L33_944

Here's my plan:
The motor:
5.3L L33 LS
TSP 224r cam (I think the 228r would be over kill on the 5.3L)
Edelbrock performer RPM intake

The car:
2900-3000lbs
5 speed Manual tranny
3.89 FDR
mainly street driven although will see up to 10 lapping events/track days (NOT drag racing)

I've been reading VS are better for street driven, heavy, automatic cars, and MS are better for lightweight, manual trans, WOT performance/race cars.

I assume I'm in the lighter category, but will mainly be street driven.

What do I choose?
750VS
or
650DP?

Thanks for any input

speedtigger

iTrader: (16)

This decision is primarily about what kind of torque converter and rear gear you have. Since you have a manual transmission, I would say if you have a a 3.42 gear or higher numerical ratio, I would pick the 650DP.

L33_944

sorry, final drive is 3.89

Also what fuel pump is everyone running on a set-up like this? Like what psi/gph? (im gathering 7psi/110gph is very popular)

Pop N Wood

iTrader: (1)

Holley's web site has an interactive carb selection guide. The say a mechanical secondary carb is OK for manual transmission cars that are under 3100# and having a 3.73 or lower rear gear.

If you run a return style fuel system and 3/8 lines then a 90 gph pump or larger should be more than sufficient.

speedtigger

iTrader: (16)

I would say the 1st gear ratio of the manual trans is part of the equation to, but I don't want to complicate this too much.

ZONES89RS

iTrader: (25)

It can run great with both, but the DP would get my vote especially for the instant fuel demand you might want on the throttle stab.

L33_944

I have heard the VS is a more forgiving carb when it comes to tuning.

Would a DP'er be a bad choice for someone just getting into holley's/carb's on cars?

speedtigger

iTrader: (16)

I would not run a vacuu7m secondary on your gear ratio.
I don't think you will find it more difficult to tune.

L33_944

cool thanks for all the input guys