383 refresh combo opinions..

roccodart440 said

:D






Your logic about the spacer would seem right in theory. I've played with that intake in a big block mopar on the dyno. I tried several spacers. Best one was to use an HVH super sucker 1" spacer. It makes 10-15hp and similar tq.

I run 3" car seems to like it and it's quieter and deeper sounding. If you are going to spend money on an exhaust just go 3". If you already have the exhaust a 2.5" would be fine for your combo.

Click to expand...

I seen a video about 3 years ago about testing intakes on a SBC383 and the Edelbrock air gap + a 1" open spacer was within 5hp of a Victor Jr (single plane) and no spacer - but the RPM made more power below 3,500rpm plus better street cruising manners

And I believe that to be true as I did that on my head/cam/intake Ford 306 that made 304hp/294tq/ at the wheels through a VS750 (over carb'd) - it was faster with a 650DP (that's around 350hp/350tq at the crank)

Next pay check I am ordering the exhaust, fuel tank kit, and am debating on the Summit 3" kit w/o mufflers - the only reason why I want to run the 2.5" is cause I don't know if the 3" tailpipes will fit between the fuel tank and leaf springs..