joe,i have a tub full of 8mm pulley,s if you need to borrow for dyno day.

After checking chart again (been years) I would imagine I would be right in there close but just not certain with cam/head combo etc.

Mike if you send me a basket when I dyno I will make you a killer deal on my 049's. In fact if you wanna make a run up for a day and help out I will pass them onto you. Just might cost you a couple of pulleys.

interesting,i would be more than happy to come&check out the dyno session.i don,t want to sell any of the pulley,s but i can bring them and when the best combination is found i can tell you a good place to buy the ones you need. as far as the 049s i can find a use for them if the price is right.how far are you from chicago?

More power racing is about 40 minutes from grand haven. http://morepowerinc.com/ If it's to far I understand. I would bring heads with and give you deal worth driving up for (cheap) and have some fun at the same time. Builds are my 548's, tbs 871's, promaxx 317's valakoized, holley 850's. SR 900/1075 sc cam. Not doing any cam swaps at this point. Just tuning round one, AFR's, EGT's, BSFC, Timing, jetting. Not trying to squeeze every bit of HP but don't want any slouches either.

almost exact copy of the 548s i built for my cat but with dart 320 race series heads with no porting and had superchiller,s,right at 950 hp.when do you plan on running them,im up for a road trip.edit in,i had crane 651 cam,s.

I have 540s 8.25-1 comp. dart 345 heads and tbs 8-71s 850cfm quick fuels but no inter coolers. with 49-52 pulleys 6% underdriven I have 5.5 pounds of boost.

Dyno day went pretty well. First pull after break in made 920Hp with AFR's in the mid 13's. Kept removing boost and adding fuel and this is where we ended for the day. Idles great, no surge, purrs like a kitten down low, roars like a lion up top.[ATTACH=CONFIG]566617[/ATTACH]

looks good joe,might want to jet it up a little in the boat.

Awesome info man.

So, roughly two identical engines, except one having a 420 B&M , and other an 8-71 Littlefield. Both with 7lbs boost it appears?

Looking like the peak HP at 6000 was close, the B&M making a few more hp, but I noticed it looks like the B&M was making a fair amount peak more torque. Maybe do to the higher overdrive speed ..

easier to read this way