triplets

[ChevyDieselLLY]

I know dodges have been running then for some time and Eric Merchant is makin a set right now. But what would be a good set of turbos for a daily driver dmax? Use the stock one and say 2 S466s? Or would they be so small? I read a dodge that had a 62 with 2 66s and made 60+ psi. That was in a DP mag. I loved my twins and why change it if its not broke but I was just thinking. Let me know what you all think

 

[skintback]

I'm not real sure what the advantage is i think maybe even lower egt's. I seen the pics of the one on the dmax they are very nice

 

[ChevyDieselLLY]

I think lower egts is one and there has to be some more power to be seen out of 3 rather then 2 turbos. Looks at some of the big sled pullers. With the 366/480 twins egts never got out of hand. Just wondering about triplets tho.

 

[Turbo Performance]

I'm not real sure what the advantage is i think maybe even lower egt's. I seen the pics of the one on the dmax they are very nice

I think lower egts is one and there has to be some more power to be seen out of 3 rather then 2 turbos. Looks at some of the big sled pullers. With the 366/480 twins egts never got out of hand. Just wondering about triplets tho.

It's still only 2 stages of compression with triples, same as twins. The difference being, you can spool 2 smaller primaries (maybe a pair or 66mm's or 71mm's etc) alot easier than one big one (S480 or S510 etc) and still flow plenty of lbs/min.

 

[ChevyDieselLLY]

Yea I get it is easier to spool 2 smaller ones over 1 large one but can you make more power out of them? Like clearly price will be higher but the PBK is like 3K so could you do triples that flow that much for less and have the smae power but much more street friendly?

 

[TrentNell]

Yea I get it is easier to spool 2 smaller ones over 1 large one but can you make more power out of them? Like clearly price will be higher but the PBK is like 3K so could you do triples that flow that much for less and have the smae power but much more street friendly?

the power will depend on the turbo's used just like anything else , and as far as being cheaper it depends , if you can build the piping your self then yes it is cheaper , if you had to pay to have the piping built then you going to be more expensive . To build a set of triplets to out flow the PBK or GT55 you would need to use 2 S480's as the atmosphere turbo's , not so sure they would spool better being that big , but should make more power , there are turbo's that will make more power and spool easier but the cost becomes more at that point . Hope this helps , the easiest way to choose the turbo's is set a LBS per minute that you need for the power you want and start looking at single's that flow 1/2 the total amount you want and go from there on what will spool , ect .

 

[SDP]

2 S475's should outflow a GT60 right?

GT60=180-200lbs per minute
2x S475=220lbs per minute

 

[ChevyDieselLLY]

Thanks for the info Trent. Sure would be a tight fit with 2 480s or 475s. Wish I had the time and tools to try and build a set.

 

[TrentNell]

2 S475's should outflow a GT60 right?

GT60=180-200lbs per minute
2x S475=220lbs per minute

you have to be carerful at where in the map you look , peak is not the truth , add the actual PR at where a big secondary runs at , and where a S547 does as a atmosphere and it changes a bit , plus I doubrt 2 T-6 chargers would be the best bet , T4 would be the ticket to keeping spool reasonable , but ya that is the premise to find 2 cgargers that will out flow 1 big one .

Thanks for the info Trent. Sure would be a tight fit with 2 480s or 475s. Wish I had the time and tools to try and build a set.

I have had a design in mind since mid season and have not ruled it out being carried out this winter Budget will decide , because the turbo's i have selected for 3 are way more expensive then a big set of compounds :baby:

 

[HEEPJEEP]

In my twin set up I have plenty of room to compound again (third stage) with another larger turbo (than the S475) and still keep the second battery and stock coolant tank in place. I would love to try three stages and see what happens... I know I would have to heavily gate around my stocker... Might not be worth trying nor have a worthwhile outcome, but something I will probably play with...

turbolvr (Carl) on the Cummins forums has built several triple setups (two parallel primaries over a single secondary). I've seen a few of his in person, pretty slick, but very tight fitting haha (he maintains his fender liner, coolant tank, and battery as well no matter what he builds). His last set up I saw was three turbos off 6.7L Cummins, those turbine housings are massive in diameter for fitting like he did.

-Dave

 

[SDP]

you have to be carerful at where in the map you look , peak is not the truth , add the actual PR at where a big secondary runs at , and where a S547 does as a atmosphere and it changes a bit , plus I doubrt 2 T-6 chargers would be the best bet , T4 would be the ticket to keeping spool reasonable , but ya that is the premise to find 2 cgargers that will out flow 1 big one .

