Pinto Car Club of America

I have the Mikuni sidedraft (4 38mm) conversion. I have heard that different length velocity stacks will change the powerband. Anybody ever experimented with different lengths? If I'm looking for good mid-range what is a good length to start with?

 Greetings,
  My 2.0L '72 pinto has a few mods to the motor: DCOE 40 x 2 , 288 norris cam, Hooker super comp header, 10:1 Trw pistons. It makes great power up to about 6800 rpm, but has no more past 7K . My V stacks are intermediate length. The motor is a former IMSA RS shortblock so the power is restricted by the Cam and  size of the Carbs. Estimated power is around 165 HP, with 185 in reach with DCOE 45's.

It's all in the tuning and mods...

Pintosopher

That sounds a lot like what I'm looking for as far as power.  :lost: How long is intermediate length? 3"? 4"? Did you have to move the brake master cylinder as I did? or did you use a different intake manifold?

 My stacks are about 2" out from the edge of the carb body, they just clear the master cylinder in the stock location. If your car is used for auto x , the real issue is the shape of the "trumpet" on the stack, more than having long length. With your current master cylinder location, you can just about build any air filter and stack  combo. Long shallow radius trumpets give great throttle reponse. Check out TWM induction to get an idea what's out there, or give Esslinger Engineering a call. They were among the first to do Mikuni sets for the Pinto motor. Also check out the GRM magazine article on "Potent Pintos" , to see the difference between 2.0 & 2.3 power for road racing.
Pintosopher