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people with webers chime in
Posted 08 December 2003 - 02:39 PM
please tell me what jets you are runing, if you are using a regulator, return line, stock fuel pump, gas mileage. anything you can think of. i want to compile some info for people trying to get their jetting right(including me).
Posted 08 December 2003 - 03:38 PM
I am running no return line - doesn't seem to matter, and the carb manual said to cap it off.
My gas mileage when the car was 2WD with 175's was about 30 - 32 MPG on the freeway - little less in town. With the big meats I have now, there's no telling what it is. Probably a lot less, but without an accurate odometer, I can't really tell.
Posted 08 December 2003 - 03:58 PM
I am running 140's (they came with the kit)
I AM running a fuel return line
Stock fuel pump
29 MPG or so on the freeway.
Posted 08 December 2003 - 04:06 PM
you guys might be interested to know, jest for S&S carbs for halryes, fit. you gotta cut off half of it, but the threads fit.
Posted 08 December 2003 - 06:53 PM
Running whatever jets came in the carb from Redline. Stock fuel pump, with return line. Since right now my engine is basically running on 3 1/2 cylinders due to very low compression in #1, my fuel economy sucks and performance isn't great. But the weber definitely is an improvement over the hitachi. No real difference in fuel economy, but performance is way up, and the only problem I'm still ironing out is cold start.
Posted 08 December 2003 - 08:21 PM
Posted 08 December 2003 - 08:29 PM
She's running better overall, but I still have some querks. Jets are whatever they sent the Carb with.
I have a Fuel Pressure Regulator installed, and have been playing with the settings on it, and the carb. I do have the return line on it. Wanted to flood out, with out the FPR on it.
Can say that with the colder weather, i've had to turn the FPR up a notch. Mainly because it's wanting to bog down, when I give it gas, but only when it's not up to operating temps.
I do have other issues, but they are related to the engine swap, and can't be isolated to the carb. Lots of things not done quite right on this engine swap, still sorting them out.
Posted 08 December 2003 - 09:18 PM
I've been told that our stock fuel pumps tend to make less pressure as they get older and after 20+ years some make less than 2psi. This might explain why many of our engines run fine with no regulator. Mine with 5psi gave me float spillage. Too much, too little, psi seems to matter.
Posted 08 December 2003 - 10:08 PM
Posted 08 December 2003 - 10:11 PM
Posted 08 December 2003 - 11:20 PM
No return - didn't know I needed one at the time.
Love it! No more difficult startin' when cold out!
Posted 09 December 2003 - 10:54 AM
im way off. i think i was getting 10 mpg:headbang:
Posted 09 December 2003 - 11:56 AM
always had crappy gas mileage 12-15) until I played more with the idle adjustment screw...
general thought on the board was that this circuit wasn't used off idle, but that's not true. the primary jet just adds to the flow. I ended up turning the idle screw out way further than "specs", then re-adjusting everything else. ended up with more power, and better fuel mileage...
my current 82 Grizzly Brat has a eBay ($70) old used weber 32/36 off a 1.9 litre Opel Manta. all I did was replace the accelerator pump diaphram, and install it. never touched jets or idle adjustment at all. no idea what the jets are.
I used the return line fitting from the hitachi carb, and no PR.
it absolutely screams in first and second gear. spins the 27" MT's right now. still pretty decent in 3rd, but 4th it seems like it might be starving for fuel a bit. top end is between 55 and 60 on the speedo (65-70 estimated)
mileage is prob around 20.
since it runs so good in 1 and 2, I've been hesitant to change anything....
Posted 09 December 2003 - 03:04 PM
Posted 09 December 2003 - 03:27 PM
Posted 09 December 2003 - 03:32 PM
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