[mashori]

I had a 331 built by Total Performance in the San Diego area. We have it down to 8.7:1 compression ratio. It was initially going to get a roots blower but now we have decided to go with a procharger. Just wondering what kit I would need for a carb setup. Also, at what point will I need an intercooler. It's going int a 71 ford maverick. The car is gonna stay a daily driver but I race it regularly.

[majorownage]

Originally Posted by mashori

I had a 331 built by Total Performance in the San Diego area. We have it down to 8.7:1 compression ratio. It was initially going to get a roots blower but now we have decided to go with a procharger. Just wondering what kit I would need for a carb setup. Also, at what point will I need an intercooler. It's going int a 71 ford maverick. The car is gonna stay a daily driver but I race it regularly.

Since you already have the compression ratio so low, go with a roots or screw type supercharger. Low compression plus a centri charger makes a dog of an engine.

[bentwings]

A 331 with a small case 6-71 would be a great street motor. A pair of 650 DP blower carbs would be perfect. No intercooler necessary. Use block huggers and convert to 3 in pipes all the way back. You could make a drop out section for the races if you wanted.

[mashori]

I figure down the road I will be stepping up to a bigger stout motor, probably a 351 based dart. Going with a centrifugal off the bad will save me the expense of changing to a different supercharger down the road. The 6-71 would be a little bulky for my daily driver, perhaps a weiand 174 if I were going that route.

Are there any ways of getting the engine up a little in the lower rpm's to keep it from being sluggish? what would an 8.7:1 331 NA make HP wise in those lower rpms?

[bentwings]

I'm sure you will need a 3500 converter and 3.73 or 3.90 gears if you want any happiness on the street with a heavier car.

[mashori]

I have a T5 that I'm using. It had a C4 in there before but converted over. I have 3.25 gears which are pretty nice for street but with the T5 I could go higher I suppose. Cruising at 2300 around 70mph on the freeway.