can someone give me a quick run down of rod and stroke ratios for the honda engines. I was pretty sure that the B16 is pretty darn close to 1.75 (which if im right is perfect for hondas, and why so many people on this forum love the b16). I love the del sol, drive my friend's whenever i can. I'm in the process of saving money, and i dont know as far as si or s then b18b swap, and drag gen 3 kit. They have one built for del sol's with a b18b swap, which is sweet. Is the B16A3 worth working on, as far as turbo ability? Just want some opinions is all. Thanks guys.

Yeah, the B16A has a near-perfect rod-to-stroke ratio. 1.74 I believe (http://www.raceseek.com/honda_specs.htm). I also know of a couple people on Team Sol that have a turbo B16A Del Sol. Just have to do it right and not cut corners. If you like the idea of a turbo B18B, then jump on an S or Si model since they'll be easier to find, cost less, and the B18B swap isn't the most expensive in the world to boot.

with a b16a turbo, remember you have to rebuild the engine to lower compression, because VTEC and turbos don't get along too well. With the b18b, remember to reinforce your engine, cause the displacement of the engine as far as cubic inches is the same, but the b18 is more bored out, hence it's roughly 1.5 rod/stroke ratio. But the b16 is as close to perfect as you can get, and I personally prefer it as a platform. It's a great great engine.

The B16A and the B18B share the same 81mm bore the difference in displacment is from the longer 89mm stroke compared to the 77mm stroke on the B16A. That is how they got a better R/S. To obtain a good R/S ratio you need as long of a rod as possible, so to use a longer rod in the same block (basically) they had to shorten the stroke to prevent thew piston from going beyond the deck.

im not quite sure what is involved with lowering the compression? i remeber always thinking that the b16's werent the best for turbo, but if i put time and money into a car, i want it to last. A bad r/s ratio will basically oval-out the cyclinders over time wouldn't it. This seems like something that people seem to over look, but seems important to me. Let me know what you all think

people don't overlook that... you don't just smack a turbo onto a stock motor (usually....). The engine is rebuilt with aftermarket/stronger parts, and the whole thing is given an aftermarket reinforcement. This prevents ovalling out, but it is more or less going to happen anyways. Look at getting a B16b block... the DOHC VTEC's non-VTEC little brother, which has a lower compression.

I thought the B16B was the Civic Type-R motor, which I'm having a hard time believing is lower compression than the B16A, and certainly isn't non-VTEC. Were you referring to the B18B from the RS/LS/GS Integras?

b18c1 is a GTR and b18c5 is a type R if i am correct

correction, b18c5 is an integra type R, you are correct, the b16b was the civic type R motor its compression is 10.8:1 vs the b16a3's 10.4:1

well then if we are looking at compression, what is everyone's bias as far as b20b or b18b with a turbo. I know this has been discussed before, but like everything else on AF it must be repeated 500 times (like turbo or supercharger?) but as I see it, the more opinions the better. I'm simply trying to weigh all the important things to look at when preparing to boost an engine. (single wall design like the b20b, compression ratio, rod and stroke) all of these things effect how the engie will react to boost

I thought the B16B was the Civic Type-R motor, which I'm having a hard time believing is lower compression than the B16A, and certainly isn't non-VTEC. Were you referring to the B18B from the RS/LS/GS Integras?

Yep. She meant B18B1.

B16A2/3 - DOHC VTEC (SiR-II: Del Sol SiR, Civic SiR, Civic Si)
B16B - DOHC VTEC (Civic Type-R)
B18B1 - DOHC non-VTEC (Integra RS/LS/GS)
B18C1 - DOHC VTEC (Integra GS-R)
B18C5 - DOHC VTEC (Integra Type-R)

Technically, the block isn't VTEC though. The head is. :p

As far as opinions go, the B20B has thinner walls (over-bored B18) so I wouldn't use that for turbo if I was going in that direction. I would opt for a B18x or B16x with proper preparation.