I thought I was quoting peak for each charger, so comparing apples to apples. And you're right on going with the T-4's, the exhaust housing options on the T-6's would be way too big to spool 2 of them in parallel. I've been planning of a build like this for another truck in the future, should be fun

 

[TrentNell]

I thought I was quoting peak for each charger, so comparing apples to apples. And you're right on going with the T-4's, the exhaust housing options on the T-6's would be way too big to spool 2 of them in parallel. I've been planning of a build like this for another truck in the future, should be fun

Once you start looking at t-4 maps than you are no longer more airflow, even t-6 is under a big secondary , 2 T-4 S475's will only flow 160-180 lbs per minute peak ( I think it would be less in real world ) and by the time you buy 2 t-4 turbo's and 2 waste gates its more than a PBK so Like i said it takes 2 S480's to out perform A GT55 or PBK IMOP . Not dissing tripples I think they are a great idea , but the idea of going bigger for cheaper i am not sold on , now going bigger and spooling better I think is a maybe .

 

[Turbo Performance]

In my twin set up I have plenty of room to compound again (third stage) with another larger turbo (than the S475) and still keep the second battery and stock coolant tank in place. I would love to try three stages and see what happens... I know I would have to heavily gate around my stocker... Might not be worth trying nor have a worthwhile outcome, but something I will probably play with...

turbolvr (Carl) on the Cummins forums has built several triple setups (two parallel primaries over a single secondary). I've seen a few of his in person, pretty slick, but very tight fitting haha (he maintains his fender liner, coolant tank, and battery as well no matter what he builds). His last set up I saw was three turbos off 6.7L Cummins, those turbine housings are massive in diameter for fitting like he did.

-Dave

Pullers from way back used to do 3-4 stages of compression. Only because turbo technology wasn't really there to get the performance out of 2 stages. There's a reason everyone is only doing 2 for performance stuff now, it's way more efficient than to keep stacking turbo's and compressing (heating) the air 3-4 times.

 

[Noreaster]

Pullers from way back used to do 3-4 stages of compression. Only because turbo technology wasn't really there to get the performance out of 2 stages. There's a reason everyone is only doing 2 for performance stuff now, it's way more efficient than to keep stacking turbo's and compressing (heating) the air 3-4 times.

the small turbo ends up being the biggest restriction. theres old pics floating around of a 3 stage powerstroke from a few years back think the guys name was dzl jim.


I think the v-band exhaust housings that Bullseye makes would make the exhaust plumbing easier on 2-1 compounds but don't know how they size up to the t4/t6 housings

 

[ChevyDieselLLY]

Yea guess I didn't think about them having to be T4 and not T6 plus the waste gates. Guess if you were to do it you would almost try to go as large as you could right? Then you might see more gain to it due to the limit in chargers that are the size of the PBK. Is there anything in between the S480 and S510?

 

[TrentNell]

yea guess i didn't think about them having to be t4 and not t6 plus the waste gates. Guess if you were to do it you would almost try to go as large as you could right? Then you might see more gain to it due to the limit in chargers that are the size of the pbk. Is there anything in between the s480 and s510?

4718 ................

 

[HEEPJEEP]

Pullers from way back used to do 3-4 stages of compression. Only because turbo technology wasn't really there to get the performance out of 2 stages. There's a reason everyone is only doing 2 for performance stuff now, it's way more efficient than to keep stacking turbo's and compressing (heating) the air 3-4 times.

Yeah part of the reason I haven't messed with it. The twins I run now are awesome as is (for what I do with them). Maybe if I slapped another intercooler between stages, but again pita and still might not be efficient or effective. Still might be fun to try if I am ever not busy as hell.

 

[ChevyDieselLLY]

What about 3 GTX4202Rs? Those are some bad boys that flow a lot. Price is high but I wany to say they flow up to 120-125 lbs.

 

[ChevyDieselLLY]

Yeah part of the reason I haven't messed with it. The twins I run now are awesome as is (for what I do with them). Maybe if I slapped another intercooler between stages, but again pita and still might not be efficient or effective. Still might be fun to try if I am ever not busy as hell.

i wasnt talking about 3 stages just to smaller turbos in place of one big one.

 

[HEEPJEEP]

I realize that.