what class can i run

Paul Wong · 12-21-2012, 02:09 PM

Quote:

Originally Posted by Sam Capizzi Jr

I highly doubt that you can to run high 12s with a "legal" 318 2barrel. The 185 horsepower rating is about 10 hp to high. That's at legal P weight for a 1973 dart swinger at 3130 pounds

It can be done, but it is not easy. I got a legal 273 2 barrel 4 speed valiant in the 12's in Q/S that went through several NHRA teardowns and was looked at at Indy in 2005.

A good fuel system helps a lot with a carburetor with small volume like a mopar 2 barrel.

Sam Capizzi Jr · 12-21-2012, 02:20 PM

Quote:

Originally Posted by Paul Wong

It can be done, but it is not easy. I got a legal 273 2 barrel 4 speed valiant in the 12's in Q/S that went through several NHRA teardowns and was looked at at Indy in 2005.

A good fuel system helps a lot with a carburetor with small volume like a mopar 2 barrel.

Paul when you say good fuel system are you talking volume or pressure? And do you run the carter 2bbl

Paul Wong · 12-21-2012, 02:41 PM

Sal, its volume. Our little carburetors dont have much of a bowl and at 6000 plus they need everything they can get without the carb starving for fuel. Adding pressure fools with things as far as I can tell.

Sam Capizzi Jr · 12-21-2012, 03:15 PM

That's very interesting....makes sense to me. My car runs 95 mph in 90 degrees or 35 degrees. I've tried diff fuel pressures from 6-12, no change. Stock needle and seat, stock jet size. When I go up in jet size the car drops right off ET and Mph

Duster 318 · 12-21-2012, 04:04 PM

when i tried to change my jet size up it made the car run slower e.t. and mph was down. it is a carter also and the fuel pressure can make a big difference with mine.

12-21-2012, 02:41 PM	#3
Paul Wong Member Join Date: Jan 2003 Location: Las Vegas Posts: 384 Likes: 101 Liked 419 Times in 85 Posts	Re: what class can i run Sal, its volume. Our little carburetors dont have much of a bowl and at 6000 plus they need everything they can get without the carb starving for fuel. Adding pressure fools with things as far as I can tell.

12-21-2012, 03:15 PM	#4
Sam Capizzi Jr Member Join Date: Jul 2009 Location: Rochester NY Posts: 131 Likes: 25 Liked 43 Times in 9 Posts	Re: what class can i run That's very interesting....makes sense to me. My car runs 95 mph in 90 degrees or 35 degrees. I've tried diff fuel pressures from 6-12, no change. Stock needle and seat, stock jet size. When I go up in jet size the car drops right off ET and Mph __________________ Sam Capizzi Jr. 1301 SS/AS 93 Dodge Daytona R/SA 73 Dodge Dart

12-21-2012, 04:04 PM	#5
Duster 318 Junior Member Join Date: Dec 2012 Posts: 42 Likes: 0 Liked 0 Times in 0 Posts	Re: what class can i run when i tried to change my jet size up it made the car run slower e.t. and mph was down. it is a carter also and the fuel pressure can make a big difference with mine.