New turbo
Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
this compressor is supposed to have extended tip, just like bw
also 11 full blades, no splitter blades.
as for the turbine, the blades are not straight like the original ats turbo, there is a bit of a twist to them as well as being shorter towards the outside and longer(farther down stream) towards the center. not sure if that is what you mean by j hook or not
you might look into them and see what you think if you haven't.
i do know that i probably need the t4 housing though...
also 11 full blades, no splitter blades.
as for the turbine, the blades are not straight like the original ats turbo, there is a bit of a twist to them as well as being shorter towards the outside and longer(farther down stream) towards the center. not sure if that is what you mean by j hook or not
you might look into them and see what you think if you haven't.
i do know that i probably need the t4 housing though...
Thread Starter
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Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
this compressor is supposed to have extended tip, just like bw
also 11 full blades, no splitter blades.
as for the turbine, the blades are not straight like the original ats turbo, there is a bit of a twist to them as well as being shorter towards the outside and longer(farther down stream) towards the center. not sure if that is what you mean by j hook or not
you might look into them and see what you think if you haven't.
i do know that i probably need the t4 housing though...
also 11 full blades, no splitter blades.
as for the turbine, the blades are not straight like the original ats turbo, there is a bit of a twist to them as well as being shorter towards the outside and longer(farther down stream) towards the center. not sure if that is what you mean by j hook or not
you might look into them and see what you think if you haven't.
i do know that i probably need the t4 housing though...
Thread Starter
|
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
Ah, thats a nicer charger than what I was thinking. Here is the problem though.... That thing is capable of 65lb/min max, which is impressive for its size. However, its built to do that at very high pressure ratios... up in the 3.5 range. Down in the range I think you will be running it, you're looking at about 50lb/min in the peak efficiency...... Its a good looking charger, just too small, and too narrow of a compressor map.
Here are pictures of my charger, you will see the drastic differences in the wheel designs:
Here are pictures of my charger, you will see the drastic differences in the wheel designs:
Thread Starter
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Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
Boost is a measure of restriction. His ATS unit is WAAAAAY out of its efficiency range, stock cam, and a crappy turbo kit are the culprit.
Boost means almost nothing... except in this case high restriction.......lb/min is flow, and what matters.
Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
right, i understand that. but that being said is there anywhere to get a cfm meter that we could put on these trucks?
what is your target lbs/minute?
i wonder how this thing will run at 20 lbs with 21.5:1 comp and the "torque" cam? think she will hold?
what is your target lbs/minute?
i wonder how this thing will run at 20 lbs with 21.5:1 comp and the "torque" cam? think she will hold?
Thread Starter
|
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
right, i understand that. but that being said is there anywhere to get a cfm meter that we could put on these trucks?
you can get a shaft speed meter, then look at the compressor map. I'm shocked your dads turbo hasn't smoked itself..... there is absolutely nothing to gain on that charger between 20 and 27psi...20 is even pushing it.....
It would be more beneficial to run 20psi with a funtional wastegate than 27psi with it locked.
what is your target lbs/minute?
Don't have one.
i wonder how this thing will run at 20 lbs with 21.5:1 comp and the "torque" cam? think she will hold?
you can get a shaft speed meter, then look at the compressor map. I'm shocked your dads turbo hasn't smoked itself..... there is absolutely nothing to gain on that charger between 20 and 27psi...20 is even pushing it.....
It would be more beneficial to run 20psi with a funtional wastegate than 27psi with it locked.
what is your target lbs/minute?
Don't have one.
i wonder how this thing will run at 20 lbs with 21.5:1 comp and the "torque" cam? think she will hold?
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Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
it's actually a 6.9l
i know what you mean, but there is no bark or any real hints that it's about to die(keep in mind that it doesn't normally go over about 20 psi. his waster gate is functional, it will open at 27 (i think he has actually had it a tiny bit higher once but cranked it back down)
how much it the "turbo" cam? i just want to make sure i still have a good dd and pretty good fuel mileage as long as i am out of the peddle.
i know what you mean, but there is no bark or any real hints that it's about to die(keep in mind that it doesn't normally go over about 20 psi. his waster gate is functional, it will open at 27 (i think he has actually had it a tiny bit higher once but cranked it back down)
how much it the "turbo" cam? i just want to make sure i still have a good dd and pretty good fuel mileage as long as i am out of the peddle.
Posting Guru
Joined: Sep 2011
Posts: 1,523
Likes: 5
The turbo cam will be good on a DD. Racin is running between 20-25psi on his with that cam and the Comp 910s. That setup will be pretty comparable to yours. I also thought you were doing a complete rebuild? Why is your target boost so low? I thought your aim was closer to 300hp?
Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
i don't know
full rebuild yes but i don't know if i should slap this turbo on there and be happy (since it seems that we still haven't a pump that can supply us reliably. or am i wrong here?)
and i want to keep the comp as high as possible for fuel economy(the intended purpose of my truck was to be a fuel economic/reliably transport/with some pep)
full rebuild yes but i don't know if i should slap this turbo on there and be happy (since it seems that we still haven't a pump that can supply us reliably. or am i wrong here?)
and i want to keep the comp as high as possible for fuel economy(the intended purpose of my truck was to be a fuel economic/reliably transport/with some pep)
Posting Guru
Joined: Sep 2011
Posts: 1,523
Likes: 5
I would run the turbo you have at the most boost you can get with the stock IP until we do get more reliable high power IP. Both Racin and NMB2 in conjunction with their pump builder are working on the fuel issue and I am quite sure they will get up to the desired fuel level reliably. As for the amount of boost, we can run roughly 32psi and be at roughly the same dynamic compression ratio Justin is at when he pushing 40psi. I calculated on a dynamic compression ratio calculator and that is what I came up with. Granted there are more vaiables than it calculated into it but it gave me a rough estimate.
After I get my truck to Cali, I want to run it at 30psi after I get head studs and see if it ever does grenade and if it does I will do a full build after that. On my build, I will use 7.3 turbo rods and pistons and fully balance everything plus whatever else I can do to make it reliable at higher boost. On top of that I will cryo treat the rods and pistons too to add a bit more strength. After that I would think that it would take the abuse of close to 35psi.
After I get my truck to Cali, I want to run it at 30psi after I get head studs and see if it ever does grenade and if it does I will do a full build after that. On my build, I will use 7.3 turbo rods and pistons and fully balance everything plus whatever else I can do to make it reliable at higher boost. On top of that I will cryo treat the rods and pistons too to add a bit more strength. After that I would think that it would take the abuse of close to 35psi.
Posting Guru
Joined: Sep 2011
Posts: 1,523
Likes: 5
Another thing I forgot to mention is that I will keep the compression ratio at 21.5:1 to see if the engine can handle it. It will be at that compression ratio right now and after the build. I'm really interested in finding the limitations of the Idi cus I think they can handle more power than most think...
Elder User
Joined: Aug 2007
Posts: 589
Likes: 2
From: Nutter Fort,West Virginia
idk at that comp i think the bolt strength will be your weak link. just not enough steel there.
so when will you have that turbo on there nmb2?
where can you find a map for the original ats turbo?
so when will you have that turbo on there nmb2?
where can you find a map for the original ats turbo?