who makes aboost controller with really big ports?
#1
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who makes aboost controller with really big ports?
I've tried my ebay boost controller with larger barbs and I guess the internals don't flow enough and it overboosts. Until then, I'm back to running 11.5psi, which I should also note turns out to be extremely fast.
I need a boost controller with at a minimum 1/4" porting throughout.
I need a boost controller with at a minimum 1/4" porting throughout.
#11
You can put passages as large as you'd like on there, the actual pintle/ball is not all that big. The air in the actual controller goes though a very small gap.
I have the standard McMaster "dodge style" (like the FM one) MBC, then another one I made out of the next size up valve. I was pretty sure it would help (it uses a pintle, not a ball).. But it doesn't seem to work any better or any worse.
I'll see if I can find some pics or something. With your external wastegate I'm surprised you're having problems. It's not a question of flow, unless you're getting spiking, it's a question of the leak rate of the wastegate/MBC.
I spent a while tuning the size of that hole, and it works well after messing with it.
I have the standard McMaster "dodge style" (like the FM one) MBC, then another one I made out of the next size up valve. I was pretty sure it would help (it uses a pintle, not a ball).. But it doesn't seem to work any better or any worse.
I'll see if I can find some pics or something. With your external wastegate I'm surprised you're having problems. It's not a question of flow, unless you're getting spiking, it's a question of the leak rate of the wastegate/MBC.
I spent a while tuning the size of that hole, and it works well after messing with it.
#12
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Well, like I said earlier the 1/8" caused overboosting, so I guess its not filling up the chamber fast enough. Its doing the same thing when fed through the top port I suppose. I need a valve that dumps air faster.
#13
You DO know how those work, right? There's a leak in the line, somewhere. One is included in the MBC itself, generally.
You need to find this leak and make it smaller. A single puff from your lungs would EASILY fill the wategate, so something else is going on. If you want to try to figure it out, I'd be happy to.
First thing is "overboosting" verses boost-spiking, which are you seeing?
You need to find this leak and make it smaller. A single puff from your lungs would EASILY fill the wategate, so something else is going on. If you want to try to figure it out, I'd be happy to.
First thing is "overboosting" verses boost-spiking, which are you seeing?
#14
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Overboost from 11psi to 18psi at 5k rpm. I can take the boost controller out of the lines and it holds perfectly.
Its weird though because I should see no problem dumping the pressure because that goes through the bottom port. The engineer at TiAL told me to swap lto larger lines and that the reduction in the smaller lines can do weird things like this on the boost controller port.
Its weird though because I should see no problem dumping the pressure because that goes through the bottom port. The engineer at TiAL told me to swap lto larger lines and that the reduction in the smaller lines can do weird things like this on the boost controller port.
#16
I'd look for that leak. Think about it, if there was NO leak, you'd hit boost, the valve would open, pressurize the wategate, it would open, the valve would close, and that pressure would stay there, your wastegate would never shut. So, they put a small vent in. The vent might be oversized for the flow of the MBC.
Anyway, check out McMaster, they have lots of valves.
Anyway, check out McMaster, they have lots of valves.
#18
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I've got the Greddy Profec B and I've never had overboost problems with it.
I picked it up on craigslist after watching for a few weeks for $100. It really has a large solenoid, so I'm sure flow isn't a problem.
I picked it up on craigslist after watching for a few weeks for $100. It really has a large solenoid, so I'm sure flow isn't a problem.
#20
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I want to use an MBC. I like to run the car on WG/11psi on the track for now. I also really like to play with 18psi on the street, or possibly the track if I feel the need to kill myself quickly or feel like hitting 150mph.
Sure I could put a stiffer spring in there, but I'd like to also have the adjustability.