as the title states the question I have is how much power can a pair of twin 1.32A/R S475 turbos make on a well built 10:1 comp 489cuin BBC? Here’s the specs on the engine. It’s a GM 4 bolt 454 block with ARP studs, Scat forged crank and rods, Icon 2618 forged pistons, Custom Isky MEch roller cam 260/[email protected]” dur, .677”/.677” lift 112deg Lsa spec’d from isky for boost, ProMaxx 320cc heads with manly valves, pac springs, comp magnum roller rockers, ported victor intake converted to efi, 3815 intake elbow, 92mm ls throttlebody and ls2 coil packs controlled by mega squirt MS3 ecu air to air inter cooled running c16 when under boost.

 

I think the 75mm will move 100lbs/min each, so 1800+.

 

shit load.....................

 

If your asking, more than your ready for. JK

 

Oh believe me I’m ready for it....lol. I’m chomping at the bit right now because my 489 was just built and shipped and will be delivered Wednesday...

 

Capable of enough to put a hurtin' on a stock block after awhile.

 

Enough to make you poop your pants!

 

all of the horspowers

 

I would agree 1800HP and TQ pretty reliably

 

depends on turbine wheels under that 1.32 housing??
i have 83.. 1.0's turbine wheel and housings on my 411. id call it a light switch to be in boost. and yea 1800rwhp is about right.
standard or race coverz on the compressor side?

 

Well here’s some updates on my 489. I finally got it almost built but it’s going to take a little more time to gather up the twin turbo components to finish out the turbo dmsetup but for now it’s just going to have to be ran in N/A config.. I still have to wait another month or so before my powdercoat guys supposed to have my valve covers, timing cover, alternator, and pulleys done in a very nice hot candy blue powdercoat

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What you using for a cam signal?