yes, its all kinda adding up to looking like a very good build. the ideas are all in my head as to why but i don't know the terms to put them out there. lol Another plus is going to only a 3.8" bore that leaves me a whole lot of meat on the cyl walls too.

right now i am still researching parts, i'm going with twins this time around off stock manifolds. i made a thread to help decide what turbo's but nobody replied.

i was going to do a duramax swap but i wound up deploying to a place where i make no money so thats not going to work out.

 

prob a 70-76mm compressor would work good for ya

 

i have a tc78 now. i want to go twins and make big power with quick spool. if i did it right, t61's plot perfectly up the middle of the center line of the turbo map. but i'm not sure of what turbine. turbine info is so much harder to find.

 

i've plotted like 8 turbo's i'll see if i can get them posted up and you guys can see what you think.

 

did i do this right?

 

Are you looking to run like 28psi? lol

 

that was just to see what it would be to get to 50lbs of air flow. it sure doesn't seem like it would need that much boost. i daily drive 10psi and will have my street high boost set to 15psi.

 

my airflow calcs have to be off. i was going by forcedinductions web site. but i don't know where they set there airflows at as far as ve %

 

I think you're doing it right. The small bore iron blocks will take a beating, not to mention how much cheaper top end parts are.

 

I dont remember where I got my formula but I use
(max RPMxCI)/3456 = engine CFM

then get airflow(lb/min) with overall PSI
((14.7+desired psi) x CFM x 29)/(10.73x560) = LB/MIN

and then I always did whatever number I got i took 20% out assuming the engine by itself is only 80% VE.

For Pressure ratio I use
(14.7+desired PSI)/14.7 = PR


But Im not sure what the difference in plotting maps for single vs twins would be.

And here is how my map came out when I did it for my truck at 8, 10, 12, 14, and 16psi.