boost numbers with stage 2s?
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Elder User
Joined: May 2007
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From: North East, MD
boost numbers with stage 2s?
What kind of numbers are you guys seeing with 2s and a d66? With out the chip i can only make about 17 and my hot tune around 25-27. Tony has my chip at the moment but numbers seem low to me. Up pipes aren't leaking. I haven't tried pressure testing the IC yet
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Joined: Mar 2008
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From: Billerica, MA
without my chip in the truck I can hit 32-33 lbs on the highway really gettin into it. This is with 160/80's and a stock charger. With the chip that was tuned for stock injectors I could slap the 35 lb gauge in the face and she still pulled hard after that so I'm guessing 38-40.
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Elder User
Joined: May 2007
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From: North East, MD
mine would peg the 35* gauge with ease when I had a stock charger on it. I find it hard to believe that an IC and D66 would make that much diff. I'm pretty sure its a boost leak some where 
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Joined: Mar 2008
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From: Billerica, MA
Ya i find it hard to believe that a D66 is going to make you lose boost. I can see 2-4 lbs from the I/C but were is the rest going??? There is no way that D66 made you lose that much, I mean it is a still a stock charger. I'm going to guess boost leak aswell, might want to make up one of them fancey boost leak testers...
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
D66 should hold up over 30 lbs from my understanding due to ball bearings instead of journals like the stock charger. Thus allowing you to go over the normal 30lbs you might dust it theory.
I'd really try to base the boost more on how well the truck is running.
Does it seem to run good? Just cause the boost numbers are low doesn't mean a lot.
Where is your boost sensor? In the spider, or in the MAP line?
Does somebody have a sensor like yours you can swap in to see if its just getting a bad reading?
If everything else is kosher, then You got a leak for sure.
Did you replace your Up Pipe doughnuts? Did you re torque them after a heat cycle or 2? They will leak when they are new after a good heat cycle.
If you have a scan gauge, see what the MAP sensor is saying for boost.
I'd put the boost sensor in the spider, IMO. Thats just me though.
If your airways for the IC are restricted, you will loose boost I think is how it goes. Takes longer for the air to get in there, so you loose the boost, so if something is screwed up.
Just thoughts here. =)
I'd really try to base the boost more on how well the truck is running.
Does it seem to run good? Just cause the boost numbers are low doesn't mean a lot.
Where is your boost sensor? In the spider, or in the MAP line?
Does somebody have a sensor like yours you can swap in to see if its just getting a bad reading?
If everything else is kosher, then You got a leak for sure.
Did you replace your Up Pipe doughnuts? Did you re torque them after a heat cycle or 2? They will leak when they are new after a good heat cycle.
If you have a scan gauge, see what the MAP sensor is saying for boost.
I'd put the boost sensor in the spider, IMO. Thats just me though.
If your airways for the IC are restricted, you will loose boost I think is how it goes. Takes longer for the air to get in there, so you loose the boost, so if something is screwed up.
Just thoughts here. =)
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From: Billerica, MA
The Dominator 66 is not a ball bearing cartridge, it has the same center section as a stock charger so it is a journal bearing just like the stocker. I believe that the only difference is that the compressor wheel is larger, that information I don't remember 100% but I know that the center section is the same.
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Elder User
Joined: Sep 2003
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From: Quinton NJ
The Dominator 66 is not a ball bearing cartridge, it has the same center section as a stock charger so it is a journal bearing just like the stocker. I believe that the only difference is that the compressor wheel is larger, that information I don't remember 100% but I know that the center section is the same.
Post Fiend
Joined: Mar 2007
Posts: 9,010
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From: Johnson City, TN.
a D66 is basically a stock turbo on steroids. It is a great turbo for use with stage I's but not really intended for stage II's. I can hit 40 psi with my II's and the D66 is not made for that pressure.
I would recommend H2e with II's.
I would recommend H2e with II's.
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Elder User
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From: North East, MD
Answers in red
D66 should hold up over 30 lbs from my understanding due to ball bearings instead of journals like the stock charger. Thus allowing you to go over the normal 30lbs you might dust it theory.
Someone beat me to it but the D66 has stock style bearings but is a huge improvement over a stock charger
I'd really try to base the boost more on how well the truck is running.
Does it seem to run good? Just cause the boost numbers are low doesn't mean a lot.
Truck runs good but feels laggy and doesnt feel like it has the boost
Where is your boost sensor? In the spider, or in the MAP line?
Boost line is in the spider
Does somebody have a sensor like yours you can swap in to see if its just getting a bad reading?
Its a mechanical gauge. Doubt its off but small chance
If everything else is kosher, then You got a leak for sure.
Did you replace your Up Pipe doughnuts? Did you re torque them after a heat cycle or 2? They will leak when they are new after a good heat cycle.
doughnuts and manifolds are new but never re torqued but don't have any soot around them
If you have a scan gauge, see what the MAP sensor is saying for boost.
Scan gauge is in the mail
Thats the first thing on my list when i get it
I'd put the boost sensor in the spider, IMO. Thats just me though.
If your airways for the IC are restricted, you will loose boost I think is how it goes. Takes longer for the air to get in there, so you loose the boost, so if something is screwed up.
Just thoughts here. =)
Someone beat me to it but the D66 has stock style bearings but is a huge improvement over a stock charger
I'd really try to base the boost more on how well the truck is running.
Does it seem to run good? Just cause the boost numbers are low doesn't mean a lot.
Truck runs good but feels laggy and doesnt feel like it has the boost
Where is your boost sensor? In the spider, or in the MAP line?
Boost line is in the spider
Does somebody have a sensor like yours you can swap in to see if its just getting a bad reading?
Its a mechanical gauge. Doubt its off but small chance
If everything else is kosher, then You got a leak for sure.
Did you replace your Up Pipe doughnuts? Did you re torque them after a heat cycle or 2? They will leak when they are new after a good heat cycle.
doughnuts and manifolds are new but never re torqued but don't have any soot around them
If you have a scan gauge, see what the MAP sensor is saying for boost.
Scan gauge is in the mail
Thats the first thing on my list when i get it
I'd put the boost sensor in the spider, IMO. Thats just me though.
If your airways for the IC are restricted, you will loose boost I think is how it goes. Takes longer for the air to get in there, so you loose the boost, so if something is screwed up.
Just thoughts here. =)
