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dale73914 |
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Member ![]() ![]() Group: Members Posts: 209 Joined: 15-September 11 From: Victoria, Australia Member No.: 13,562 Region Association: Australia and New Zealand ![]() |
Hi All,
Rather than trawl for hours ( and i know the info is probably here ), i just thought i would ask. My 1973 is a 1.7 , running original injection. Motor is in good running condition, however as is always the case i would like a bit more oomph... Now i'm pretty new to type4 engines, and know very little about them, aside from performing basic maintenace tasks. I've worked on most of my cars over the years, but this is only my second aircooled ( used to have a 73 911E 20'ish years ago that ended up as my house deposit (IMG:style_emoticons/default/sad.gif) , but it was serviced by a Porsche dealer) If i wanted to replace the 1.7 , or upgrade it to a 2.0 or 2056 ? ish sized motor, can i use the original block, the injection etc, or does the whole lot get replaced with a later model 2.0 system. I dont want to go to carbs if possible, and would prefer to retain the standard look. Or is there work i can do to the 1.7 possibly to make it that little bit quicker ? Given i'm also in Australia, hunting for the right parts, and advice is not as easy as it is in the US. It is just a dry weather Sunday car, i have no plans for any type of motorsport with it, i just want a bit more off the line performance. Cheers Dale |
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jcd914 |
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California ![]() |
I don't know what McMark might want to turbo a 1.7 but I rode in his at WCR and it performed very well, probably not quite like a 2270 though.
It would definitely be something I would consider if I had a running 1.7, instead of a 2.0. As far as upgrading a 1.7 you can make a relativly simple and cheap jump to a 1911 by going to 96mm P&Cs. The 1.7 heads have to be opened up to fit the new cylinders but a machine shop can do that while they do some valve work that your heads probably need anyway. Using the stock 1.7/1.8 crank and rods with 96mm pistons & cylinders make a nice peppy 1911cc engine that is very drive-able. Your existing FI, intake, exhaust, etc is all compatible with this upgrade. Jim |
ConeDodger |
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Apex killer! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 23,626 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California ![]() ![]() |
I don't know what McMark might want to turbo a 1.7 but I rode in his at WCR and it performed very well, probably not quite like a 2270 though. It would definitely be something I would consider if I had a running 1.7, instead of a 2.0. As far as upgrading a 1.7 you can make a relativly simple and cheap jump to a 1911 by going to 96mm P&Cs. The 1.7 heads have to be opened up to fit the new cylinders but a machine shop can do that while they do some valve work that your heads probably need anyway. Using the stock 1.7/1.8 crank and rods with 96mm pistons & cylinders make a nice peppy 1911cc engine that is very drive-able. Your existing FI, intake, exhaust, etc is all compatible with this upgrade. Jim Mark has turned the boost up a bit since then. He was running 6psi which is less than most factory systems just to make sure he didn't need a ride home on a trailer. |
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