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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.

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.

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.

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.

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

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