LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LE3 385 on E85 with 450rwhp possible?

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Old Jan 16, 2009 | 02:27 PM
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Cool LE3 385 on E85 with 450rwhp possible?

Now that my TA will never be a daily driver again, and E85 is become more locally available, I am considering making my 385 build strictly E85. I already have a Scat 9000 3.75 crank, SRP 4.040 pistons, LE3 heads, 5.7 Scat I-beams. Was planning on about 12.3 SCR and cam above 9.0 DCR for E85, so if I need to switch back to gas, all I would have to swap out is the cam to get a lower, more 93 octane friendly DCR. Intake will be ported by Lloyd later as well, and I have the M29 trans and will run 3.73-3.90's in my 10-bolt.

I want to keep the shift revs below 6600 to keep it a somewhat torquey motor, vs a 7000 rpm rev-happy race motor. As well as to keep the Scat crank happy. BTW, I ran open cutout 100% and solid engine mounts and find it perfectly fine, so I can tolerate, and expect some harshness. Use for the car will be occasional weekend car, autocross, and road course track days. It is not a drag car, other than maybe twice a year, and always on street tires.

Do you guys think an E85 LE3 headed 383 would make about 450 rwhp keeping the revs below 6600? Just want some opinions.
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Old Jan 16, 2009 | 02:32 PM
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I see no reason why it cant. Maybe not the first time out, but through some tuning and optimizing the heads shouldn't be a limiting factor. I would have Le spec the cam for you.
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Old Jan 16, 2009 | 02:41 PM
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I think so. My LE2, stock short block on 93 made 413.66, with a Dana S60, would be closer to 430 with a 10 bolt,
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Old Jan 16, 2009 | 02:54 PM
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my LE2 setup makes 434hp through a A4,you should have no problem doing it through a 6speed.
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Old Jan 16, 2009 | 07:29 PM
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yup...should be no issues. I did an E85 build also, and I have two separate tunes so I can switch back to 93 if I would like. Gas fill ups come a bit more frequently and you have to know where they sell E85 if you drive out of your hometown.
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Old Jan 16, 2009 | 11:12 PM
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shouldnt be a problem. M6/10 bolt cars dyno great.
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Old Jan 16, 2009 | 11:15 PM
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I did 449 to the tire with a similar set up through a 12 bolt on E85
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Old Jan 17, 2009 | 05:02 PM
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Originally Posted by nichols92
I did 449 to the tire with a similar set up through a 12 bolt on E85
Any details on your setup? Or track #'s?

I think its possible, as long as everything is matched up correctly, and the tune is "on".
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i dont know why it should not be able to be done...its not like your askin to much more than alot of ppl have already done to their cars
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Old Jan 17, 2009 | 09:25 PM
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Build the motor right the first time, get all of the tolerances correct, get a proper tune
and don't skimp on the valvetrain ... 450 is very doable.
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Old Jan 26, 2009 | 02:17 PM
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I got one suggestion for a custom cam with 12.2 SCR and would put DCR at 9.1
23x/24x .61x/.61x 108 LSA.

What do you guys think about this cam? What kind of 1/4 MPH and rwhp do you think this would put down on LE3 heads in a 385? Like I said, its not going to be a drag car, just a weekend street/autox/RR car, I'm still on the 10-bolt and street tires, so 1/4 ET isn't of much concern.
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