[EddieM92]

I’m contemplating on buying the WeaponX lt4 blower conversion for my LT1 Camaro SS. I’ve only heard good thinks about their kits easy bolt on and produce good power. mid 10s on the track. But my main concern is if it’s possible to run e85 without going over the capabilities of the stock fuel system. Or would the intank fuel pump be enough to make it work.

[misterjaayy]

You would need to upgrade to run full E-85. I’m not even sure the full LT4 fuel system could hang on with E85. Would probably have to go with something more robust. I suggest you go through this thread when you have some time. It answers a lot of questions about FI, E85, and fuel limitations.

https://www.camaro6.com/forums/showthread.php?t=475402

This one should answer your question too.

https://www.camaro6.com/forums/showthread.php?t=522004

Just gotta search around a little.

[KingLT1]

Full LT4 fuel system is good to 560-580whp(depending on dyno) on e85 with forced induction. So you would be right on the edge with the base package. Or you can run 93 octane and make 580whp without touching the fuel system and save 2000.00.

[EddieM92]

Originally Posted by KingLT1

Full LT4 fuel system is good to 560-580whp(depending on dyno) on e85 with forced induction. So you would be right on the edge with the base package. Or you can run 93 octane and make 580whp without touching the fuel system and save 2000.00.

I did some research last night and found out that their is a way around getting the lt4 oem fuel system well not really around it but a cheaper alternative. AC Delco makes the HPFP part number HPM1036 for $658 and the intank fuelpump part number m100183 for $127. They are the same exact parts because AC delco is the company that makes the pumps for GM they just get rebranded GM. Worth a look and I’ve read around that these work just as perfect as the GM branded pumps.

[Inkedmongo]

Originally Posted by EddieM92

I did some research last night and found out that their is a way around getting the lt4 oem fuel system well not really around it but a cheaper alternative. AC Delco makes the HPFP part number HPM1036 for $658 and the intank fuelpump part number m100183 for $127. They are the same exact parts because AC delco is the company that makes the pumps for GM they just get rebranded GM. Worth a look and I’ve read around that these work just as perfect as the GM branded pumps.

True, but then you still have to buy injectors.

[EddieM92]

Originally Posted by Inkedmongo

True, but then you still have to buy injectors.

Go to gmpartsdirect part number 12684127 injectors are highflow specific for 17+ ZL1 for $467

[Inkedmongo]

Originally Posted by EddieM92

Go to gmpartsdirect part number 12684127 injectors are highflow specific for 17+ ZL1 for $467

$1250 for entire upgrade seems more than fair. People saying this will run e85 with forced induction? I have another thread trying to get down on what exactly it takes fuel system wise to run e85 on forced induction without forking out a small fortune for high end fuel system.

[EddieM92]

Originally Posted by Inkedmongo

$1250 for entire upgrade seems more than fair. People saying this will run e85 with forced induction? I have another thread trying to get down on what exactly it takes fuel system wise to run e85 on forced induction without forking out a small fortune for high end fuel system.

Yah exactly with doing some research you can save yourself a couple hundred on buying the upgraded lt4 fuel system. To run e85 and the lt4 blower this is a small amount to pay to hit higher rwhp

[EddieM92]

Bump

[Lemosine]

If im correct, it has been discussed like crazy. the full LT4 fuel system cant run E85, Guys with a ZL1 cant even go E85. You have to get an aftermarket system like this https://www.lingenfelter.com/product...l#.WuKRkojwa-Y

[KingLT1]

You are incorrect. The Stock LT1 fuel system can not run E85 with any amount of boost. The LT4 engine most definitely can especially since it has a bigger fuel lobe on the factory cam. The LT1 can run entry level FI setup on E85 with the LT4 fuel parts but it is close to Max. The issue is you can't go very far on E85 with LT4 setup until you add a cam with bigger fuel lobe, then you can get into the mid 600 range. There is a thread where Jenetty hit like 660whp with LT4 fuel parts, bigger lobe cam, and E60. Couldn't run any higher percentage of E without pressure drop.

[Inkedmongo]

There needs to be more reliable sources here giving this information saying that an LT4 fuel system CANNOT run ethanol on forced induction.

I have spoke to people who are successfully running an LT4 fuel system. One is running E85 with meth, stage 2 cam (+32% fuel lobe,) D1 procharger all on an LT4 fuel system with the addition of a booster on the low pressure pump. They hit 804rwhp on their last dyno pull, and on stock pistons/rods/heads etc.

I have also spoke to someone running an ECS procharger with a completely stock engine with LT4 fuel system, drop in zl1 pump, and a fuel lash cap running 7.5-8psi and getting around 605whp on E60.

How many people on this forum say something will not work yet people are out there doing it with no problems at all?

Clearly the best option for us all (including myself) is to bolt up our systems, throw LT4 fuel system on, flex fuel it, and have our tuners show what area our cars starve for fuel within their software. Clearly elevation plays a role on it all, but I managed to get 1 person out of my entire thread to offer solid advice, while a vendor tried to blame a faulty HPFP as a way to compare how every Camaro has a different amount of power it can throw down before its factory pump starves, which makes no sense at all.

Did the few people I spoke to with success with ethanol and forced induction with good results buy a miracle vehicle or what?

[Lemosine]

Originally Posted by KingLT1

You are incorrect. The Stock LT1 fuel system can not run E85 with any amount of boost. The LT4 engine most definitely can especially since it has a bigger fuel lobe on the factory cam. The LT1 can run entry level FI setup on E85 with the LT4 fuel parts but it is close to Max. The issue is you can't go very far on E85 with LT4 setup until you add a cam with bigger fuel lobe, then you can get into the mid 600 range. There is a thread where Jenetty hit like 660whp with LT4 fuel parts, bigger lobe cam, and E60. Couldn't run any higher percentage of E without pressure drop.

I could of promised in a thread they said it cant Handle E85 because you run out of injector. If the LT4 system can run it there should be alot more ZL1's on E because on FI that's a huge gain.

Again i am not sure so just speaking out.

[misterjaayy]

Originally Posted by Inkedmongo

There needs to be more reliable sources here giving this information saying that an LT4 fuel system CANNOT run ethanol on forced induction.

I have spoke to people who are successfully running an LT4 fuel system. One is running E85 with meth, stage 2 cam (+32% fuel lobe,) D1 procharger all on an LT4 fuel system with the addition of a booster on the low pressure pump. They hit 804rwhp on their last dyno pull, and on stock pistons/rods/heads etc.

I have also spoke to someone running an ECS procharger with a completely stock engine with LT4 fuel system, drop in zl1 pump, and a fuel lash cap running 7.5-8psi and getting around 605whp on E60.

How many people on this forum say something will not work yet people are out there doing it with no problems at all?

Clearly the best option for us all (including myself) is to bolt up our systems, throw LT4 fuel system on, flex fuel it, and have our tuners show what area our cars starve for fuel within their software. Clearly elevation plays a role on it all, but I managed to get 1 person out of my entire thread to offer solid advice, while a vendor tried to blame a faulty HPFP as a way to compare how every Camaro has a different amount of power it can throw down before its factory pump starves, which makes no sense at all.

Did the few people I spoke to with success with ethanol and forced induction with good results buy a miracle vehicle or what?

Well then I guess it boils down to who you believe. The threads I posted answer the question about FI and E85. Janetty is one of the most respected tuners in the camaro community. If you want to go to a message board you will get different answers. It’s the nature of the beast. If it were me, I’d call up janetty, tell him my specific build, my goals, and get the parts from him. Problem solved.