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Old 10-08-2004, 03:13 PM   #1
whtlegacy
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Default Should I port my stock turbo while I'm doing uppipe/downpipe

I'm about to install an uppipe and downpipe on my stock turbo this weekend. I already have a Borla Hush catback, Perrin Pulley, IC hoses, and Cobb Accessport in terms of power modifications. The guy who is helping me out offered to port the exhaust side of my turbo and said it shouldn't take more than 45 minutes beyond the labor we're already doing. Is it worth it? He said I might loose some boost if it is done. Can the Accessport compensate for this? I want reliability and compatibility with the Cobb stage 2 tune before anything else. I don't want to mess around with this if it could cost me power/spool.
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Old 10-08-2004, 03:21 PM   #2
crazymikie
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I thought porting the exhaust side should help spool-

If you enlarge the inlet to match the uppipe, you should get less disturbance with the exhaust flow == high velocity == quicker spool. I could be wrong though.

I believe someone talked to Cobb (he's running Stage 2) and they told him ported headers and a ported turbo will play nice with the Cobb tune just fine.

Just my $.02.
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Old 10-08-2004, 04:09 PM   #3
zinc99
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run a search for deadbolt, they port stock turbos and there is alot of info on them. They do spool faster but thats about it, its nice for you get even less lag.
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Old 10-08-2004, 05:25 PM   #4
whtlegacy
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I've heard good things about Deadbolt but I'm wondering if porting just the exhaust side would have any noticeable effects. Also, this guy was telling me that if we did it, I might loose a pound or two of boost. He suggested turning it back up with an MBC but I don't want to have to deal with that. Why would I lose boost? Would the AP compensate for this?
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Old 10-08-2004, 07:11 PM   #5
hondaeater69
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They say the AP is capable of learning around a P and P. Not sure why you would lose max boost, but you will get boost sooner. Ideally you should have a map created for P and P to shift your boost curve to the left, but cobb says it's within the learning capabilities of the ecu and map. I would also have it turbo wrapped while you have good access to it, it will help to greatly reduce underhood temps, reduce heat soak, and they say it helps keep the turbo spooled too (never noticed the last one myself). And get a heat shield too!! Those two things combined will do wonders for your TMIC. Good luck!
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Old 10-08-2004, 08:36 PM   #6
AdamRX
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what would you use to wrap the turbo and where do you get it?
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Old 10-09-2004, 01:48 AM   #7
distorto
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i think you could lose boost if you ported it too much...
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