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SN95 Cobras
Lets do a poll on my dyno#'s
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<blockquote data-quote="scotty98" data-source="post: 16545838" data-attributes="member: 23820"><p>The belt will work with the 2.87, but you will start getting into slip at with that set up. You are going to get into a real big snow ball real quick with pulleys, belts, tensioners, trying to make something work. </p><p></p><p>I know on my set up I ran a 2.75 with an 10% lower and that made 514 rwhp on my street tune at 14 degs of timing with pump gas. My race tune was 101 and 22 degs of timing, number in sig. I went to a 2.75 after I put on the after cooler and only gained 2 psi over my 3.33 I had on before the after cooler set up. I did an 8 rib conversion to eliminate belt slip for the most part. My IAT's were 10 degs above ambient with my ice tank full and a gords heat exchanger. But that set up only pushed off heat soak for so long, as an over spun S-trim is just a giant heat pump. </p><p></p><p>The best advice I can give is run your 3.12 set up, talk to the tuner about timing numbers, and run it. But what you really need to do is get a T-trim, sell your S-trim, and you will be over 500 with the 3.12 all day and not getting out side the efficiency range of that unit. Another option is if you want to keep the S-trim is an 8 rib conversion. If you order all F150 pulleys, the F150 crank pulley is like 7% OD vs the mustang crank pulley. So it's a budget OD lower.</p></blockquote><p></p>
[QUOTE="scotty98, post: 16545838, member: 23820"] The belt will work with the 2.87, but you will start getting into slip at with that set up. You are going to get into a real big snow ball real quick with pulleys, belts, tensioners, trying to make something work. I know on my set up I ran a 2.75 with an 10% lower and that made 514 rwhp on my street tune at 14 degs of timing with pump gas. My race tune was 101 and 22 degs of timing, number in sig. I went to a 2.75 after I put on the after cooler and only gained 2 psi over my 3.33 I had on before the after cooler set up. I did an 8 rib conversion to eliminate belt slip for the most part. My IAT's were 10 degs above ambient with my ice tank full and a gords heat exchanger. But that set up only pushed off heat soak for so long, as an over spun S-trim is just a giant heat pump. The best advice I can give is run your 3.12 set up, talk to the tuner about timing numbers, and run it. But what you really need to do is get a T-trim, sell your S-trim, and you will be over 500 with the 3.12 all day and not getting out side the efficiency range of that unit. Another option is if you want to keep the S-trim is an 8 rib conversion. If you order all F150 pulleys, the F150 crank pulley is like 7% OD vs the mustang crank pulley. So it's a budget OD lower. [/QUOTE]
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Lets do a poll on my dyno#'s
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