[KingLT1]

Originally Posted by 2016SSimpson

I just added the aux kit for now.

how does your fueling look? How much boost? what fuel?



If you guys would, please list your full fuel system, what type of fuel, and how much boost. This is all important information.

[DatBrotato]

If someone is running nitrous & no boost then then the hobbs switch on the SMG wouldn't work, correct?
The DSX kit would be the only way to go.

Unless you could wire it to the ecu.

[KingLT1]

I thought it's referenced to fuel pressure.

Edit*

I am incorrect...it's referenced to boost. So yeah you might need the DSX for Nitrous.

[Drsagacity]

Originally Posted by KingLT1

Currently researching my fuel options for running full E85 on 8-9psi with stock cam in my SS. I know the popular setup has been full LT4 high and low side for a LT1, but it will be near or at it's limits for my requirements on E85. I want to have plenty of fuel. I am thinking LT4 injectors, LPE big bore, and SMG low side. I don't want to run meth.

It seems to me that if you are ok with tapping the fuel tank, adding a Aux low side will support more power then a ZL1 in-tank with a Voltage booster and the price is not much different. Install time is quite a bit less with the SMG setup too. Does this sound correct?

Curious to hear if anybody is running a similar setup on e85 and stock cam...how much power did you make?

I probably have something twisted so please don’t flame me if this is stupid.

Won’t you be limited to how much fuel you can put in without increasing the cam fuel lobe? If I have a cam letting in 30% more fuel and am not running out of fuel on E...then I am not sure how a stock cam could push it to the edge? I am running 8psi now and am planning to move to 10psi, but want to dyno this setup first.

In fairness my local gas stations appear to have e85 that is really e70. . .so that may also be a factor.

[KingLT1]

Of course I will be limited by the stock cam lobe but the LPE big bore 30% more volume over the stock pump and 10% more over the LT4 which will help some.

ADM performance recently made 680whp with a SS 1LE using the LT4 1.7 supercharger @ 9psi, LT4 injectors, and LPE big bore pump on E85. The big bore gave them another 60whp of fuel headroom over the LT4. They were capped at 620whp prior.

I am debating weather or not I want to tap the tank for SMG auxillary or just run a ZL1 with BAP or both. The SMG setup is good for 930whp on E85 according to the guys over there. Also much easier to install.

[solobaric]

Very interesting

[Drsagacity]

Originally Posted by KingLT1

Of course I will be limited by the stock cam lobe but the LPE big bore 30% more volume over the stock pump and 10% more over the LT4 which will help some.

ADM performance recently made 680whp with a SS 1LE using the LT4 1.7 supercharger @ 9psi, LT4 injectors, and LPE big bore pump on E85. The big bore gave them another 60whp of fuel headroom over the LT4. They were capped at 620whp prior.

I am debating weather or not I want to tap the tank for SMG auxillary or just run a ZL1 with BAP or both. The SMG setup is good for 930whp on E85 according to the guys over there. Also much easier to install.

Makes sense.

I was told the cam should be considered part of the fuel system upgrade, but that will allow me to safely run 750whp.

I am surprised the fuel pump could make that much of a difference because if I see the numbers correctly on my setup we will run out of injector time before the in tank pump is out of room (running e at 750whp or race fuel north of 800whp). When does the HPFP run out of capacity? Based on ADM results, I assume the hpfp outlasts the low side. What about injectors? Like I said, I thought we would see them cap out before the lpfp...

Btw - no argument from me, just trying to understand because there seems to be so much conflicting information out there, I love to understand what is real.

[2016SSimpson]

Originally Posted by KingLT1

how does your fueling look? How much boost? what fuel?


Solid so far, the low side is what seems to fall off 1st. Skid mark has a shop car making over 1k whp on his system and said his low side held the whole time. did mention the high side he's running ran out of steam in the 800's and had lt4 injectors, lobe, and the lpe pump. said they added meth to achieve the rest


If you guys would, please list your full fuel system, what type of fuel, and how much boost. This is all important information.

I am just the aux low side and injectors so far. I make upper 6's hp so far on e85. that may be all I do though. (stock bottom end)

Originally Posted by KingLT1

I thought it's referenced to fuel pressure.

Edit*

I am incorrect...it's referenced to boost. So yeah you might need the DSX for Nitrous.

yes it references boost but is adjustable, I was told by another guy that you can likely run these systems constantly as well since its a quality pump and shouldn't have any issues.

Originally Posted by Drsagacity

I probably have something twisted so please don’t flame me if this is stupid.

Won’t you be limited to how much fuel you can put in without increasing the cam fuel lobe? If I have a cam letting in 30% more fuel and am not running out of fuel on E...then I am not sure how a stock cam could push it to the edge? I am running 8psi now and am planning to move to 10psi, but want to dyno this setup first.

In fairness my local gas stations appear to have e85 that is really e70. . .so that may also be a factor.

you will absolutely run out of high side before the low side with an aux system will, even on a build high side. SMG's built high side was done at 8xx something on corn but his low side was still strong.

Originally Posted by Drsagacity

Makes sense.

I was told the cam should be considered part of the fuel system upgrade, but that will allow me to safely run 750whp.

I am surprised the fuel pump could make that much of a difference because if I see the numbers correctly on my setup we will run out of injector time before the in tank pump is out of room (running e at 750whp or race fuel north of 800whp). When does the HPFP run out of capacity? Based on ADM results, I assume the hpfp outlasts the low side. What about injectors? Like I said, I thought we would see them cap out before the lpfp...

Btw - no argument from me, just trying to understand because there seems to be so much conflicting information out there, I love to understand what is real.

you'll be safe to 7xx+ on fuel, but will your internals?

[KingLT1]

Originally Posted by 2016SSimpson

I am just the aux low side and injectors so far. I make upper 6's hp so far on e85. that may be all I do though. (stock bottom end)

Wow...you are upper 6's with the stock HPFP on E85? What percentage of E?

[Drsagacity]

Originally Posted by 2016SSimpson

I am just the aux low side and injectors so far. I make upper 6's hp so far on e85. that may be all I do though. (stock bottom end)

yes it references boost but is adjustable, I was told by another guy that you can likely run these systems constantly as well since its a quality pump and shouldn't have any issues.

you will absolutely run out of high side before the low side with an aux system will, even on a build high side. SMG's built high side was done at 8xx something on corn but his low side was still strong.


you'll be safe to 7xx+ on fuel, but will your internals?

I have forged pistons. If I am going to go beyond 800whp for the street, I will go ahead and add rods with ARP bolts this winter, I suspect I will stay in the 750whp range (e85).

[DatBrotato]

Originally Posted by KingLT1

I thought it's referenced to fuel pressure.

Edit*

I am incorrect...it's referenced to boost. So yeah you might need the DSX for Nitrous.

Yeh.
On second thought, it would probably make more sense to go with a dedicated fuel setup for nitrous.
It's only a bit more than the SMG kit, and there's the added ability of running whatever fuel I want, and not cutting into stock fuel lines or the tank.

[KingLT1]

That's what I would do for nitrous.

[Rlhay2]

For those curious about the SMG fuel system:
https://skidmarkgarage.net/shop?olsP...ry-fuel-system

[Drsagacity]

Originally Posted by Rlhay2

For those curious about the SMG fuel system:
https://skidmarkgarage.net/shop?olsP...ry-fuel-system

This looks awesome, but I guess it isn't necessary if we have already added the ZL1 in-tank pump and the BAP because the next bottleneck is the HPFP, right? This would have been an option instead of the in-tank pump. Correct?