what turbo to twin with the stock turbo

CUMMINSGMC75 · 11-01-2009, 08:03 PM

on my conversion build, im thinking about putting twins on the truck, but want to do it on a budget, so whats a good turbo that can be used with the stock turbo that will supply enough air for about 500-600 hp?

thanks

__________________
In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

cbtoyz · 11-01-2009, 09:11 PM

A standard S400 will work well, and can be had brand new for around 650 bucks if you know where to look.

__________________
Colin-'06 QC, SB, 4x4- 853hp/1467 & 11.30@122mph. Thanks, Brad and everybody at Ponci's Diesel Center, Dave Goerend and everyone who helped along the way!

CUMMINSGMC75 · 11-01-2009, 09:15 PM

thanks...i really dont know where to look though

, what are some good brands for the s400. i have never done turbos before so this will be my first time working on them

__________________
In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

cbtoyz · 11-01-2009, 09:29 PM

An S400 is a Schwitzer turbo, built by Borg Warner. They can vary a lot in size. For a primary charger you should look for something in the neighborhood of a 74/83/1.10 with a T-6 housing would be good. Here is a link to get you started. Bullseye Power Turbos

__________________
Colin-'06 QC, SB, 4x4- 853hp/1467 & 11.30@122mph. Thanks, Brad and everybody at Ponci's Diesel Center, Dave Goerend and everyone who helped along the way!

CUMMINSGMC75 · 11-01-2009, 09:44 PM

thanks, that site really clears things up

__________________
In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

sstockton · 11-01-2009, 10:50 PM

majestic turbo sells them with a 1.32A/R t6 housing for $585. Same spec on the Comp wheel, and turbine exducer.
index Dallas Turbo
Its under specials.

The the charger is very restrictive in the exhaust department. You will definitely want to address that with an external wastegate.
Sean

__________________
2000 2500 Reg. Cab 4x4. Built trans, Twins, Edge drag box, Sticks, Studs, cam, Gauges, etc...
09 2500 6.7L QCLB 4x4, G56, all stock for now.

CUMMINSGMC75 · 11-02-2009, 07:58 PM

ok now that i know where to get the turbo at a good price, what pipe do i use to connect everything? also where would i find said pipe?

__________________
In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

GGriff · 11-03-2009, 01:00 AM

Check out Source Automotive they sell complete kits or just parts. Source Automotive Performance Diesel

__________________
98 Dodge 2500 Club cab 4X4 5-sp #5 plate

,16*timing, BHAF, dumped silencer ring, big rig junkyard 5"exhaust. KDP fixed the HARD way

matterhorn · 11-03-2009, 11:29 AM

HT3B would be a good/cheap bottom charger as well and many have done that exact setup for quite a bit less than a kit ...

as for the s400 - check out Source Automotive's version of that setup - they have a lot of pics to help you out with the piping and such ... and the also supply individual parts to complete the build - VERY highly recommended .

__________________
1997 DRW NV5600 4WD - Banks Cat-Back - Banks "Big Head" WG - Banks Fuel Plate - Center Force Clutch - BD Exhaust Brake w/Press Gauge - 2" Leveling kit - Banks Boost and EGT gauges - Firestone Assist Bags... Need 4" Turbo/back exhaust badly... trade?

TheSh111t · 11-04-2009, 06:38 PM

Quote:

Originally Posted by sstockton

majestic turbo sells them with a 1.32A/R t6 housing for $585. Same spec on the Comp wheel, and turbine exducer.
index Dallas Turbo
Its under specials.

The the charger is very restrictive in the exhaust department. You will definitely want to address that with an external wastegate.
Sean

Are you refering to the stock charger being restrictive or are you saying that the 1.32 A/R s400 would be restrictive? I thought the 1.32 s400 would flow quite well, even give up some spool up time in order to get better top end flow. I'm assuming your speaking about his stock turbo may be restrictuve as a secondary (I agree that it will). Please correct me if I'm wrong.

__________________
1981 Chevy Short bed - Cummins swap Hoping for ~450 RWHP
1995 12v, NV4500, s362/s475 compounds, PDI manifold, #5 fuel plate, 181 Delivery valves,
5" turbo back, Mack plug, 60# springs, 4000 GSK, Timing @ 16*, 5x12 injectors.

CUMMINSGMC75 · 11-04-2009, 09:29 PM

i realize that the top stock turbo will be holding me back....what might be a good top charger to go with that s400, and where can i get one for a decent price?

