 Big Bore Kits |
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| PORobinSCHE |
  Dec 30 2006, 09:33 PM
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#1
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Member  Group: Members Posts: 421 Joined: 22-July 06 From: Orlando,Fl Member No.: 6,484  |
is there a big bore kit that will drop into a 1.7 litre motor. one that doesn't require machining?
thank you Robin |
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Replies(1 - 5)
| G e o r g e |
Dec 30 2006, 09:36 PM
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#2
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Dr Group: Members Posts: 1,905 Joined: 20-September 05 From: Southern Cal Member No.: 4,832 Region Association: None 
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QUOTE(PORobinSCHE @ Dec 30 2006, 07:33 PM)  is there a big bore kit that will drop into a 1.7 litre motor. one that doesn't require machining? thank you Robin you will have to get your heads cut to fit 96 mm P and C's or pick up some 1.8 heads the p and C's already fit |
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| Jake Raby |
Dec 30 2006, 10:00 PM
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#3
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
ALL CASES ARE THE SAME- 1.7-2.0!!!
The difference is the crank, rods and pistons.. The head registers are 100mm on the 1.7 and 105mm on the 1.8 and 2.0 heads... I recommend using our 96mm big bore kit for the 1.8 engine and replacing your heads with 1.8 units- all interchangeable with larger chamber volumes, bigger ports and bigger valves! Stay away from the 96mm kits for the 1.7 head register they are thin and very problematic. You CAN open the 1.7 heads from 100 to 105mm, but you'll still have smaller valves ports and chambers, all of which iompeded efficiency of the combo.. |
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| McMark |
Dec 30 2006, 10:01 PM
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#4
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Not quite George. There is a 96 mm piston and cylinder set that will drop into a 1.7. There are two issues with doing this, the cylinder heads, as mentioned, and the wrist pin height. If you try to put pistons designed for a 2.0 onto a 1.7 you will have deck height issues. You must get pistons designed for a 66 mm stroke crank (stock 1.7).
I believe these are the right ones but you should email them to make sure before ordering. |
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| G e o r g e |
Dec 31 2006, 06:04 PM
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#5
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Dr Group: Members Posts: 1,905 Joined: 20-September 05 From: Southern Cal Member No.: 4,832 Region Association: None
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Mark thanks for the clarification
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| 914werke |
Dec 31 2006, 11:28 PM
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#6
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"I got blisters on me fingers" Group: Members Posts: 11,248 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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Do a search an "1911". Its a pretty decent upgrade (IMG:style_emoticons/default/smile.gif)
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