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  #466  
Old 11-02-2007, 09:31 AM
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Overheard in YT's classroom.

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grumble grumble.... murder.... grumble... damn homeroom.... grumble

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  #467  
Old 11-02-2007, 12:05 PM
cdigerlando cdigerlando is offline
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Originally Posted by sicksubie View Post
I think that we were seeing knock because boost was coming on too fast and too soon. The bypass valve spring is too stiff which is also why we are only seeing about 10-11" of vacuum. Tom said that it should be around 15-16" and the reason it is not is that we actually have small amounts of boost occurring at idle. I will let him explain it further though.
It sounds like you are still chasing a vacuum leak. If the bypass is working properly it should not be leaking. Do you have any way to plug the bypass line and run the motor at idle only to see if this fixes the vacuum leak?

Boost comming on quick is the wonderful thing about superchargers. I bet what is happening is the cams are allowing the supercharger to work much more efficiently, causing your boost to go up throughout the rev curve. I think you may need to do some more tuning with this motor. I'm glad you are bringing this up, as this will be an issue for all of us to deal with.
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  #468  
Old 11-02-2007, 12:12 PM
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His motor isn't even built yet though and he won't be running a stage III set up......
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  #469  
Old 11-02-2007, 12:15 PM
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Quote:
Originally Posted by cdigerlando View Post
It sounds like you are still chasing a vacuum leak. If the bypass is working properly it should not be leaking. Do you have any way to plug the bypass line and run the motor at idle only to see if this fixes the vacuum leak?

Boost comming on quick is the wonderful thing about superchargers. I bet what is happening is the cams are allowing the supercharger to work much more efficiently, causing your boost to go up throughout the rev curve. I think you may need to do some more tuning with this motor. I'm glad you are bringing this up, as this will be an issue for all of us to deal with.
There is NO vacuum leak and I am 150% sure of that. I took the belt off the bower and the car idled beautifully. You are right about the beauty of the S/C being early boost. That is great but not when your software does not take that into consideration.
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  #470  
Old 11-03-2007, 07:40 AM
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I got to thinking last night, I don't think the cams will cause more boost. In fact they should reduce the boost since they will "consume" air faster. Hard to tell though. Wasn't the tune done on a 9 lb. pully? If this was the case, this might be the problem with your tune.
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  #471  
Old 11-03-2007, 08:48 AM
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i was going to say that but I figured you would realize what you were saying. I am buying a rom reader/writer/eraser in the near future and I have a flashable chip for it. Using that with my g-tech I will try my best to get a better tune on the ol girl

Tom
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  #472  
Old 11-07-2007, 01:18 PM
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Originally Posted by TomsSVX View Post
i was going to say that but I figured you would realize what you were saying. I am buying a rom reader/writer/eraser in the near future and I have a flashable chip for it. Using that with my g-tech I will try my best to get a better tune on the ol girl

Tom
How much does one of those cost?
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  #473  
Old 11-07-2007, 02:38 PM
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probably gonna cost close to $1k for the hardware I may have a co-sponsor for it but I need to level out the order first

Tom
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  #474  
Old 11-07-2007, 03:16 PM
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probably gonna cost close to $1k for the hardware I may have a co-sponsor for it but I need to level out the order first

Tom
That's a good price.
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  #475  
Old 11-07-2007, 03:21 PM
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Got my heads back from the machine shop. They look nice with the pretty new valves. Got the block back, but had to return it to have some grooves cut in the semi decking to allow some better coolant flow, since the inserts extend into the water passages. There is some room between the gasket and the bottom, but I want more room for sufficient flow. Also he needs to cut rings on the last three of my pistons. Hopefully he will finish by the end of the week so I can start to slowly assemble everything. I also received the cometic head gaskets and other subaru motor parts. I'll take pics as I progress through the assembly.
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  #476  
Old 03-01-2012, 02:41 PM
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Re: Engine Build Progress and Questions

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Originally Posted by TomsSVX View Post
we could have even called you Bill...

Tom
THIS NEVER GETS OLD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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The first SuperCharged SVX,
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the first equal length headers,
the first phenolic spacers,
the first Class Glass fiberglass hood,
the first with 4, 4.44s in his driveway


Fiberglass Hood thread
My locker
4.44 Swap link
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  #477  
Old 03-01-2012, 03:22 PM
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Re: Engine Build Progress and Questions

and you dig up a thread from 2007 to abuse me with?
Bill
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  #478  
Old 03-01-2012, 03:54 PM
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Re: Engine Build Progress and Questions

I have been pouring over engine build threads all day long.


At least THIS^ part was fun!
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The first SuperCharged SVX,
the first 4.44 gears,
the first equal length headers,
the first phenolic spacers,
the first Class Glass fiberglass hood,
the first with 4, 4.44s in his driveway


Fiberglass Hood thread
My locker
4.44 Swap link
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  #479  
Old 03-01-2012, 04:20 PM
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Re: Engine Build Progress and Questions

Ive been doing some research as well. Where the heck can I get parts from anymore?? I need pistons,cams,rods..possibly valves...AHHH!
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Rebuilt P/S pump info... http://www.subaru-svx.net/forum/showthread.php?t=50918

If your car wont start info... http://www.subaru-svx.net/forum/show...ighlight=click
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  #480  
Old 07-21-2016, 01:42 PM
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Re: Engine Build Progress and Questions

Reviving a thread from the dead! I need to get a hold of LAN. Building an EG33 for boost .


LAN if you see this I sent you an email on 7/21/16. I need to know if you still have some engine goodies on hand.

-Sam
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