Ultimate Honda B16 Engine Guide – Everything You Need To Know

author avatarJoe Terrell
08/18/202018th August, 2020
Filed under Engine Guides

It’s hard to ignore Honda’s B-series family legacy in the JDM world. In this guide, we’ll cover everything you need to know about Honda’s coveted B16 engine.

honda b16


That’s right – we’re back with another article to keep the Honda fanboys happy.

In all honesty, though, we’re also here to provide another impressive, high-revving Honda engine the appreciation that it deserves.

Sure, we may be die-hard drifters at heart, but we still have a massive amount of respect for engines that aren’t typically found in drift cars, especially when they tug at our JDM heartstrings.

Let’s face it, as much as we love tail-happy fun; the chances are that we’ve all either owned or had a heap of fun in an FWD pocket-rocket in our lifetime. If you haven’t, you’re missing out.

Check out this awesome video of a simple B16 enjoying some twisty touge roads to get you in the mood, as we take an in-depth look at Honda’s wild B16 engine.

Spoiler alert: It even gets a little sideways towards the end!


Introduction

In 1989, Honda launched the first generation B16 engine to the marketplace in the Integra XSi, and the CRX SiR, which later went on to birth a further six generations throughout its eleven-year lifespan.

The B16 was the first engine to integrate Honda’s soon-to-be-legendary VTEC system within an inline-4, lightweight aluminum block.

With the typically-exceptional build quality that we expect from Honda, combined with the ridiculous 9,000-rpm redline in stock form, it’s no wonder that the B16 became one of the most legendary JDM engines ever produced.

civic drag race quarter mile

It wasn’t until Honda later integrated the later B16A2 engine into the 1999 Civic Si that the B16’s popularity began soaring, as this was the first time that the B-series sold in the US other than in the Del Sol, which wasn’t, erm, quite as desirable.

One of the most impressive aspects of the B16 was its horsepower-to-liter ratio.

Despite the first generation having exactly 160hp (100hp-per-liter), Honda continued their research and development into the B16, enabling them to later squeeze out an insane 185hp from the highly-desirable B16B engines in stock form.

Imagine if some of the huge-displacement American V8 engines were capable of achieving that kind of horsepower-to-liter rato!

Oh, and that’s before we even get started talking about modifications, upgrades, and the true potential of what these tiny powerhouses are truly capable of achieving.

civic gas station hard parked

It was the VTEC technology, combined with their crazy redlines that enabled Honda to produce such an epic engine.

It was a brave feat for a stock engine, especially considering it makes for an immensely reliable and convenient daily driver.

We’ve already shown our appreciation to Honda’s K20 and K24 engines in our recent guides.

However, this time, it’s the B16’s opportunity to prove why it’s gone down as one of the most impressive engines of all time, which has earned the Civic its spot in our Best Tuner Cars, Best Project Cars AND Best JDM Cars of the Nineties lists.

civic

We’ll take a look at the history of this untamed beast, before unveiling how you’ll be able to unleash its true potential.

If you think that the figures we’ve mentioned so far are impressive, you haven’t seen anything yet.


Honda B16 Generations & Specs

Are you interested to know more about a specific generation of the B16 engine? In this section, we break down each engine and its details.

B16A (First Generation)

The B16A SiR 1st Gen was the first-ever B16 engine, which hit the market in 1989.

With a displacement of 1.6L (1,595cc), this early engine perfectly hit the 100-horsepower-per-liter ratio.

Featuring a compression ratio of 10.2:1 and VTEC engagement from 5,500rpm, a redline of 8,000rpm, and an 8,200rpm rev-limiter, this first-generation powerplant was a revolutionary gamechanger at the time.

After VTEC engagement at 5,500rpm, it would achieve peak horsepower at 7,600 with a respectable 160hp, peak torque came at 7,000rpm, with 111lb/ft.

B16A (Second Generation)

The B16A SiR 2nd Gen was the Japanese equivalent of the B16A.

For this generation, they installed new pistons, which changed the compression ratio to 10.4:1, and also used a less dynamic intake camshaft, with an increased throttle body size of 60mm.

Although VTEC still kicked in at 5,500rpm, with these upgrades, the 2nd Gen achieved peak power with 170hp at 7,800rpm, which an increased redline of 8,200rpm.

B16A1

Created for the European market, the B16A1 had a reduced compression ratio with 10.2:1, alongside peak horsepower of just 150 at 7,600rpm and 111lb/ft torque at 7,100rpm, with a rev limiter of 8,200rpm, and VTEC, which kicked in at 5,200rpm.

