manifold gasket with supercharger
Thread Starter
Drifting
Joined: Dec 2001
Posts: 1,313
Likes: 1
From: providence ut
manifold gasket with supercharger
Does anybody make a manifold to block manifold gasket that maybe clips to the block so it won't blow out every time I boost or something to that effect, and yes I know I have a blowby problem but to some extent all blown motors have this problem. thanks
Racer
Joined: Jan 2000
Posts: 302
Likes: 1
From: VA
Re: manifold gasket with supercharger (lead foot 85 vet)
Never had a problem with blowing the gasket out even at 21 PSI are you shure the machined surfaces are machined at the same angles or some times when the block is decked the valley surfaces are too close & don't allow the manifold surfaces to compress enough to seal properly
Just some thoughts ...
JJ
Just some thoughts ...
JJ
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Re: manifold gasket with supercharger (lead foot 85 vet)
How does boost blow out a intake gasket? The manifold bolts go through the intake gasket and it is also clamped between the head and intake. Are you talking about the end gaskets? If you are using gaskets forget them and use a bead of silicon.
Thread Starter
Drifting
Joined: Dec 2001
Posts: 1,313
Likes: 1
From: providence ut
Re: manifold gasket with supercharger (Twinnie)
yes I'm talking about the end rail gaskets, My post read manifold to block not manifold to head...........and it was rtd silicone that I used.........I just tried again using some super silicone in a pressurized can and am keeping my fingers crossed...........by the way I thought I had used plenty of silicone the first time, but after disassembling it again it appears some spots weren't compressed and I had created my own problem.......I haven't ran it yet but hopefully its going to work..........thanks for the input....
ps some one should invent a "T" gasket that can't be blown out
ps some one should invent a "T" gasket that can't be blown out
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Re: manifold gasket with supercharger (lead foot 85 vet)
You must have alot of blowby or the motor is sealed up tight. Even supercharged I run a PCV valve on one valve cover and a open line from my air cleaner to the other valve cover. Any pressure from blowby should vent out both valve covers and never blow out the intake to block silicon gasket.
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Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: manifold gasket with supercharger (lead foot 85 vet)
Probably blowing oil out your dipstick also? Sounds like your motor isn't vented well enough. You did remove the PCV right? Run a breather filter and 5/8" hose from each valve cover to the SC air intake to free it up.
Also- was your block decked or heads milled, without cutting the intake also so it seats properly?
Also- was your block decked or heads milled, without cutting the intake also so it seats properly?
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: manifold gasket with supercharger (norvalwilhelm)
supercharged I run a PCV valve on one valve cover and a open line from my air cleaner to the other
When vacuum is low (open throttle) or non-existent (under boost) that PCV is wide open and your boost is leaking into the crankcase! Of course it's fighting against any blowby pressure in there also, but pretty much winds up blowing out the other side valve cover. Especially if your fresh air side is connected to the SC air filter- which is applying vacuum! You're making it go the wrong way...
Anytime you go with positive manifold pressure you must seal off the PCV connection at the manifold, remove the valve, and use crankcase breathers. To be environmentally friendly, run breathers with hoses to the SC inlet, which also provides a nice source of vacuum to reduce any blowby pressure buildup in the crankcase.
[Modified by gcrouse, 7:29 PM 6/15/2002]
Thread Starter
Drifting
Joined: Dec 2001
Posts: 1,313
Likes: 1
From: providence ut
Re: manifold gasket with supercharger (gcrouse)
no blow by coming out anywere.......vent hoses are dry.......the latest silicone is holding.......now I'm dealing with the heat created by the intercooler seating in front of the rad......it's not to bad about 210 to 220 with ac on running down the freeway and 195 in town.....I'm going to try some water wetter and distilled water but I can live with the increased temps I just don't like it, the intercooker install has raised my temps about 15 to 20 degrees and if I boost way more. thanks for the imput ...........leadfoot
p.s. I have both fans wired on all the time.
p.s. I have both fans wired on all the time.
Pro
Joined: Jun 2002
Posts: 705
Likes: 0
From: Dearborn mi.
Re: manifold gasket with supercharger (lead foot 85 vet)
Good engines do not have blowby. Blowby comes from pressurizing the lower end. I suggest a leak down test to see where you are. That would check intake and exhaust valves and ring sealing. Also manifold problems. The test should be near 100% if not a tear down would be necessary to eliminate your problems that a leak down would detect.
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: manifold gasket with supercharger (wallyknoch)
Good engines do not have blowby
