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.

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* :-\

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.

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.

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.

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

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!!!

9 times out of ten your top end is due to lack of cable or something wacky with the linkage. .cheers, brian

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.

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