Chris,
Newbie question here, dun flame me arr heheh :-
Let's say if Mr. T wants to plonk in a 2 liter all standard internals, no mods to pistons, crank in short a virgin B20 along with standard B16A head and internals, is it safe for the engine to run with no engine management ? Is it sufficient just to log data via Innovate and then re chip the ECU ?
Hai ya, over 4000 post not newbie lio. hehe..
From my understanding only (you need to double check as i may not be 100% right,
B20B P3F piston Compression 9+:1
B20Z PHK piston Compression 10.2+:1
For a street setup with mild cams like OEM B16A cams, the car should run ok but don't expect to make power close to 200whp. I suspect maybe 160-170whp but will have high torque.
One of the reason is the low compression pistons on them.
You got to be very careful with cam selection on stock B20B block. This is because the pistons are not made for vtec and does not have sufficient valve relief pockets on them. So when you use higher cams even like CTR or more aggressive, you may end up having your valve hit the stock B20 pistons and say bye bye to your engine.
That is why alot of people change to 85mm H/F series pistons that give the valve relief and higher compression to make more power. Other alternative in USA are ITR design cast piston in 84, 84.5 and 85mm size.
I suggest you have at least a proper A/F meter to monitor A/F or in dyno just to make sure your car is not too lean. Then when budget permits, do a proper road/dyno tune.
I were told stock B20B rods are only good and safe up to 8000rpm. Anything consistenly higher than that will see a spun bearing.
Hope this will help you, but you better double check with your tuner/builder cause i'm no builder nor tuner. Just info and knowledge i gather to share with you guys.
