Looking for fuel pump/injector suggestions. 08 6.2 Denali

[tgui]

I've got the OK from the wife to install a LSA (or Edelbrock E-Force) supercharger on my 6.2 Denali. I'm sticking with stock internals and NOT interested in setting records. Just a bit more fun. I'm thinking max 7 PSI?

- My Yukon is not flex fuel

- I will not be running E85

- Can anyone suggest a reasonably priced drop in fuel pump?

- Can someone suggest fuel injectors?


Thanks!

 

[Geotrash]

I've got the OK from the wife to install a LSA (or Edelbrock E-Force) supercharger on my 6.2 Denali. I'm sticking with stock internals and NOT interested in setting records. Just a bit more fun. I'm thinking max 7 PSI?

- My Yukon is not flex fuel

- I will not be running E85

- Can anyone suggest a reasonably priced drop in fuel pump?

- Can someone suggest fuel injectors?


Thanks!

OEM is the only reliable way to go for a fuel pump. Lots of people report problems with aftermarket pumps. It'll handle the added fuel delivery of a supercharger, AFAIK. I'll let one of the other guys with a blower advise you on the injectors. Congrats on the spousal approval!

 

[Chert_Detective]

I've got the OK from the wife to install a LSA (or Edelbrock E-Force) supercharger on my 6.2 Denali. I'm sticking with stock internals and NOT interested in setting records. Just a bit more fun. I'm thinking max 7 PSI?

- My Yukon is not flex fuel

- I will not be running E85

- Can anyone suggest a reasonably priced drop in fuel pump?

- Can someone suggest fuel injectors?


Thanks!

You're smack in the middle of what I like to call the "This could get out of hand quickly" zone.

What I mean by that is this:
Stock pump will handle the power
Stock injectors will not
Large ftermarket injectors will want a return style fuel system
Stock pump/hat is not set up for it
Stock regulator will not support aftermarket pump

So.... what do you do!?

With your "reasonably priced" comment in regards to fuel pump I would suggest the following.

First step is go with an LSA, a ported one with a reinforced brick and ZL1 lid. The injector length on an LSA will make aftermarket fitment easier, and get a set of Deatschwerks 16U-00-0065-8 65lb injectors.

Aaaand that's it! A 65lb injector will run fine on a dead headed stock pump fuel system. And because you're not concerned with running e85 and will be keeping boost low, the stock pump will be fine.

With keeping the stock pump you won't have to worry about modifying the fuel rail or getting an aftermarket rail in order to run a regulator and return style setup. On the off chance you do need a larger pump, it is very simple to take care of on the tank side, and on the engine side of things the LSA is friendly to a return style conversion so it will be a simple upgrade to take care of.

 

[tgui]

You're smack in the middle of what I like to call the "This could get out of hand quickly" zone.

What I mean by that is this:
Stock pump will handle the power
Stock injectors will not
Large ftermarket injectors will want a return style fuel system
Stock pump/hat is not set up for it
Stock regulator will not support aftermarket pump

So.... what do you do!?

With your "reasonably priced" comment in regards to fuel pump I would suggest the following.

First step is go with an LSA, a ported one with a reinforced brick and ZL1 lid. The injector length on an LSA will make aftermarket fitment easier, and get a set of Deatschwerks 16U-00-0065-8 65lb injectors.

Aaaand that's it! A 65lb injector will run fine on a dead headed stock pump fuel system. And because you're not concerned with running e85 and will be keeping boost low, the stock pump will be fine.

With keeping the stock pump you won't have to worry about modifying the fuel rail or getting an aftermarket rail in order to run a regulator and return style setup. On the off chance you do need a larger pump, it is very simple to take care of on the tank side, and on the engine side of things the LSA is friendly to a return style conversion so it will be a simple upgrade to take care of.

Thanks for the info!

I'm leaning more towards the lsa setup. I've got the funds to do it right. I just accept that I'll not be hanging with some of the big boys here.

Considering my non-flex fuel pump has 160k miles on it I might still replace it if only to get a good look at the lines and whatnot along the way.

I don't understand the dead head part. I have a return fuel system correct?

2009+ Flex fuel pumps seem to be recommended. Those have returns? Is there an oem part number?

Agree on deatchweks. I ran them on my meth injected, big turbo STi. They were so easy to tune compared to a cheaper set I suffered with.

 

[Chert_Detective]

Thanks for the info!

I'm leaning more towards the lsa setup. I've got the funds to do it right. I just accept that I'll not be hanging with some of the big boys here.

Considering my non-flex fuel pump has 160k miles on it I might still replace it if only to get a good look at the lines and whatnot along the way.

I don't understand the dead head part. I have a return fuel system correct?

2009+ Flex fuel pumps seem to be recommended. Those have returns? Is there an oem part number?

Agree on deatchweks. I ran them on my meth injected, big turbo STi. They were so easy to tune compared to a cheaper set I suffered with.

Because it seems you are a car guy with the sti comment, I'm going to make the assumption that you do know the difference between return and non return instead of explaining it and sounding condescending haha. If you are unfamiliar, no harm no foul I'd be more than happy to.

