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I started my boat yesterday and it backfired thru the gasket on my tunnel ram where the top plate is connected to the dual carbs. My question is why did it backfire thru there and not come out the carbs? Did I just blow out the gasket or is this normal?
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I started my boat yesterday and it backfired thru the gasket on my tunnel ram where the top plate is connected to the dual carbs. My question is why did it backfire thru there and not come out the carbs? Did I just blow out the gasket or is this normal?
i've seen alot of tunnel rams warp in this area and constantly blow the gasket
there. have the two resurfaced and use a softlead type gasket and it cures the problem.just my 2.
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The path of least resistance. It is possible the butterflys were closed and the explosion closed them even tighter, so the exploding gases found the easiest way out...........If you run power valves, change them..........MP
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So what would have happened if those gaskets where in good shape where would the explosone (backfire) have gone?
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So what would have happened if those gaskets where in good shape where would the explosone (backfire) have gone?
the carbs, if thats the path of least resistance.if it backfired that bad i would follow everyone's advise and change all your power valves.you can buy a kit that prevents p/valve blow out with a backfire from summit racing or jegs.
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The path of least resistance. It is possible the butterflys were closed and the explosion closed them even tighter, so the exploding gases found the easiest way out...........If you run power valves, change them..........MP
good answer ...
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i've seen alot of tunnel rams warp in this area and constantly blow the gasket
there. have the two resurfaced and use a softlead type gasket and it cures the problem.just my 2.
another good answer ...
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the carbs, if thats the path of least resistance.if it backfired that bad i would follow everyone's advise and change all your power valves.you can buy a kit that prevents p/valve blow out with a backfire from summit racing or jegs.
man you guys are too quick ... good answer #3
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As always thanks for the answers. jim
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Are blower motors the only ones benifit from blocking off the power valves? or is this not a good thing to do?
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Are blower motors the only ones benifit from blocking off the power valves? or is this not a good thing to do?
I TRIED IT ON A TUNNEL RAM SET-UP ONCE AND IT LEFT A BAD HOLE IN THE ACCELERATION.TOOK THE PLUGS OUT AND REINSTALLED THE VALVES AND HOLE WENT AWAY. SO IN MY EXPERIENCE THEY DON'T WORK WELL IN STANDARD INDUCTION MOTORS.
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Jim, whats up?. haven't talked at ya in a while. Are you going out to CFW on NYD?.
Moose
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Moose, Do You Still Have A Rogers?
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Nope, sold the Rogers and got a TP Stealth. The tunnel is alot easier on my back :)
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Hey Moose: Yes I am going to go if the weather is somewhat good. Tognottis are out of the tunnel ram gaskets and they won't be in for a week. Looking for a store around sacramento that has them in stock. Do you know of any store that would carry them around where we live?
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Jim, Give Rex Hutchison a call, they might have what you need. If that doesn't work out you could allways try Summit. I always seem to get my parts in two days.
Hope to see you at CFW. I'll be in a 28' Arctic Fox fifth wheel trailer, stop by and say hi.
Rex Hutchison 483-9563
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ok thanks.. hope to see you there.
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Anytime you remove power valves you must rejet. They help save fuel crusing. Budlight
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Anytime you remove power valves you must rejet. They help save fuel crusing. Budlight
You can also change the pump size (50cc) the pump nozzle sizes, and the pump cam profile.The power valve(s) is for "driveability". The PV adds additional fuel during low vacuum when the butterflys allow all that air in when you stab it.(primary PV is still working even though you've opened the secondary butterflys).W/o PV, The acc pump dumps some fuel, but seldom enough for a smooth transistion into WOT. If you eliminate the PVs you must compensate for them some how,or pay the price of a bog/stumble into the secondaries. Contrary to popular belief, you should not have a tremendous surge of power when the secondaries open, just a smooth transistion to WOT. If you feel the sudden serge of power it means you've driven through a bog and the serge is the recovery.........MP
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So what should I do for the best performance?
Put power valve plugs in and rejet with a 50cc pump or
Put in power valves and be done with it?
Again thanks for the replys.