Quote:
Originally Posted by APillow  I have to say though the Demon 625 with electric choke and vacuum secondaries is looking pretty strong. Again for a heavy DD I don't see a way around it. |
you will be very happy with this.
I've been through 3 carbs....my truck (81 c10) has a carbed 5.3 with a GM HOTCAM and GMPP intake
1. holley 650 d/pumper... truck ran great up top but WAY TOO rich at idle. Drivability average.
2. holley 750 vacuum sec.... not impressed... average drivability, average WOT performance
3. summit 600cfm vaccum sec. This is on my truck now... i love it. Drivability is EXCELLENT and WOT performance is just a hair less than the 650 dp.
FWIW, if i ever get the truck to the track... the 650dp will go back on....but for everyday cruising... 600 vac secondary all the way.
YRMV