jonas Posted May 27, 2007 Share Posted May 27, 2007 i finally got my weber on! still got some fine tuning to do. not much top end power, actually seems kinda doggy past 50. was dieseling really bad w/timing set at 8 degrees. bumped it to 8.5 to a light 9 and it got better, still dieseling just not as bad. i'm going to bump it to a solid 9 degrees tomorrow and see what happens. i also think my lack of top end is due to it running too lean. i'll work on that tomorrow also. no vac leaks so i know i'm just at the fine tuning stage. i'm tired and i want a beer. Quote Link to comment Share on other sites More sharing options...
jonas Posted May 27, 2007 Author Share Posted May 27, 2007 ok got the timing set to a solid 9 degrees. dieseling is practically gone now, stilll does it every now and then and only for a sec. now i'll just focus on idle/mixture set up and hope that cures it. still got great bottom end response but top end still seems to be holding back. *sigh* :-\ Quote Link to comment Share on other sites More sharing options...
hatchsub Posted May 28, 2007 Share Posted May 28, 2007 your not going to have any top end improvement over the hitachi. at least not much. Its in the low end that your going to feel it. Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted May 28, 2007 Share Posted May 28, 2007 If you were in it for top end, you should have gone spfi. The weber gives a good torque boost but not a big horsepower difference. Quote Link to comment Share on other sites More sharing options...
Tom63050 Posted May 29, 2007 Share Posted May 29, 2007 i finally got my weber on! still got some fine tuning to do. not much top end power, actually seems kinda doggy past 50. was dieseling really bad w/timing set at 8 degrees. bumped it to 8.5 to a light 9 and it got better, still dieseling just not as bad. i'm going to bump it to a solid 9 degrees tomorrow and see what happens. i also think my lack of top end is due to it running too lean. i'll work on that tomorrow also. no vac leaks so i know i'm just at the fine tuning stage. i'm tired and i want a beer. Here are some Weber jetting settings for you to compare with: .............................Primary........Secondary Main (fuel)...............140.............140 Idle.............................60..............55 Air correction...........165.............160 In the back of my Weber book it says that high-altitude jetting changes are as follows: 0 - 5000 feet, no change 5000 - 6700 feet, drop main jets by five (e.g. 140 becomes 135) 6700 - 10,000 feet drop main jets by five more (135 becomes 130) No changes mentioned to air correction jets or idle jets. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted May 29, 2007 Share Posted May 29, 2007 If you were in it for top end, you should have gone spfi. The weber gives a good torque boost but not a big horsepower difference. SPFI doesn't do anything for top end either. For that, you need a cam change. GD Quote Link to comment Share on other sites More sharing options...
jonas Posted May 30, 2007 Author Share Posted May 30, 2007 hey, things are looking good. i realize i'm not driving a race car. i swear my milage has gotten better. thats how bad my hitachi sucked.. just a matter of adjustment now. still getting some dieseling (timing should fix that) and a little bucking, again just some adjustment. i WILL move forward!!! Quote Link to comment Share on other sites More sharing options...
monstaru Posted May 30, 2007 Share Posted May 30, 2007 9 times out of ten your top end is due to lack of cable or something wacky with the linkage. .cheers, brian Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted May 30, 2007 Share Posted May 30, 2007 SPFI doesn't do anything for top end either. For that, you need a cam change. GD I think you could agree that the spfi swap even without a cam would give better power up top that a carb. Quote Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted May 30, 2007 Share Posted May 30, 2007 The dieseling can be solved if you buy the fuel shutoff solenoid. Cant remember the part number, i believe Mick has gotten it. The timing may help as well, but it is not the cause. Also, a fuel pressure regulator may help things as well. I believe the Weber only requires 3.5psi of fuel pressure. -Brian Quote Link to comment Share on other sites More sharing options...
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