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Unread 10-17-2010, 09:42 PM   #21
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Originally Posted by wierdo124 View Post
I believe you misread his post...cause you just proved his point lol
nope, energy density and octane are two very different things.
One explains how much energy you get per unit volume in combustion, the other defines how clean of a burn you get.
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Unread 10-17-2010, 10:24 PM   #22
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Originally Posted by Felipe the Ant View Post
Did they ever fix that issue where it screws up cats? (ethanol)
Wouldnt know i dont have any lol.
but my dodge is flexfuel with 50 thousand miles and have had no problem with it at all and have ran the e-85 in it almost as much as normal gas

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Unread 10-17-2010, 10:33 PM   #23
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Originally Posted by pbasil1 View Post
Wrong, it has less actually, but has a much higher octane rating (105 octane) So you can run higher boost levels, or compression ratios without detonation. You actually have to run 20-35% more e85 through the engine, than gasoline to produce the same power.
moslty correct more like 110 octane (depending on the mix like diesel there is a summer blend and a winter blend)

SO in my case to buy race Fuel of the equivalent octane rating (to prevent detonation and knock) would cost close to 5 a gallon for race fuel and would basically ruin going on the Colorado cruise day and other local cruise's, plus it would ruin my saying "Corn Powered Rice Killer"

BUT!! Before you run out and spend the money on injectors to switch your car to E-85, Its not worth it unless your running some type of forced induction. A buddy with a heads/cam Gto switched to it and it made the car feel more drivable, but it only gained 3hp/5tq or something like that

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Unread 10-17-2010, 10:49 PM   #24
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Originally Posted by Bansheetwin360 View Post
00 Firebird with Vortech supercharger @ 9-10 PSI E-85 gas and pushing 550hp on stock heads, cam, bottom end
I'm gonna have to call BS. Dynosheet plz.
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Unread 10-17-2010, 10:59 PM   #25
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Originally Posted by Raptor22 View Post
If you have a supercharger you want to switch to a bigger crankshaft pulley to spin the supercharger belt faster. If you are naturally aspirated, you want an underdrive pulley to reduce the parasitic power loss.
Umm... Completely wrong as well as the rest of your posts.

They were clearly talking about a smaller pulley for the supercharger itself, not a crankshaft overdrive pulley. You can leave all the pulley's the same size and just make the supercharger's smaller, which in turn makes it spin faster.

When I had my Grand Prix GT(Bullattack can back me up on this as well) I was thinking about top swapping it and putting an M90 on the N/A 3800. To run more boost on those engines, guys would get a 3.8", 3.6", 3.4", etc size pulley to put on the supercharger dolly. Stock it was 4".
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Unread 10-17-2010, 11:13 PM   #26
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Never seen so much talk about gas and pulleys in such a small post count .

I'll have to back up Twist's post though, he's spot on with the supercharger pulley. There's no need for any other pulleys to be swapped when the one on the S/C can be swapped.
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Unread 10-18-2010, 12:17 AM   #27
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Ok the pulley thing. I've been trying to stay out of this thread to avoid arguments which I'm already to good about getting into but. All cars while slightly different work off the same principal rules as far as the pulley thing your both right and wrong depending which post we refer to. This is the basic principal with generic measurements. If you have a 8" Crank Pulley and a 4" SC pulley and you crank pulley is rotating at a RPM of 1000 then your SC pulley is rotating at a RPM of 2000 given it's half the diameter. So If you Increase the Crank pulley size to 10" and still rotating at 1000rpm much like tires now at the same speed it's covering more distance on the belt so your SC pulley would be at a increased RPM probably about 2400rpm not doing the math but you get the idea. If I then drop the crank pulley size to 3" The belt is traveling at the same speed so it has to spin faster to cover the same distance meaning more rpm's probably around 2600rpm's. Get it both items ultimately do the same thing just by different means.

So by going with a smaller SC pulley SC speed is increased, or by going with a bigger balancer pulley SC speed is increased. Either way same out come by doing both probably gonna blow something. Or do like some idiots with a under drive pulley and a smaller SC pulley that works out to about stock ratio accomplishing nothing.

A under drive crank pulley turns accessories slower meaning less engine load and increased power which is pointless on a SC application unless Turbo.

Works just like Tires bigger gears means less RPM increase tire size and cover same distance.
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Unread 10-18-2010, 01:48 AM   #28
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Originally Posted by lautinjr View Post
Ok the pulley thing. I've been trying to stay out of this thread to avoid arguments which I'm already to good about getting into but. All cars while slightly different work off the same principal rules as far as the pulley thing your both right and wrong depending which post we refer to. This is the basic principal with generic measurements. If you have a 8" Crank Pulley and a 4" SC pulley and you crank pulley is rotating at a RPM of 1000 then your SC pulley is rotating at a RPM of 2000 given it's half the diameter. So If you Increase the Crank pulley size to 10" and still rotating at 1000rpm much like tires now at the same speed it's covering more distance on the belt so your SC pulley would be at a increased RPM probably about 2400rpm not doing the math but you get the idea. If I then drop the crank pulley size to 3" The belt is traveling at the same speed so it has to spin faster to cover the same distance meaning more rpm's probably around 2600rpm's. Get it both items ultimately do the same thing just by different means.

So by going with a smaller SC pulley SC speed is increased, or by going with a bigger balancer pulley SC speed is increased. Either way same out come by doing both probably gonna blow something. Or do like some idiots with a under drive pulley and a smaller SC pulley that works out to about stock ratio accomplishing nothing.

A under drive crank pulley turns accessories slower meaning less engine load and increased power which is pointless on a SC application unless Turbo.

Works just like Tires bigger gears means less RPM increase tire size and cover same distance.

+1 for a post that makes sense. And I used a smaller S/C pulley on my Regal, increased boost to about 14-15 PSI.
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Unread 10-18-2010, 03:09 AM   #29
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Exactly, also

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Originally Posted by pbasil1 View Post
Wrong, it has less actually, but has a much higher octane rating (105 octane) So you can run higher boost levels, or compression ratios without detonation. You actually have to run 20-35% more e85 through the engine, than gasoline to produce the same power.
he didn't misread anything. If I can maybe simplify it: higher octane fuel doesn't burn cleaner or make any more power than regular fuel. It's used in high performance/compression engines because if they burned lower octane fuel they would have pre-detonation issues. They would basically act like a diesel but it would be worse because they'd fire before they were meant to and cause all sorts of ruckus.

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Unread 10-19-2010, 08:05 PM   #30
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I'm gonna have to call BS. Dynosheet plz.

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