Brass Restrictor in Wastegate Hose? And a Leak!
Brass Restrictor in Wastegate Hose? And a Leak!
When removing my factory wastegate hoses to install a manual boost controller, I found a small brass restrictor in the line from the hard pipe before the "T" connecting to the actuator.
Is this a factory installed component or would you have to venture a guess that it was added by the person who owned the car before me (if only for 3000 miles)?
The reason I ask is that once I removed the boost controller to go back to the stock setup temporarily, and reinstalled the factory hoses including that little restrictor, my car is now spiking at 24 PSI and tapering to 22. I'm totally at a loss for words as to why.
Even with the car making such boost, there is a really loud boost leak, BUT ONLY ABOVE 22 PSI. My opinion is that the little restrictor is creating such an additional amount of boost that once it is no longer able to flow any more air, it is creating a leak in that vacuum line.
Any thoughts?
Is this a factory installed component or would you have to venture a guess that it was added by the person who owned the car before me (if only for 3000 miles)?
The reason I ask is that once I removed the boost controller to go back to the stock setup temporarily, and reinstalled the factory hoses including that little restrictor, my car is now spiking at 24 PSI and tapering to 22. I'm totally at a loss for words as to why.
Even with the car making such boost, there is a really loud boost leak, BUT ONLY ABOVE 22 PSI. My opinion is that the little restrictor is creating such an additional amount of boost that once it is no longer able to flow any more air, it is creating a leak in that vacuum line.
Any thoughts?
there are so many threads on this topic...the loud boost leak you hear is probably the factory plastic bov (although not sure if the 05 come with the mr dv)...as for the restrictor pill...just search on here you'll find all the answers you need...oh and make sure your mbc did not come with 6mm lines...the factory wastegate calls for 4mm which you can buy at any car part store for 3 bucks...good luck
I didn't mean to create a useless thread nor any frustration for anyone!
I'm using a prototype Forge valve that we will be releasing soon for the Evo's as well as many other applications, so I don't think it's the valve. It's been working fine for over 2 months.
For the vacuum lines, I'm actually using 3mm Samco Silicone lines, so I don't think that's the problem either.
Again, I didn't mean to repost, and I fully understand the difficulty in diagnosing a car problem over the internet, so I appologize.
I appreciate your insight though.
I'm using a prototype Forge valve that we will be releasing soon for the Evo's as well as many other applications, so I don't think it's the valve. It's been working fine for over 2 months.
For the vacuum lines, I'm actually using 3mm Samco Silicone lines, so I don't think that's the problem either.
Again, I didn't mean to repost, and I fully understand the difficulty in diagnosing a car problem over the internet, so I appologize.
I appreciate your insight though.
Ok, well, after doing some more research, I realized what I had done!
I wasn't aware of the exsistence of the second restictor in the line connecting to the solenoid, and that removing it creates the severe spiking I was experiencing.
Now I see!
My appologies everyone!
I wasn't aware of the exsistence of the second restictor in the line connecting to the solenoid, and that removing it creates the severe spiking I was experiencing.
Now I see!
My appologies everyone!
Well, if you can give me a little bit more information concerning your exact setup and how the valve is tuned, I may be able convince you to keep it!
Let me know!
Let me know!
I already sold mine.
When you say the valve has been working great for 2 months you mean it has good compressor surge and makes a **** load of noises.
I tried to talk to you guys about the problem but got blown off (no pun intended) as "we don't have any problems with it". The original valve piston made noise and the replacement piston couldn't flow any air because it was so big. I even had the 2nd design piston CNC'd to remove the ribbing to flow more air but that only helped the problem. The first piston was the best version but it need a minor tweak to stop the hideous noise when installed as recommended. Problem was I could not machine that out so I gave up. Loved the design, k.i.s.s. Probably still better then a SSQV though.
When you say the valve has been working great for 2 months you mean it has good compressor surge and makes a **** load of noises.
I tried to talk to you guys about the problem but got blown off (no pun intended) as "we don't have any problems with it". The original valve piston made noise and the replacement piston couldn't flow any air because it was so big. I even had the 2nd design piston CNC'd to remove the ribbing to flow more air but that only helped the problem. The first piston was the best version but it need a minor tweak to stop the hideous noise when installed as recommended. Problem was I could not machine that out so I gave up. Loved the design, k.i.s.s. Probably still better then a SSQV though.
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Originally Posted by timzcat
I already sold mine.
When you say the valve has been working great for 2 months you mean it has good compressor surge and makes a **** load of noises.
When you say the valve has been working great for 2 months you mean it has good compressor surge and makes a **** load of noises.
It may be funny "as hell" , but it's completely untrue! 
I said I was running "a prototype Forge valve that we will be releasing soon", meaning it's an All-New design, engineered to eliminate some of the problems we are already aware of with the previous designs. I'll get into the specifics of this new valve in a new thread closer to the release of the product.
I have never once said that our Evo Recirc. valves were without their flaws, in fact, I have openly admitted to the part-throttle fluttering concern, the disadvantage of the "spring/shim" tuning method, as well as many other things. This new valve has conquered all of those issues.
I can't personally comment on you being "blown-off", as this occurance was never something I witnessed from any of my co-workers, nor was I have made privy to any complaints concerning a situation like this. Had I been aware of it, it would have been rectified immediately.
The original piston inherently made noise because of it's design, no questions about it. Air passing over a sharply machined surface is bound to create a sound.
