Turbocharging a type 4 |
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Turbocharging a type 4 |
stownsen914 |
Oct 12 2016, 02:04 PM
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#1
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Senior Member Group: Members Posts: 928 Joined: 3-October 06 From: Ossining, NY Member No.: 6,985 Region Association: None |
I have heard the conventional wisdom that "you can't turbocharge a type 4 successfully." Is it just difficult, or can it really not be done well? I'm tossing around the crazy idea of turbo'ing a type 4 for PCA club racing, to put in the chassis in my avatar. My 6 in its current configuration is not competitive, so I can put a bunch of money in that, or do something different. I like a challenge, so why wouldn't the following work?
- 1.8 or 2.0 type 4 as a base. I would keep displacement stock or close to it. - EFI for induction - Properly sized intercooler and huge oil cooler - A good aftermarket cooling fan - Would be dry sumped - I would work with a knowledgeable builder or shop to build the engine. I am not so familiar with type 4 race modifications, but presumably this would include reinforcing the bottom end, using Carrillo, Pauter, etc. rods - Obviously the heads would need to be reworked for flow and possibly reliability If I do the above, could a type 4 be built to withstand 15 psi of boost and make 350 hp reliably? Scott |
Mueller |
Oct 19 2016, 04:55 PM
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#2
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
TIG welder (AC/DC) = check
Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) |
HAM Inc |
Oct 19 2016, 04:59 PM
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#3
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
TIG welder (AC/DC) = check Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) This is the sort of project that I think would be cool for a highly skilled, well equipped enthusiast. Someone with the know how, the time, and finances to give it a go. You should give this a try. |
Randal |
Oct 20 2016, 12:22 PM
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#4
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
TIG welder (AC/DC) = check Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) This is the sort of project that I think would be cool for a highly skilled, well equipped enthusiast. Someone with the know how, the time, and finances to give it a go. You should give this a try. How much time do you estimate that job would take you in hours Len? Just like to have a baseline of time and or related cost. Thanks. |
HAM Inc |
Oct 20 2016, 02:23 PM
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#5
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
TIG welder (AC/DC) = check Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) This is the sort of project that I think would be cool for a highly skilled, well equipped enthusiast. Someone with the know how, the time, and finances to give it a go. You should give this a try. How much time do you estimate that job would take you in hours Len? Just like to have a baseline of time and or related cost. Thanks. Hi Randal, I have no idea how much time it would take. It's not the sort of job I would be inclined to accept, but if I did it would be quoted on an hourly basis, broken down by categories: design/engineering; fabrication; machine/welding work. There would be some major packaging hurdles to overcome to make this work. I think a better approach would be to adapt 911 heads and go OHC. Mounted on top of Nickies with thermal coatings... That could work. Still lots of challenges, but it wouldn't be a big wet bandaid on a pair of ill suited heads. |
Randal |
Oct 20 2016, 04:05 PM
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#6
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
TIG welder (AC/DC) = check Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) This is the sort of project that I think would be cool for a highly skilled, well equipped enthusiast. Someone with the know how, the time, and finances to give it a go. You should give this a try. How much time do you estimate that job would take you in hours Len? Just like to have a baseline of time and or related cost. Thanks. Hi Randal, I have no idea how much time it would take. It's not the sort of job I would be inclined to accept, but if I did it would be quoted on an hourly basis, broken down by categories: design/engineering; fabrication; machine/welding work. There would be some major packaging hurdles to overcome to make this work. I think a better approach would be to adapt 911 heads and go OHC. Mounted on top of Nickies with thermal coatings... That could work. Still lots of challenges, but it wouldn't be a big wet bandaid on a pair of ill suited heads. That idea sounds like a better approach. And the cams would be reasonably easy to change. (IMG:style_emoticons/default/flag.gif) The "competition" to this would be buying one of the new boxster motors (300 or 350 HP/ 2.0 to 2.5 liters respectively) which will be available at a price less than $15K according to a few people I've talked with that will end up dealing with these motors. But like the 911 heads approach, there would be engineering issues and might require a subframe to work. A 350hp motor in a 914 along with a transmission that would be designed for that HP, would be nice. The water cooling would be an issue and add weight. From what I've read the motors are plus/minus 25# of a fully configured 2.7 (6). http://blog.caranddriver.com/tech-dive-in-...ged-flat-fours/ |
Randal |
Oct 20 2016, 08:58 PM
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#7
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
TIG welder (AC/DC) = check Machine shop = check Certified welder (expired) = check (IMG:style_emoticons/default/smile.gif) (IMG:style_emoticons/default/MDB2.gif) This is the sort of project that I think would be cool for a highly skilled, well equipped enthusiast. Someone with the know how, the time, and finances to give it a go. You should give this a try. How much time do you estimate that job would take you in hours Len? Just like to have a baseline of time and or related cost. Thanks. Hi Randal, I have no idea how much time it would take. It's not the sort of job I would be inclined to accept, but if I did it would be quoted on an hourly basis, broken down by categories: design/engineering; fabrication; machine/welding work. There would be some major packaging hurdles to overcome to make this work. I think a better approach would be to adapt 911 heads and go OHC. Mounted on top of Nickies with thermal coatings... That could work. Still lots of challenges, but it wouldn't be a big wet bandaid on a pair of ill suited heads. That idea sounds like a better approach. And the cams would be reasonably easy to change. (IMG:style_emoticons/default/flag.gif) The "competition" to this would be buying one of the new boxster motors (300 or 350 HP/ 2.0 to 2.5 liters respectively) which will be available at a price less than $15K according to a few people I've talked with that will end up dealing with these motors. But like the 911 heads approach, there would be engineering issues and might require a subframe to work. A 350hp motor in a 914 along with a transmission that would be designed for that HP, would be nice. The water cooling would be an issue and add weight. From what I've read the motors are plus/minus 25# of a fully configured 2.7 (6). http://blog.caranddriver.com/tech-dive-in-...ged-flat-fours/ And by the way, that 350hp motor, will eventually be RE'd and able to make HUGE power like the Subi's. But in the mean time, who has 350hp in a 914 autoX car, together with a Porsche motor? Would sure like that configuration on any NWHA event. |
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