can somebody give me a crash course on carbs Options

[scotty b]

QUOTE (bd1308 @ Jun 28 2005, 06:52 PM)

if ya know latin (or lets say italian to be more applicable) you'll pick up more chicks... chicks dig a guy who knows how to work on carbs.

(IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/chair.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/chair.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/spank.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/slap.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/alfred.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/sheeplove.gif) NUFF SAID!!

Britt I'm currently running Webers and F.I and I can tell you the #1 & #2 bank has the F.I. and runs ALOT smoother; but the #3 & #4 bank with the carbs, while it idles a little rough and has some hesitation, it does rip at WOT. Of course I did install a 1/2 cam to be able to run this setup.

[Trekkor]

Scotty, go easy... (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)

KT

Running both... (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif)

[nebreitling]

i don't know what bowlsby charges for a harness, but it's got to be less than a set of carbs, linkage, pump, etc. even used.. and less learning curve, by a factor of about 10.

either way you can learn.

[bd1308]

QUOTE (bperry @ Jul 4 2005, 05:40 PM)

Britt, So tell us. How'd it work out with the carbs? What did you end up with? --- bill

ended up with a 2 barrel carb (single)....works SO GREAT! and it's progressive so it rips when i stomp on it. I have the 1.7 now. This setup is fine for the 1.7 (a bit rich) but i'll need to go balls-to-the-wall with my 2.x rebuild.


flame away

[Trekkor]

No flames here.

Remember the goal is to enjoy driving the 914.
If you can safely do that, congrats are in order.

KT

[bd1308]

i dont know any better than what i have....and HOLY COW do i notice a difference.

its night and day....sounds real throaty and porsche-like between 3-4k and up.....i can hear the sound i never knew existed with the 914...the slight whine from the engine. (read good whine....) sounds impeller related. OH and I CAN HEAR MY VALVES!!!!!

thank you all very much

(IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[nebreitling]

good deal. not driving your car sucks. glad it's making race car sounds, if not performance, now.

[dwillouby]

Britt,

Good luck with the carb setup. Best to be a bit rich for the street. I had a single carb setup on my first 1.7 car. Ran great. I have messed with carbs for years. I dont trust FI very much. Carbs are simpler to fix on the side of the road outside of nowhere USA.

I can fix all of your problems with a simple V8 swap!

David

[bd1308]

that 350 setup looked wild. And you even kept the 901 too. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

[tat2dphreak]

(IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) congrats man... whatever gets it on the road!! it's better to hear that you aree running it, than just being aggrevated with it...


this is the first I've heard of a single carb running RICH... usually they run way lean... also, in the winter, remember the manifolds won't get warm enough, so don't let the engine die...

[Joe Ricard]

Britt are you still planning on coming down here for my 1.7L ????
Let me know soon. Plus I will give you a ride in my car and show you real race car sounds. 40 IDF's through long intakes and Bursh with a one hell of a big cam. Promise to scare the begeebies out of you. Then you will take that single carb and chuck it in the shit can where it belongs.

Race car sounds (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/chairfall.gif)

[bd1308]

joe i'm up to it. I have to find a day when i can travel a long time to come see you.

[dwillouby]

I might be able to scare you in my car. I could scare us both if I drive.
David

[bd1308]

(IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) I can't even imagine how scared I would be if I drove a 350 V8 914....

[bd1308]

QUOTE (tat2dphreak @ Jul 5 2005, 08:02 AM)

(IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) congrats man... whatever gets it on the road!! it's better to hear that you aree running it, than just being aggrevated with it... this is the first I've heard of a single carb running RICH... usually they run way lean... also, in the winter, remember the manifolds won't get warm enough, so don't let the engine die...

cold manifolds huh? I'd rather have cold manifolds rather than trying to crimp Fi trigger point connections in windy and cold weather....while it's snowing. That blew huge. I'm sure glad I had extra crimp connectors, cause I'd br screwed.

[914GT]

QUOTE (bd1308 @ Jul 5 2005, 10:58 AM)

(IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif) I can't even imagine how scared I would be if I drove a 350 V8 914....

