The K20a3 Discussion thread.

[cRiPpLe_rOoStEr]

Originally Posted by Stacygifford

If I'm not mistaken in the 2200 to 3400 rpm range I believe the K24 has a lower BSFC But I could-be mistaken... I would have to find the graphs again ,At very least they dirt cheap and more readily available engines

Nobody really needs to go too far beyond that RPM range on a relaxed cruising. Unless they're in an underpowered penalty-box

[BongoBennie]

Originally Posted by cRiPpLe_rOoStEr

Anyway, I still don't see the presence of oil squirters as a problem. I'd still feel more comfortable having this feature on the engine.

You're right but the a3 does not have them and the a3 pump being less aggressive would be more efficient without them. Many who run forged pistons delete them anyways for more pressure at higher RPMs with an a2 pump, but yeah, there are none..

[BongoBennie]

Originally Posted by Stacygifford

Ktuner is MUCH cheaper and just as versatile. I am using the K24A4 from the accord in my 5speed 1St Gen Insight build (the same economy 12-16 valve activation)

I find it interesting but tried to contact local dealer and they are just too busy, Hondata is standard and they do make this injector driver which I would love to play with. https://www.hondata.com/index.php?_r...njector-driver

[BongoBennie]

Also I am totally interested in the K24a4 as actual displacement is not important. I would also be into a turbo albeit a small one. Would definitely be playing with a lean burn tune as 95% of the time I'll be on the highway. It really doesn't pertain to this thread directly, my swap will be in a 2001 Insight (my second) with a CRV gearbox and tires in the 26-30" range. The car will be hooked up to a teardrop trailer most of its life.

[California98Civic]

Originally Posted by Stacygifford

... Yeah whenever it gets moving along I will update it's old a** thread ....The goal is 50 mpg and 350-400WHP... gt35 turbo... Not to hijack your thread lol sorry ...

K24A4 in 1St Gen Insight would be a great title for a new thread. More people will notice it (at EM and elsewhere. Sounds wicked cool. Can't wait to see. [thread jack over!]

[BongoBennie]

Thread jack away! Im for whatever gets the conversation going, can I or a mod change the name of this one?

[Stacygifford]

Originally Posted by BongoBennie

Also I am totally interested in the K24a4 as actual displacement is not important. I would also be into a turbo albeit a small one. Would definitely be playing with a lean burn tune as 95% of the time I'll be on the highway. It really doesn't pertain to this thread directly, my swap will be in a 2001 Insight (my second) with a CRV gearbox and tires in the 26-30" range. The car will be hooked up to a teardrop trailer most of its life.

Haha, my insight is an 01 as well!!! That being said, With how little aero drag the insight produces, we should be able to have the engines run quite lean under VERY little load at just about any reasonable speed. In the insight the K20 would probably do much better for MPG If not for just reduced pumping losses. on the otherhand, The CRV world benefit from the added torque for sure though.

AS A SIDE NOTE
If you use the Inovate swap mount kit you HAVE TO use the k20 trans regardless of the swap kit/engine that you use.. The K24 swap kit does NOT use the K24 trans as one would assume, nor does it specify that the K24 trans will not work... Its a good way to get boned out of $500..... and they refuse to fix the problem....

With that out of the way, a word of caution..... the Insight with a turbo K series is just asking for disaster. At 320hp to the wheels (very easily attainable for a turbo k series) puts you pretty close to the hp/lb ratio of the Lamborghini Huracán LP 580-2.... with MUCH less aero drag, downforce, suspension, traction, or breaks, ect... You see the problems that could arise.

Not saying that it shouldn't/cant be done, Just plan ahead.

I am running KYB AGX struts with Ground control coil-overs and Knuckles from an 05 Civic with larger brakes. Hopefully i will be able to make a MASSIVE rear diffuser and front splitter "because racecar"

[cRiPpLe_rOoStEr]

Originally Posted by Stacygifford

In the insight the K20 would probably do much better for MPG If not for just reduced pumping losses. on the otherhand, The CRV world benefit from the added torque for sure though.

Displacement is not everything when it comes to mileage, and actually it wouldn't surprise me if one could get better fuel-efficiency with a K24 instead of a K20 even in a featherweight like the early Insight. Though I'm not so sure on how the aftermarket support for Honda K-series engines deals with efficiency-oriented projects, being able to reach a similar power and a higher torque at lower RPM ranges with a K24 even resorting to a lower compression ratio sounds quite reasonable, especially matching to a higher gearing and leaner burn.

[Stacygifford]

Originally Posted by cRiPpLe_rOoStEr

Though I'm not so sure on how the aftermarket support for Honda K-series engines deals with efficiency-oriented projects, being able to reach a similar power and a higher torque at lower RPM ranges with a K24 even resorting to a lower compression ratio sounds quite reasonable, especially matching to a higher gearing and leaner burn.

Gearing is the biggest problem with the k series aftermarket support,
Also none of the factory trans are really, eco minded with MAYBE an exception for the accord trans having a 0.66 overdrive. however the accords gearing is mainly to help haul around a heavy car.


The tallest final drive(widely available) is a staggering 4.389.... Which is what i am using. The 4.105 is avalble from other markets .Honda counter-shaft and ring gear part numbers are 41233-RAP-000 and 23221-RAP-000 btw.
at like ~$600 ......

OR get some real eco gearing from Custom Final Drive Gears
for $1200 but they have a 3.4!!!! can you say +60mpg!!!

[cRiPpLe_rOoStEr]

Sometimes a wider gear spread combined to a higher differential ratio can do wonders mileage-wise.