new turbo hot and laggy

[oldhippie66@comcast.net]

sorry i started this in intro section, i need advice , truck is 01 cummins 4x4 extended cab, current mods are edge juice 4in exhaust afe intake horn, fass 150 built trans billet input shaft tripple disc converter,borgwarner 62/68/12sxe turbo, it has either rv 275 or 75 hp injectors. truck is very smoky with any pedal input under 1700 rpm,could i get some advice please

[CTcummins24V]

Turbo is a little big for rv275s, no surprise it’s laggy in the lowers rpms. Also, with larger injectors, it could be smokey too till the turbo lights. 

 

Smokey with edge off?

 

I think you said you already did a boost leak test?

 

A low stall torque converter could also play a factor.

[Mopar1973Man]

I'm running a 60/60/12 Hybrid HX35/40 turbo which would fit your application just about perfect...

[oldhippie66@comcast.net]

it is smokey on all settings just less on lower settings , yes boost leaks check ok, it is a low stall converter,which would be best solution injectors , tuner, smaller turbo

 

this is new turbo replaces a afe bladerunner which had crazy high drive pressure, guess i went overboard the other way

 

[Me78569]

get some 7 x .010 injectors.  rv275s are much to small to get the turbo going without using a ton of duration.    tuning would help, but it wont overcome a lack of mechanical injection

[Mopar1973Man]

15 minutes ago, Me78569 said:

get some 7 x .010 injectors.  rv275s are much to small to get the turbo going without using a ton of duration.    tuning would help, but it wont overcome a lack of mechanical injection

 

That 7 x 0.010 injectors and a Quadzilla would be the awesome setup on your current turbo. You'll be able to defuel the Quadzilla enough to build boost and get the turbo lit then cut it loose with a wire tap and extra fuel. 

[oldhippie66@comcast.net]

injector recomendations, and would they work for a while until i can get quad

 

[Youngblood24v]

Get ahold of @Haley speed innovation for injectors. He will set you up at a great price 

[Mopar1973Man]

The two I would use for injectors have been Vulcan Performance and Diesel Auto Power. 

[oldhippie66@comcast.net]

sac or voc dislike smoke, reliabilty is issue at this level a few more hp not that important

 

[Mopar1973Man]

52 minutes ago, oldhippie66@comcast.net said:

reliabilty is issue

 

Exactly what my design is all about. I don't care to make big HP. I want a clean daily driver. Comparing the Edge Comp (or Edge Juice) to the Quadzilla you'll find the fuel control is way better on the Quadzilla allowing for smoke-free tunning. Then timing to get the MPG's up where they belong. The other factor since you can set fuel BELOW stock level you can reduce the amount of stress on the driveline components where Edge products don't have this ability.

 

7 x 0.0085 DAP VCO Injectors

HX35/40 (60/60/12) Hybrid Turbo

Quadzilla Adrenaline

Edited July 18, 2018 by Mopar1973Man

[trreed]

VCO is the nozzle you're wanting.

[oldhippie66@comcast.net]

i would like to thank everyone for the advice ,really helpful group, again tks to everyone.

[SilverMoose]

5 hours ago, oldhippie66@comcast.net said:

i would like to thank everyone for the advice ,really helpful group, again tks to everyone.

You can't go wrong here. The guys here have tons of great knowledge. Myself excluded of course.

 

L8tr

D

[Mopar1973Man]

I think the common factor is everyone just jumps out and buys parts because everyone is buying this or that. Truthfully you have to build to fit all your hardware. Like you can just go out and buy a big turbo thinking you going to make a gain. Turbo is based on the amount of fuel being burned. Then tuners and timing also affect the turbo behavior. I've was taught long ago with V8 Mopar's you can't just take a stock 400 CID with a 2 barrel Holley 600 CFM carburetor and drop on a 1050 CFM 4 barrel. There has to be supporting mods to make that carburetor function its best. That brings us around turbo, injectors, and tuners. This is only the surface. Then you got to factor in tires size, gear ratio, transmission type, lift kits and truck common purpose. Still to this day I'm slowly been working the power up a little at a time and find what is weak or what needs to be upgraded. 

 

Still to this day I see people jump out and buy a huge turbo, set of large injectors and a tuner. The lift kit the truck and put on 35" tires and then wonder why it smokey, breaking driveline parts and has no MPG now. 

[Clunk]

With all those supporting mods, the engine operating rpm will have to be increased. 

The off-idle power is very poor while trying to spin up a big compressor & turbine, even with lots of fuel.

 

 

 

[mopar440cu]

On 7/23/2018 at 8:18 PM, Clunk said:

With all those supporting mods, the engine operating rpm will have to be increased. 

The off-idle power is very poor while trying to spin up a big compressor & turbine, even with lots of fuel.

 

How would he increase the engine operating rpm range?

[Mopar1973Man]

Pretty simple smaller tires or switch to higher gear ratio 3.55 to 4.10.

[Clunk]

And run up a little more rpm before upshifting.

Installing a stock hX35 puts good drivability and towing back in the truck.

[Dieselfuture]

I am now waiting for my tires to wear out so I can downsize to 265, I know it's still tall but should see improvement over 285. Maybe I'll just sell them and get a set sooner . For what I do, I'm not going any smaller, not yet at least.