6/carbs: ? about tall 2ndary venturi's, rich, I miss you. |
|
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. |
|
6/carbs: ? about tall 2ndary venturi's, rich, I miss you. |
brant |
Nov 3 2005, 11:50 AM
Post
#1
|
914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
carbs: ? about tall 2ndary venturi's
Hi all... thanks for the help in advance. I want to try a set of the tall 2ndary's on my IDS-3C carbs. I'm running the stock ones and want to try the tall ones, that I've heard called "906-style" its a race car and withoug re-hashing all of my jetting and dyno history, my questions are: 1) pierce manifold says they have 2 different types in stock a 3.5 size and a 4.5 size. I believe this measurement is in reference to bore and not height. Pierce said that both sizes are the "tall" type. Which do I want? Motor is a 1967 2.0/S motor at altitude. (the pierce catalogue references that the IDS carbs came with 4.5 short, but I'd like confirmation before I order) 2) Does anyone know if these tall secondaries interchange on the IDA carb versus the IDS carb. I would assume so, but I once bought some F33 emulsion tubes from Pierce that do fit the IDA, and found that they would not fit the IDS. I didn't know there was that much difference between the two carbs, which surprised me. But again, before I order do people know if the 906-type tall 2ndaries will fit an IDS-3C body? again, thanks in advance everyone! brant |
J P Stein |
Nov 3 2005, 07:07 PM
Post
#2
|
Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
The only place I've actually seen this was on a running 2 stroke dirt bike with the air box removed. There were 2 "standing waves" of fuel one about 1.5 inches and the other about 3 inches from the throat of the carb. Facinating the way they moved in & out , formed & deformed depending on the throttle opening.
Then I was reading a thing on the Pooper. Pete Lovely said that he had to form a air box out of a soft drink cup to keep the wind (at speed) from blowing away the reversion......or the car would run like crap. When you get (as I see it) the standing waves of fuel bouncing around in an air cleaner (not enuff room overhead), it raises hell with the working intake system harmonics. Note: there is a lot of conjecture here. (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) |
Lo-Fi Version | Time is now: 2nd June 2024 - 05:03 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 ... |