weber 32/36 vs weber 38

[austin]

I want to get everyones views on which carb is better. I am going for power, as much as I can get. I know the 38 will make more power, but is it all on the top end? Or does the 32/36 make almost as much power, but but low to mid range where i can use it better. Fuel economy means nothing to me, I just want as much power as I can get. I want to see what this engine can do.

[austin]

Also, this will be going on a rebuilt engine with a header, 2 in exhaust, and a fuel ice can. It has all stock internals though.

[LethalEthan]

my weber 38 seemed to add to midrange/high end power, in the rpm range anyways. Speed wise it's still mostly low end to mid.

[austin]

From my research I have found that the 38 and the 32/36 perform the same from midrange to redline. Off idle is where the 38 trumps the 32/36. If the engine is modified you have to jet the 32/36, the 38 will bolt right on and run with no issues. The 32/36 will give you better fuel economy, but the 38 will give you the same fuel economy as the factory carb. Either way you go you can't go wrong.

[79D50]

The 38 is better on the low end hands down, and also on the mid to high end. Keep in mind the 32/36 was built for replacement of the stock mikuni. The 38 was never designed just to bolt right on a stock engine and perform to your wildest dreams. It was designed to accomodate an engine build to include:

1. Port and polished head
2. Hotter CAM
3. Flat Top Pistons on a .30/.40 bore
4. Headers + performance exhaust

etc etc etc.....This is where that 38 at 426 CFM will rock at low/mid and high end. Your torque at low end with the above mentioned motor work will be 100% better than stock. The 32/36 has better fuel economy. The 38 does not have good economy as it was designed for power. The 38 does not get the same MPG's as a stock mikuni. On my 2.6 I am looking at 12-15 MPG. The stock mikuni got me 22.

--Paul

[LethalEthan]

i get about 16-20mpg on my isuzu 2.3L with the 38. Only thing i have is ram air intake, and catback exhaust.