h22a turbo

[willyhua]

hi, now im h22a bot with 1.5mm headgasket, stock internal .0.4bar (rb25 turbo) stock sleeve& internal can boost up how many bar?

 

[ColdPlay]

Based on my experience(and some advise from the retired sifu Mr Turbo Sang), the maximum safe limit boosting on NA / stock factory internals not design for FI is 0.6 bar. To be on the safe side with stock internals, you may start with lower boosting, and gradually
increased if there is no sign of internals giving up...lol.
Leakage is kiddo stuff but dealing with pistons, crankshaft, bearing, gearbox fault is quite a headache.

Btw, H22a is quite torquey in stock form compare to other B or K series honda engine which is more of a smooth operator at redline.

 

[pijulrs]

U can safely up boost ur garret turbine with stock internal until 1bar pressure with good tuning.Ur ECU is important.BTW,changing to forged piston n forged conrod may helpfull to safely boost ur engine higher.H22a original conrod is the weakest point in h22a block.The stock sleeve can withstand until 20psi pressure with good tuning of hondata.