push rods?, why are my push rods shorter |
|
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. |
|
push rods?, why are my push rods shorter |
bernbomb914 |
Mar 6 2004, 07:06 PM
Post
#1
|
one of the oldest Farts on this board Group: Benefactors Posts: 1,873 Joined: 29-December 02 From: Temecula, CA Member No.: 36 |
my push rods spec out a 10.375 inches which is shorter than stock? I am confused as to why they need to be shorter than stock in order to achive proper geometry. Where can I get shorter than stock push rods? the ones you buy that are adjustable can only be shortened .375 inches.
some how some thing is screwed up. parts used: Web cam 163/86b Ceramic lifters 78.8 stroker crank 96mm clynders with .160 spacers swivel ft adjusters 1.7L rockers WTF Bernie |
cgnj |
Mar 6 2004, 10:35 PM
Post
#2
|
Senior Member Group: Members Posts: 634 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
Bernie,
You are close. I'm running the same setup except with a smaller shim (.140). My pushrods are about 10.5 in. I used aircooled.net for my pushrods. Here is how I setup mine. Installed .60 shim. Rotated motor to max at cam and adjusted pushrod to get specified lift. Rotate to half lift. Eyeball the geometry. Repeat adding or subtacting shims or adjusting pushrod to get the proper geometry at half of your net lift. Give up lift to keep good geometry. You may not get the specified lift. I think I was able to get within .015. My pushrods were about 10.5 in. I'm anal, I did every single one. You will need to do at least one intake and one exhaust. Here is a motor that used the .180 shims. STF rocker geometry Check three or four times. Cut once. Carlos |
Lo-Fi Version | Time is now: 27th September 2024 - 12:49 PM |
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 ... |