Tuning help

I need some help on tuning BBC had a std helix 871 30% over, bird with 110 pump hat nozzles only 58s 155-165 pill. Going to a 1471 hi-helix retro setback with port nozzles added. 8-10 % over to start. I have no clue on where to start with jets hat or port or pill any advise on starting point ?

 

pump flowed? GPM? engine cu.in.? using ports now? do you know what your pump pressure was at your max RPM? What was your max RPM?

 

Pump not flowed should be around 13,do not know pressure,7000 rpm going to use ports now. 555 cid

 

Your best bet is to get the pump flowed and get a tune up from a reliable source. My suggestion is Spud Miller @ FIE (fuel injection enterprises)
Check out his web site......he has a tune up calculator if you want to play. But it will only be a guess ...because you will be guessing on the pump flow.

 

I started my blown alcohol days off much like you but after years of my guessing what to run as far as a tune up, and countless wasted passes because A: it was so rich it was sluggish or B: it was too lean and it burnt up pistons, rings, popped the panels, etc that I finally was able to get a handle on things but damn, the dollars and time wasted was too much. It would have been worth it to me to have my stuff flowed and get a baseline tune up suggestion from any reputable injection service. At the time, I thought it was a waste of money. NOW, I realize it was the cheaper and less problematic way to go about it. Live and learn.

 

Thanks everybody I guess should send my pump to Spud . I have tried using his calculator before could never get it to work for me.

 

Spud is a great guy but he has a lot on his plate nowadays as he does a lot of other things besides fuel systems.
Also, you might want to call Spike Gorr. He is here in Lake Havasu and might give you a little more personalized service and he is one of the best.

 

If you're happy with your current tune up air density online has a pro calc that you pay a subscription for, if you put in your current fuel settings it works out the air fuel ratio from their you can make your changes and work out what jets you'll need to keep the afr the same.

 

I also recommend Spike. He got my stuff running good and not eating up parts.

 

I am surprised your current setup is not on the lean side with a 555 BBC. That is 80 cid more than I had (in 1979) with the same pump, hat, and only a 6-71. Is this a iron BBC?

 

Iron block alum. brodies

 

It is nostalgia style FC ,no rules just run 4.50 1/8, 690 1/4. 555/BBC 4.560 bore, 4.25 stroke Brodie BB2+ flow 370s 0n int .775 lift roller Car weighs 2300, glide w.180low, 4.30 in rear 5000 conv. The manifold will come with the port nozzles marked, had been run on one with std 1471 30 over.34.5 17/16 Goodyear new top Al.tire 3122. liner wheels