flyjum

Im thinking of turbo our sbc. Its a 406 Forged pistons camel hump heads 2.02 1.60 valves has lopy cam I dont know specs. Planning on 12 psi on 103 unleaded octane. Any one have a clue on the hp it will make. It made 575 Rwhp on 6psi with a B&M blower. Also what size carb should i be running? It has a 750 double pumper but I think its to big. It runs rich very rich right now.

GOaT Cheese

The last thing you want is a "lopey" cam with a trubo. You do not need/want valve overlap on a turbo application. A good friend of mine ran a turboed 406 in a '86 944 Porche, it was very streetable, and actually got decent fuel economy. That car didn't weigh much, around 3000 lbs. with him in it, but it would run 155-157 mph in the 1/4, it was basically a 10.0 car but on a good day it would crack 9.90's!

flyjum

Yea i know lopey is bad for boost but its very lopey. Kinda bad for boost I know. Is there any way to know my volumetric efficiency. What is average VE for a SBC

GOaT Cheese

There is no such thing as an average VE. There are thousands of variables that affect every engine differently. VE on a 350 could be between 75% and 130%, depending on how its built, condition, state of tune etc. etc..

slow trap

iTrader: (22)

the carb is not to big,you just need to rejet it. as for the 406 itself,you are playing with fire at your curent hp level if the mains aren't splayed and even then quite a few crack between the cylinders with high hp/tq like a turbo or nitrous will give you. why not just change pulleys on the b&m if it isn't maxed out or is it sold ? good luck whatever path you decide.