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Cobra Forums
2013-14 Shelby GT500
4.0 whippled cammed gt500 on stock block
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<blockquote data-quote="Willie" data-source="post: 16662271" data-attributes="member: 14133"><p>... for the health... ? Ummm. Ethanol has two pros: 1) Cheap, & 2) Octane. These two points are strong and very tempting, but the cons far outweigh the pros (IMHO). Ethanol is very corrosive and hydroscopic. Very very bad, especially if the car sits a lot. I'm not going to get into all the cons here, but just say I personally will never allow it to touch any of my cars since none of them are designed to use it. If you need the octane, methanol is the way to go (says the methanol king on this forum, lol).</p><p></p><p>You nailed the other statement. I went this route with my 4.2 LC. My former 2.3 TVS with a 2.4" pulley made 19.4 psig but had to spin it over blower redline, about 19,000 rpms. My 4.2 makes 21.5 psig with the largest available pulley, a 4.0", which spins only 12,400 rpms at engine redline. Sweet...!</p><p></p><p>I know a guy who has virtually an identical setup as mine, except he uses a 3.25" pulley and he sees 35 pounds of boost...! So on your 4.0, stay with the 4.0"...</p></blockquote><p></p>
[QUOTE="Willie, post: 16662271, member: 14133"] ... for the health... ? Ummm. Ethanol has two pros: 1) Cheap, & 2) Octane. These two points are strong and very tempting, but the cons far outweigh the pros (IMHO). Ethanol is very corrosive and hydroscopic. Very very bad, especially if the car sits a lot. I'm not going to get into all the cons here, but just say I personally will never allow it to touch any of my cars since none of them are designed to use it. If you need the octane, methanol is the way to go (says the methanol king on this forum, lol). You nailed the other statement. I went this route with my 4.2 LC. My former 2.3 TVS with a 2.4" pulley made 19.4 psig but had to spin it over blower redline, about 19,000 rpms. My 4.2 makes 21.5 psig with the largest available pulley, a 4.0", which spins only 12,400 rpms at engine redline. Sweet...! I know a guy who has virtually an identical setup as mine, except he uses a 3.25" pulley and he sees 35 pounds of boost...! So on your 4.0, stay with the 4.0"... [/QUOTE]
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2013-14 Shelby GT500
4.0 whippled cammed gt500 on stock block
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