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The Terminator
Turbo Cobras
Got the turbo bug, Need advice coming from TVS 2.3
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<blockquote data-quote="tt335ci03cobra" data-source="post: 15511445" data-attributes="member: 68944"><p>I'll do my best to answer your questions, then give my advice. I'm at low battery so it'll probably be a post now, and a following post once I can charge up.</p><p></p><p>1. Either will be great for a street car. Either can make 1000whp relatively smoothly. Single 76-80 with an 82-85mm exducer, or twin 58/58-61's would fit a stock 4.6 terminator long block well. Much less expensive to go single, twins seem to get more bragging rights and can spool up a little quicker.</p><p>2. The stock blower cams in our cars aren't overly aggressive, a nice inexpensive replacement are 98 cobra cams. Custom turbo grinds matched to boost range and desired rpm will make a 30-75+whp difference and then some if you go over 20psi. If it's under 15psi, proper cams degreed well with nice head work are still worth at least 25-40whp. And then some. Pricy work though, can easily go into the $3-5k range...</p><p>3. Air counts is more what you mean IMO. I'll spare the comparison of what boost is and assume you mean what boost level (relative to a properly sized turbo system for our cars) will be possible on pump gas. With factory compression, 15psi is very safe, and very potent. 18-19psi can be done, but you'll be well into the 750whp range and nearing 800whp to be honest. And as I'm guessing you know, a 500whp turbo cobra feels like a 600whp sc cobra... You'll probably find yourself doing what I do and cruising around on the lowest boost setting your boost controller allows. It's surprising how much punch a turbo car has even on 5-10psi...</p><p>4. Iat's are crucial to making power. And properly done, a turbo car will be epic for nice iat's. I did some pulls the other night and my iat's dropped from 50* to 34* after the pulls. I'm on pump gas but run a dual in dual out intercooler with custom plumbing and an oil cooler. To say it mildly, it's easier to get low iat's with a turbo setup if you size things well and put in the time to learn and understand how to spec a build. The killer chiller can be modified to fit a turbo application, it requires different pieces though. They have kits for turbo cars on their website. They build chillers for many vehicles. I don't think reusing the heat exchanger you have from your blower setup would be ideal. You'd need to weld in and out ports, etc. better to just sell it and buy a proper unit. Spec it to what you'll need, going to big just slows airflow and reduces velocity, with no cooling gain.</p><p></p><p>5. Plan on $15k. For a seasoned and versed turbo wiz, it can be as low as $5k or less with used pieces, maybe even $3k or less. For a first time, plan $15k. If you end up under $10k, you did excellent.</p><p></p><p>7. Quite a few, I'll touch on them when my phone is charged.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 15511445, member: 68944"] I'll do my best to answer your questions, then give my advice. I'm at low battery so it'll probably be a post now, and a following post once I can charge up. 1. Either will be great for a street car. Either can make 1000whp relatively smoothly. Single 76-80 with an 82-85mm exducer, or twin 58/58-61's would fit a stock 4.6 terminator long block well. Much less expensive to go single, twins seem to get more bragging rights and can spool up a little quicker. 2. The stock blower cams in our cars aren't overly aggressive, a nice inexpensive replacement are 98 cobra cams. Custom turbo grinds matched to boost range and desired rpm will make a 30-75+whp difference and then some if you go over 20psi. If it's under 15psi, proper cams degreed well with nice head work are still worth at least 25-40whp. And then some. Pricy work though, can easily go into the $3-5k range... 3. Air counts is more what you mean IMO. I'll spare the comparison of what boost is and assume you mean what boost level (relative to a properly sized turbo system for our cars) will be possible on pump gas. With factory compression, 15psi is very safe, and very potent. 18-19psi can be done, but you'll be well into the 750whp range and nearing 800whp to be honest. And as I'm guessing you know, a 500whp turbo cobra feels like a 600whp sc cobra... You'll probably find yourself doing what I do and cruising around on the lowest boost setting your boost controller allows. It's surprising how much punch a turbo car has even on 5-10psi... 4. Iat's are crucial to making power. And properly done, a turbo car will be epic for nice iat's. I did some pulls the other night and my iat's dropped from 50* to 34* after the pulls. I'm on pump gas but run a dual in dual out intercooler with custom plumbing and an oil cooler. To say it mildly, it's easier to get low iat's with a turbo setup if you size things well and put in the time to learn and understand how to spec a build. The killer chiller can be modified to fit a turbo application, it requires different pieces though. They have kits for turbo cars on their website. They build chillers for many vehicles. I don't think reusing the heat exchanger you have from your blower setup would be ideal. You'd need to weld in and out ports, etc. better to just sell it and buy a proper unit. Spec it to what you'll need, going to big just slows airflow and reduces velocity, with no cooling gain. 5. Plan on $15k. For a seasoned and versed turbo wiz, it can be as low as $5k or less with used pieces, maybe even $3k or less. For a first time, plan $15k. If you end up under $10k, you did excellent. 7. Quite a few, I'll touch on them when my phone is charged. [/QUOTE]
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Got the turbo bug, Need advice coming from TVS 2.3
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