need help picking twins - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 17 (permalink) Old 02-18-2009, 11:09 PM Thread Starter
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Exclamation need help picking twins

I wanna do a twin set up. I'm currently running a single hx40. The hx40 doesn't have much lag at all now. I was considering doing a set up with the hx40 up top and maybe a ht3b on the bottom. I know people running that making 80 lbs of boost. Is that the best way to go oe should I do something a little bigger like adam cornell with a s362 and a s480 which makes 100 lbs. I just don't know how much lag that will have. I was maybe thinking of using a hx50 up top with something else on the bottom but I just don't know. Its a street truck that I drag race sometimes . I don't mind some lag but I don't wanna have to sit and wait awhile for it to light either. Any help would be great. Thanks for your input.

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
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post #2 of 17 (permalink) Old 02-19-2009, 10:33 PM
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whats the budget? 62 or 64 s480 combo with the 1.32 a/r would probably be the best set up, but thats a little pricey. The hx40 ht3b combo works and would be good on a budget, but I think that the other combo would work better.
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post #3 of 17 (permalink) Old 02-20-2009, 12:43 AM Thread Starter
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What should I use to spool up the s480, the hx40 or something else. And what would the differences be between wheels other than size.

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
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post #4 of 17 (permalink) Old 02-20-2009, 01:12 AM
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I turned 21
Newer design = more air for size and quicker spool up

Logan
1995 12 valve Cummins 6.0L, Air Dog 150, no fuel plate, AFC tuning, 024 DV's, 4K GSK, 18* timing, SDX 5x.014 injectors, Hamilton 181/210 cam and HD pushrods, Stage 2 Port job, 5 angle valve job, 60lb valve springs, ARP studs, O-ringed head, .020" over head gasket, coated pistons, balanced bottom end, Fluidampr, PDI exhaust manifold, homemade intake manifold, HE351cw Common Rail turbo and 50mm wastegate.
Drive Train: 13" Valair clutch [email protected], 5 speed, 4x4, 3.55 diffs, on 285/75 R16s

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post #5 of 17 (permalink) Old 02-20-2009, 02:55 AM Thread Starter
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So a 64mm s480 would be better than the 62mm. Is the 64 harder to spool than the 62. And what should I use to spool it. Is the hx 40 enough.

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
smokin24valve is offline  
post #6 of 17 (permalink) Old 02-20-2009, 04:21 AM
 
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The HX-40 over 3B is an old, but tried and true set up. I know of a few 24V making 650+hp on these twins.

If can afford more, then jump up to an S300/S400 combo. Many variations for spool and power.

I have run and S300g over S400 and a 62 over S480. Both spooled well and towed great. I would say unless you are going to run huge injectors and get a Monster pump, then just stay with the S400. Any SO VP does not have the fuel to justify an S480.

Also, you noted 100psi with a 62 over S480. More PSI is not always a good thing. My twins ran best and had the lowest temp at close to 60-65psi. Going over with the same fueling just made EGT's climb.
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post #7 of 17 (permalink) Old 02-20-2009, 01:35 PM Thread Starter
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I did do a p pump conversion with a 180 pump. I'm grinding the fuel plate the rest of the way down soon and sliding it the whole way. I also have 4g springs which I am considering 5gs or the race springs from dynomite and I'm currently running a set of 200 hp injectors.

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
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post #8 of 17 (permalink) Old 02-20-2009, 03:20 PM
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what are your plans with the truck? Thats what needs to be known. If you get too crazy it's not going to be very street friendly

01 quad cab 4x4, edge drag comp, 4" exhaust, fass 150, 250 ddps, Jefferson State compounds 683hp so vp 11.91. AMSOIL front to rear. now back to stock 95 fummins in the works
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post #9 of 17 (permalink) Old 02-20-2009, 03:55 PM Thread Starter
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Its a daily driver that I also drag race and dyno. Id like to see around 650 - 750 hp.

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
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post #10 of 17 (permalink) Old 02-21-2009, 02:18 AM Thread Starter
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is the k31 pretty much the same as a s480. i heard of people running a k31 with a s300 sized from a 62-66mm

My truck:
1999 Dodge 24 Valve Cummins
P pump conversion with a 180 pump
Pump doesn't have a fuel plate, 4g springs, & full cut dv's, no afc, ect..
.093 fuel lines
Air Dog 165
custom ground cam
mahle pistons with .050 valve reliefs
balanced rotating assembly
8 x 11 injectors
ported head with 60lbs valve springs and 12mm studs
Pro 52
Polydyn header
stage 5 east coast diesel bullit automatic trans.
triple disk dunrite torque converter
4.10 gears
klienn train horns
Nubers with the twins and without header
603hp 1157tq
12.7 quarter mile (then ht3b blew again)
smokin24valve is offline  
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