B16A2

With different camshafts, the B16A2 continued with the 10.2:1 compression ratio, thankfully returning to better power figures, with 160hp at 7,600rpm and 111lb/ft torque at 6,500rpm.

VTEC kicks in later at 5,600rpm and continues to the redline of 8,000rpm, before hitting the limiter at 8,200rpm.

B16A3

Honda created the B16A3 for the Honda Del Sol, with a return of the 10.4:1 compression ratio, once again providing peak power of 160hp at 7,600rpm, and 111lb/ft torque at 6,700rpm.

VTEC kicks in at 5,600rpm and continues to party to the redline at 8,200rpm, before hitting the limiter at 8,500rpm.

B16A5

Produced for automatic transmission Civic SiR’s, the B16A5 was capable of increased power, with 174hp at 7,800rpm, but torque remained with 111lb/ft at 6,300rpm.

The compression ratio remained the same at 10.4:1, and the redline was at 8,300rpm.

B16A6

Based on the B16A2, the B16A6 was produced specially for the Middle East and South African markets.

With a compression ratio of 10.2:1, this was capable of achieving 158hp at 7,800rpm and 118lb/ft torque at 6,400rpm, with VTEC kicking in from 5,500rpm.

B16B (Type R)

The B16B is the most desirable of all B16 engines and was a revised and improved equivalent of the earlier B16A SiR 2nd Gen.

For this, they opted for a de-stroked equivalent of the Integra Type-R B18 engine, which provided a new height of 212.4mm.

This additional space allowed for an upgraded crankshaft, pistons, and longer, lightweight connecting rods, which provided a rod-to-stroke (RS) ratio of 1.85:1.

Alongside these internal upgrades, they also adjusted the intake ports, increased the throttle body to 62mm, upgraded the fuel injectors, added an improved exhaust system, and also installed a lightweight flywheel.

That’s not all – the B16B also had upgraded camshafts, lightweight intake valves (which featured thinner stems), and reinforced valve springs.

With this significant revision, and a new compression ratio of 10.8:1, Honda pushed out their most impressive power figures to date, with 185hp (sometimes stated as 187hp), at 8,200rpm and 118lb/ft at 7,500rpm.

VTEC kicked in a little later at 6,100rpm on this engine, but it was worth waiting for before it continued to the redline at 8,400rpm, before hitting the limiter at 9,000rpm.


What Hondas Have The B16 Engine?

B16A (First Generation)

  • 1989-1993 – Honda Integra
  • 1989-1991 – Honda CRX (EF8)

B16A (Second Generation)

  • 1992–1993 – Honda Integra (DA6, DA8)
  • 1992–1994 – Honda Civic (EG6)
  • 1992–1993 – Honda Civic Ferio (EG9)
  • 1992–1995 – Honda CR-X del Sol (EG2)
  • 1996–1998 – Honda Civic (EK4)
  • 1996–2000 – Honda Civic Ferio (EK4)

B16A1

  • Honda CRX (EE8) (EDM)
  • Honda Civic (EE9) (EDM)

B16A2

  • 1992-2000 – Honda Civic (EG6/EG9 & EK4) (EDM)
  • 1992-1997 – Honda Civic del Sol (EG) (EDM)
  • 1996-1997 – Honda Civic del Sol (EG2) (USDM)
  • 1996-1998 – Honda Civic (EK4) (AUDM & NZDM)
  • 1999-2000 – Honda Civic (EM1) (AUDM)
  • 1999-2000 – Honda Civic (EM1) (USDM)
  • 1999-2000 – Honda Civic (EK4 sedan) (Philippines)
  • 1999-2000 – Honda Civic (EM1) (CDM)

B16A3

  • 1994-1995 – Honda Del Sol (USDM)

B16A5

  • 1996-2000 – Honda Civic (EK4) (JDM)

B16A6

  • 1996–2000 – Honda Civic (SO3, SO4) (Middle East & South Africa)

B16B (Type R)

  • 1997–2001 – Honda Civic Type R

Honda B16 Tuning & Upgrades

When it comes to tuning the B16 engine, the sky’s the limit, and you’ll be amazed by what these small engines are capable of providing that your pockets are deep enough!

The best way to approach tuning is to have the end goal in mind.

So, ask yourself: What do you intend to build?

