NB2 intercooler routing suggestions (paging 18psi)
#1
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NB2 intercooler routing suggestions (paging 18psi)
Hey All,
I've looked at many a intercooler photo, and it seems that routing on the 2001+ with A/C and P/S is the hardest. People seem to like 18psi's handy work, but those photos have since expired.
The intercooler I got has 2.25 inlets (despite advertising as 2.5). Is there any downside to changing diameters multiple times? The turbo outlet is 2.25, and some people go with 2 inch on the hot side, then the TB is 2.5. What if I put 2.25 as far as I could go on the hot side and then reduced to 2 inch if the fit is too tight before bumping up to 2.25 before the intercooler, then starting with 2.5 at the TB and reducing to 2.25 where I need to for fitment? Or just make my life easier with a 2 inch kit and the appropriate reducers?
I've looked at many a intercooler photo, and it seems that routing on the 2001+ with A/C and P/S is the hardest. People seem to like 18psi's handy work, but those photos have since expired.
The intercooler I got has 2.25 inlets (despite advertising as 2.5). Is there any downside to changing diameters multiple times? The turbo outlet is 2.25, and some people go with 2 inch on the hot side, then the TB is 2.5. What if I put 2.25 as far as I could go on the hot side and then reduced to 2 inch if the fit is too tight before bumping up to 2.25 before the intercooler, then starting with 2.5 at the TB and reducing to 2.25 where I need to for fitment? Or just make my life easier with a 2 inch kit and the appropriate reducers?
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#2
Hey All,
I've looked at many a intercooler photo, and it seems that routing on the 2001+ with A/C and P/S is the hardest. People seem to like 18psi's handy work, but those photos have since expired.
The intercooler I got has 2.25 inlets (despite advertising as 2.5). Is there any downside to changing diameters multiple times? The turbo outlet is 2.25, and some people go with 2 inch on the hot side, then the TB is 2.5. What if I put 2.25 as far as I could go on the hot side and then reduced to 2 inch if the fit is too tight before bumping up to 2.25 before the intercooler, then starting with 2.5 at the TB and reducing to 2.25 where I need to for fitment? Or just make my life easier with a 2 inch kit and the appropriate reducers?
I've looked at many a intercooler photo, and it seems that routing on the 2001+ with A/C and P/S is the hardest. People seem to like 18psi's handy work, but those photos have since expired.
The intercooler I got has 2.25 inlets (despite advertising as 2.5). Is there any downside to changing diameters multiple times? The turbo outlet is 2.25, and some people go with 2 inch on the hot side, then the TB is 2.5. What if I put 2.25 as far as I could go on the hot side and then reduced to 2 inch if the fit is too tight before bumping up to 2.25 before the intercooler, then starting with 2.5 at the TB and reducing to 2.25 where I need to for fitment? Or just make my life easier with a 2 inch kit and the appropriate reducers?
#3
Narrower plumbing definitely makes routing easier.
What you want to avoid is downsizing in the chain from the turbine outlet to the TB, that'll throttle your airflow.
ie. If your turbine outlet is 2.25" and your intercooler barbs are 2.25", keep the hotside plumbing 2.25". For the coldside use 2.25" and a hose reducer elbow from your TB to the 2.25" coldside plumbing.
What you want to avoid is downsizing in the chain from the turbine outlet to the TB, that'll throttle your airflow.
ie. If your turbine outlet is 2.25" and your intercooler barbs are 2.25", keep the hotside plumbing 2.25". For the coldside use 2.25" and a hose reducer elbow from your TB to the 2.25" coldside plumbing.
#5
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Could you repost your routing photos? The left headlight has a hole that could just be enlarged, and I'm guessing you put a hole in the other side in the same place?
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#9
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Thanks! I've got the same tires, and had the same wear on the front
18psi - is "traditional" routing on the cold side straight down from the TB, under the sway bar, and a 180 around the rad? Or something else?
18psi - is "traditional" routing on the cold side straight down from the TB, under the sway bar, and a 180 around the rad? Or something else?
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#11
Would I do either routing again? I don't know. Hot side makes more sense than cold side. Both may require a custom wastegate actuator bracket. I bought one online that did the job in the end. This one:
Garrett Actuator Wastegate Bracket Fits All GT25R GT28R GT30R GT35R GT40R GTX T3 | eBay
Garrett Actuator Wastegate Bracket Fits All GT25R GT28R GT30R GT35R GT40R GTX T3 | eBay
#13
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Bumping an oldddd thread!
To anyone that fit 2.5 inch piping behind the headlights, how much material did you have to take out of the hole? Did you just whack it a few times? Grind some ish off with a dremel or was it more involved?
Thanks!
To anyone that fit 2.5 inch piping behind the headlights, how much material did you have to take out of the hole? Did you just whack it a few times? Grind some ish off with a dremel or was it more involved?
Thanks!
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I'm shooting for 2.5" with 2" as a backup if it just doesn't work for whatever reason.