Max HP with plenty of air for DDP4's?????
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Joined: May 2005
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From: Katy, TX off north Mason Road.
Max HP with plenty of air for DDP4's?????
Just curious what kind of power the DDP4's are good for asuming you have a large enough turbo, maxed out fuel screw, maxed timing, and 14psi feeding the VE at all times. I know some people have made an extremely somkey 390whp but I'm looking for a light haze burn at WOT kinda power numbers.
I run the regular DDP4s, a maxed VE w/DennyT pin timed at about 2.5mm. 60ish psig boost holds the WOT EGTs at about 1300*F. As such my heap's good for 405/840 on #2 only (automatic transmission).
Rather than stomping the pedal, rolling into it presents with a decently clean exhaust. Certainly NO heavy Cop'calling smoke screens by a long shot. Don't get me wrong, it is a '93 Cummins with the lower pop pressure VE.
I've got my OEM star-where run up as tight as I can without bind, the smoke screw all the way out. Both to keep low/no boost as smoke free as is possible. I've got an idle boost fooler that I'm gonna put on the AFC line and see if I can clean it up even more.
We'll see.
Rather than stomping the pedal, rolling into it presents with a decently clean exhaust. Certainly NO heavy Cop'calling smoke screens by a long shot. Don't get me wrong, it is a '93 Cummins with the lower pop pressure VE.
I've got my OEM star-where run up as tight as I can without bind, the smoke screw all the way out. Both to keep low/no boost as smoke free as is possible. I've got an idle boost fooler that I'm gonna put on the AFC line and see if I can clean it up even more.
We'll see.
Based on the injector chart at 1stGen.org, they're a little smaller in terms of flow than a regular POD ~ http://1stgen.org/viewtopic.php?t=13...r=asc&start=60
But perhaps a better bore than flow-honing, not sure there. They are definitely cleaner than PODs for sure.
But perhaps a better bore than flow-honing, not sure there. They are definitely cleaner than PODs for sure.
Well, how about this . . . .
An HX35/Hybrid 14WG set at 38psig boost. Same VE set up but running a home-cut fuel pin. 50/50% W/M . . . .
Note the smoke as it runs . . . http://www.youtube.com/watch?v=XsSAqq--C4U
Did I mention "Stupid Hot!" ?
MUCH cleaner and cooler with the twins.
An HX35/Hybrid 14WG set at 38psig boost. Same VE set up but running a home-cut fuel pin. 50/50% W/M . . . .
Note the smoke as it runs . . . http://www.youtube.com/watch?v=XsSAqq--C4U
Did I mention "Stupid Hot!" ?

MUCH cleaner and cooler with the twins.
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stock 1st gen inj - 6x.009" = .000380" total cross sectional area
2nd gen 215 tips - 4x010 = .000314(17% smaller than stock)
non ic inj - 4x12 = .000452 (19% larger than ic inj)
185's = smaller than stock
190's = smaller than stock
230's = ?
300's = ?
ddp stg III = 50 LPM (liter per minute) 5 hole extrude hone inj
330's - 5x11 = .000474 (20% larger than stock)
2nd gen 370's - 5x12 = .000565 (48% larger than stock)
ddp stg IV = 55 LPM (only 10% larger than stg III's) 5 holes <.013
pods - 4x14 = .000615 (62% larger than stock)
2nd gen 435's - 5x014 = .000769 (twice as large as stock)
2nd gen 215 tips - 4x010 = .000314(17% smaller than stock)
non ic inj - 4x12 = .000452 (19% larger than ic inj)
185's = smaller than stock
190's = smaller than stock
230's = ?
300's = ?
ddp stg III = 50 LPM (liter per minute) 5 hole extrude hone inj
330's - 5x11 = .000474 (20% larger than stock)
2nd gen 370's - 5x12 = .000565 (48% larger than stock)
ddp stg IV = 55 LPM (only 10% larger than stg III's) 5 holes <.013
pods - 4x14 = .000615 (62% larger than stock)
2nd gen 435's - 5x014 = .000769 (twice as large as stock)
Thread Starter
Registered User
Joined: May 2005
Posts: 2,088
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From: Katy, TX off north Mason Road.
So there good for between 400-420whp I'm guessing. I guess I could always make up for the single turbo with the N2O. lol Not that its any easier on the HG than twins. lol
DDP dosen't call the stage III's, stage IV's any more, They are call what the flow,
Part: #DDP 899355LPM so called 80 hp injector or stage IV's are called now 55 LPM injectors
Part: #DDP 899350LPM so called 40 hp injectors or stage III's are called now 50 LPM injectors
I run the 50LPM injectors in my truck, TLRMAN has the 55's and both set run real clean.
Part: #DDP 899355LPM so called 80 hp injector or stage IV's are called now 55 LPM injectors
Part: #DDP 899350LPM so called 40 hp injectors or stage III's are called now 50 LPM injectors
I run the 50LPM injectors in my truck, TLRMAN has the 55's and both set run real clean.
DDP dosen't call the stage III's, stage IV's any more, They are call what the flow,
Part: #DDP 899355LPM so called 80 hp injector or stage IV's are called now 55 LPM injectors
Part: #DDP 899350LPM so called 40 hp injectors or stage III's are called now 50 LPM injectors
I run the 50LPM injectors in my truck, TLRMAN has the 55's and both set run real clean.
Part: #DDP 899355LPM so called 80 hp injector or stage IV's are called now 55 LPM injectors
Part: #DDP 899350LPM so called 40 hp injectors or stage III's are called now 50 LPM injectors
I run the 50LPM injectors in my truck, TLRMAN has the 55's and both set run real clean.
They should just give them in # of holes and hole size and not give a HP rating to them as the HP you get from them depends on so many variables!!
Aaron
You're correct on the veriables, but it stands the more fuel flow from more lpm = more HP if you use it correctly.
Thread Starter
Registered User
Joined: May 2005
Posts: 2,088
Likes: 0
From: Katy, TX off north Mason Road.
I wish I knew the cc's though and not the LPM. With cc's you can make 2hp for every one cc of fuel. So if they're 250cc injectors you could make 500hp if everything was right.


