cage2592
Administrator
Jan 2020 I talked with Mark Jones, AKA VORTECPRO to build a 406ci to replace my aging 406 that wiped a lobe with a COMPCAM. This is the build.
VORTECPRO:
Build a mild 406 for a 70 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. Run out on the center ex seats, has to sink .010 too fix. Hand Porting resulted in 275 CFM @ .500 lift @ 28 inches 4.155 bore SF 600.
Balance sheet ? 1728 grams
All ARP ? Yes
4 bolt mains added ? No GM 2 bolt
Pistons ? Mahle
Crank ? Scat Remachined
Rods ? Scat. Remachined
VE 101.9
VORTECPRO:
Build a mild 406 for a 70 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. Run out on the center ex seats, has to sink .010 too fix. Hand Porting resulted in 275 CFM @ .500 lift @ 28 inches 4.155 bore SF 600.
Balance sheet ? 1728 grams
All ARP ? Yes
4 bolt mains added ? No GM 2 bolt
Pistons ? Mahle
Crank ? Scat Remachined
Rods ? Scat. Remachined
VE 101.9
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