Finally bought a little 1992 civic hatchback. Has a b20b high compression motor swapped in it with a GSR trans. Runs great, needs a little work. Whoever did the swap did some crappy wiring with butt connectors and tape. Easy fix.

A few questions as this is the first Honda ive owned. I did a compression test and from cylinder number 4 - 1 the compression read 145, 143, 145, 170.

So they are within 10 percent of each other, but 170 is quite a jump. Worn rings more then likely? How much power is lost when compression numbers are that low? I believe spec is 220 psi

I cant for the life of me seem to find how to adjust base ignition timing?

Also just for fun and "quickness reference" I raced my buddies stock 98 mustang gt automatic from about 10mph. He pulled on me but not real bad. Seems to me like I should be faster then him? But maybe its the low compression numbers robbing me of power?

Any help is greatly appreciated!

 

Well if I recall correctly, The B20 should be around 180 on all cylinders.

Hence they havent built this engine in 15 years, It could use a rebuild.

Those numbers are low, and even the "high compression - which is really low compression" isnt going to beat a mustang.

The head is probably the P75 which is the worst flowing head of the Bseries.

So, if you want performance out of it, save some money, tear it down, get it checked, and rebuild it to where you want it. Get rid of that head!

 

It has a pr8 cylinder head on it, which from what I read is one of the best heads to have? I'm probably going to end up buying a used motor and doing a small build on it. 200 hp would be about the goal NA. Any build suggestions?

Man with the mustang rated at 225 hp but weighing a whopping 3300lbs I would think a car weighing 2100lbs with ~150 hp would stand a small chance against it

 

Nope. None should be lower than 153 PSI, if this^ were true.

 

Maybe I'm doing the calculation wrong. Can you explain those numbers?

 

10% of 170 PSI is 17 PSI.

170 - 17 = 153 PSI

The other cylinders are more than 10% lower compression than than that of cylinder # 1.