imported_mrchaos

let me start here with a little backround... i have an '88 CRX Si that i want to swap a b16ax into, the x cause im not sure 1 or 2 yet, thats why im posting this thread.

now i know that the b16a1 makes 160hp and the b16a2 170hp. my real question is where does that extra 10hp come from? is it the higher CR (10.2:1 to 10.4:1)? a different ecu? or both? or something else?

if the engine itself is the same, minus the CR, ecu, etc it wont matter in my application anyway because i plan on new lower CR pistons, turbo, and a standalone ecu.

so if the 10hp is 'easy' to make up would you agree its not worth going through the cable to hydro conversion involved with the a2?

imported_loudsubz

Its not worth it.

First gen b16 are cheap.

Jugglez

1st gen
10.2:1 c.r.
PGM-FI label on the intake manifold with hump on the backside
white connectors
externally connected MAP sensor
Dual-single wire 02 sensor
Cable transmission
OEM oil cooler
Fuel rail has rounded edges
large "DOHC", small "VTEC" on valve cover

2nd gen
10.4:1 c.r.
No PGM-FI label on IM, no hump on the backside
grey connectors
integrated MAP sensor on Throttle Body
4-wire 02 sensor
Hydraulic transmission
Fuel rail has square edges
no OEM oil-cooler
small "DOHC", large "VTEC" on valve cover


The 2nd gens also had an improved cam profile, better oiling characterisitics, larger diameter fuel rail and injectors. I believe the fuel pump was also improved.

Aero

how much are those? estimate???

imported_mrchaos

ecu, tranny, engine...maybe axles

b16a1 - 1500
b16a2 - 3500

Aero

thats a big difference in price, how about in performance, is there a difference between those 2??

imported_mrchaos

read previous posts...a1 160hp...a2 170hp