Compound turbo set up help?

Headcase98002 said:
Yes, but if the .70AR non-gated housing is devided, I would use that and external wastegate. To me, the purpose of compounds are to get it to spool quick and keep that flow throughout the entire powerband.
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Who makes a turbo where there housing isn't divided. I was looking at the phat shaft but it sounds like people are talking up the HTT, which is a better turbo?
 
Headcase98002 said:
Yes, but if the .70AR non-gated housing is devided, I would use that and external wastegate. To me, the purpose of compounds are to get it to spool quick and keep that flow throughout the entire powerband.
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Exactly. My 62 now starts to wind out at 2000-2200 rpms which is right where my primary should really start coming on hard.

The divided .7 housing is the best option for a set of twins for towing and playing on a secondary. External waste gate is an absolute must in twins though. TMONEYDIESEL on here can hit you up with needed chargers, gates, and manifolds.
 
99GreenCummins said:
Exactly. My 62 now starts to wind out at 2000-2200 rpms which is right where my primary should really start coming on hard.

The divided .7 housing is the best option for a set of twins for towing and playing on a secondary. External waste gate is an absolute must in twins though. TMONEYDIESEL on here can hit you up with needed chargers, gates, and manifolds.
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Excuse me if this is a stupid question but what is a .7 extended housing?
 
99GreenCummins said:
.7 is the AR for exhaust housing on the turbo. .7 housing is almost equivalent to a 12cm housing. Divided means it has a split entrance into housing.
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Ok so if I understand correctly it would now be a 62/65/.7 rather than the 12cm and the divided housing is on the exhaust side? Do they make turbos with these specs and the housing divided, or do I gotta buy the exhaust housing and put it on?
 
After a lot of over reading I think I get it. So instead of the 12cm internal gated housing your saing to get a .7 divided non gated housing and add the external wastgate? Sounds like a lot of tuning lol would the 12cm gated housing be ok though?
 
The 12cm housing is actually a .70AR housing. They just use the CM as a reference to the Holset housings. Tuning would the any different betwee the external ant internal gate.

I would think the internal gate would be sufficient.
 
I've ran a 62/65-12 over a S475 for years. With Mach7s (240hp) injectors I could haul all day on my kill setting with a 6 speed. When I swapped to auto it got warm. Overall great setup
 
Headcase98002 said:
The 12cm housing is actually a .70AR housing. They just use the CM as a reference to the Holset housings. Tuning would the any different betwee the external ant internal gate.

I would think the internal gate would be sufficient.
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Gotcha, Well what's better? Would you run the divided housing with external gate or the standard housing with internal gate?
 
8UPRACIN said:
I've ran a 62/65-12 over a S475 for years. With Mach7s (240hp) injectors I could haul all day on my kill setting with a 6 speed. When I swapped to auto it got warm. Overall great setup
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Finally someone with exact set up I'm looking for, that's great to hear. I was thinking some DAP or CPP 7x.010 for the 62 and when I get my 475 pump it up to some 7x.012 does that sound about right?
 
I run a 57/65/14 over 75/96/1.32AR with 6x.013 injectors

runs about 1400-1450 @ wot all the way to redline in 6th gear with timing reduced for absolute maximum fueling/power at WOT.

with timing bumped to 10* 1350* is max @ WOT but boost is a bit less and max power is about 40hp less...great for fuel economy though. spoolup is pretty quick.

now running without wiretap fueling for towing or just daily driving, I can't get it above 1200* even revving up to redline in 6th
 
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jigabop said:
I run a 57/65/14 over 75/96/1.32AR with 6x.013 injectors

runs about 1400-1450 @ wot all the way to redline in 6th gear with timing reduced for absolute maximum fueling/power at WOT.

with timing bumped to 10* 1350* is max @ WOT but boost is a bit less and max power is about 40hp less...great for fuel economy though. spoolup is pretty quick.

now running without wiretap fueling for towing or just daily driving, I can't get it above 1200* even revving up to redline in 6th
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I think you were helping me out a few months back when I was looking to build my truck on cummins performance forum. You 1st got me me rested in the Super B for a primary then add as a secondary for twins. But in think in liking the 62/65/12 route a little bit better.
 
should spool about the same as a super-b

just make sure the gate is plenty big and adjustable to keep drive pressures in check.
 
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