[Dominik]

dear forum,

due to reasons of unavailability of 427/428 FE engines in south-africa as well as beeing too expensive to import from the US I plan to turbocharge a 390.

who wants to share experience and know-how, if I plan to turbocharge for drag racing as well as maybe short round track racing (15 minutes = 8 laps).
for symmetrical reasons I like to use two turbos
max rpm could be a reasonable 5500 rpm, intercooling I could add later, as well as water injection. my feeling tells me to use a suck-through turbo, although you could convince me usind a blow-through.


are the "small" FE con rods (3/8" bolts) suitable forturbocharging as well as the cast crank?
from which boost value on do you recommend forged pistons?
what is the recommended compression ratio (in relation to boost)?
does calculating correct carb size work like calculating for naturally aspirated engines muliplied by boost ratio, which is almost linear to an increase of displacement?
how should I curve ignition?
I like to reuse the (good) low lift cam as well. do I need harder springs?
what do I tell the turbo-shop which units to sell me (they may know, but I like to compare)

any information is appreciated.

thank you,

dominik, cape town