Type 4 rebuild questions |
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Type 4 rebuild questions |
mepstein |
Nov 19 2018, 08:14 PM
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#1
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914-6 GT in waiting Group: Members Posts: 19,578 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
What can I do to rebuild my 1.7 for more HP and torque but keep the original d-jet.
piston and cylinders crank camshaft heads ? I know I can't change the cam too much but is there one that will do better and still work with d-jet. I know there is modern FI but I'm not interested. No carbs. I'm not looking for all out HP or dropping 10K on an engine kit. I just want a nice bump in power, if possible, while keeping a stock looking engine. |
Alapone |
Nov 20 2018, 11:09 AM
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#2
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Member Group: Members Posts: 108 Joined: 4-April 13 From: Nj Member No.: 15,734 Region Association: None |
Just curious, has anyone built a motor with a 66mm crank and 100 or 101mm or larger pistons, like a short stroke 2.1. Is it possible? what would the characteristics of that set up be>?
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Mark Henry |
Nov 20 2018, 05:16 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Mark (E) I'm doing a similar build right now. 2056, webcam, Hoffman heads, and stock-djet. Not to contradict Mr. Henry (who has a world more experience than I will ever have), but I thought something like this was good for north of 110 hp. Maybe anything less than 200 to Mark (H) just looks like 100-ish (IMG:style_emoticons/default/smile.gif) I guess we shall see. No, I consider myself as a realist...I find hany HP claims to be exaggeration, or to be more PC let's say "overly optimistic". (IMG:style_emoticons/default/biggrin.gif) 1.7 djet FI cam with 96mm P&C's and headers, I very much doubt if you could break 100hp. I do have a set of nos mahle 94mm P&C's. Also have a 2.0 crank. I don't know if either of these will fit or work to improve power. I was hoping to see 100 but I realize the stock 1.7 d-jet has limitations. Weight reduction (of the car) will also help to increase performance. Mark the 2.0 piston have a different pin to deck height, by eyeball at least .200". You will find the 1.7/1.8 vs 2.0 rod length to be different a corresponding amount. Even 15% is a huge increase, factor in the weight reduction and it would make a fun 914. Just curious, has anyone built a motor with a 66mm crank and 100 or 101mm or larger pistons, like a short stroke 2.1. Is it possible? what would the characteristics of that set up be>? It could be done , but at the dollar level this engine will cost to make good HP on a stock motor it wouldn't give enough reward for the bucks. Again there's no replacement for displacement. |
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