chuckster

I'm having considerable trouble with my FI. <img border="0" alt="[crying]" title="" src="graemlins/crying.gif" /> Haven't given up completely on fixing the FI problem... yet. I wont bore you with details of the FI. I would like peoples experience/opinions with the conversion to Weber. This is a 914 2L hoped to be used in ITA. No engine modifications at all. I realize technically the Weber isn't legal for ITA but I don't think I'm going to be any threat to winning regional ITA. I doubt I will ever finish on the podium. Comments would be much appreciated.

Thanks,

Chuckster

hoffman912

i think 32's will deffinitly be too small, and so will 36's. you probably want 40s or 44's. im not sure.. but thats my guess. (someone correct me if im wrong)

whats wrong with the fi? is it the bundle? i know thats what a few of the 912E's have had probs with.

check out the 912 buliten boards bbs912.org
and ask them what they think or suggest as far as the FI. there are a number of 912E and t4 conversions who have FI and carbs. ask them for help on the FI, and im sure they can come up with some help. ask Tony Bray or Dave Lovato if they have any suggestions. there is a texas region board there, but its probably best to ask on the so cal or bay area board as there are more people in those areas.

Dave Lovato just got his bundle restored, and repaired after alot of probs. Tony Bray has webbers on his t4 conversion.

(if all else fails and no 914 guys answer at least they can give you suggestions)

post 930!!
i always wanted a black one with tan leather interior growing up. couldnt find pics of one like it <img border="0" alt="[crying]" title="" src="graemlins/crying.gif" /> oh well these shall do
<img src="http://joshua.micronet.it/porsche/galleria/930.jpg" alt=" - " /> <img src="http://vista.pca.org/stl/19779302.jpg" alt=" - " /> <img src="http://gallery.rennlist.com/albums/albuo69/930_rightrear.thumb.jpg" alt=" - " /> <img src="http://gallery.rennlist.com/albums/albuo69/930_rear_001.thumb.jpg" alt=" - " /> <img src="http://gallery.rennlist.com/albums/albuo69/930_leftside1.thumb.jpg" alt=" - " />

if you guys think these look good.. you should check out the ones i did for post 914 and 916! (even have a 914 beating the crap outta a 911 in a race in one pic on the 914th post, which i know you guys would drool over!)

heres a link to post 916.. beautiful car <a href="http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic;f=28;t=001091;p=6#000138" target="_blank">http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic;f=28;t=001091;p=6#000138</a>

heres post 914 for you guys.. (i KNOW you will love this one!) <a href="http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic;f=15;t=022904" target="_blank">http://forums.rennlist.com/forums/ultimatebb.php?ubb=get_topic;f=15;t=022904</a>

thought youd like to see those... yes im nuts for posting every porsche model as i post that number.

Joe R

I think you are talking about a Progresive 2 barrel. I had a 36/32 on my bug which was better than the single Zenith.
This 36/32 will be a dog. on a 2.0L Type IV
Look for some 40 IDf's. A pair of these and you will be very pleased. I went from 44 IDF's to 40's and picked up alot of bottom end torque. Still have the 44's, I don't recommend them unless you hop up that motor somemore. (alot)?

hitbyastick

Hoffman, your posts are cool man.

You should probably bore us with the details of your EFI problems. I've been up and down mine and I'm pretty confident with the D-jet setup, and I know who I can ask for the L-jet.

Geoff

Post the problems here or at the 914club.com and we will try to help sort out the Djet for you.

The progressive Weber set up sucks big time and is a joke.
Dual Webers or Dells works pretty well IF you change the cam to a Webcam 86. The stock FI cam sucks with Duals.

Geoff

chuckster

Thanks for the input guys. Well I will bore you some of the details if you insist. The car is leaning out at higher RPMS. I have changed the FI harness, computer, new TPS, put in new injectors. Have put in a known good atmosphere meter. The head temp sensor is on variable resistor so I can fine tune the air-fuel mixture. I have disconnected this and inserted a resistor substitution box. At idle and the resistor box set at say 200ohms the car runs fine. Under heavy load the car begins to get leaning out popping and also begins to miss. When I put in high resistance (2000 ohms) the car runs very rich at idle and under load runs strong, no missing up to about 5000rpm.
5000rpm is my redline so I dont care if it misses at higher than 5000rpms.

I have had lots of help on all these diagnostic tricks including changing the trigger points checked the fuel pressure it is steady if a bit low (29.5psi) through heavy load.

I and others have torn this thing apart so many times, I cant remember if I have checked some simpler things such as the little injector rings at the head. This very well could be the problem. But honestly cant think of anything else to do or check.

I have access to a test carb. off of a '70 914 and will try that. If this fixes the problem, I will put the carbs on. Something my sister thought of which was a crimp in the fuel line. I suppose we could have good pressure and not enough volume.(?)

I do appreciate the input. Any thoughts or experiences would be great. Someone else mentioned the duel 40's. Which does seem to be the set-up.

Thanks again for the suggestions.

Chuckster

Joe R

Who said sisters aren't smart. Sounds like a easy thing to check. The gas lines do make some sharp turns as they come out of the fire wall tube and snake up through the tin. Could have also delaminated inside. never see it unless you put a flow meter of some sort on it.

Trust me

Stick with the fuel injection! More problems with carbs. How can ALL of those German engineers be wrong?
Hitbyastick, A been-laid woman ain't got no sole.LOL

Troy

chuckster

I'm not too anxious to spend more money. And its a bit embarrassing that something as simple as a 914 is beating me. I must be missing something easy. It has been suggested that I may have a known good part that is not. Tomorrow is another weekend day and I can go over everything one more time. I will let you know if I find the problem. Thanks again for all the input.

Chuckster <img border="0" alt="[thumbsup]" title="" src="graemlins/bigok.gif" />

Trust me

Think maybe not the injection and a loose stud? When the engine warms up and is put under strain things loosen up. Put your hand over the tail pipe a little when the car is warmed up. See if you can see it popping around the heads and cylinders.

Troy

7391420

I've had my 73 2.0 set up with dual webber 40's and it's been great. Good MPG, starts cold, hot, and runs very well. I do get a bit of pop on decel when it's really hot out, but generally the car runs really well.

I was going to return the car to FI when I first got it but upon listening to advice from several mechanics I decided to see if after having the carbs tuned properly the car would run well. In short, it does and I dont have any of the various problems associated 30 year old electrical components that the FI system can have...

That being said, I would guess that if you can sort the FI system out it will run cleaner and more smoothly with FI,

chuckster

I want to thank everyone for the comments and suggestions. I simply have not had access to my car. So no opportunity to continue on diagonsis.

Welcome and congrats to 7391420 for joining rennlist. It's good to hear of 914s that are doing well on Webers. I have heard many horror stories of the difficulty making dual webers work. I have also seen 914s that run really strong. I would prefer to have the FI working properly.

There have been some really great ideas on which direction to take the diagnostics. But I have to get access to the garage. Again thanks to all.

The Chuckster
'74 914 2.0 Track Car (eventually)