D66 what exhaust housing?

[Bluke]

The turbo will be a rebuildable ball bearing with a high flow outlet and billet wheel from kc turbos Inc. It will be a complete drop in turbo. They are currently testing the L99 version. It's on Corey's truck from cncfabricationllc. He is a dealer for kc turbos. Charlie also has a website but the only thing he has right now for the 7.3 is the kc66 for the L99-03. That's what I'm currently running.

 

[flocksmonster garage]

Well i got my d66 in with the 1.0 housing and to be honest I barely feel any difference in my truck at all. Kind of a let down but oh well.

 

[flocksmonster garage]

May be switching back to the 1.15 housing, I was on the highway going to school today, and the egts were 900 with 7 lbs of boost at 75-80 mph turning 2400-2500 rpm. I feel like that's pretty high considering when I drive to work (around an hour) I almost always do at least 75.

 

[Swaan]

You switch to a 115 and cruising empty your boost will be lower and egts will be even higher .

People just don't get it .
But go ahead ,see for yourself.
By the way 900 isn't to bad considering your doing 80mph

 

[flocksmonster garage]

lol seems like I hit a nerve there, but really eplain it to me, I just don't see how it could be higher with the 1.15?

 

[Strokersace]

Swaan, do you have 1st hand experience with stage 2s with a 1.0 and 1.15 exhaust housing on one of these turbos?

Curious as to where your advice is coming from.

 

[Bluke]

A d66 with a 1.15 exhaust housing will be very laggy. It will cause it to be out of its compressor map and be inefficient. Causing low boost and high egts. Like said above 900 isn't too bad. Just make sure you don't have any boost or drive pressure leaks.

 

[flocksmonster garage]

I never thought about how the computer would react, And that does make sense. I will be checking for boost leaks once I get some new clamps from RIFFRAFF. I know my drivers side up pipe has a small leak, but the bolts are so rotted that they look like toothpicks, so I am running it for as long as I can the way it is. I have a feeling I will be pulling the motor when it is time to replace them.

 

[Strokersace]

A d66 with a 1.15 exhaust housing will be very laggy. It will cause it to be out of its compressor map and be inefficient. Causing low boost and high egts. Like said above 900 isn't too bad. Just make sure you don't have any boost or drive pressure leaks.

What's different that would make the d66 laggier with a 1.15 housing as compared to a stock turbo with 1.15 housing?

 

[Strokersace]

I never thought about how the computer would react, And that does make sense. I will be checking for boost leaks once I get some new clamps from RIFFRAFF. I know my drivers side up pipe has a small leak, but the bolts are so rotted that they look like toothpicks, so I am running it for as long as I can the way it is. I have a feeling I will be pulling the motor when it is time to replace them.

He's not taking about the electronic compressor map, he's describing the mechanical compressor map of the turbo.

 

[Swaan]

lol seems like I hit a nerve there, but really eplain it to me, I just don't see how it could be higher with the 1.15?

Like already said, it will be higher at cruise speed because your taking away some off the drive pressure going to the turbine by putting a bigger A/R housing on.
Therefore, less boost, more heat. Simple as that.

Only time You'd see lower egts with 1.15 is if you were Wide open throttle and you were getting close to the choke point of the 1.00.

 

[Strokersace]

Like already said, it will be higher at cruise speed because your taking away some off the drive pressure going to the turbine by putting a bigger A/R housing on.
Therefore, less boost, more heat. Simple as that.

Only time You'd see lower egts with 1.15 is if you were Wide open throttle and you were getting close to the choke point of the 1.00.

My question still stands...

 

[Bluke]

Thw d66 compressor wheel is larger than the stock one. So it needs more energy to get it going. Therfore it will be more laggy. Like said above thw 1.15 housing will work really good in high rpm situations but as a dd it will suck.

 

[Swaan]

My question still stands...

