Largest bottom pulley

On a Brad Hemi with a RCD Fuel pump extension, what is the largest 14mm pulley you can fit on the bottom? It appears that we have just over 4 in clearance from the center of the crank to the bottom of the pump extension. So according to my math, that makes the largest 14mm pulley to be either a 45 tooth or 46.
Just wanted to verify with someone running this combo before I buy pulleys.

 

pulley size

We rum a 54 tooth btm and a 24 tooth top 13.9 htd (2.25 over) and have used 2 belts in3 years. the pump extension has to be cut to allow the lower pulley clearance. I put a seal on the pump drive shaft to stop any oil leakage. STAN

 

Wow. 54. Do you know the radius size of that pulley? I calculate it to be 4.75in. Not sure I can cut my pump extension that much.

Thanks

 

raised cam helps

 

We saw a guy doing the same as this. I assume you needed a seal because your shaft is exposed. The guy we saw was running REAL close to the pump shaft he normaly ran in some high country. When we saw him he was trying to get it to run down in the flat lands and was having all sorts of problems was getting way to much good air for his set up but didn't want to hear about it. Made 2 popandbang passes put it on the trailer. Was on a bb mopar and must have been close to 10 inch dia.

 

I have a 54 tooth 14MM HTD in stock for $150.00 if it will work for you.

626 815-8815 9 to 5 PST.

 

with a seal in pump ext i tfx 14mm have went with 51 tooth on bottom.i did hve 53 try to call you left message

 

I have a RCD pump ext that has been clearanced like you are looking for. I can send a photo if needed. $100.00 and ride. I will be gone to the PRI show. I will try to check this post.

Todd Matin
405-833-2065