Re: 400 Small Block Build And Dyno Test
A forum member had me build a mild 406 for his 71 Chevelle, I thought I would post some pictures. I had a very nice thick 817 production block, bore and stroke 4.155 X 3.750, with a 7/16 6 inch rod and a Mahle piston, we ended up with 10.3 compression. The cam is hyd roller, 234/238 @ .050 .560/.530 lift on a 110. We used a AFR 195 head with modifications and a performer RPM air gap intake with a 1 inch open spacer. Carb is a AED 750 CFM. We plan on testing different distributers, locked and with a timing curve. Gas will be 91 octane from 7-11. Should be a interesting build. I should mention the valve job from AFR was a disaster.
Are you finding that those 1" spacers are pretty consistently giving you a little extra power, or is it just something the customer wanted?
'72, 385 sbc, Voodoo roller, 219/227; .515/,530 lift; AFR 180cc Eliminators, RPM Air-Gap, 770 Avenger, TH350 trans, 12 bolt 3.42's, Eaton Posi, TCI 2000 stall, Pypes 2 1/2" X-pipe system w/Race Pro's
Vehicle weight: 3390 lbs