Do you want a reliable, fast road car, a daily commute and weekend track toy, or a full-blown race car that you’ll most likely end up trailering to the events?

custom project build vw corrado

As you’ve probably guessed, there’s a huge selection of modifications available for the B16 engine, and Enjuku Racing will be able to provide many of the aftermarket parts to help your B16 reach its full potential.

There’s no question that Honda did a great job with achieving over 180hp out of these engines, but we can easily extract a few more horses with some simple bolt-on mods.

As always, we’d ensure that you’re starting with a healthy B16 before carrying out extensive mods, and we would ideally like to see around 170-190PSI across the board during a compression check.

There’s nothing more frustrating than pouring massive amounts of time and money into an engine, just to find out that you’ve been attempting to polish a turd.

Now that you know you’ve got a solid base – let’s begin looking at the upgrades on offer, from simple to extreme.

As you’ve probably guessed, the first convenient upgrades to consider would be the following:

  • 4-1 exhaust manifold – One of the common swaps is from the B18C, but it’s often easier to buy a new aftermarket equivalent
  • Uprated exhaust system – Opt for a larger bore to get the gases flowing, and also to make your B16 sound a little more impressive.
  • Cold air intake – Another vital upgrade, but make sure you buy a decent CAI, as some of the cheap options on the market are likely to suck in hot air, which certainly isn’t what you want.
  • Remap – If you’re planning to stick with these upgrades, then good tune here can help make your B16 more efficient, and use the new upgrades to the best of its potential.

These are the simplest mods, but if you’re looking to take things further, you can take a look at some additional upgrades, such as:

  • Cams
  • Ported/polished head
  • Uprated fuel pump
  • High-flow injectors
  • Sports pipes

From there, things get a little more serious, and costly:

  • Forced induction (turbocharging/supercharging/twin charging)
  • Pistons
  • Heads
  • Valves
  • Race cams
  • Lightened flywheel
  • Throttle body
  • Bearings
  • Head studs
  • Valves/guides/springs/retainers
  • Spark plugs
  • Uprated oil pump
  • Oil cooler
  • ECU upgrades

Before undertaking forced induction, figures of around 200whp aren’t uncommon, which makes for a fantastic naturally-aspirated fast-road setup.

When you begin to approach the 230-250hp power bracket, you’re likely to start encountering issues, unless you’re prepared to spend big money on internals.

Before you begin chasing significant power figures, 230-250hp B16 is more than enough power for a reliable, daily fast-road setup.

Beyond that, you’re likely to encounter both traction and reliability issues.

If that doesn’t phase you, then some owners have found that the actual limit to a street-able setup is around 400-500WHP. After that, you’re unlikely to be capable of much other than spinning up the tires.

With this kind of power, we would expect a full-weight Civic to be capable of running an approximate ten-second quarter-mile time.

honda civic wide angle

When you start to look at crazy power figures (and budgets), a full-blown sleeved block, forged bottom-end, B16 engine with a big turbo kit can eventually be capable of over 800WHP.

With that, however, you can expect some severe turbo lag and horrific reliability, and you can forget driving it to and from events, also.

If enormous power is your end goal, then you may be better off considering a higher displacement base, such as a B20, or a K20.

Unfortunately, ‘there’s no replacement for displacement’ also counts for the B-series, and a more substantial block would undoubtedly make life a little easier.

However, the humble B16 is still capable of huge figures if you’re willing to put in the extra work to make it possible.

If you’re considering the forced induction route, then make sure you check out our Turbocharger vs Supercharger guide.


Honda B16 Common Issues & Maintenance

If you’re already fairly clued up when it comes to Honda’s B16 engine, then it’ll most likely come as no surprise that there are very few common issues, especially on well-maintained stock engines.

Of course, strapping a gigantic turbo onto your B16 and bashing it off the limiter every drive isn’t going to do you any favors, but we wish you luck finding an engine that’ll happily take that beating.

With that said, some B16 engines are now over 30 years old, and you can expect that someone, at some point, has probably had a little too much ‘VTEC, yo’.

For this reason, we always recommend carrying out a compression test if you’re looking to purchase a B16. A compression of around 170-190PSI across the board on a warm engine is ideal.

honda crx

We’ve seen many B16’s venture over the 300,000-mile mark with the correct maintenance, which we’re sure you’ll agree is pretty impressive!

Some of the older B16 engines can be known for burning a little more oil than you might expect. If you’re pushing the car hard, this comes as no surprise. Simply keep a frequent eye on it, and top up whenever necessary.