Stroker,
Yes all my data is real life experiences.
I've had stock,160/Sg1, 175/80 stg2
Stock turbo,bell BASB, s366 with both stock and gtx billet wheels,and this current 364.5fmw.
Not to mention I've owned many class 8 trucks with big cats and detroits and have done various testing on diffrent turbo setups on those as well.I guess you can say I'm a little bit of a turbo whore and I'm always striving for perfection. Regardless, I'm not just pulling data out my ass here or just spouting off stuff I've read on the Internet.
I'm just trying to save people some hard earned cash and aggravation by doing it right the first time.
But all things aside, it's just basic turbo knowledge here, it goes much deeper then just A/R size

 

[Strokersace]

Thw d66 compressor wheel is larger than the stock one. So it needs more energy to get it going. Therfore it will be more laggy. Like said above thw 1.15 housing will work really good in high rpm situations but as a dd it will suck.

Bluke, I'll ask you the same question I did Swaan, do you have 1st hand experience with this to base your advice on?

 

[Strokersace]

Stroker,
Yes all my data is real life experiences.
I've had stock,160/Sg1, 175/80 stg2
Stock turbo,bell BASB, s366 with both stock and gtx billet wheels,and this current 364.5fmw.
Not to mention I've owned many class 8 trucks with big cats and detroits and have done various testing on diffrent turbo setups on those as well.I guess you can say I'm a little bit of a turbo whore and I'm always striving for perfection. Regardless, I'm not just pulling data out my ass here or just spouting off stuff I've read on the Internet.
I'm just trying to save people some hard earned cash and aggravation by doing it right the first time.
But all things aside, it's just basic turbo knowledge here, it goes much deeper then just A/R size

So you've not actually ran a d66 based on this post...

And you're right, it isn't just turbine housing that plays a role. However, you're advising based on a turbine housing size. And one on a turbo that is appears that you've never actually ran.

 

[Swaan]

Dude, I've ran the stock turbo.The d66 is a stock turbo with a bearing upgrade and a 66/88 comp wheel, big deal.
I know the effects of a bigger comp wheel has on a turbo.
Have I actually run a d66, the answer is NO.
Because I was smart enough to know there is far better choices out there.The only thing that turbo has going for it is that it's a drop in replacement, that's it.I can see why people put them in for not everyone wants to do the full meal deal with up pipes and whatnot.
But if that's what you wanted to hear because it makes you feel better then no I have not run a modified stock turbo and for good reason.

 

[Bluke]

Bluke, I'll ask you the same question I did Swaan, do you have 1st hand experience with this to base your advice on?

I do. I'm currently running a kc66 on my truck right now. It's just a d66 made by kc turbos. It's on my superduty. It have a 1.0 exhaust housing. I have 35" tires and a standard trans. Just so you know the size of tire and trans makes a difference on how you set up your turbo. Currently running stock injectors. I'm regretting running the 1.0 housing now because it's laggy. I've really been back and forth with changing it but I'm waiting tell get my injectors installed. But most likely going back down to he .84 housing.

I also have talked with Barder and kc turbos about this setup. And also running a d66 setup on a van turbo. 1.15 housing by the way. They said it would be way to laggy.

Don't know why your questioning our credibility of knowledge.

 

[Strokersace]

Thank you both for proving my point. You actually don't know 1st hand on this particular turbo he's running with his gears, his tires, his injectors, his tuning, etc.

SD and OBS gearing is not the same unless you have changed your gears. Stock SD injectors are not the same as aftermarket. Does he have an intercooler? I haven't saw where its stated in the thread, you have one factory. My point being, cannot say definitively how its going to be.

Oh and BTW, if you knew as much about turbos as you claim to, then you'd know that the d66 comes from Bean's with a 1.15 exhaust housing, same as factory. The 1.0 is an option. Plus the larger (supposedly heavier wheel as Bluke said created the lag) actually increases airflow over factory which helps reduce egt's.

But hey, what do I know. I'm not a self described "turbo whore". I'm just someone that has ran different variations of stock style turbos with stage 1s and 2s, with different gear and tire combinations, through the mountains and on the flat, NOT running WOT everywhere I go while empty and towing. In EVERY scenario of MINE, the 1.15 exhaust housing had better manners and drivability overall than the smaller housings. I experienced zero lag. But again, what do I know...


What I do know is that both of you sure do get your panties in a bunch when your advice is questioned!! Lol

 

[Swaan]

Hey bud, you know what, as long as your happy that's really all that matters in the end . Oviously you love the d66, right on!!