Difference between g1 b16's?????

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
1

A couple of weeks ago my friend bought a 1st gen b16 head that he is planning on using for an lsvtec buildup. Yesterday he bought another b16 longblock because he was able to pick it up for just $450. Anyways, when looking at the heads, one says pr3-1 and one says pr3-3. Do any of you guys know what the difference is?

Sean

2

1st gen b16’s had 160hp and later versions had 170hp because of more agressive cams. I don’t know which later versions though because the 2000 civic SI is only rated at 160hp so…

BTW, there’s a hybrid forum that deals with engines that don’t come in a g2 and this thread will probably be going there pretty soon.

3

whiteyg2RS: you are only sort of correct on that info.

first off, all USDM b16’s (b16a2 and b16a3) have 160hp and a compression ratio of 10.2:1

89-91 jdm b16a’s have 160hp and have 10.2:1 compression

the 92+ jdm b16a’s have almost 170hp and run 10.4:1 compression. Their cams are slightly better than the 89-91 cams, but nothing too drastic.

4

Both of my friend’s heads are 1st gen. That’s why we can’t figure out why one is pr3-1 but the other is pre3-3.

5

OOO I think I know. One was from an automatic car and the other was from a standard. I believe the auto b16’s have the very least aggressive vtec cams made. Am I right??

6

Originally posted by whiteyg2RS
OOO I think I know. One was from an automatic car and the other was from a standard. I believe the auto b16’s have the very least aggressive vtec cams made. Am I right??

That could be. Maybe one was from a crx and the other from an integra??? I really have no idea, does anybody know for sure?

7

Originally posted by whiteyg2RS

BTW, there’s a hybrid forum that deals with engines that don’t come in a g2 and this thread will probably be going there pretty soon.

:wink:

8

Re: Difference between g1 b16’s???

Originally posted by 93gsr
[B]A couple of weeks ago my friend bought a 1st gen b16 head that he is planning on using for an lsvtec buildup. Yesterday he bought another b16 longblock because he was able to pick it up for just $450. Anyways, when looking at the heads, one says pr3-1 and one says pr3-3. Do any of you guys know what the difference is?

Sean [/B]

PR3-1,3-2,3-3,3-4 no difference in casting from what I’ve seen.

9

Yep, auto b16a’s are detuned with less agressive cams. the 92+ b16A’s have a 2mm larger throttle bodym, better cams and 10.4:1 compression.