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> HELP! before i go crazy
D0ctorg00se
post Oct 31 2005, 02:18 PM
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Ok, so i have a '74 2.0 that was carb converted (unkown single dual progressive) when i bought it 5 years ago. Since then i have done the 009 dist, facet fuel pump, etc. (but of course no new cam, yet). Exhaust is monza quad tip, in good shape no holes. The fuel lines have all been replaced. The car has really been a dream considering i live in Blacksburg, VA and drive it daily. I upgraded to dual delorto's which ran fairly well considering they were used but one actually cracked and began to leak fuel into the crankcase. So i just recently put a pair of brand new dual EMPI, HMPX 44's on and i just can't get em right! Now they are synched and linkage should be fine I have recently adjusted the valves and they should be fine (i keep saying "should" be b/c im no expert and if it could be the problem then it could be). The car starts right up, idles fine (not perfect but good enough) and at full throttle it is fine. It is at part throttle that the trouble arises. Basically unless i push it hard past half throttle it runs like crap. Maybe at like an eighth or less it is ok, like easing off really slow. But as soon as i get on the throttle part way it lags, pops, sputters, hisses, jumps, and just has a fit unless i get on it more or feather it goofily. So i've basically tried the mixture anyway it can be (while still being able to start) rich lean whatever and while sometimes it seems better than others its still not where i feel like it should be with a brand new set of carbs. So someone please help me out no mechanics have ever worked on a 914 down here so i hate taking the car in to have some hilljack screw with it. I havent checked/adjusted the timing or dwell yet but im not sure if i need to. Someone please hook me up with some knowledge. I know you gurus have the uber knowledge i need. Let me know what you think.
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MecGen
post Nov 12 2005, 06:50 AM
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Hi Again

I had the same symtoms, after my 36 dells swap, and a chum had even worse time with his 44 webbs swap.
My dells are becoming absolite, and Empi's would be considered as a replacement. So quoodos on the choice
(IMG:http://www.914world.com/bbs2/html/emoticons/aktion035.gif)
In both the swaps we had basicly the same problems. In his case, back then, downsizing the carb was a phone call away.
Lapuwali, hit it on the nose
QUOTE
32 to 36mm vents would be roughly what you'd want, with 32s better and low-to-midrange, and 36s better for top-end (but you'll still have some poor running at the low-end).
.
The goal here is too set up the carbs for it to run good at idle first and after worry about top end after. With a stock cam, ittle never have it upstairs anyways, might as well keep it comfortable. I had to play with my jets to get really mixed up, trial and error. I soldered the jet full then used the Snap-On jet drill set to play with the sizes. A good piece of advice from GPR, and an extra set of jets, I was in business.
Someone touched on this point...50% of my mid lag problem was do to one carb coming in later then the other. My friend with the webbers reported the same thing

This is what I would do...find a supplier that has dirrect knowledge with Empi. See what can be done to down size your carbs. Ask for a parts list of availible jets and air bleeds. go from there.

This is the bad part, my bud played with his 44s for 2 weeks everyday, because he refused to buy smaller parts.
He could never get it to run right, he caved and went for the 40s (IMG:http://www.914world.com/bbs2/html/emoticons/spank.gif) 44s are a big fucking carbs for a 2.0l even hopped up.
My 2.0l is cammed, his 2.0l wasn't.

I think you are going to need to ask around some type1 places, for info on the Empis. There are good bunch of people, never met a bug person that didn't like a 914. I think you might be a pioneer in the 914 - Empi world.

Anyways good luck with it
+Karma for beating me to the Empi punch

Later

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D0ctorg00se   HELP! before i go crazy   Oct 31 2005, 02:18 PM
ClayPerrine   First thing... an 009 has the wrong advance curve ...   Oct 31 2005, 02:23 PM
D0ctorg00se   Hey, i appreciate it. What do you mean by Dave Dar...   Oct 31 2005, 02:27 PM
ClayPerrine   The Dave Darling "float test"........ Throw the d...   Oct 31 2005, 02:36 PM
SLITS   Damp Dave's "Float Test" is throw it in the ne...   Oct 31 2005, 02:39 PM
ClayPerrine   SLITS... you are old and slow..... I already said ...   Oct 31 2005, 02:42 PM
LvSteveH   To elaborate on what Clay was saying, the 009 has ...   Oct 31 2005, 02:42 PM
SLITS   ht...   Nov 1 2005, 05:30 AM
Joe Ricard   Actually gained power moving from 44 IDF's to ...   Nov 1 2005, 07:17 AM
D0ctorg00se   Ok, so update: i decided to check and see about my...   Nov 10 2005, 07:41 AM
DrifterJay   I might have some Dellorto 40s that a properly jet...   Nov 10 2005, 07:50 AM
Sparky   What are your jet sizes? CAll Empi dealer and expl...   Nov 10 2005, 07:53 AM
9146986   The guys at aircooled.net may be right. I don...   Nov 10 2005, 07:58 AM
SLITS   Go to the library and read about venturi theory......   Nov 10 2005, 07:59 AM
D0ctorg00se   Thanks guys, i'm gonna do all that. I've b...   Nov 11 2005, 12:29 PM
lapuwali   FWIW, I believe the EMPI carbs being referred to a...   Nov 11 2005, 02:11 PM
MecGen   Hi Again I had the same symtoms, after my 36 dell...   Nov 12 2005, 06:50 AM
scotty b   and the Virginia chapter grows stronger MUWAAHHAHH...   Nov 12 2005, 07:42 AM


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