Official STS Rear Mount Turbo Discussion Thread
#1522
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I know it is hard to capture it on video but try to make one... You'll be the first person to complain about compressor surge especially on 0-1psi. Maybe changing the BOV Spring may help or you probably have the wrong spring in there...
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Yeah, when I replaced my Wastegate Spring I thought I'll be the size of my thumb... lol I had to sit on it just to get the spring installed...
Edit: By they way did you try to clean the BOV or lubricate it a little? Tial sometimes get stuck especially when cold and sometime a little lubricating help.. Ask Washwiz coz he had this problem before...
Edit: By they way did you try to clean the BOV or lubricate it a little? Tial sometimes get stuck especially when cold and sometime a little lubricating help.. Ask Washwiz coz he had this problem before...
Last edited by athenG; 10-31-2008 at 10:06 AM.
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Got the car back...it is louder for sure. Roads are still wet so power is hard to determine on the street as wheel spin is an issue......I do note that peak power seems to last longer in taller gears (not running out of breath I guess). Happy with the set-up so far. -Jim
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#1533
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Got it.
Are these the "solid steel blow-proof" CATS you mentioned two pages ago?
Also, when you said this setup was louder, I guess you meant your current XYZ-Pipe + Custom CAT setup is louder than your OEM Y-Pipe + OEM CAT setup. Did you notice any significant changes to AFR after the XYZ Pipe + Custom CAT installation?
Are these the "solid steel blow-proof" CATS you mentioned two pages ago?
Also, when you said this setup was louder, I guess you meant your current XYZ-Pipe + Custom CAT setup is louder than your OEM Y-Pipe + OEM CAT setup. Did you notice any significant changes to AFR after the XYZ Pipe + Custom CAT installation?
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Got it.
Are these the "solid steel blow-proof" CATS you mentioned two pages ago?
Also, when you said this setup was louder, I guess you meant your current XYZ-Pipe + Custom CAT setup is louder than your OEM Y-Pipe + OEM CAT setup. Did you notice any significant changes to AFR after the XYZ Pipe + Custom CAT installation?
Are these the "solid steel blow-proof" CATS you mentioned two pages ago?
Also, when you said this setup was louder, I guess you meant your current XYZ-Pipe + Custom CAT setup is louder than your OEM Y-Pipe + OEM CAT setup. Did you notice any significant changes to AFR after the XYZ Pipe + Custom CAT installation?
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/\ were you getting mis-fire? Have you changed your spark plugs? When I was using the copper spark plugs that came with the STS I was getting mis-fire ones a month but only on cold start. After switching to iridium spark plug (1 step colder) now I only got a mis-fire code 1-2 in 7 months...
#1537
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/\ were you getting mis-fire? Have you changed your spark plugs? When I was using the copper spark plugs that came with the STS I was getting mis-fire ones a month but only on cold start. After switching to iridium spark plug (1 step colder) now I only got a mis-fire code 1-2 in 7 months...
I have the same experience as you. My setup was first running on the one-step colder NGK copper plugs and misfiring a lot. I switched to one-step colder Denso iridium plugs, and that decreased the misfiring frequency significantly.
Most recently, I received several recommendations to change out plugs again. Denso themselves said to go one step colder for each 100CHP you produce above factory specs. So now, I'm running three-step colder Denso iridium plugs. (And no, I don't think I'm making 500-600 CHP) I have no misfires. However, are there any drawbacks to running plugs that are somewhat too cold for your application?
#1538
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I am running colder plugs but not sure which ones.....The shop installed the STS kit and I assume they used the kits plugs but I did have the iridium plugs still in the car from my previous Vortech set-up. I'll have to check with the shop.. Thanks fellas- Jim
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Speaking about plugs, here's a question I've been meaning to ask for awhile.
I have the same experience as you. My setup was first running on the one-step colder NGK copper plugs and misfiring a lot. I switched to one-step colder Denso iridium plugs, and that decreased the misfiring frequency significantly.
Most recently, I received several recommendations to change out plugs again. Denso themselves said to go one step colder for each 100CHP you produce above factory specs. So now, I'm running three-step colder Denso iridium plugs. (And no, I don't think I'm making 500-600 CHP) I have no misfires. However, are there any drawbacks to running plugs that are somewhat too cold for your application?
I have the same experience as you. My setup was first running on the one-step colder NGK copper plugs and misfiring a lot. I switched to one-step colder Denso iridium plugs, and that decreased the misfiring frequency significantly.
Most recently, I received several recommendations to change out plugs again. Denso themselves said to go one step colder for each 100CHP you produce above factory specs. So now, I'm running three-step colder Denso iridium plugs. (And no, I don't think I'm making 500-600 CHP) I have no misfires. However, are there any drawbacks to running plugs that are somewhat too cold for your application?
I'm not a spark plug expert but with your power I think 2 step is more than enough.. I think the Gap is also important since you are boosting 14+psi.