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

Stock Bottom End Dyno#s For LT1 N/A 93 Octane and on E85

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Old 04-07-2008, 11:04 AM
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Are you still running a stock gastank/fuellines?? what are you running for a pump?

those are crazy numbers! very impressive cant wait to see some track times.


The only thing im going to say about the E85 issue is that its being made out of corn, there has been studies that you can get as much as 3x as much ethonal out of 1 acre of switch grass then you can corn, but yet they still insist on using corn, i think they should just plant switch grass in the ditches around here and keep the farm land for food source.

BUT I think if we're all going to have the alternative fuel conversation again it should be started in seperate thread, to keep this on the subject for the OP dyno #'s
Old 04-07-2008, 11:21 AM
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You're car is pretty impressive! Sounds great@WOT



Originally Posted by Formula350
APPARENTLY It's exhaust output isn't any better than fossil fuel
Not to sound like a jerk, but COMPLETELY wrong. I have seen, first hand with a 5 gas analyzer, that E85 produces ZERO Hydrocarbons(well.. because it isn't a hydrocarbon based fuel)

Pro Dyno Tech did a conversion on a late 90's Mercedes C230 and numbers were astonishing. I have a picture somewhere of what the results were. The ONLY thing it produces was carbon dioxide.

I'm converting pretty much everything I own to be able to use E85.

Back to the LT1
Old 04-07-2008, 11:44 AM
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Originally Posted by Formula934
The reason the car didnt like high amounts of E85 is because ethanol has a lower energy density that regular gasoline fuel. With that in mind i dont think ill be putting that in my tank... Ever.
That's why I run at a ratio. You can feel the extra pep off the line. That, and it's 40c~ cheaper a gal.
Old 04-07-2008, 12:54 PM
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+1 totally wrong ^^^
Old 04-07-2008, 01:07 PM
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Originally Posted by WhiteS13
You're car is pretty impressive! Sounds great@WOT





Not to sound like a jerk, but COMPLETELY wrong. I have seen, first hand with a 5 gas analyzer, that E85 produces ZERO Hydrocarbons(well.. because it isn't a hydrocarbon based fuel)

Pro Dyno Tech did a conversion on a late 90's Mercedes C230 and numbers were astonishing. I have a picture somewhere of what the results were. The ONLY thing it produces was carbon dioxide.

I'm converting pretty much everything I own to be able to use E85.

Back to the LT1
Well I'm not claiming to know, I was just repeating what others were saying. So no need to climb up my *** about it
Old 04-07-2008, 01:15 PM
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Originally Posted by WhiteS13
Not to sound like a jerk, but COMPLETELY wrong. I have seen, first hand with a 5 gas analyzer, that E85 produces ZERO Hydrocarbons(well.. because it isn't a hydrocarbon based fuel)


ummm... I'm seroiusly not trying to be an ***, but E85 has 15% gasoline in it, hence E85 means 85% ethanol and 15% gas. Also ethanol is a ethane molecule with a hydroxide on the end, which is technically an impure hydrocarbon.

It does burn more cleanly (only produces CO2, H2O, and heat), and has lower NOx emissions, but it produces more CO2 than fossil fuels (just fyi).

Originally Posted by Formula934
The reason the car didnt like high amounts of E85 is because ethanol has a lower energy density that regular gasoline fuel. With that in mind i dont think ill be putting that in my tank... Ever.
Exactly, the only reason the octane rating is higher is that ethanol alcohol has an higher resistance to compression ignition when compared to gas. Gas has a higher amount of stored energy, E85 contains roughly 65% of the energy density of gas, this means you have to put more fuel into your engine for the same amount of power.

E85 does allow for more favorable timing because of it's resistance to detonation, which helps offset the efficiency difference between E85 and gas, but generally a drop in mpg's can be seen.

All this information can be found on http://en.wikipedia.org/wiki/E85 , http://en.wikipedia.org/wiki/Alcohol_fuel, and http://en.wikipedia.org/wiki/Ethanol_fuel with cited studies.

Sorry to hijack the thread.

