Originally Posted by 13BTNOS' post='676491' date='Feb 23 2005, 10:44 AM

I use the 600cfm holley carbs for GM's with the prefix p/n 1850. You can't just slap a carb on a rotary and expect it to work properly. The carbs I use are vaccum secondary and I convert them to mechanical. I use a Racing Beat intake and open the plenum up. I drop it down 1/2in and blend it all in and use a 1/2in spacer for N/A motors or for Nitrous motors I use a plate system. The power valve is blocked and the secondary metering plate is modified. This setup is meant for track cars, drag racing, you can use it for street use but there is a slight hesitation when it transitions into the secondaries. But for drag racing it is great the way I set the carb up it is meant to be wide open. The racing beat carbs are great carbs people don't want to fork out the money for them but hell you can't beat them. They allow your motor to run smoothly with no hesitation at all. Webers, Mikuni and Dellorto carbs are also good carbs it's all in your preference I'm a Holley person.

Originally Posted by 13BTNOS' post='676491' date='Feb 23 2005, 12:44 PM

I use the 600cfm holley carbs for GM's with the prefix p/n 1850. You can't just slap a carb on a rotary and expect it to work properly. The carbs I use are vaccum secondary and I convert them to mechanical. I use a Racing Beat intake and open the plenum up. I drop it down 1/2in and blend it all in and use a 1/2in spacer for N/A motors or for Nitrous motors I use a plate system. The power valve is blocked and the secondary metering plate is modified. This setup is meant for track cars, drag racing, you can use it for street use but there is a slight hesitation when it transitions into the secondaries. But for drag racing it is great the way I set the carb up it is meant to be wide open. The racing beat carbs are great carbs people don't want to fork out the money for them but hell you can't beat them. They allow your motor to run smoothly with no hesitation at all. Webers, Mikuni and Dellorto carbs are also good carbs it's all in your preference I'm a Holley person.

Originally Posted by firstgen24' post='861452' date='Feb 27 2007, 05:46 PM

I have a Mikuni on my 79, it will really go when it is punched over 3000 rpm, but getting to 3000 is a trick. It will stutter or bog down when I floor it around 1000 2500 rpm. I have been trying to fix this, but can't seem how. If you have any suggestions, please let me know.