Lets discuss Injectors, big fuel

[KEVINL]

Lb7 and LLY's don't have the piston problems of the LBZ/LMM

 

[LBZrcks]

SikDmax running 500hp on stock turbo stock sticks McRat tuning - pop.

Simons buddies LMM above similar story - pop.

Henrys was stock motor 4094 turbo I beleive - pop.

Chad Alligator was stock- pop.

Tommy had dual fuelers, cheetah but pop.

Motohed stock stock pop.

Who else? Theres tons more. Several different tuners and styles of tuning.

A little more accurate

 

[LBZrcks]

Lb7 and LLY's don't have the piston problems of the LBZ/LMM

Sure they do, just not as many

 

[KEVINL]

Sure they do, just not as many

Right...........


That must be why they are used in built motors

 

[LBZrcks]

Right...........


That must be why they are used in built motors

Yes, after they have the lips machined off.

 

[gmduramax]

Cracked one piston three others were on there way out

How many miles at this level-

25000 miles at 640hp

#1- Injectors- stock

#2- PW- 3000

#3- Timing- never went over 30

#4- Fueling- stock CP3

#5- Turbo stock

#6- Motor built or not- stock

#7- LIft Pumps Airdog 150

 

[sweetdiesel]

How many miles at this level- 80 000 LLY

#1- Injectors- stock

#2- PW- 3300 depends what day highest was 4000 untill raw fuel shot out exhaust

#3- Timing- 32 depends what hour of the day

#4- Fueling- 2xcp3s for 5k ish

#5- Turbo HTT for around 5k

#6- Motor built or not-not

#7- LIft Pumps KDs


Truck ran 100s of different tunes and shared a lot of these with Larry
truck died after towing 1000 miles on a 2200 pw tow tune the next day i switched back to the race tune and pop it was running very good before it died

Sorry Todd i edited your post instead of replying to it

 

[SIKDMAX]

Crap you blew your motor gmduramax?

 

[gmduramax]

Crap you blew your motor gmduramax?

yea july 5th

 

[Rhall]

Can we add broken cranks to this too?

 

[TNRGreene]

Can we add broken cranks to this too?

Yes but that would fall under "what happened"

 

[JD Dave]

Just for the record, Brayden didn't push bigger injector's on me. I knew I wanted them when I called. I only wanted 40% bigger and he did tell me just to go to 60 though. I don't know much about motors but from what I've read injectors were a must when I went to a bigger turbo, didn't matter who I bought the turbo from.

 

[mde]

To much timing ==> high cylinder pressure ==> cracked piston

To much PWM ==> to long of a burn cycle ==> melted piston

Find the middle way and you are fine ...

 

[dmaxvaz]

to much timing ==> high cylinder pressure ==> cracked piston

to much pwm ==> to long of a burn cycle ==> melted piston

find the middle way and you are fine ...

where is the middle? Too much to some people is not enough for others and vise versa

 

[mde]

where is the middle? Too much to some people is not enough for others and vise versa

That why we spend hours and hours on the engine dyno to find that out ... sometimes to late ...but I think we figured that out now.

 

[dmaxvaz]

that why we spend hours and hours on the engine dyno to find that out ... Sometimes to late ...but i think we figured that out now.

you are right, but sometimes conditions on a dyno arnt the same as real life street or strip driving. Do you tune them with a cylinder psi probe? There is mixed results on tuning on how to get to a desired hp # like lets say 650hp; turn pw higher, timing, rail psi. Another is higher pw low timing, higher rail psi. Put injectors in, lower pw, lower timing, higher rail psi. All these ways will give you the desired # mentioned above, so wheres the middle:d

 

[dmaxvaz]

just to open a bit your eyes ...

By 1800 bar pressure, 4000 rpm, 30 degree timing ...

You actually spray from 15 degrees btdc and 71 degree atdc in the cylinder and spray totally 86 degree In there ... That a looong time of fuel going in to the cylinder which is a lot of heat.

thanks volker, send me that pm

 

[mde]

you are right, but sometimes conditions on a dyno arnt the same as real life street or strip driving. Do you tune them with a cylinder psi probe? There is mixed results on tuning on how to get to a desired hp # like lets say 650hp; turn pw higher, timing, rail psi. Another is higher pw low timing, higher rail psi. Put injectors in, lower pw, lower timing, higher rail psi. All these ways will give you the desired # mentioned above, so wheres the middle:d

You are pretty close with engine dyno testing. Because we used all the time the same products to run them and go slowly up to the point we want. In the end we had to fine tune it on the vehicle/boat/streamliner but you learn a lot direct on the engine dyno what happens. When you tune it on the drag track or pull track ... it might me to late for some changes, on the engine dyno you can concentrate on the main values, egt, boost, drive pressure, oil pressure, fuel delivery, water temp, etc.

 

[mde]

thanks volker, send me that pm

I will ...

 

[JD4440]

Cracked one piston three others were on there way out

640 on stock turbo/ injectors ? Is that with spray ?