Engine/Transmission (1998.5 - 2002) Again with the EZ boost elbow (no it is a different thread I promise!)

[IWeiny]

Ok so here is my take on the EZ boost elbow.



I have seen many posts and web sites about the elbow and I want to present my thoughts and get corrected if I am wrong.



It seems to me the EZ changes 2 things, timing and fuel quantity. EGTs aside, if the fuel is increased wouldn't the air need to be increased to get more power? Therefore the boost elbow should be installed. I know there are many who like smoke but smoke is just unburned fuel == wasted money at the pump.



So why would the EZ box work "equally" well with or without the elbow. I would think one would not get as much power increase without it. I know you would get the timing benefits, but does the stock engine run lean? So more fuel can be injected with the stock boost provided?



Thanks,

Ira

 

[klaybus]

If I'm not mistaken, without the boost elbow you will set off high boost codes & your truck can go into limp mode... . With an EZ & boost elbow your boost will increase to keep your EGT's down, thus creating more usable power. This coming from someone without an EZ until I can get my DTT paid for. I'm sure someone will correct me if I'm wrong.



Clay

 

[MGordon]

The boost elbow keeps the wastegate from opening. The EZ itself is supposed to keep the engine from setting codes. I say supposed to because mine didn't and I now have over boost codes.

 

[IWeiny]

MGordon, Did you do the boost elbow?

I don't think the boost elbow will keep codes from appearing. If anything I would think it might cause them. It does cause the waste gate to open later causing more boost.



I would think that without it the codes would not be set as there would still be stock boost. I suppose the over fueling of the engine might cause higher boost but without disabling the wastegate I don't know how one would get above stock? That is kind of my question?



Thanks for the responses guys,

Ira

 

[AggieJustin]

If you install the EZ without the boost elbow, you might see a little bit higher boost pressure due to the more aggressive fueling. But you'll be limited by your wastegate opening at stock pressures. So you'll miss out on the high boost fueling of the EZ.



If you only install the boost elbow, then you'll end up with over-boost codes since you're delaying the opening of the wastegate but don't have any electronics to keep the computer from seeing the higher than stock boost. That's part of the function of the EZ. It takes the signal from the MAP sensor and clips the value if it's over stock before sending it to the computer. This way, the computer never sees higher than normal values. But the EZ knows exactly what is going on.



When you put them both in, you'll get the higher boost pressures (without the computer seeing them and setting codes) and you'll also get the added fueling that the EZ provides in the higher boost ranges. Also, you should be seeing lower EGTs since you are feeding more air.



JM

 

[jwilliams3]

Ira,

Your Edge EZ box is programmed to fool the ECM into not setting boost codes, no matter what.



The Boost Elbow acts as a restriction to prevent your wastegate from opening until around 35-40 psi on a stock turbo.

Eventually if you did push enough drive pressure through the stock turbo elbow the wastegate would open and you could still have boost over 26psi.



On a turbocharged diesel engine, more fuel=more exhaust volume. Exhaust volume/drive pressure powers the turbo charger.



--Justin

 

[RBSOB]

Correct!

Ira, Justin & Justin are right, EZ alone will increase fueling and timing and prevent over boost codes from being set. The boost elbow will prevent the wastegate from opening at stock, pre-set pressure and allow for higher boost with the additional fuel. You can run EZ with out boost increase but don't install boost elbow with out EZ first, or you will get codes and de-fueling. Thinking of keeping up with those Fords, are you? Jim G.

 

[Sticks]

Originally posted by MGordon

The EZ itself is supposed to keep the engine from setting codes. I say supposed to because mine didn't and I now have over boost codes.

Same problem here, and I got a 0216 to boot. Now I have a replacement Edge EZ sitting in a box right on top of my AFE filter in the garage until I get this injection pump timing problem figured out.

 

[Sarge]

No codes!!

I took mine out and ran it hard right up to the point it defueled. #25-#26 boost, 90mph+, and screaming acceration. Next morning checked for codes... ... ... . nothing. I installed the Edge, AFE filter, and gauges all in the same week. :--) Sarge

 

[crawler]

Back to the original question. Because the EZ is so mild it would most likely make the same amount of power with or without the boost elbow. The truck would however have slightly higher exhaust temps. Now with the elbow the truck will have roughly the same amount of power, yet the exhaust temps are the same or sometimes(on some trucks) lower than stock. At 18-19psi there is enough air to make all of the power that an otherwise STOCK truck with an edge EZ is capable of; however the elbow allows it to run cooler.



Now all of this is assuming we are dealing with a relatively stock truck. I. E. no other power adding enhancements(injectors,fueling box, etc... )

 

[jwilliams3]

Back when I had just an Edge EZ on the truck. After, I added the boost elbow, there was a noticeable increase in power.

In my opinion.



--Justin

 

[BPINE]

Originally posted by crawler

Back to the original question. Because the EZ is so mild it would most likely make the same amount of power with or without the boost elbow. The truck would however have slightly higher exhaust temps. Now with the elbow the truck will have roughly the same amount of power, yet the exhaust temps are the same or sometimes(on some trucks) lower than stock. At 18-19psi there is enough air to make all of the power that an otherwise STOCK truck with an edge EZ is capable of; however the elbow allows it to run cooler.



Now all of this is assuming we are dealing with a relatively stock truck. I. E. no other power adding enhancements(injectors,fueling box, etc... )

This IMO is the correct answer.

 

[crawler]

Compliments are COOL

Blair I'll take that as a compliment. Oo.

 

[BPINE]

Re: Compliments are COOL

Originally posted by crawler

Blair I'll take that as a compliment. Oo.

When you are right you are right.

 

[Diesel Freak]

Originally posted by IWeiny

but does the stock engine run lean?

All diesel engines run lean. It is the nature of the beast... at least for us mildly BOMBed folks.

 

[JyRO]

Always learning...

I took the EZ box off when I took my truck to the dealer. For those of you over-ethical types, I was having some repair done to the tailgate, not any engine work of course (our engines are perfect ). They likely never opened the hood. But I didn't want them knowing anything they didn't need to know.



However, when I took the EZ off, I didn't put the stock elbow back on the turbo. I didn't realize that running that way may set codes. Well, you learn something everyday, I guess. Most of the way to the dealer and back I grannied it, so I probably never exceeded the stock boost anyway. But seems I may have got on it a couple times. I'll check my codes and see what I have. Thanks for the info guys!



- JyRO