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[Kylemenz1]

What?s your opinion on E85?

I've got a Carrera 257 Effect with a Mercury 525sc that i put a 420 mega blower, intercooler, Holley black fuel pump, and has MSD box, coil, distributer, and wires. I'm currently running 7lbs. With E85 so readily available, and it being pretty cheap, I was thinking of switching over and running more boost. Is E85 ok for long durations of WOT?

[wrighton]

The question I have is how fresh is the 420 and how much boost can they handle? I had one, did not get to run it with superchiller, at a low whopping 3-5% boost. Stock 454, 92 octane.

[Kylemenz1]

The question I have is how fresh is the 420 and how much boost can they handle? I had one, did not get to run it with superchiller, at a low whopping 3-5% boost. Stock 454, 92 octane.

It's ok. I had a shop go through it when I rebuilt the motor last year. I've never had any problems making boost with it. I was running 13lbs with no Chiller when I melted a few pistons. Hence the rebuild.

[obnoxious001]

What?s your opinion on E85?

I've got a Carrera 257 Effect with a Mercury 525sc that i put a 420 mega blower, intercooler, Holley black fuel pump, and has MSD box, coil, distributer, and wires. I'm currently running 7lbs. With E85 so readily available, and it being pretty cheap, I was thinking of switching over and running more boost. Is E85 ok for long durations of WOT?

How much boost are you thinking,, and have you considered how much power you will be putting through the drive (stock Bravo?)?

I don't have any direct experience with the E85, but did rebuild a 496 turbo engine that's running E85 for a board member who hurt it when he lost fuel pressure at higher speeds.

One thing to be aware of, the E85 may not be as consistent in octane rating as you might want. Also, you will need larger fuel tanks to go the same distance as you do now with gasoline. You can have your carbs converted, or buy parts to do it yourself. You will probably have to replace fuel lines and such more often due to the alcohol.

[obnoxious001]

It's ok. I had a shop go through it when I rebuilt the motor last year. I've never had any problems making boost with it. I was running 13lbs with no Chiller when I melted a few pistons. Hence the rebuild.

13 lbs with what fuel? Fuel volume and ignition timing is part of the equation as well.

[Kylemenz1]

13 lbs with what fuel? Fuel volume and ignition timing is part of the equation as well.

I was running 91, about 36 degrees of total timing, and fuel volume I'm not to sure. I have 3/8 fuel line to the Holley Black pump and the #6 lines to the 750 Holley Supercharger carbs at about 9psi. The guy who I was getting info from was a car guy and gave me some bad info for boating applications, and just bad info all together.

I was looking at E85 as a way to increase HP and keep the motor safe. I have heard about drag guys using it and having great success. So I'm just wondering if it's worth it to switch over, and what engine builders/racers opinions are.

Thanks for the input.

[wrighton]

I was running 91, about 36 degrees of total timing, and fuel volume I'm not to sure. I have 3/8 fuel line to the Holley Black pump and the #6 lines to the 750 Holley Supercharger carbs at about 9psi. The guy who I was getting info from was a car guy and gave me some bad info for boating applications, and just bad info all together.

I was looking at E85 as a way to increase HP and keep the motor safe. I have heard about drag guys using it and having great success. So I'm just wondering if it's worth it to switch over, and what engine builders/racers opinions are.

Thanks for the input.


I never researched the E85 cost to convert things over. Im at a position where I would like a pump gas set up. But if I wanted to change pulleys and bump the boost I could fill with 100 and get more HP.

I never had a boost gauge but I know I ran enough to push and torch a head gasket and made a groove on the block and head between cylinders. OUCH

[obnoxious001]

I was running 91, about 36 degrees of total timing, and fuel volume I'm not to sure. I have 3/8 fuel line to the Holley Black pump and the #6 lines to the 750 Holley Supercharger carbs at about 9psi. The guy who I was getting info from was a car guy and gave me some bad info for boating applications, and just bad info all together.

I was looking at E85 as a way to increase HP and keep the motor safe. I have heard about drag guys using it and having great success. So I'm just wondering if it's worth it to switch over, and what engine builders/racers opinions are.

Thanks for the input.

Yep,, too much ignition timing, best to start off more conservative. You are pushing a bunch of water, constant load. I had someone "torch" a brand new Dart block and heads once in a race engine I built,, only ran it about 10 minutes with 36 degrees and a roots blower.

[obnoxious001]

I never researched the E85 cost to convert things over. Im at a position where I would like a pump gas set up. But if I wanted to change pulleys and bump the boost I could fill with 100 and get more HP.

I never had a boost gauge but I know I ran enough to push and torch a head gasket and made a groove on the block and head between cylinders. OUCH

You can actually do that without boost,, years ago I built a street engine for a Suburban, perhaps 500 HP according to chassis dyno.. The owners sons managed to torch a groove in the block and head, just like a blown engine, running too hot through the desert, and I would guess they had bumped the timing looking for more power.

[wrighton]

You can actually do that without boost,, years ago I built a street engine for a Suburban, perhaps 500 HP according to chassis dyno.. The owners sons managed to torch a groove in the block and head, just like a blown engine, running too hot through the desert, and I would guess they had bumped the timing looking for more power.

Good Point! I do believe the distributor had vibrated loose and timing became part of the meltdown. I was beating on it pretty hard that day.

I now go through and do an occasional bolt check.

[racerden]

How much boost are you thinking,, and have you considered how much power you will be putting through the drive (stock Bravo?)?

I don't have any direct experience with the E85, but did rebuild a 496 turbo engine that's running E85 for a board member who hurt it when he lost fuel pressure at higher speeds.

One thing to be aware of, the E85 may not be as consistent in octane rating as you might want. Also, you will need larger fuel tanks to go the same distance as you do now with gasoline. You can have your carbs converted, or buy parts to do it yourself. You will probably have to replace fuel lines and such more often due to the alcohol.I'm in the finishing stages of a TT 468 and have done extensive research regarding E85. Barry's spot on regarding the consistancy issue and the high flow characteristics.
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[racerden]

Yep,, too much ignition timing, best to start off more conservative. You are pushing a bunch of water, constant load. I had someone "torch" a brand new Dart block and heads once in a race engine I built,, only ran it about 10 minutes with 36 degrees and a roots blower.

Betcha during those 10 minutes worth, it hauled ass. Expensive learning curve to say the least.
DV
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