Is my vacuum hose for WG too long???
10-03-2004, 05:36 PM
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Is my vacuum hose for WG too long???
Here's my setup. The vacuum hose for the wastegate is lined by green. Where it stops near the manifold, there is another tee there that sprouts to the BOV.
Anyways, I have a 7lb spring in there and the boost spikes to 12lbs all the time. I was wondering if my boost spikes are caused by the long hose, or possibly because it tee's to the BOV as well.
Any insight is greatly appreciated.
Anyways, I have a 7lb spring in there and the boost spikes to 12lbs all the time. I was wondering if my boost spikes are caused by the long hose, or possibly because it tee's to the BOV as well.
Any insight is greatly appreciated.
10-03-2004, 07:01 PM
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Re: (99B16Si)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99B16Si »</TD></TR><TR><TD CLASS="quote">too many T's will cause this not the vacuum hose length.</TD></TR></TABLE>
Ok. I just found a capped 1/8" NPT hole in the turbo. I think I am gonna run the wastegate from this and see if it helps. Sound like a plan?
Also -- there is a source that requires vacuum that is damn near the TB on the intake -- should I try tapping there and see if that helps?
Ok. I just found a capped 1/8" NPT hole in the turbo. I think I am gonna run the wastegate from this and see if it helps. Sound like a plan?
Also -- there is a source that requires vacuum that is damn near the TB on the intake -- should I try tapping there and see if that helps?
10-03-2004, 08:20 PM
#5
Re: (Mario BA4)
You'll get lower boost if you use the compressor vac port. Just so you know what to expect. might fix the spiking but I usually do the opposite to fix problems like this.
10-03-2004, 08:44 PM
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Re: (Bailhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch »</TD></TR><TR><TD CLASS="quote">You'll get lower boost if you use the compressor vac port. Just so you know what to expect. might fix the spiking but I usually do the opposite to fix problems like this.</TD></TR></TABLE>
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?
10-03-2004, 11:35 PM
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Re: Is my vacuum hose for WG too long??? (Mario BA4)
I've read in boost controller manuals that the line should not be more than 36 inches. I would keep the line as short as possible to reduce response time.
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10-04-2004, 06:41 AM
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Re: (Mario BA4)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mario BA4 »</TD></TR><TR><TD CLASS="quote">
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?</TD></TR></TABLE>
because the PSI at the turbo compressor will be more than the PSI in the intake manifold from the pressure drop of the intercooler. Try connecting it to the compressor like what everyone else says and see what happens
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?</TD></TR></TABLE>
because the PSI at the turbo compressor will be more than the PSI in the intake manifold from the pressure drop of the intercooler. Try connecting it to the compressor like what everyone else says and see what happens
10-04-2004, 07:18 AM
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Re: (Mario BA4)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mario BA4 »</TD></TR><TR><TD CLASS="quote">
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?</TD></TR></TABLE>
Basically whats being said here about the spiking is that when you "T" lines and run a line from there to your wastegate, your engine needs to fill all those "T"'d lines inorder to build pressure against the wastegate.. What you want to do is find a good vacuum souce(brake booster) and "T" into that and run that to a vacuum block then go to all your vacuum sources from the block include the wastegate.. That way the vacuum block is the exact same pressure as the intake manifold and can move air very quickly.. So the wastegate line will keep close to the same pressure as the intake also..
Please explain what you mean when you say overall boost. I'd rather not have this spiking as it happens all the time every time.
And what would be the 'opposite' to fix problems like this?</TD></TR></TABLE>
Basically whats being said here about the spiking is that when you "T" lines and run a line from there to your wastegate, your engine needs to fill all those "T"'d lines inorder to build pressure against the wastegate.. What you want to do is find a good vacuum souce(brake booster) and "T" into that and run that to a vacuum block then go to all your vacuum sources from the block include the wastegate.. That way the vacuum block is the exact same pressure as the intake manifold and can move air very quickly.. So the wastegate line will keep close to the same pressure as the intake also..
10-04-2004, 10:57 AM
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Re: (tgreaves)
Ok. Cool, I will try the turbo today.
BTW -- the dumptube is open... and there is exhaust carbon build up in it. If this helps for any information on the situation.
BTW -- the dumptube is open... and there is exhaust carbon build up in it. If this helps for any information on the situation.
10-04-2004, 07:35 PM
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Re: (ALL MOTOR LS till 4K)
Perhaps... but I am just outta ideas.
I am gonna remove the screw that allows for minor boost adjustment and see if that'll help.
Probably end up taking it apart tomorrow.
I am gonna remove the screw that allows for minor boost adjustment and see if that'll help.
Probably end up taking it apart tomorrow.
10-05-2004, 01:48 PM
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10-05-2004, 03:05 PM
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Re: (Mario BA4)
Oh man... This is for the other post, but sorry man.
But I guess if I post on this post I'd have to make it on topic, so here goes. (Not that it matters anymore)
From what I've read the deltagates are pretty unreliable. Do you have a friend you could trade wastegates for a day with to see if that's the problem?
But I guess if I post on this post I'd have to make it on topic, so here goes. (Not that it matters anymore)
From what I've read the deltagates are pretty unreliable. Do you have a friend you could trade wastegates for a day with to see if that's the problem?
10-05-2004, 03:12 PM
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Re: (ThePro)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ThePro »</TD></TR><TR><TD CLASS="quote">Oh man... This is for the other post, but sorry man.
But I guess if I post on this post I'd have to make it on topic, so here goes. (Not that it matters anymore)
From what I've read the deltagates are pretty unreliable. Do you have a friend you could trade wastegates for a day with to see if that's the problem?</TD></TR></TABLE>
I was planning on tonight borrowing a TiAL to swap. That plan worked well.
But I guess if I post on this post I'd have to make it on topic, so here goes. (Not that it matters anymore)
From what I've read the deltagates are pretty unreliable. Do you have a friend you could trade wastegates for a day with to see if that's the problem?</TD></TR></TABLE>
I was planning on tonight borrowing a TiAL to swap. That plan worked well.
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