The second piston design was to eliminate the noise concern as well as to partially eliminate some of the fluttering issues, which it partially did. The larger body of the second piston design only had little to do with airflow. The airflow is limited more by the travel of the piston than anything else, yet, I'll agree, it was a far from optimal solution.
Machining the piston yourself isn't something I can condone as it concequently would have voided the "No-Hassle Warranty" we offer on all of our products. If you're not happy with, or there is a problem, it can be return for a replacement or a full refund. Furthermore, our engineers spend countless hours in an in-house design studio working over the best valve development ideas. Their hard work has made us a premier manufacturer of billet performance components.
It's impossible to guarantee that all products will have the same results on every application, so I can only appologize that you didn't have any luck with the valve, but we would have gladly replaced the valve with a complimentary component or refunded your money without question.
I'm not one for arguing over the internet, because I find it very unbecoming, but I'm personally offended that my own words are construed into a completely untrue statement, by a moderator no less, whose sole intent is to slander my company and our products.
I can't help but feel the need to appologize for your frustration and any trouble you encountered in trying to solve the concerns you had, but I also feel the need to defend the hard work that has gone in to developing quality products, which is ever an ongoing process. Particularly in the automotive market.
We're working on creating new products all of the time, and as more information becomes available, I will happily keep you all informed. That's why I'm here. To help, not to be mocked for no reason.
I said I was running "a prototype Forge valve that we will be releasing soon", meaning it's an All-New design, engineered to eliminate some of the problems we are already aware of with the previous designs. I'll get into the specifics of this new valve in a new thread closer to the release of the product.
I have never once said that our Evo Recirc. valves were without their flaws, in fact, I have openly admitted to the part-throttle fluttering concern, the disadvantage of the "spring/shim" tuning method, as well as many other things. This new valve has conquered all of those issues.
I can't personally comment on you being "blown-off", as this occurance was never something I witnessed from any of my co-workers, nor was I have made privy to any complaints concerning a situation like this. Had I been aware of it, it would have been rectified immediately.
The original piston inherently made noise because of it's design, no questions about it. Air passing over a sharply machined surface is bound to create a sound.
The second piston design was to eliminate the noise concern as well as to partially eliminate some of the fluttering issues, which it partially did. The larger body of the second piston design only had little to do with airflow. The airflow is limited more by the travel of the piston than anything else, yet, I'll agree, it was a far from optimal solution.
Machining the piston yourself isn't something I can condone as it concequently would have voided the "No-Hassle Warranty" we offer on all of our products. If you're not happy with, or there is a problem, it can be return for a replacement or a full refund. Furthermore, our engineers spend countless hours in an in-house design studio working over the best valve development ideas. Their hard work has made us a premier manufacturer of billet performance components.
It's impossible to guarantee that all products will have the same results on every application, so I can only appologize that you didn't have any luck with the valve, but we would have gladly replaced the valve with a complimentary component or refunded your money without question.
I'm not one for arguing over the internet, because I find it very unbecoming, but I'm personally offended that my own words are construed into a completely untrue statement, by a moderator no less, whose sole intent is to slander my company and our products.
I can't help but feel the need to appologize for your frustration and any trouble you encountered in trying to solve the concerns you had, but I also feel the need to defend the hard work that has gone in to developing quality products, which is ever an ongoing process. Particularly in the automotive market.
We're working on creating new products all of the time, and as more information becomes available, I will happily keep you all informed. That's why I'm here. To help, not to be mocked for no reason.
Last edited by Mike@Forge; Mar 25, 2005 at 03:27 PM.
Originally Posted by Mike@Forge
Ok, well, after doing some more research, I realized what I had done!
I wasn't aware of the exsistence of the second restictor in the line connecting to the solenoid, and that removing it creates the severe spiking I was experiencing.
Now I see!
My appologies everyone!
I wasn't aware of the exsistence of the second restictor in the line connecting to the solenoid, and that removing it creates the severe spiking I was experiencing.
Now I see!
My appologies everyone!
Allan,
I will surely hit you up for your offer, though I think it's better discussed further over the telephone early next week, if that's ok with you!
PM me with a good time to get in touch with you concerning this and the other things we have previously discussed!
I will surely hit you up for your offer, though I think it's better discussed further over the telephone early next week, if that's ok with you!
PM me with a good time to get in touch with you concerning this and the other things we have previously discussed!
Sorry, I've been out of pocket.
Mike, thus far you seem willing to work with your customers. I'd say that speaks well of Forge and your business ethic. My schedule is ridiculous now, and over the next week, but I intend to contact you next week on what issues I have, along with what your "new" valve has to offer.
Mike, thus far you seem willing to work with your customers. I'd say that speaks well of Forge and your business ethic. My schedule is ridiculous now, and over the next week, but I intend to contact you next week on what issues I have, along with what your "new" valve has to offer.
Guys - BTW - really suprized to hear of your problems with this bov. I have been using the Forge BOV on my evo for a long time and I never had problems with mine back when i had a stock ecu. It sstill continues to provide me service at 667 whp.
No aftermarket bov will work as good as stock as the stock unit have been specifically designed to work hand in hand with the stock maf sensor. However, out of the units I have test driven thus far the forge has been the best of the lot.
Even the "MR" metal valve runs like *** on some evos.
No aftermarket bov will work as good as stock as the stock unit have been specifically designed to work hand in hand with the stock maf sensor. However, out of the units I have test driven thus far the forge has been the best of the lot.
Even the "MR" metal valve runs like *** on some evos.
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