[Need4Camaro]

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

[Joshinator99]

Originally Posted by Need4Camaro

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

Any tuner worth his salt is monitoring low side fuel pressure, high side rail pressure, and injector pulse width. A mostly stock LT1 car is probably fine on full E85. It’s when you start adding superchargers where the fuel system demand starts to go nuts…

[Essmotorsports]

Originally Posted by Need4Camaro

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

Don't go to that tuner! 🙄

[LT1ornothing]

Originally Posted by Need4Camaro

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

Sounds like you were getting baited into a tune/mod proposition. The stock LT1 fuel system has been proven to handle E85 with FBO and/or heads and cam.

[laynlo15]

I was able to run E85 on the stock fuel system till I added the SC and port injection. I wouldn't run full E in very cold climates as you live in. Mix down or at least add Lucas Ethanol stabilizer as I and many other do.

[adamjwilson]

Exactly what they said above!

[Spaceme1117]

Originally Posted by Need4Camaro

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

This guy does not know what he is talking about.

Tons of people running e85 on the stock HPFP.

[KingLT1]

Stock LT1 fuel system will support full E @ .88 lambda up to 580whp. NA cars generally target .88-.90. The reason why cars with boost cannot run E on stock fueling is because they have to target a much fatter afr of .82.

The guy you talked to either doesn't know what he's talking about or was trying to pray on ignorance and drum up business.

Your car likely ran crappy on cold start @ 15* ambient temp on E because there are some alcohol tables (timing and afr related) to help with those conditions that may need tweaked. Most filling stations have reduced E content in the winter for better cold starting. You could also just add some pump gas in the mix to lower E content further. Drop it back to E50 and see if its better.

[ZO6Ted]

39 today in Austin warming to 72 in 5 more days. This weathers been brutal for us Texans lol. Happiness a few days away.

[Need4Camaro]

Yeah its unbelievable how cold it can get in Texas. I was more shocked by how cold it can get here than how hot it gets here.

Today the cold start wasnt as bad.

[FlukeSS]

Originally Posted by Need4Camaro

Yesterday while I was at the fuel station, another Camaro SS pulled up to the pump beside mine. I told the driver he had a nice car. He told me it actually wasnt his but instead he was tuning it after a full exhaust install. So we got to chatting and he asked me if I was tuned for E85.. I told him I was and he told me 'no youre not... ...the best you can get out of these cars on stock injectors and stock cam is E45.. half premium and half E-85' .. he then told me, most tuners do not monitor the high pressure fuel pump when tuning, its supposed to run ~ 2300 PSI but running full E85 he has seen to drop to as low as 300 PSI and he told me that is dangerous (and it sounds dangerous) ... he told me that at minimum you need a cam to help out the high pressure fuel pump or you risk starving the motor and detonating...

Well, I wasnt 100% sure on this but later it got cold as sin (15*F) and my car ran very crappy and misfired on cyl 3 until it got warm about 10 minutes later and started running fairly normal again. I ended up needing to refuel but when I pumped, it pumped VERY slowly... and I began to remember what that guy said while wondering if the viscosity of E-85 might be burdensom on stock equipment....

Thoughts?

Well,

I've gone 18 months on E85 Tune, without issue. On the road, and at the drag strip.

Originally Posted by KingLT1

Stock LT1 fuel system will support full E @ .88 lambda up to 580whp. NA cars generally target .88-.90. The reason why cars with boost cannot run E on stock fueling is because they have to target a much fatter afr of .82.

The guy you talked to either doesn't know what he's talking about or was trying to pray on ignorance and drum up business.

Your car likely ran crappy on cold start @ 15* ambient temp on E because there are some alcohol tables (timing and afr related) to help with those conditions that may need tweaked. Most filling stations have reduced E content in the winter for better cold starting. You could also just add some pump gas in the mix to lower E content further. Drop it back to E50 and see if its better.

^ This

Known fact E85 in cold temps are known for rough starts. I've been mixing mine 1:2 93 and E85 and on occasion 1:4 93 and E85 had no issues with 20 degree F starts like this morning.

[Need4Camaro]

Cold start issue turned out to be Fuel Injector #3 ... replaced it and the MIL went out and rough cold start idle stopped. It was on its way out before the E85 tune but I guess the heavier fuel demand pushed it over its limits.