Can't get over 2.0BAR...
05-14-2006, 07:28 PM
#1
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Can't get over 2.0BAR...
Hey all, I'm now running EFI and can't seem to get past 2.05BAR.
I am running a 1.9BAR spring (from Ben Swann) with a MBC.
I have all three lines still going to the WGFV, but I disconnected the outlet that went to the wastegate and plugged it. I then plumbed in a new line off the manifold to the inlet of my MBC and the MBC outlet is going to the wastegate.
I tried first with a manual boost controller and was only able to go from 1.82 to about 1.89-1.9 even with the MBC cranked. After doing some research I decided that I should do the adjustable wastegate mod.
Did that today, installed it with a few turns in and I can hit around 2.03. I turned it in another 2-3 full turns and only hit about 2.06. I am monitoring the boost with datalogging with megasquirt.
Should I keep preloading the spring with the bolt or am I missing something? At the rate I'm turning the bolt it seems like going for 2.20 or more is close to impossible.
Thanks!
I am running a 1.9BAR spring (from Ben Swann) with a MBC.
I have all three lines still going to the WGFV, but I disconnected the outlet that went to the wastegate and plugged it. I then plumbed in a new line off the manifold to the inlet of my MBC and the MBC outlet is going to the wastegate.
I tried first with a manual boost controller and was only able to go from 1.82 to about 1.89-1.9 even with the MBC cranked. After doing some research I decided that I should do the adjustable wastegate mod.
Did that today, installed it with a few turns in and I can hit around 2.03. I turned it in another 2-3 full turns and only hit about 2.06. I am monitoring the boost with datalogging with megasquirt.
Should I keep preloading the spring with the bolt or am I missing something? At the rate I'm turning the bolt it seems like going for 2.20 or more is close to impossible.
Thanks!
05-14-2006, 08:25 PM
#2
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probably need to play with your VE table some more
I know that when I was running really rich I wasn't able to generate much boost, after I leaned it out I saw high boost no problem.
what turbo you running?
HTH, Jon
what turbo you running?
HTH, Jon
05-14-2006, 10:57 PM
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AFR's
I'm only running mid 11's to low 12's like what I was told to run at on the safe side. Can that actually stop the increase in boost? I'm running a K26 with a 3B SPIC.
05-15-2006, 04:24 AM
#4
what are you using to measure the boost?
It sounds to me like there is something VERY wrong. Are those numbers coming from the MS system? I would tend not to doubt them if that's the case.
With a crappy k26 I was able to spool FrankenAudi to 21 PSI on a good day and 19 PSI otherwise. And that was using a modded CIS system, MBC, Swann spring, chipped and r-modded ECU as measured on an oil filled pressure gauge.
Sounds to me like you have an intake leak Do you have a BPV installed? If not then maybe you popped the MM or the like on the pressurised intake path and it is acting like a relief valve.
With a crappy k26 I was able to spool FrankenAudi to 21 PSI on a good day and 19 PSI otherwise. And that was using a modded CIS system, MBC, Swann spring, chipped and r-modded ECU as measured on an oil filled pressure gauge.
Sounds to me like you have an intake leak Do you have a BPV installed? If not then maybe you popped the MM or the like on the pressurised intake path and it is acting like a relief valve.
05-15-2006, 06:40 AM
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Re: what are you using to measure the boost?
Ya I am using datalogging and megasquirt to measure boost levels. Yes I've got a BPV installed.
You think its a boost leak even though I can consistantly attain ~205kpa?
You think its a boost leak even though I can consistantly attain ~205kpa?
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05-15-2006, 10:58 AM
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very easily could be a boost leak with those numbers
I was consistently only getting around 12-13 psi for a while with my MS due to some nasty boost leaks. all the leaks were small enough to hold some pressure, but not enough. I fixed it by getting an air compressor to pressurize the entire intake tract and then had soapy water spray all over the tubing/intercooler/t-body/IM. Found lots of wonderful leaks! t-bolt clamps fixed almost all of them. I turns out I had one big leak in my throttlebody modification, fixed it and was making 20psi the next day.
good luck.
good luck.