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gauges are in, now have a few ?'s

1048 Views 7 Replies 3 Participants Last post by  rednck21
i notice the egt's climb very quikly. i can hold it to the floor for only a couple seconds and its at 1200 deg /ubbthreads/images/graemlins/eek.gifi drilled and tapped for the thermocouple in the manifold about 2" or so from the up pipe collector. is that normal?

also im only seeing about 23lbs of boost. is that because of the WW?
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Your low boost number is probably due to the weak stock wastegate actuator. With your hotter programming, the PCM isn't instructing the wastegate to open yet at only 23 psi (I'm assuming /ubbthreads/images/graemlins/smirk.gif) but the weak stock actuator can't keep the wastegate shut, regardless.

I installed the Banks Big Head actuator on my truck this weekend (along with ATS housing and ITP boost regulator, too). Previously the highest boost I'd seen was 21 psi. First time getting on the freeway, I stepped on it and boost went up to about 28 psi. /ubbthreads/images/graemlins/smokin.gif This is with the SCMT on I'm not sure what level. Anyway, with the Big Head, it's strong enough to hold the wastegate shut until it's told to open by the PCM... it's adjustable, as well. I'd recommend it. A bit pricey, but seems to do a great job so far. /ubbthreads/images/graemlins/cool.gif

Just thought I'd recommend it based on my recent experience.

edit - I should also mention to check for any boost leaks, too, which could be costing you boost.
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The EGTs surprise me as well... not really sure what the answer is on that. /ubbthreads/images/graemlins/frown.gif

I think the ATS may have partially contributed to the big boost jump I've seen so far. It does have a full 4" inlet and tube rather than the stocker 3". I think the big head had the biggest impact as far as boost numbers go, though, in my case.
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