__________________
In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

renopker · 11-04-2009, 10:01 PM

s300g for the top

__________________
98 12v,2wd twins,3:55,g56 6speed,elec fan clutch,100 hp sticks, 10 plate FF aFC fB,3gsk Valair ats,fluid damper,60#springs,o6 exhaust brake,High Idle,prime loc, 4"exh,piller mount

11-01-2009, 08:03 PM	#1 (permalink)
CUMMINSGMC75 Newbie Join Date: Oct 2009 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts CUMMINSGMC75's Truck Pics	what turbo to twin with the stock turbo on my conversion build, im thinking about putting twins on the truck, but want to do it on a budget, so whats a good turbo that can be used with the stock turbo that will supply enough air for about 500-600 hp? thanks __________________ In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

11-01-2009, 09:15 PM	#3 (permalink)
CUMMINSGMC75 Newbie Join Date: Oct 2009 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts CUMMINSGMC75's Truck Pics	thanks...i really dont know where to look though, what are some good brands for the s400. i have never done turbos before so this will be my first time working on them __________________ In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

11-03-2009, 01:00 AM	#8 (permalink)
GGriff Newbie Join Date: Jul 2008 Location: Doty, WA Posts: 12 Thanks: 0 Thanked 0 Times in 0 Posts GGriff's Truck Pics	Check out Source Automotive they sell complete kits or just parts. Source Automotive Performance Diesel __________________ 98 Dodge 2500 Club cab 4X4 5-sp #5 plate,16timing, BHAF, dumped silencer ring, big rig junkyard 5"exhaust. KDP fixed the HARD* way

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11-01-2009, 09:11 PM	#2 (permalink)
cbtoyz Cummins Fanatic Join Date: Aug 2007 Location: fortuna, ca. Posts: 185 Thanks: 0 Thanked 1 Time in 1 Post cbtoyz's Truck Pics	A standard S400 will work well, and can be had brand new for around 650 bucks if you know where to look. __________________ Colin-'06 QC, SB, 4x4- 853hp/1467 & 11.30@122mph. Thanks, Brad and everybody at Ponci's Diesel Center, Dave Goerend and everyone who helped along the way!

11-01-2009, 09:29 PM	#4 (permalink)
cbtoyz Cummins Fanatic Join Date: Aug 2007 Location: fortuna, ca. Posts: 185 Thanks: 0 Thanked 1 Time in 1 Post cbtoyz's Truck Pics	An S400 is a Schwitzer turbo, built by Borg Warner. They can vary a lot in size. For a primary charger you should look for something in the neighborhood of a 74/83/1.10 with a T-6 housing would be good. Here is a link to get you started. Bullseye Power Turbos __________________ Colin-'06 QC, SB, 4x4- 853hp/1467 & 11.30@122mph. Thanks, Brad and everybody at Ponci's Diesel Center, Dave Goerend and everyone who helped along the way!

11-01-2009, 09:44 PM	#5 (permalink)
CUMMINSGMC75 Newbie Join Date: Oct 2009 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts CUMMINSGMC75's Truck Pics	thanks, that site really clears things up __________________ In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

11-01-2009, 10:50 PM	#6 (permalink)
sstockton Cummins Fanatic Join Date: Dec 2008 Location: Sonoma, Ca Posts: 173 Thanks: 2 Thanked 21 Times in 21 Posts sstockton's Truck Pics	majestic turbo sells them with a 1.32A/R t6 housing for $585. Same spec on the Comp wheel, and turbine exducer. index Dallas Turbo Its under specials. The the charger is very restrictive in the exhaust department. You will definitely want to address that with an external wastegate. Sean __________________ 2000 2500 Reg. Cab 4x4. Built trans, Twins, Edge drag box, Sticks, Studs, cam, Gauges, etc... 09 2500 6.7L QCLB 4x4, G56, all stock for now.

11-02-2009, 07:58 PM	#7 (permalink)
CUMMINSGMC75 Newbie Join Date: Oct 2009 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts CUMMINSGMC75's Truck Pics	ok now that i know where to get the turbo at a good price, what pipe do i use to connect everything? also where would i find said pipe? __________________ In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

11-03-2009, 11:29 AM	#9 (permalink)
matterhorn Cummins Fan Join Date: Aug 2008 Posts: 32 Thanks: 0 Thanked 0 Times in 0 Posts matterhorn's Truck Pics	HT3B would be a good/cheap bottom charger as well and many have done that exact setup for quite a bit less than a kit ... as for the s400 - check out Source Automotive's version of that setup - they have a lot of pics to help you out with the piping and such ... and the also supply individual parts to complete the build - VERY highly recommended . __________________ 1997 DRW NV5600 4WD - Banks Cat-Back - Banks "Big Head" WG - Banks Fuel Plate - Center Force Clutch - BD Exhaust Brake w/Press Gauge - 2" Leveling kit - Banks Boost and EGT gauges - Firestone Assist Bags... Need 4" Turbo/back exhaust badly... trade?

11-04-2009, 09:29 PM	#11 (permalink)
CUMMINSGMC75 Newbie Join Date: Oct 2009 Posts: 20 Thanks: 0 Thanked 0 Times in 0 Posts CUMMINSGMC75's Truck Pics	i realize that the top stock turbo will be holding me back....what might be a good top charger to go with that s400, and where can i get one for a decent price? __________________ In planning stages, 2003 rc/lb gmc 2500 with 12v cummins conversion

11-04-2009, 10:01 PM	#12 (permalink)
renopker Cummins Nut Join Date: Aug 2007 Posts: 355 Thanks: 0 Thanked 3 Times in 3 Posts renopker's Truck Pics	s300g for the top __________________ 98 12v,2wd twins,3:55,g56 6speed,elec fan clutch,100 hp sticks, 10 plate FF aFC fB,3gsk Valair ats,fluid damper,60#springs,o6 exhaust brake,High Idle,prime loc, 4"exh,piller mount