d Gender: Male Location: Brisbane Posted 12/04/16 10:37 AM Share Posted 12/04/16 10:37 AM are we talking the breather from the rocker cover to the intake? is the spring clamp still on the rocker cover end? Link to comment Share on other sites More sharing options...
Future Donating Members 116 Member For: 13y 24d Gender: Male Location: Brisbane Posted 12/04/16 11:59 AM Author Share Posted 12/04/16 11:59 AM Yea mate and I have replaced the clamp at the rocker cover end. Sent from my SM-G925I using Tapatalk Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,751 Member For: 12y 8m 8d Posted 12/04/16 12:01 PM Share Posted 12/04/16 12:01 PM Comp is good. As long as its equal across cylinders (which it is) I wouldn't be too concerned. I have found if that hose is plumed back into the intake track(which it is from factory) it will push off when you shut the throttle. This is even worse if you have blocked your blow off valve. I was watching my dipstick lift out on the dyno when the throttle was chopped quickly. Removed the hose from the intake and no more lift. So I fitted a catch can lol 1 Link to comment Share on other sites More sharing options...
Future Donating Members 116 Member For: 13y 24d Gender: Male Location: Brisbane Posted 12/04/16 12:09 PM Author Share Posted 12/04/16 12:09 PM Thanks Gaz, Mine goes to turbo side airbox and I am using the factory BOV I have been thinking of an oil catch can, did this remove the issue entirely? and should I look for any particular oil catch cans? Cheers Sent from my SM-G925I using Tapatalk Link to comment Share on other sites More sharing options...
gaz097 Bronze Donating Members 1,751 Member For: 12y 8m 8d Posted 12/04/16 12:27 PM Share Posted 12/04/16 12:27 PM Ahh I used a small hose clamp as well to secure it on lol. Need to replace it at the moment as its split. And I am not the person to talk to about catch cans as I'm using a catch bottle. And by bottle I mean Gatorade bottle haha 4 Link to comment Share on other sites More sharing options...
Future Donating Members 116 Member For: 13y 24d Gender: Male Location: Brisbane Posted 12/04/16 12:34 PM Author Share Posted 12/04/16 12:34 PM Haha thanks mate. Hopefully some others will share there knowledge Sent from my SM-G925I using Tapatalk Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 15y 9m 27d Gender: Male Location: Adelaide Posted 12/04/16 01:22 PM Share Posted 12/04/16 01:22 PM The highest ive seen is 170psi across all 6 on a fresh F6 engine typical is 160-165psi Link to comment Share on other sites More sharing options...
Future Donating Members 116 Member For: 13y 24d Gender: Male Location: Brisbane Posted 12/04/16 01:34 PM Author Share Posted 12/04/16 01:34 PM What could cause higher compression? Sent from my SM-G925I using Tapatalk Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 11y 10m 25d Gender: Male Location: Central Coast Posted 12/04/16 02:14 PM Share Posted 12/04/16 02:14 PM Could be poor gauge reading Or could be oil in the cylinder. Ive seen that give very high readings Link to comment Share on other sites More sharing options...
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