You might be scared, but you'll have a shit-eating grin on your face at the same time. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

[IronHillRestorations]

ummmmm, back on topic anyone?? Now that's a thought (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

Here's the post I made back in Sept of last year when Trekkor was having carb tuning problems, now he's a carb GURU!!!

Also note these instructions were for the 3 barrel Webers, so you'll have to adapt & survive.



Assumptions: the carbs have the optimum jet and venturi package (good luck on this one), the float level in the carbs is correct, the cams are correctly timed, the valves are properly adjusted, the ignition timing is dead on, you have the proper spark plugs for your engine, the linkage is good, the fuel is good, the engine is good.

Remember that the mixture and air bypass adjustment screws are precision needle valves, not head gaskets. Use your fingers to tighten them, not your fist.
Start and warm up the engine.
Make sure the two drop links for the throttle linkage are exactly the same length, and disconnected. You can use a 8mm thin igntion wrench to snap them off.
Turn the mixture screws all the way in and then 5 half turns out.
Turn the air bypass screws all the way in.
Turn the idle speed screws out til it just touches, and then in 5 half turns.
Put on your hearing protection and start the car.
Use your STE and find the barrel that pulls the most. We'll call this one baseline.
Balance the barrel in the other carb that pulls the most with the idle speed screw. (if you have a Uni-syn, give it to someone you don't like and purchase a STE airflow meter)
Go back to the other carb, with the baseline barrel. You will have one all the way in, then use the air bypass screws and balance the other two barrels.
Go to the other carb and do the same thing.
Snug the jamb nuts on the air bypass screws.
All six barrels should pull the same amount of air at this point, if not repeat air adjustment proceedure.
Snap the throttle linkage drop links back on the carbs. If the idle changes then you need to barely adjust the linkage mounts so snapping the drop links on, doesn't change the side to side idle balance.
Use the hand throttle or a vice grip and rag to lock the linkage between 1400 and 1800 rpm.
Start back at the baseline barrel and adjust the mixture screw in or out, to get the smoothest running and highest idle, then turn it in 1/4 turn.
Do the same with the five other mixture screws.
If you have to turn the mixture screws more than two turns either way, you've got the wrong jets.
Recheck side to side and individual air balance, adjust as needed.
Road test the car.
If you get snapping and poping out the intake, it's generally a lean condition.
If you get heavy exhaust fumes, or pboofing out the exhaust it's probably too rich.
If you get a flat spot or popping out the intake at between 2800 and 3200 rpm, you probably need larger idle jets.

That's a rough, five minute draft of my carb tuning proceedure, hope it helps!

If it goes good it should take about 45 minutes, if not about three years.

PK (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif)

[Joe Ricard]

pboofing out the exhaust

Is that a technical term? (IMG:http://www.914world.com/bbs2/html/emoticons/chairfall.gif) or the sound it makes while running too rich?

Britt you might wanna take notes. and copy this somewhere.

BTW if'n you want carbs I can get you into some 40 IDF's pretty cheap.
Let me know when you expect to come down here for the RUNNING motor.

[bd1308]

QUOTE (Joe Ricard @ Jul 5 2005, 01:24 PM)

pboofing out the exhaust Is that a technical term?   (IMG:http://www.914world.com/bbs2/html/emoticons/chairfall.gif)  or the sound it makes while running too rich? Britt you might wanna take notes. and copy this somewhere. BTW if'n you want carbs I can get you into some 40 IDF's pretty cheap. Let me know when you expect to come down here for the RUNNING motor.

I could take off a weekend to come down and talk about the engine. I like this carbs stuff....

(IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

I just need to sell a computer ( (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) ) so i can get some gas $$....

[bperry]

Britt,
Do you know if you got the electric choke unit?
The single carb setup does get pretty testy when its cold. If you didn't
get it, you may want to look into it since it does get fairly cold
in your neck of the woods.
It will help the initial idle quite a bit during warm up especially when
the air temperature is fairly cool/cold.

--- bill