Hi all , know ive done this topic before but i want to make a few adjustment and just want some opinions, hard to get any solid advice from experience where i am.
Car is street saturday night car/ roll racing currently (30mph roll then punch the throttle)
there is no quarter mile track here currently but maybe within the year so would be second priority.
3400lb car
5.3 Iron block gen3 bottom
re honed, new bearings , openened rings.
arp head studs, arp rod bolts.
9.5comp is an approx
BTR stage 2 cam 226/231
ls1lifters, trnuinion upgrade , btr springs.
victor jr /elbow
s475 billet wheel (pulsar copy) 1.1ar 83mm turbine
w2a IC , e85

glide 1.8
3.54 rear , 255/60/15 ET MT


Last dyno tune 420rwkw/563rwhp Dyno dynamics 15degrees 17#boost 11.4afr

mashing the throttle from 3500rpm 1st in a roll ,
6psi at 4500rpm 0.76seconds
11psi 5000rpm 1.0seconds
16psi 5500rpm 1.18seconds

shift at 7100 drops to 5750.
makes around 1.4:1 backpressure all the way through

basically looking to pick things up a bit ,
firstly i notice the boost to rpm spool doesnt seem the best , but in time seems pretty quick and feels quick in the car. Im thinking this is cam/converter related ??
#1 what benefits are there to a larger cam like this one against say a reverse split cam motion in the lower range with much less overlap say like a 220/216 117+5 type deal ?? im guessing you would get much quicker spool up in something smaller and could just shift earlier ??
#2 id like to run more boost aswell , hoping to get 900+ flywheel horsepower 25# im guessing with this turbo . is that possible with this turbo setup ??
#3 obviously getting to the limits of the gen3 gear , will rods and pistons make the combo safe at 25# or is everything still on the limits and now i would have more cash invested in the motor ?


My idea was to get new 9.5" PTC converter with a bit more stall to match the current cam, new forged rods/pistons and then run 25# ish with this setup ??

hard to get any iron blocks in australia , gen 4 5.3 is worth 3000usd here , so its not quite disposable like it would be there?

 

id keep the cam you have . and steer clear of to tight of a convertor if you want the gen 3 rods to live. you can make good power with the gen 3 stuff but in the lower rpm you need to keep the torque down to keep from bending rods. i say lean it out to around 12.0 afr and it will make more power.

 

Seems like a large rpm drop on the shift. Be careful "lugging" the engine down hard on the shift. That's hard on rods. More power may help the converter not couple so hard on the shift.