Large "factory appearing" Atmosphere results thread..

[blk350on20s]

Lmao. Blushing

 

[3brorce]

Honestly there are better deals out there, sounds like his chargers work very well though. I'm over the butt dynbo ish, whatever I get will be put on the dyno back to back to compare the gain over stock charger on stock fuel.

I dont know about better deals as I dont spend money where its not needed but if I had a 224xlc at my disposal I would do the same.

 

[MINK]

I dont know about better deals as I dont spend money where its not needed but if I had a 224xlc at my disposal I would do the same.

Just like to see how it stacks up to some other chargers, precision wheels have always seemed to make better power.

 

[3brorce]

Just like to see how it stacks up to some other chargers, precision wheels have always seemed to make better power.

Yeah, maybe if I make it to the memorial pull I will throw her on the dyno.

 

[2good2Btru]

Cant compare the 76 to stock, but I can compare the 76 to Elite's 72.

At the track with the 72, I went 12.8@104.

At the track with the 76, I went 12.4@109.

I have dual pumps, 60hp nozzles, and stock VGT. Additionally, I can say that the EGT's are 25-50* lower cruising with the 76 over the 72, and EGT's take much longer to climb with the 76. WOT temp drop was close to 100*.

I take it that these runs were in high elevation. I'm just asking because i ran a 12.6 on my truck with with everything stock and only a tune but at sea level . Have you ever ran your truck closer to sea level. I just wonder what a 76 could do at sea level.

 

[jdgleason]

I take it that these runs were in high elevation. I'm just asking because i ran a 12.6 on my truck with with everything stock and only a tune but at sea level . Have you ever ran your truck closer to sea level. I just wonder what a 76 could do at sea level.

Yes sir. When I went to Phoenix (1,600' above sea level) I went 12.9 on stock turbos which was .7 faster than here lol.

By that estimation, I would say sea level would be close to 1 second faster than my times here. My truck went 13.6 here all stock.

 

[Morgan@Midwest Diesel & Auto]

Doing the testing I have between precision's wheels and competitor's wheels, I'm going to disagree.

Precision wheels of the same size normally make a good bit more power than the competition. Making assumptions based on this, I will go out on a limb and say there is a good bit more power to be had with the 76 over RCD's 75.

I do agree that they are both quality turbos, but to say there is little or no difference in power with no data seems silly.

Possible. Never said they were bad. Just haven't heard any real dyno numbers to speak of. Not saying they aren't out there either. I know for a fact the 75/59 has made well over 800 on at least three trucks on three different dynos. I also know dyno numbers are subjective. But I also have been around trucks with both. I would still say there is not a huge difference if any. But till we can put them on the dyno I guess we won't know. The 75 with the larger turbine seems to be a big advantage. Last I check the 76 still was using a smaller turbine. Correct me if I am wrong.

Would love to test them back to back.

I know precision does really well with their wheels. I've used them on other trucks and loved the results. But that doesn't mean there can't be another turbo out there that can perform as good or better does it?

 

[smokinstroker]

i would be interested in the turbine information as well.

 

[HOOV3R]

By 76 are you guys referring to the Jr High Power or the Tow X? The Tow X isn't exactly stock appearing.

 

[smokinstroker]

high power jr. "stock appearing".....

 

[2good2Btru]

i would be interested in the turbine information as well.

whs

 

[HOOV3R]

high power jr. "stock appearing".....

Just making sure. Some people consider some ridiculous stuff to be stock appearing LOL

 

[Wayne]

i would be interested in the turbine information as well.

I have not tested RCD's turbo, but I have a pretty educated guess on how it stands. I'm sure it's good, as well as the customer service to back it up. Here's my insight on what I do know. I don't know if you remember all the turbo testing on the street and dyno I did for Elite, but I can tell you the the stock appearing precision 76 atmo did best of all, followed closely by a non-precision billet 75 (currently in my truck) running a stock size turbine wheel, then the 72 precision, which was very similar on the top end to a cast 75, but lit faster. ( We also did various turbine wheel tests, and there's a very good performance reason the Elite spec'd units have the turbine wheels they have.) I will not give exact specs of the Elite spec'd turbine wheels, but if somebody else knows, and wants to advertise, that's their business. That 76 loves to be spun hard though. It doesn't even surge at any point except with a heavy load on running high (52+ psi) boost steadily below 1700 rpms. There's minimal back pressure increase with the the wheel it has over a larger one, and a fair amount of more power. With a stock VGT turbine wheel, the greatest restriction is in the VGT. With the larger vgt turbine wheel that's in the billet 59 elite vgt, the 76 still did better in every regard except for back pressure on the top end where it crept up a bit more than with a larger turbine wheel (we're talking @ 5 psi) but that's on dual pumps, and 110 hp nozzles with the wastegate forced shut. Thanks to dialing in the wastegate, everything stays in check, and works great. My first choice based on my experience is a no-brainer. Keep in mind I have not even seen the RCD built unit except for pics, and am only speaking from experiences of similar ones tested by us while I worked for Elite.

