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yeah I’ve talked to numerous builders and they say there is definitely benefits to venting this engine, especially if you’ve added ci’s over stock. Ive always liked the guys at Trask so when they came out with their vent cover I decided to give it a go, it is a very nice billet cover. Others have said they could drill and tap the stock cover and change the closed off stock gasket and put a one way valve, I guess they is true but for me, I don’t mind paying for a product that guys spent a lot of time, effort and knowledge into manufacturing and testing so that’s why i bought it from them.
yeah, we know..chump change after buying a half dozen set of mufflers just too find the right one man you and I are opposite ends of the pendulum but I'm just busting your chops since I take it on the chin for leaving my bike stock
yeah, we know..chump change after buying a half dozen set of mufflers just too find the right one man you and I are opposite ends of the pendulum but I'm just busting your chops since I take it on the chin for leaving my bike stock
LoL, thats right! If I was old and dusty like you I might hang on to my money a little tighter nah I doubt it, I spend my money like it has an expiration, I know Ive said it before but I have no intention of leaving this world with a truckload of cash in the bank for someone else to enjoy, I like living it up while IM alive and Im sure aftermarket companies like Trask Fn love guys like me! LoL
yeah Ive talked to numerous builders and they say there is definitely benefits to venting this engine, especially if youve added cis over stock. Ive always liked the guys at Trask so when they came out with their vent cover I decided to give it a go, it is a very nice billet cover. Others have said they could drill and tap the stock cover and change the closed off stock gasket and put a one way valve, I guess they is true but for me, I dont mind paying for a product that guys spent a lot of time, effort and knowledge into manufacturing and testing so thats why i bought it from them.
Does this have any relation to the head breathers?
Does this have any relation to the head breathers?
it serves the same purpose as the head breathers its just in a different location and should help prevent the stock head breathers from puking oil back into the throttle body to crust up the top of your pistons.
it serves the same purpose as the head breathers it’s just in a different location and should help prevent the stock head breathers from puking oil back into the throttle body to crust up the top of your pistons.
Oil pressure is regulated through a pressure relief valve, not sure how your oil pressure became sky high. Air compresses , not the case with liquids.
Not a physicist, but when I took the kink out of the hose, the oil pressure returned to normal. Would excess crankcase pressure from not being able to vent make oil pressure high?
These breather bolts are used for mounting the Harley Ventilator AC backing plate. Notice on the threaded side the hole is smaller, just at the end actually. Anybody think to open up the smaller end, drill it out for better air flow? A lot of folks keep these in place and use them as part of an external breather system. Especially in a big bore application, do the head breathers pass more air and would they benefit from opening up the hole in these bolts?
I know this is an old thread, but I was wondering if you drilled out the breather bolts and if you felt it freed up any power letting the heads breathe better? I had never really thought about this until I saw the Alloy Art air cleaner with breather bolts and external breather that are bores out to twice the diameter of stock. I called them to ask a few questions about the air cleaner and they said the bored out breathers really help.
I know this is an old thread, but I was wondering if you drilled out the breather bolts and if you felt it freed up any power letting the heads breathe better? I had never really thought about this until I saw the Alloy Art air cleaner with breather bolts and external breather that are bores out to twice the diameter of stock. I called them to ask a few questions about the air cleaner and they said the bored out breathers really help.
I did drill the inlet hole to a larger size. I don't think there's enough constant or pulse air flow to make any difference, but maybe the thinking of the original design is to let enough air through to breathe but block as much as possible the oil mist that can get in there. I never really had oil in the filter area of my AC, just a bit behind the throttle plate, probably from valve seals and piston rings letting it by, I think engine braking plays a part in doing this along with ring seal. My 131 has less oil getting into the intake, better ring seal and using less engine braking probably helps. I did do a Trask copy of the CC vent to my trans cover with a Toyota PCV valve, soon to be changed to a reed valve though.
I did drill the inlet hole to a larger size. I don't think there's enough constant or pulse air flow to make any difference, but maybe the thinking of the original design is to let enough air through to breathe but block as much as possible the oil mist that can get in there. I never really had oil in the filter area of my AC, just a bit behind the throttle plate, probably from valve seals and piston rings letting it by, I think engine braking plays a part in doing this along with ring seal. My 131 has less oil getting into the intake, better ring seal and using less engine braking probably helps. I did do a Trask copy of the CC vent to my trans cover with a Toyota PCV valve, soon to be changed to a reed valve though.
I did a home made version of Trask tranny cover. I am not concerned about oils being lost thru breather bolts - more about if the larger bore bolts would just free up any restriction and let the heads flow a little better.
I'd watch for those hoses to get clogged up with the goop when it's sitting running them uphill like that. That stuff will harden and cause a blockage. Seen it happen. You'll know it tho when you start having oil leaks from high crankcase pressure.
The oil tank is no place I'd be venting either. Too much oil movement to get picked up and spewed out.
If you want better crankcase pressure relief use a better one way valve that doesn't allow air back in before they close. Every other air pump engine were both pistons go up and down at the same time or nearly the same use reed valves. I use inline valves in the hoses just off the breather bolts in my TC but leave the housing and filters for the butterfly valves in the rocker boxes. I can run my oil level on the full mark and not have a drop of oil out the hose under the bike.
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man you and I are opposite ends of the pendulum but I'm just busting your chops since I take it on the chin for leaving my bike stock
nah I doubt it, I spend my money like it has an expiration, I know Ive said it before but I have no intention of leaving this world with a truckload of cash in the bank for someone else to enjoy, I like living it up while IM alive and Im sure aftermarket companies like Trask Fn love guys like me! LoL 
