From what I have found, the B16 and B17 blocks have the same deck height and are visually the same. Here are the questions:
Will a B16 crankshaft go into a B17 block?
Would a California Smog Ref. know the difference between a B16 head and a B17 head?
Are there any differences between the intake manifolds?
The plan is to build a B16 inside a B17 block and getting a BAR sticker.
b16a and b17a blocks are the same. the only difference is the b17a has different crank, rods, pistons —thus giving it more displacement and less compression.
so, the b16a crank and internals will work perfectly in the b17a block.
the smog ref will not know the difference. both heads are pr3 heads so they are basically identical. i’m not sure if there are actually any markings on them that make them different or not. But it won’t matter. once he looks at the block stamp he’ll just assume they are the same.
the intake manifolds are different. I’m pretty sure that you’ll have to get the b17a one. I think the vacuum hose routing is different on the two.
The above details are the least of your problems.
Since you have a 90-91 you’re in for a fun time with this swap!!! In order for you to get the BAR sticker you’re going to have to run obd1. there is a small chance they won’t check, in which case you could stay non obd and be fine. But if they check, you’re screwed. I’m also swapping a b17a into my 91. I’ve done all the research on how to do a legal swap for my car… and an obd1 b17a swap is pretty much the only thing out there. Converting to obd1 is going to SUCK!!! Plus, you have to make sure you keep the service connector of the obd1 harness. This is what allows them to check the ecu. I’m pretty sure if you just do some splicing and what not and leave the original non obd service connector they won’t be able to check the ecu… and thus would fail you.
I don’t know all the details yet, because i haven’t started my swap. But i’m pretty sure the wiring is going to be a big pain in the ass!
Thanks 91IntegGS I read your post about B16 and B17 heads being of the same casting in the “Integra Help” section.
If you use a B16 head you’ll need to make sure that it was made during the correct year to pass as a B17 head. The date, time and year of production is stamped on every head on the front in little circles.
If you’re trying to claim a B17A1 and your head was made in 89, the ref will probably catch that and you’ll fail.
-Steve
Dammit Steve
This head will be for your block man!!!
I’m just trying to help you out man. 
Originally posted by DAY U IZ
[B]If you use a B16 head you’ll need to make sure that it was made during the correct year to pass as a B17 head. The date, time and year of production is stamped on every head on the front in little circles.
If you’re trying to claim a B17A1 and your head was made in 89, the ref will probably catch that and you’ll fail.
-Steve [/B]
this is true. but i really doubt they will go into that much detail. If you’re casual about it, and just go in there like you bought a complete b17a and swapped it in, you’ll be fine. As long as everything else is legit, i doubt they’ll even bother checking the head. The only instance where i’d think they might check the head is if you use the wrong intake manifold, wrong obd, or if something else is sorta fishy. But if everything is correct (exactly stock as how the b17a comes) i really doubt they’d check the head, because i dont think they’d have any reason to believe it wouldn’t be a b17a head.
I guess the hardest part will be the ODB situation. How has your conversion been? Maybe we can compare notes.
Originally posted by SE-37K
I guess the hardest part will be the ODB situation. How has your conversion been? Maybe we can compare notes.
the obd swap will by far be the hardest part. I haven’t started my swap yet. I’m still saving money so i can buy all the parts i need. I plan on beginning the buildup in mid to late june. And then actually doing the swap into the car sometime midsummer. So, its still a ways off. I wish i had started already and could give you some info on the wiring issues… but i can’t, and actually i’m still pretty much in the dark about what all needs to be done. But luckily i have all the wiring from a 92 gsr, so hopefully that will make it a lot easier.
oh, and don’t forget, you need a ys1 tranny. they might not check the tranny code… but technically you have to have the tranny that was made for that engine. Unfortunately the ys1 tranny i have has a busted casing (by the front mount). So, i’m going to have to put the ys1 gearing into my 91 ls tranny case. I’m not sure what will happen if they check the tranny code. maybe i can just take the sticker off and they’ll ignore it, and just assume its a ys1??
I’d be careful about that Colin. If you shaved the B17A1 off the block, would they just assume its a B17?
The only YS1 I’ve found cost $800 http://www.sohfast.com
Originally posted by DAY U IZ
I’d be careful about that Colin. If you shaved the B17A1 off the block, would they just assume its a B17?
well, the tranny is a bit different from the engine. I’m not even sure they will check the tranny to make sure its the right one.
I have the ys1 sticker off the original casing… so if possible i might be able to pull it off and put it on my other casing (not sure how to affix it though).
I could use the original ys1 casing, but i’d have to have it fixed, and i’d rather not pay any extra $$ when i have a perfectly good s1 casing i could use.
got any suggestions on what to do?
Well, if you have the sticker, the buy some super glue and make that S1 a YS1. Hehehehehe
-Steve