B16’s take kindly frequent oil and filter changes, so we’d recommend doing this as often as possible, it’s likely to reward you for doing so in the long run.

Idle issues are one of the more common faults, but this can be something as simple as a vacuum leak, or a faulty TPS or IAC valve.

The only other real issue we’ve heard of is leaking around the camshaft seals.

Assuming your B16 ticks all the right boxes, you’re likely to be left with one of the most reliable engines ever created.


Honda B16 vs B18

Ah, yes, the age-old question that has been the starting point of many internet wars over the years.

Putting e-beef aside lets put these two engines head-to-head and form an unbiased opinion on which is likely to be best suited for your needs.

Honda’s B16 and the B18 engines are quite different, and, as you’ve (hopefully) guessed, this mostly comes down to the difference in displacement, with the B16 being 1.6L and the B18 1.8L.

honda integra

Where the most popular engine in the B16 family, the B16B, is capable of a high-revving 185hp, there’s no real argument that it somewhat lacks in the torque department, with just 117lb/ft, in contrast to the 197hp, and 131lb/ft torque from the B18C.

If you opt for the earlier B16, you’ll be even lower, with just 160hp, and 111ft/lbs torque on offer in stock form.

So, in that regard, on paper, the B18C reigns supreme over the B16 in stock form.

But, once you take into account the popularity of the B18, you’ll realize that if you don’t already own one, then you’re likely to pay the premium if you think it’s the ideal choice, and B18C’s are likely come at a price.

For the additional cost that you may need to put into a B18, an upgraded B16 may end up being the more sensible option.

Parts are often cheap for the B16, and there are a lot of tuning options available on the market. If you’re keen for a 1.8L displacement further down the line, then you can bore out your B16 to achieve this.

Another consideration is the car that you’re planning to fit your new powerplant. Where a B16 may be ideal for a lightweight chassis such as an EG, it may become a little sluggish when it’s weighed down by an EK, which is where torque works in your favor.

If you’re planning a colossal power build, then the B18 or B20 may save you the initial hassle. Still, for the costs of a sensible project, you’re likely to be able to build or buy a turbocharged B16, which would likely defeat a stock B18, while remaining in a similar price bracket.

mini engine swap

Alternatively, you could opt for a B18B, which is likely to be far cheaper than the B18C, and add the essential bolt-on mods alongside uprated cams and valvetrain to achieve around 150whp and 140lb/ft torque.

On the other hand, a B20 could also be a consideration, with the higher-compression engines making around 140-150hp in stock form. With bolt-on mods, that could realistically reach somewhere in the region of 160-165hp.

Realistically, the B-series engines all have their positives. The chances are that if you already own a decent B-series engine, then you’re probably better off just upgrading what you already have.

If you’re looking to purchase, then it’s all about weighing up the pros-and-cons to work out which route is the most effective to achieve your power expectations.


Conclusion

There’s no question that the B16 is an insanely impressive engine, especially for its size.

Not only is it capable of crazy horsepower-to-displacement figures, but it’s also amicable when it comes to tuning, especially if you’re not hunting down big power-figures.

Turbo-swaps are, of course, always a temptation, and where some owners will argue that the B18 or B20 engines may be better suited to forced induction, B16’s are often sourced cheaper and can work out more cost-effective once you’ve added up the work.

If you’re concerned that you may regret not opting for a more substantial displacement further down the line, then fear not, as you can always bore out your B16 to 1.8L if necessary.

white civic street race bmw m5

When it comes to reliability, there are very few engines out there that can match the B-series family.

Although they’re going to be fairly old now, they’re aging like a fine wine and assuming as it hasn’t bounced off the redline every day without any oil changes, then we have no doubt it’ll serve you well.

If you’re concerned about the potential condition of an engine, then a compression test is likely to inform you if there are any significant concerns.

We hope that we’ve provided the answers to all your Honda B16 questions with this guide, but if not, then drop us a line, we’d love to hear your thoughts and feedback.

Are you interested in going down the Honda route, but can’t resist the temptation for some tail-happy fun? Make sure you check out our Honda S2000 Tuning Guides.

Thank you for reading our Honda B16 guide.

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Photography credits

We thank the following entities for the use of their photography in this article:

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author avatar Written by Joe Terrell Drifted.com founder, motoring journalist and all-round car enthusiast. Read more about Joe and the Drifted team on our about us page.

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