500whp SR20 build?

[R3b]

I spent about 1.6k for my machine work from a really good shop and did the assembly myself, would be another couple hundred for them to do the long block. So figure out all the parts you and another 1.5-2k for full assembly motor with line hone, boreing, block hot tank/deck, crank polished, bearings cleared for block/crank, head decked, new valve guides, cleaning, dis/reassembly, and correct cam clearance.

I did ka and did everything to my bottom end and left a stock head and was at around 3k just for the longblock. I do everything on my car so I save on labor which will cost double. Im sure youll be at 3-4k depending on parts to run and where you find deals and you well over need another 3-4k in standalone mods like tranny, good topmount mani, holset turbo at least, exhaust, intercooler set, bov and wastegate, fab work, maybe intake, top feed, then more if you plan to use e85 switching lines, bigger injectors, a proper tune on a standalone, brake upgrade, driveshaft, bigger wheels/tires to grip, then gauges like boost, temp, oil pressure, and wideband.

Thats bare min and you still should do other maintenance like clean/paint the bay, money to paint the engine/covers, new sensors, maybe harness, tuck whatever you can, upgrade cooling system, new suspension, a better seat to hold you in place, maybe a cage or harness.

Its easy getting the motor to handle power but all the supporting stuff adds up.

[hanzbrady]

Originally Posted by R3b

I spent about 1.6k for my machine work from a really good shop and did the assembly myself, would be another couple hundred for them to do the long block. So figure out all the parts you and another 1.5-2k for full assembly motor with line hone, boreing, block hot tank/deck, crank polished, bearings cleared for block/crank, head decked, new valve guides, cleaning, dis/reassembly, and correct cam clearance.

The difference here is that you had a KA built, which is cast iron and thicker than an SR20. When sleeving an SR every measurement in the block gets distorted, so instead of a simple hone (cheap process), you now have to re-size everything (much more expensive and labor intensive). A sleeved SR also has to be CNC milled to accept sleeves which again is a high cost process. Once you sleeve a block it also requires a unique decking process know as step-decking since you cant run a linear surfacer over the cast sleeves and aluminum block (this another CNC process.) Now comes the question of why sleeve, well you don't have to, if you stay stock bore size and run no timing. The SR is thin and gets hot, it warps and starts destroying itself when you force it to make power, that's why cast iron sleeves are used. That's why building a 500hp SR costs much more than a cast iron block like the KA's or 4G63's.