how much boost
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
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Boost seems low, but aren't you an early 99 still? 1200*F for EGT's are not bad at all. I don't think you will ever see much more than 24-26 lbs of boost though. How much are you smoking? Also, depending on which gauges you have, look for a pinched boost line to the gauge.
Laughing Gas
Joined: Sep 2006
Posts: 1,097
Likes: 9
From: Minnesota
Sorry if I confused you, in the trucking industry we call them aftercoolers, I have be an independent owner/operator (Trucking) for 25 years and I have always known them to be aftercoolers, don't really know where the word "intercooler" ever came from, it sounds European to me. I think aftercooler comes from "after the turbo" and "cooling" the compressed air. It is the same with "Turbo Boost", it has always been called "Manifold Pressure" in our industry, just differant terms for the same thing. Sorry for the confusion! 
Senior User
Joined: Nov 2004
Posts: 399
Likes: 0
From: Draper, Utah
i have a early 99 with DiPricol gauges stock 3.5 exhaust strait piped. with the 6637 filter. my boost connection is right after the turbo in the inter cooler pipe before the inter cooler. and my EGT probe is before the turbo in the drivers side exhaust manifold right before the up pipes.
I can easily hit 20 Lbs and hold that and all i have is a 60 hp chip. the most i have hit with the egts are 1200. nothing higher. I also have soot on my up pipes right by the turbo so i might be able to get more but i don't know.
I don't know if that is normal for a early 99 but it is alot higher than yours so you probably have some sort of leak.
I can easily hit 20 Lbs and hold that and all i have is a 60 hp chip. the most i have hit with the egts are 1200. nothing higher. I also have soot on my up pipes right by the turbo so i might be able to get more but i don't know.
I don't know if that is normal for a early 99 but it is alot higher than yours so you probably have some sort of leak.
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Postmaster
Joined: Sep 2007
Posts: 4,005
Likes: 3
From: Mcafee, NJ
ok so i found one issue and one leak
issue : was that the kid at the hardware store gave me the wrong diameter tubing so the tubing was 2 different sizes from gauge to the map
leak: i a leak in the plenum boot on the passenger's side
im not sure if it was the only one because i snugged down the rest too
i had to replace the brand new ideal brand stainless steel clamps ... they are less then 2 months old and came apart as i loosened them to move the screw location
when i upgrade to 99.5 turbo I'm going to get constant pressure t bars for these boots just like the rest
im boosting 21/22 psi now and about 1100 egts
issue : was that the kid at the hardware store gave me the wrong diameter tubing so the tubing was 2 different sizes from gauge to the map
leak: i a leak in the plenum boot on the passenger's side
im not sure if it was the only one because i snugged down the rest too
i had to replace the brand new ideal brand stainless steel clamps ... they are less then 2 months old and came apart as i loosened them to move the screw location
when i upgrade to 99.5 turbo I'm going to get constant pressure t bars for these boots just like the rest
im boosting 21/22 psi now and about 1100 egts
Posting Guru
Joined: Jul 2006
Posts: 1,515
Likes: 0
From: Jonestown PA
Sorry if I confused you, in the trucking industry we call them aftercoolers, I have be an independent owner/operator (Trucking) for 25 years and I have always known them to be aftercoolers, don't really know where the word "intercooler" ever came from, it sounds European to me. I think aftercooler comes from "after the turbo" and "cooling" the compressed air. It is the same with "Turbo Boost", it has always been called "Manifold Pressure" in our industry, just differant terms for the same thing. Sorry for the confusion!
"Manifold Pressure= Turbo boost. Didn't know that either. Differnt people differnt terms, See you do learn something everyday.
Postmaster
Joined: Nov 2006
Posts: 4,196
Likes: 0
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Postmaster
Joined: Sep 2007
Posts: 4,005
Likes: 3
From: Mcafee, NJ
Its amazing how gauges will make u relize something is askew ... my truck was a good as could be I thought then I got gauges and learned diffrent. Now its a whole ne animal boosts to 20 so fast that i m not sure I wanna upgrade to the late 99 setup
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
Boost seems low, but aren't you an early 99 still? 1200*F for EGT's are not bad at all. I don't think you will ever see much more than 24-26 lbs of boost though. How much are you smoking? Also, depending on which gauges you have, look for a pinched boost line to the gauge.
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
I can run WFO in 140 and it takes me a looooong time to get anywhere near 1200°.