Our Denali's, I have an 08 as well, are sort of a hybrid between the two. It has a regulator, but it's incorporated into the hat/pump/bucket assembly that dumps directly back into the tank. From the tank forward could then be considered a conventional dead headed system with no return.

When you throw a larger aftermarket pump in there it overpowers that regulator and sends the pump control module into a frenzy, and will eventually not hold any pressure and not run.

 

[tgui]

Because it seems you are a car guy with the sti comment, I'm going to make the assumption that you do know the difference between return and non return instead of explaining it and sounding condescending haha. If you are unfamiliar, no harm no foul I'd be more than happy to.

Our Denali's, I have an 08 as well, are sort of a hybrid between the two. It has a regulator, but it's incorporated into the hat/pump/bucket assembly that dumps directly back into the tank. From the tank forward could then be considered a conventional dead headed system with no return.

When you throw a larger aftermarket pump in there it overpowers that regulator and sends the pump control module into a frenzy, and will eventually not hold any pressure and not run.

No ego here man. I've written my own tuning software, done lots of modding, but am only familiar with japanese sports cars. What I don't know about GM could fill a ******* library. Lol. My dangerous spot now is I don't know what I don't know so asking pointed questions is hard for me.

Ok what you wrote helps clear things up.

Last dumb question. Ive heard the flex fuel pumps flow more. If I were to get the whole assembly it would have the same integrated regulator I'm guessing. I'm not trying to stay fixated on this but I have an itch to dump the 160k mile pump. I've been bitten by old pumps in the past.

Actual last dumb question. My HPTuners supports tuning the FPCM. Is that a needed thing for me to learn more about?

 

[Chert_Detective]

No ego here man. I've written my own tuning software, done lots of modding, but am only familiar with japanese sports cars. What I don't know about GM could fill a ******* library. Lol. My dangerous spot now is I don't know what I don't know so asking pointed questions is hard for me.

Ok what you wrote helps clear things up.

Last dumb question. Ive heard the flex fuel pumps flow more. If I were to get the whole assembly it would have the same integrated regulator I'm guessing. I'm not trying to stay fixated on this but I have an itch to dump the 160k mile pump. I've been bitten by old pumps in the past.

Actual last dumb question. My HPTuners supports tuning the FPCM. Is that a needed thing for me to learn more about?

Tuning is out of my realm. I am not exactly sure what he changed on the controller, if anything, when I installed my fuel system. I do know that I did not remove the actual control module, nor did I change any wiring.

By all means, put a new oem pump in it, but obviously get an actual gm oem unit not an autozone or advance "replacement". As far as the flow difference between flex and non pumps, I am unsure.

I can tell you that I maxed a set of FAST 50lb injectors running e85 before I maxed my non flex pump. But then immediately maxed the non flex pump after switching to a 1200cc injector lol..

If you are interested I can get with my sales guy and see how they are looking on the release date of the intank prototype setup I've been testing for them. It's not cheap but aside from my rails, although they also are not oem, it's a full Deatchwerks fuel system including a drop in factory style bucket with a DW400, plug and play.

 

[tgui]

Tuning is out of my realm. I am not exactly sure what he changed on the controller, if anything, when I installed my fuel system. I do know that I did not remove the actual control module, nor did I change any wiring.

By all means, put a new oem pump in it, but obviously get an actual gm oem unit not an autozone or advance "replacement". As far as the flow difference between flex and non pumps, I am unsure.

I can tell you that I maxed a set of FAST 50lb injectors running e85 before I maxed my non flex pump. But then immediately maxed the non flex pump after switching to a 1200cc injector lol..

If you are interested I can get with my sales guy and see how they are looking on the release date of the intank prototype setup I've been testing for them. It's not cheap but aside from my rails, although they also are not oem, it's a full Deatchwerks fuel system including a drop in factory style bucket with a DW400, plug and play.

Once again, sooo many thanks!!

If I go bigger, badder, and built motor I'll hit you up about that fuel pump.

 

[Chert_Detective]

Once again, sooo many thanks!!

If I go bigger, badder, and built motor I'll hit you up about that fuel pump.

Shoot that's all stock bottom end N/A powaaa

 

[Foggy]

The flex fuel pump and flex injectors will handle the extra fuel required..
On my 14, edelbrock recommends it.. Just don't use e85 anymore.

I had a shop custom tune mine.. but they did a horrible job.... I wish
that I had ponied up the extra $500 and just bought the "tuner" with
the EForce SC directly from them- it's just a diff part #... Then , maybe,
did some custom tuning later on.

The MAP/ TMAP signal is different from stock and has to be modified to even
get it to start up.
I get about 5-6 psi on the boost gauge on mine and i even changed out to
1 size smaller pulley on the EForce SC
Mine is running too rich right now and the tuner had to pull my timing waaay
down to avoid knock.. But that's another can of worms.
I've purchased the HP Tuners Pro program to play with it myself, but
I'm not super great with with the software/computer... I know what I want/need,
just not sure how to get there,,,, yet