in my 85 t/a i got a 350 with about 275hp, about 20000km on motor(12000miles) i recenty bought a sniper nitrous system and plan on useing a 100hp shot, it came with a "T" fiting to tap into the fuel system, i'm useing a edelbrock street fuel pump, my question is with the edelbrock pump be able to give enough fuel to the carb and nirous system? also i am currently running 10deg or base timeing, ow much should i back it off?

 

At 100 HP I wouldn't change the timing. I'm running a 200 shot on a stock bottom end with no problems. I use premium gas mixed with 100 race gas 50/50 at the track and have my total timing down about 4'.

 

and you think the edelbrock mech. ful pump with me sufficiant? some ppl say you should always run a seperate pump for the nitrous system