![]() |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
![]() |
stugray |
![]()
Post
#1
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
I have rebuilt a type IV a couple of times, but I was young & naive.
This will be a 2.0L with stock FI for vintage racing. 1 - How do I hook up the stock fuel pump line(s) to a fuel cell? 2 - are there any Cams other than the stock one that will give me increased performance while still using the stock FI? 3 - What compression ratio should I target? I am working that step right now - CC'ing the heads & setting the deck height. 4 - The CAM thrust bearing has just one side with the thrust plate on it. If I recall, when I upgraded my last 914, the guy at the performance shop gave me TWO with the thrust bearing on it (one for each side). Should I be looking for those? 5 - After splitting the case, there were 2 or 3 "bumps" that needed a little "flattening out" with a file. Can the case be damaged by trying to clean up the nasty spots, or is there a way for me to make sure to get it right? I imagine that the only thing I could do would be to remove all the studs and rub each side over some sandpaper taped down to a very flat surface... Any help is appreciated. Stu |
![]() ![]() |
stugray |
![]()
Post
#2
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
Ok, Jake.
I have new valves and purchased your race cam package. Now I am ready to have the heads machined to increase my CR. However, I dont know exactly how much to have the heads cut to increase to ~9.5:1. Is there a known amount that I should cut them? I currently have the stock "slightly dished" 2.0L pistons. So I figure that if I go to ~9.0:1 with the pistons I have, I can adjust the CR down if I want by adding Shims. If I want to go UP, I can change to the flat top pistons, but that only gives me a little. Should I have the machinist go a little extra ( maybe 10:1) so I can always adjust DOWN to what I want? Stu |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 11th May 2025 - 01:50 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |