I know carb spacers are a trial and error deal. Are there some top contenders that I should be trying during an engine dyno session? Should be around 900 HP, NA, one Holley Dominator carb.
Picture looks like whats hanging on our dyno room wall,X2 on what G code posted.When we see a gain with a spacer we like to figure out if it was because of the increased plenum,improved manifold traffic,improved signal to carb etc,WE like shear plates and in most cases find more power with a properly working shear plate and manifold modifications.Have lots of dyno time with spacers ,One engine,a 415 SBC 10 cr 93 octane 500HP.did not want any spacer on the Vic jr or in the car .Some foot brake cars like small plenums and will dyno better with spacer-spacers but not leave the line ,The only time we saw 30 HPgain with a spacer was on a EZ EFI 2.0 on a 440 Mopar,Engine gained HP up high,think it had to do with injector angle.Bill C.I've tried a few over the years: four are missing from this picture
currently run this combo on the 565:
1" super sucker with a 1/2" open under it. It worked well on the dyno. I've never seen close to 30hp out of a spacer, but then again I haven't seen everything there is either. But when I dyno spacers I keep the same timing, jetting, lash, oil temp, water temp, and oil
go into it expecting to see 8 -15 hp with the right spacer. Good luck
What type of motor are you dynoing, and on who's dyno? Just curious.G-code,
I saw that array from another post you made. Pretty impressive!
Good info in here, guys, I appreciate it. Maybe the dyno facility will have some - I didn't even think to check with them. Some of them are pretty spendy. I currently have a wooden 4-hole, either an inch or inch and a half, can't recall.