AEM Engine ID and Spec Chart

[2drSE-i]

Found this in the book i recently bought, Titled "High Performance Honda Builder's Handbook"
It has a chart in the back for Honda engines from 1988-1996, with Valve diameters, valve stem diameters, head CC's, C/R's, Bore, Single Stroke, Con Rod Disp, Con Rod length(this is where it gets most interesting, now we have a complete list of rods we can use with custom pistons)

Ok, so for the A20A3, we have
Intake Valve Diameter:30
Exhaust Valve Diameter: 35
Intake Stem Diameter: 6.58-6.59
Exhaust stem Diameter: 6.94-6.95
Intake Installed Height: 48.59-49.34
Exhaust Installed Height: 47.66-48.41
Incidently, the B20A3 from the 88 Prelude S(not Si) has the same values on all valves
Head CC's: 47.2 (this is where the B20A3 starts to differ)
C/R: 9.3
Bore: 82.7
Single Stroke: 91
Total Engine Cylinder(not sure what that is..): 488.81
Con Rod Displacement: 1955.25
Con Rod Length: 137
MVMA Year Ratio (no clue on this one either, but ill put it here for posterity): 1.51


OK so other engines with rods that are the same length
D16A1 (1.6L Integra, 1988)
D16A6 (Civic 1990,1991)
B18A1 (Integra 1990,1991)
D15Z1 (Civic 1992-1995)
D16Z6 (Civic 1992-1995)
B17A1 (Integra GSR 1992,1993)
B18A1 (Integra (1992,1993)
B18B1 (Integra Non-VTEC 1993-1996)
D15Y5 (Civic 1996+)
D15Y7 (Civic 1996+)
D16Y8 (Civic 1996+)

So we have a few to choose from. Only difference is the wrist pin size, which is easily fixed with custom pistons

[Civic Accord Honda]

cool

[fogged]

nice post this will help some with my rebuild. Good work.

[2drSE-i]

i was looking at some other motor's valve diameters. if we wanted to run the B18A1's 31mm intake valves (rather than our 30) they have the same stem diameter, i just dont know about length...

[Ichiban]

I have this book as well. MVMA year ratio column refers to rod ratio. I believe that the header is a misprint. Total engine cylinder column refers to the displacement/cylinder.

[89T]

sticky please!

[labeledsk8r]

good stuff

[ZackieDarko]

so basicly any D-series rod will fit, nice

[1ajs]

scan that page and get it into the wiki

[2drSE-i]

dont have a scanner. i can take a pic of it though...it probly wont show up very well. thanks guyhatesmycar for shining some light on this haha. Ya D-series and many B-series Rods, just need to enlarge the wrist pins to 21mm from 20 on our stock pistons. Or do what im going to and get custom pistons made with 21mm pins :-D

[MessyHonda]

i always wonder if the b18a .80 over pistons(83mm) with the b18a rods would fit our motors with a .30 over bore. im not sure what would be the compression of that. because i want some 11:1 ratio since i already have to run premium on my car.

[ZackieDarko]

dont have a scanner. i can take a pic of it though...it probly wont show up very well. thanks guyhatesmycar for shining some light on this haha. Ya D-series and many B-series Rods, just need to enlarge the wrist pins to 21mm from 20 on our stock pistons. Or do what im going to and get custom pistons made with 21mm pins :-D

negative. we use a fixed pin all those rods (to my knowledge/all my research on the site) use a floating pin

[AccordEpicenter]

use a floating pin on 21mm wrist pins, thats what everybody does. Then you can use an off the shelf B18A/B rod. Do not use D series rods.

[2drSE-i]

oh ok silly me. D rods use 19mm pins, we use 20mm pins, and the b18a/b rods use 21mm pins, I had no idea about the floating/fixed pins though.

[coope]

second the sticky and where do u get the pin from do u just use the one from the integra and thats it or do u need some modification