Hugger67RSSS

iTrader: (2)

I'm thinking about switching out the single plane for the performer intake. Hoping it gains torque like most say. LS2 PRC stage 2.5 5.3 heads. Custom cam from Martin at tick and a quick fuel 750 Q series. I already have a 50 cc pump in the carb also.

How many other changes would I possibly need to make with the carb? I know the dual plane likes a bigger carb so I'm wondering how much tuning and if I will have enough carb for the swap?

Is it worth it in a car with a T56 magnum and used for autocross and some occasional road course use?

Thanks for any help/advice

speedtigger

iTrader: (16)

The 750 will work great on the Performer RPM. My car likes leaner jetting for the Performer. When I switched from Performer RPM to the Victor Junior I had to jet up 4 jet sizes all around.

Hugger67RSSS

iTrader: (2)

Thanks! I was hoping you would respond. I've read all your threads on tuning and know you have swapped them before. Did you have to adjust timing at all also?

speedtigger

iTrader: (16)

I don't remember.

Jake33

Do any of you leave the cut wiper cowl open or do you fill it in. ? I was debating if it's worth filling it in I dont have wipers or heat any air can come into inside of car?

Doug G

Still running my stock vented cowl, no heat or AC, still have wipers (been caught in rain maybe 4 times in 20 years) I will also say if you still have/use your kick panel vents, you may want to keep it.
Air flow through the cowl vent also goes through the rockers to blow out any moisture that runs down, but "may" not be needed if you close it off ? I believe