 

[Morgan@Midwest Diesel & Auto]

I have not tested RCD's turbo, but I have a pretty educated guess on how it stands. I'm sure it's good, as well as the customer service to back it up. Here's my insight on what I do know. I don't know if you remember all the turbo testing on the street and dyno I did for Elite, but I can tell you the the stock appearing precision 76 atmo did best of all, followed closely by a non-precision billet 75 (currently in my truck) running a stock size turbine wheel, then the 72 precision, which was very similar on the top end to a cast 75, but lit faster. ( We also did various turbine wheel tests, and there's a very good performance reason the Elite spec'd units have the turbine wheels they have.) I will not give exact specs of the Elite spec'd turbine wheels, but if somebody else knows, and wants to advertise, that's their business. That 76 loves to be spun hard though. It doesn't even surge at any point except with a heavy load on running high (52+ psi) boost steadily below 1700 rpms. There's minimal back pressure increase with the the wheel it has over a larger one, and a fair amount of more power. With a stock VGT turbine wheel, the greatest restriction is in the VGT. With the larger vgt turbine wheel that's in the billet 59 elite vgt, the 76 still did better in every regard except for back pressure on the top end where it crept up a bit more than with a larger turbine wheel (we're talking @ 5 psi) but that's on dual pumps, and 110 hp nozzles with the wastegate forced shut. Thanks to dialing in the wastegate, everything stays in check, and works great. My first choice based on my experience is a no-brainer. Keep in mind I have not even seen the RCD built unit except for pics, and am only speaking from experiences of similar ones tested by us while I worked for Elite.

Thanks Wayne.

It think it's safe to say your testing was probably close to how it would end up if you had tested the RCD 75 instead of the billet 75 elite. And it may very well be the same. I think until we get a back to back this is all just going to be a pissing match with no concrete proof. The precision may very well make more power. But if there is 10hp between the two or maybe less, I think it would be a moot point. Now if there is 50hp then yeah.

Like I said earlier, not saying the 76 elite is bad. I just think there should not be discredit to the 75 RCD. Seems like wether or not there is any proof, certain people just automatically say that "nothin can equal a xxxx" whatever. I personally do not ever fall into any stereotype for anything. If it's not proven, the whole "it's gotta be good because it's a xxxx" philosophy doesn't stand with me. Also for that matter the "since it's not a xxxx, it must be inferior" doesn't either.

So before the butt hurt begins I will say one more time. I've had great luck with the 6.4 precision stuff. They run great. Just don't know why we automatically rule out any other options here.

That is all.

 

[2good2Btru]

Thanks Wayne.

It think it's safe to say your testing was probably close to how it would end up if you had tested the RCD 75 instead of the billet 75 elite. And it may very well be the same. I think until we get a back to back this is all just going to be a pissing match with no concrete proof. The precision may very well make more power. But if there is 10hp between the two or maybe less, I think it would be a moot point. Now if there is 50hp then yeah.

Like I said earlier, not saying the 76 elite is bad. I just think there should not be discredit to the 75 RCD. Seems like wether or not there is any proof, certain people just automatically say that "nothin can equal a xxxx" whatever. I personally do not ever fall into any stereotype for anything. If it's not proven, the whole "it's gotta be good because it's a xxxx" philosophy doesn't stand with me. Also for that matter the "since it's not a xxxx, it must be inferior" doesn't either.

So before the butt hurt begins I will say one more time. I've had great luck with the 6.4 precision stuff. They run great. Just don't know why we automatically rule out any other options here.

That is all.

Well said

 

[B585Ford]

Here's a pic of my old 71 and new JHP side by side.

 

[johnp115]

Gonna bump this

Anything proven on this now?

More people running just the 76/75 atmo and stock vgt that have results/thoughts?

 

[Csilva187]

It reminds me that I need a transmission mostly. Nothing new tho that hasn't been said. Cooler egt's with much more power and not a real difference with EBP. Do it.

 

[johnp115]

It reminds me that I need a transmission mostly. Nothing new tho that hasn't been said. Cooler egt's with much more power and not a real difference with EBP. Do it.

Def gonna pretty soon

Just was searching up and saw not much has been said.

Does it spool pretty much like stock and pulls way harder?

 

[B585Ford]

I am having a fueling issue so I still don't have mine on the road...I will try to give an update when my truck is running.