Dp Or Vs?

[michaelmopar]

I have a 600 holley dp vs a 600 holley vac sec. which would be better for performance and economy. i was told the vac sec lets you have a little lag were as the dp will be instant acceleration. i have not used dp much if any. so what do yall think?

[pishta]

Vacuum for 80% of all setups is the better choice. If you have a high horse low weight 4sp, then maybe a DP. A 750 vacuum is almost a universal performance carb as you can go 100 more CFM with a VS carb with little ill low end effect.

[rumblefish360]

If you have a high horse low weight 4sp, then maybe a DP.

Na, I'd say "Ohhh Yeaaa!!!! Or WHOAOAOAAAAOOOOOOAAA!!!!!

Pishta nailed it.

[michaelmopar]

i have a 3000 lb car with a 5.8l and a 5 spd w/ about 300hp so you say no to the 600 dp and yes to the 600 vac sec???????????

[rumblefish360]

Now this is some info that is on a "Good to know" slot. The choice is yours. IMO If it's a daily driver looking for mileage, vacuum secondary the car.

[pishta]

Originally Posted by michaelmopar

i have a 3000 lb car with a 5.8l and a 5 spd w/ about 300hp so you say no to the 600 dp and yes to the 600 vac sec???????????

300 horse in a 3000 lb car with a 5 sp? That borders on a "high horse low weight 4 sp car" if there was one. Those numbers compare to a Nissan 350Z and are 700 lbs lighter than a 3000GT Twin turbo with 20 more horse. Not too bad

[michaelmopar]

sorry the curb weight with the 5.8l vs the 5l is about 150 lbs different. so weighing in at 3175 with the 5l and 3325 w/ 5.8l. and hp is closer to 350 and torque around 375. i have heard that i should use the dp it is supposed to get better milage. but i might try the 750 vac sec. car should be a 13 or 14 sec street car ????

[rumblefish360]

A vaccum secondary carb gets better mileage and can be tuned with a stiffer spring for more mileage.