Shift Points & Max. Timing?

[93gtmustang]

I have a new Ford Racing GT 40 B-303 cam 345hp crate motor in my 93 GT Mustang.
It has about 550 miles on it.
I have the timing at 15 advanced, fuel pressure 39psi.
The best I've run so far is 13.4 @ 102 mph in the 1/4 mile.
I use to run 15 advanced timing on my old 5.0 motor which worked well.
Will I gain anything by upping the timing some more on this motor, or is this as high as I should go?
I have my shift light set at 5500 rpms. It sounds and feels like a good setting. Does that sound like a good shift point?
Thanks

 

[mattsclean90]

I honestly wouldn't try anything over 15 degrees for fearing the risk of detonation. I used to always run my N/A engines with 14 degrees of advance or lock the timing out to a total of 32-36 degrees and I always ran with 93 octane. With that engine you should be able to run in the 12's pretty easily. 5,500 is a good shift point for a b-303 setup. I had a friend with that cam and his would die after about 5,700. Did you run with slicks? How was your 60ft?

 

[blackened88lx]

No one will be able to tell you the correct shift point for your combination. You're just gonna have to experiment with it at the track and see what it likes best.

 

[93gtmustang]

I'm using Hoosier Quick Time Pro's. They're a Dot class slick basically.
60' aren't bad. Should be better. 1.89. The car actually hooks so hard that it bogs sometimes. Even launching at 4000 to 5000 rpms. I just keep upping the pressure.
It's been better with 22 psi , I may even try 25 and see what happens.
Compared to my old 5.0 , this new motor keeps pulls more at higher rpms.
My old motor 5300 was a good time to shift.
I use to run drag radials too ,so the Hoosiers are new to me.