Sweet numbers LPE Z! That's the ballpark I'm aiming for when I finish my undergrad and grad school and actually get paid for having a brain

Last edited by zjt; 04-07-2008 at 01:20 PM. Reason: forgot some info
Old 04-07-2008, 05:11 PM
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Originally Posted by Formula350
Full 100% E85 or a ratio of 93/E85?

My car didn't like running high % of E85. So I figure I could probably push 50:50, but if I do I play it safe and go 60:40. (Petrol/E85)
My car is running off 100 % E85. If you want to run E85 you really need to retune your car and adjust your fuel tables for the E85. The nice thing is you can also add more timing as well..
Old 04-07-2008, 05:13 PM
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Originally Posted by bigbadblack93z
why the switch to e85? just for the sake of using it? if so thats cool. i'm wanting to do the same there are a few stations around here.
I wanted to see how much the car would gain from E85. I am actually more impressed with the 93 octane #s
Old 04-07-2008, 05:17 PM
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Originally Posted by LT14LIFE JT
Very impressive numbers, especially through a 12 bolt. The cam specs are unreal. I always thought that LT1s loved a high exhaust lift, but the dyno proved that theory wrong...LOL Time for some more R&D. Also, when is E85 coming to the east coast?
Suprised me as well. This car also with the 30# injectors making 416rwhp put down on a 175 shot 609rwhp and 657rwtq. I didn't want to chance it this time on the nitrous. Point being the cam also loves nitrous.
Old 04-07-2008, 05:18 PM
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nice numbers, and I dont wanna come off as an ***, but talk to warren buffet and kofi annan's successor and they will give you a good reason why not to use E85. something isn't renewable when it takes nonrenewable resources to create it and sustain it, while increasing aggregate commodity prices.
Old 04-07-2008, 05:19 PM
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Originally Posted by LS1 SPEED
wow ! great #'s
Thanks Got to love the LT1s
Old 04-07-2008, 05:22 PM
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Originally Posted by LT1BRN
Great numbers for H/C, care to list your supporting mods?
Thanks
Old 04-07-2008, 05:25 PM
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Thanks everybody else as well .. I haven't decided to leave the car on E85 or just run 93 octane mix with a little 100 unleaded for the nitrous.
Old 04-07-2008, 05:31 PM
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How much more timing are you running with the e85 and how much more fuel did you have to add? Also whats your c/r?

Badass #'s BTW.
Old 04-07-2008, 05:51 PM
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Killer #'s for a stock bottom end..

As for the E85 conversion, you SHOULD replace all the parts in your fuel system that are rubber. The alcohol that is in E85 will dry them out, terrible. I think you could get away with mixing it, no problem.
Old 04-11-2008, 10:21 AM
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great numbers chris,

e-85 is the bomb.....

cant wait to see you spray the guts out !

come on dont be a wusssss

for the record my 93 cobra picked up 25hp to the tire on e-85.

same dyno as chris.
Old 04-11-2008, 10:33 AM
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Originally Posted by flyinZ

I think you could get away with mixing it, no problem.
yes, it will still run but the driveability is not as good.

remember gas even mixed w/e-85 will be make the car run fat.

i would not recomend it unless you have to,
like to get to the e-85 pump
but mixing all the time is not gonna work.

e-85 requires around 20-25% more fuel and timing is usually alot higher

mine on 93 octane gas 34 degrees

on e-85 46 degrees total

is their a happy medium ?? doubt it !
Old 04-11-2008, 11:10 AM
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Originally Posted by USE2BFORDGUY
remember gas even mixed w/e-85 will be make the car run fat.
Am i not understanding this correctly? I was thinking that mixing in some E85 would make it run lean if the car is tuned for gasoline
Old 04-11-2008, 05:56 PM
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i ran 471/561with a stock bottom end for a couple years on spray...then it cracked a piston
Old 04-11-2008, 09:08 PM
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Originally Posted by speed_demon24
How much more timing are you running with the e85 and how much more fuel did you have to add? Also whats your c/r?

Badass #'s BTW.
Thanks
I think the timing was at 40 degrees @WOT. I think my CR is 10.8 to 1. The car on 93 octane was @67% duty cycle and with the E85 i was at 90% duty cycle. Ron said you add 25-30% more fuel.

Chris


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