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11:1 327 on E85 vs 370 on pump?

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Old Feb 17, 2011 | 03:16 AM
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Default 11:1 327 on E85 vs 370 on pump?

I've been wanting to put a forged shortblock in my 2000 single cab. The plan was a AES 370 longblock with 317s on pump gas until I saw AES release the 327 forged longblock for 4400. Goal for the truck is to trap 130 and run somewhere in the 10's being that this truck will be more of a street truck. My choice of turbo will probly be a T6 budget s480 or GT80 unless you guys think I can get away with something larger? I've already got a kb racing front mount kit on the truck.

Down to the griddy, will a 327 with 10 to 11:1 compression on E85 produce around the same amount of power As a 370 on pump gas with 9:1? I like the 327 because the cylinder walls are much thicker,higher revving motor,cheaper,better gas mileage I would assume and just the fact that it will be a stock cube motor is cool and different.

I want to make right around 800rwhp with less then 20psi on AES ported 317's and later I would put some etp's or trickflows and bring the boost up to 26-30 psi and shoot for a 1000rwhp on E85

Suggestions??
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Old Feb 17, 2011 | 08:21 AM
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I would run E85 regardless of what engine
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Old Feb 17, 2011 | 12:01 PM
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Originally Posted by rotary1307cc
I would run E85 regardless of what engine
X2

I would run the 370 as the addtional CID will help reach your goals.
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Old Feb 17, 2011 | 07:14 PM
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Originally Posted by rotary1307cc
I would run E85 regardless of what engine
x3
my plan is 5.3 with the S400-80 with the 96mm turbine wheel (only $899), would hit your goals on high boost depending on drive train lose.
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Old Feb 17, 2011 | 07:35 PM
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if it came down to an alum high compression 5.3 vs an iron 370 at 9:1 i would buy the 5.3 multiple times over the 6.0. E85+ high compression FTW
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Old Feb 17, 2011 | 07:57 PM
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Can you get a higher comp 370 built? I wouldn't be afraid of the bigger cubes if you're going with that large of a turbine. Could use 243s to bring up the comp a little bit over the 317s. I would run E85 either way as well if you can.
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Old Feb 17, 2011 | 08:54 PM
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The thing is I have no use for the bigger cubes or big big horsepower so it's one or the other if I do a 370 I will run pump if I do the 327 I'll make it high compression on E85. My question didn't really get answered :/ ? Power vs power what will happen? Another thing o don't want is a 370+ cubes and an 80mm causethen I won't have lag and lag is something I want for street purposes.
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Old Feb 17, 2011 | 11:01 PM
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This does not answer your question about power difference between the 2 engines, but if you run e85 on the 327 your gas mileage will be much lower than you are planning. E85 requires roughly 30% more fuel than regular pump gas.
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Old Feb 17, 2011 | 11:04 PM
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Originally Posted by quicksilverado
This does not answer your question about power difference between the 2 engines, but if you run e85 on the 327 your gas mileage will be much lower than you are planning. E85 requires roughly 30% more fuel than regular pump gas.
Your right I didn't even think of that, gas isn't a huge concern so scratch that part out lol. Thanks!
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Old Feb 17, 2011 | 11:29 PM
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Originally Posted by quicksilverado
This does not answer your question about power difference between the 2 engines, but if you run e85 on the 327 your gas mileage will be much lower than you are planning. E85 requires roughly 30% more fuel than regular pump gas.
Your right I didn't even think of that, gas isn't a huge concern so scratch that part out lol. Thanks!
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Old Feb 18, 2011 | 12:06 AM
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The smaller high compression engine on E85 will make more power than the 370 on 91. E85 is worth HUGE amounts of power vs pump 91, and I have seen E85 make 70+HP over race gas on a 600hp high boost import..... E85 some amazing stuff, Id switch my truck over in a heart beat if I could get it here. If your setup is right you should be able to hit 130+mph easly with a 76mm turbo. I know of a full weight Iron 370CI 4x4 has been over 130mph on pump 91 with a little TC76.

Last edited by stock48; Feb 18, 2011 at 12:17 AM.
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Old Feb 18, 2011 | 02:46 PM
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Originally Posted by quicksilverado
This does not answer your question about power difference between the 2 engines, but if you run e85 on the 327 your gas mileage will be much lower than you are planning. E85 requires roughly 30% more fuel than regular pump gas.
thats such BS, i would bet money that the high compression 327 would get the same milage as the low compression 370 on pump. I have ran E85 and pump on so many cars and compared them, and if you are good at running HPTuners you can actually get better milage on e85 than gas. I did it, took some time but wasnt that difficult.

I also beleive that the 327 would make about the same hp as the 370, but more importantly would make just as much tq. And if you ran a nice responsive turbo like a TC76 on the 327, it would have a amazingly flat power curve
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Old Feb 18, 2011 | 10:58 PM
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Originally Posted by Grr
thats such BS, i would bet money that the high compression 327 would get the same milage as the low compression 370 on pump. I have ran E85 and pump on so many cars and compared them, and if you are good at running HPTuners you can actually get better milage on e85 than gas. I did it, took some time but wasnt that difficult.

I also beleive that the 327 would make about the same hp as the 370, but more importantly would make just as much tq. And if you ran a nice responsive turbo like a TC76 on the 327, it would have a amazingly flat power curve
You are the man. Bet you could get better mileage out of reg gas vs diesel too. E85 has less energy per gallon than reg gas. Go tweak the tune on the gas again and you may be surprised.
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