[clg82]

Just like the title says. I’m getting a magnuson installed in March, I have been speaking with a local tuner about looking over the stock CARB tune that comes with it to get the most out of the magnuson and he suggested going e85 as well. I thought with the magnuson I would be at or near the top of the fuel for the ZL1. Thoughts? Can i run e85 and the magnuson or should i run as fast as i can from this tuner?

edit: tuner is telling me I can go e30/40 with Magnuson and stock fuel parts.....thoughts?

[Z OH 6]

If the boost is low enough, no issues running an ethanol blend.

[arpad_m]

I have the LT4 fuel system and injectors plus a JMS voltage booster, and can run ~E60-65 at 10 psi of boost. From what I read, the law of diminishing returns kicks in hard at around E50 or E60, so I'm not going to push for more. The only inconvenience is having to blend with 93, but that's okay with me.

[Joshinator99]

Originally Posted by clg82

Just like the title says. I’m getting a magnuson installed in March, I have been speaking with a local tuner about looking over the stock CARB tune that comes with it to get the most out of the magnuson and he suggested going e85 as well. I thought with the magnuson I would be at or near the top of the fuel for the ZL1. Thoughts? Can i run e85 and the magnuson or should i run as fast as i can from this tuner?

edit: tuner is telling me I can go e30/40 with Magnuson and stock fuel parts.....thoughts?

As Z OH 6 and Arpad suggested, you can…the question is how much. With a stock cam it will be very limited even assuming you’re not running much boost. I’d probably install a JMS voltage booster on the in-tank pump at the very least and then give E30 a try while carefully watching low pressure, high pressure, and injector pulse width. A cam with a bigger fuel lobe would be the next move (or port injection).

[laynlo15]

Yup the lower the boost the more E you can run. The boost a pump is a good option for keeping the low side from dropping off too far and not being about to supply the high side.

[airtroop01]

Originally Posted by clg82

Just like the title says. I’m getting a magnuson installed in March, I have been speaking with a local tuner about looking over the stock CARB tune that comes with it to get the most out of the magnuson and he suggested going e85 as well. I thought with the magnuson I would be at or near the top of the fuel for the ZL1. Thoughts? Can i run e85 and the magnuson or should i run as fast as i can from this tuner?

edit: tuner is telling me I can go e30/40 with Magnuson and stock fuel parts.....thoughts?

I was in the same boat as you are.
Ultimately I ended up selecting the Maggy 2650, 103 snout and NW TB, toohighpsi secondary fuel injection plates, cordes low side, and a Maf Fusion controller. I ditched the included tune and got a custom flex fuel tune. Also ended up getting the TCM unlock so the transmission shift points can be tuned.

I’m running 100% e85 and don’t have to run the substandard CA 91 octane if I don’t want to. No meth and no concerns about running out of fuel. Stock exhaust headers, stock cats and it idles smoothly too.

[Camaro1973]

Originally Posted by clg82

Just like the title says. I’m getting a magnuson installed in March, I have been speaking with a local tuner about looking over the stock CARB tune that comes with it to get the most out of the magnuson and he suggested going e85 as well. I thought with the magnuson I would be at or near the top of the fuel for the ZL1. Thoughts? Can i run e85 and the magnuson or should i run as fast as i can from this tuner?

edit: tuner is telling me I can go e30/40 with Magnuson and stock fuel parts.....thoughts?

All depends on how much power/boost your planning. If you keep the stock pulley and stock lower, your going to be making 15+ psi. Your not going to be able to run much ethanol with no low side upgrade. Only way to tell is to put the maggie on, and play with pulley sizes. Its a catch 22, you either run more boost and less E or stay on 93, or lower boost and run Ethanol.


I would get an AUX low side though, its not that expensive.

[clg82]

Originally Posted by Camaro1973

All depends on how much power/boost your planning. If you keep the stock pulley and stock lower, your going to be making 15+ psi. Your not going to be able to run much ethanol with no low side upgrade. Only way to tell is to put the maggie on, and play with pulley sizes. Its a catch 22, you either run more boost and less E or stay on 93, or lower boost and run Ethanol.


I would get an AUX low side though, its not that expensive.

In you scenario above, what would be the good or bad about either running more boost and less E or less boost and more E? SOrry for the armature question i just don’t know much about running E.

[clg82]

Originally Posted by airtroop01

I was in the same boat as you are.
Ultimately I ended up selecting the Maggy 2650, 103 snout and NW TB, toohighpsi secondary fuel injection plates, cordes low side, and a Maf Fusion controller. I ditched the included tune and got a custom flex fuel tune. Also ended up getting the TCM unlock so the transmission shift points can be tuned.

I’m running 100% e85 and don’t have to run the substandard CA 91 octane if I don’t want to. No meth and no concerns about running out of fuel. Stock exhaust headers, stock cats and it idles smoothly too.

What power are you running with the stock cats and that setup?

[airtroop01]

Originally Posted by clg82

What power are you running with the stock cats and that setup?

I did a write up on here about my journey that you might be interested in.
But, the car made 808rwhp with that setup. Runs strong and since then I
had to get the transmission fluid changed (I’m running an A8) and a TCM unlock
so the shifting is right and it holds the rpm where I need it. Should have gotten
the TCM at the get go and it would have saved me some on tuning/retuning.
I’m tempted to turn the wick up to 900rwhp but I’m leaning more towards
less boost/less heat/less power = better road/autocross/open track car.

As to your previous question, regarding boost/e85/pump…
I’ve run a lot of high horsepower cars in California and the 91-octane stuff
is straight garbage. You’d have to run like 5 gallons of 100-octane to a tank
to catch up to the 93-octane in other states. Therefore, if you have a tuner
worth their salt, they are going to pull ALOT of timing out and the car will
run alright (it’s an LT4 with a 2650 after all) but it’s not going to have the
power and sheer hellcat-embarrassing power that most of the modded cars
here are showing. e85 is basically 100-octane and even with the worse gas mileage… still cheaper than running around with 91-octane. But, if I’m on a road
trip and there’s nothing else, I can take the 91-crap and run it with the flex tune.

[Camaro1973]

Originally Posted by clg82

In you scenario above, what would be the good or bad about either running more boost and less E or less boost and more E? SOrry for the armature question i just don’t know much about running E.

Power through efficiency is of course the best. If you can make the same amount of Power running less boost the better.

You really won’t get the full Benefit of ethanol unless your running e50-60.

However, Even a less mix of ethanol like e30-40 is still benefical as you’ll be able to run decent boost, good timing etc. because your octane will be around 96-98.
Cooler combustion etc. it’s also free hp and no change in tune needed.

I gain about 35-40whp going from 93 to E40

Without a cam, it’s not going to matter what fuel you have. Your going to be limited to a max of 700whp if your just swapping the blower. You can expect anywhere from 640-680whp. Depending on headers and other mods.