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New Edge Cobras
Those with aviator motors
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<blockquote data-quote="IUP99snake" data-source="post: 10612720" data-attributes="member: 7060"><p>I swapped an aviator motor into my car in 2005. Long story short: I had a built motor built based on my 99 engine, but the shop that installed it didn't bleed the coolant properly and overheated it before I had a chance to drive it. Destroyed everything. </p><p></p><p>Strapped for cash and not being able to afford a new built motor from scratch while I waited for my lawsuit to make its way through the court system, I looked for junkyard motors.</p><p></p><p>All the cobra and mach motors were way too expensive. But knowing that an aviator motor is basically the same as a marauder and a mach, I was able to find one CHEAP because the junkyard didn't know it was the same thing. I paid $2,000 for a complete 10,000 mile motor with all the accessories and wiring harness. </p><p></p><p>All I really needed was the long block, I sold everything off it I didn't need and was able to recover $1500 back, so the motor only cost me $500. I sold the aviator intake for $400 bucks, but that was back when the aviator intake was seen as the "poor man's FR500 intake"</p><p></p><p>The swap itself was really easy. I reused my coil covers, cobra intake, cobra front cover (so all the accessories are exactly the same). All I used was the long block. The cobra intake bolts to the later 03/04 heads. </p><p></p><p>The only external differences in the long block are the 6 bolt crank and the exhaust ports that are different on the 03/04 heads vs. the 99/01 heads. Existing headers and manifolds will technically bolt up, but the port shape is different. So, I decided to get a set of used 03 cobra manifolds for 20 bucks. It's all I could afford at the time. </p><p></p><p>For the flywheel, I bought a 6 bolt, 11" aluminum flywheel from Fidanza, that way, I could still use my brand new clutch from the old motor. You could get a 6 bolt mustang GT flywheel if you want, but you'd have a 10.5" clutch instead.</p><p></p><p>The engine runs great. It's got 10.3:1 compression, so it's great for a N/A build. I'm running a procharger with it, so I couldn't go as wild with the boost as I had planned with my forged motor. </p><p></p><p>I had it tuned by Dave Guy of SGS automotive (formerly Kauffmann motorsports) in Dillsburg PA. They did a REAL CONSERVATIVE TUNE. </p><p></p><p>The motor has less peak power on the top end, and makes less peak boost because of the better flowing heads, and because it has a 500 RPM lower redline. With my mods, it's tuned to make 450HP with lots of timing being pulled in the higher RPM.</p><p></p><p>I think this setup is ideal for a centrifugal blower. The high compression, with the better flowing heads, plus cams designed for more bottom end power is great for around town driving and overall driveability, with the blower, which is awesome for top end blasts.</p><p></p><p>It makes about 50 less peak HP, but makes as much as 75 more HP than my other motor as low as 3000 RPM than my 99 cobra motor with the procharger made. </p><p></p><p>Sure, it doesn't have forged internals, but it's lasted 60,000 miles with a good tune and keeps driving great.</p><p></p><p>When the time comes for a rebuild, I'll probably go with a stroker crank in addition to forged internals. I might take the compression a little bit lower, perhaps 9:1 or 9.5:1 so I can really pump up the boost. </p><p></p><p>If you have any more questions, let me know!</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 10612720, member: 7060"] I swapped an aviator motor into my car in 2005. Long story short: I had a built motor built based on my 99 engine, but the shop that installed it didn't bleed the coolant properly and overheated it before I had a chance to drive it. Destroyed everything. Strapped for cash and not being able to afford a new built motor from scratch while I waited for my lawsuit to make its way through the court system, I looked for junkyard motors. All the cobra and mach motors were way too expensive. But knowing that an aviator motor is basically the same as a marauder and a mach, I was able to find one CHEAP because the junkyard didn't know it was the same thing. I paid $2,000 for a complete 10,000 mile motor with all the accessories and wiring harness. All I really needed was the long block, I sold everything off it I didn't need and was able to recover $1500 back, so the motor only cost me $500. I sold the aviator intake for $400 bucks, but that was back when the aviator intake was seen as the "poor man's FR500 intake" The swap itself was really easy. I reused my coil covers, cobra intake, cobra front cover (so all the accessories are exactly the same). All I used was the long block. The cobra intake bolts to the later 03/04 heads. The only external differences in the long block are the 6 bolt crank and the exhaust ports that are different on the 03/04 heads vs. the 99/01 heads. Existing headers and manifolds will technically bolt up, but the port shape is different. So, I decided to get a set of used 03 cobra manifolds for 20 bucks. It's all I could afford at the time. For the flywheel, I bought a 6 bolt, 11" aluminum flywheel from Fidanza, that way, I could still use my brand new clutch from the old motor. You could get a 6 bolt mustang GT flywheel if you want, but you'd have a 10.5" clutch instead. The engine runs great. It's got 10.3:1 compression, so it's great for a N/A build. I'm running a procharger with it, so I couldn't go as wild with the boost as I had planned with my forged motor. I had it tuned by Dave Guy of SGS automotive (formerly Kauffmann motorsports) in Dillsburg PA. They did a REAL CONSERVATIVE TUNE. The motor has less peak power on the top end, and makes less peak boost because of the better flowing heads, and because it has a 500 RPM lower redline. With my mods, it's tuned to make 450HP with lots of timing being pulled in the higher RPM. I think this setup is ideal for a centrifugal blower. The high compression, with the better flowing heads, plus cams designed for more bottom end power is great for around town driving and overall driveability, with the blower, which is awesome for top end blasts. It makes about 50 less peak HP, but makes as much as 75 more HP than my other motor as low as 3000 RPM than my 99 cobra motor with the procharger made. Sure, it doesn't have forged internals, but it's lasted 60,000 miles with a good tune and keeps driving great. When the time comes for a rebuild, I'll probably go with a stroker crank in addition to forged internals. I might take the compression a little bit lower, perhaps 9:1 or 9.5:1 so I can really pump up the boost. If you have any more questions, let me know! [/QUOTE]
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