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Old 06-19-2019, 02:51 AM   #1 (permalink)
BongoBennie
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Join Date: Oct 2011
Location: United States
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Two faced insight build underway. K series gearing? discuss

So If anyone here has seen my random and sometimes spastic posts I have reset a few things and Im starting from almost scratch on my build... Here is what I have so far...

2002 Honda Insight

Goals.... Ultimate Commuter (not a daily driver, but goals are goals)

Actual goal, to drive 100 miles to the drag strip and average 50+ MPG and without touching a thing run a 10 flat in the 1/4 mile, car will have A/C, P/S and a nice stereo, big brakes, nice paint, wheels, etc.

K20A2/A3 hybrid motor... 11.7:1cr
K20A2 block-stronger, oil squirters, higher OEM compression pistons
K20a3 head- smaller exhaust ports, smaller combustion chamber
ARP head studs
K24a4 intake manifold
Garrett GT2554R/HKS turbo manifold (will most likely change)

Rear end is out of the 2016 HRV and I just ordered hubs and will have it mounted soon

Now for the transmission. I have the trans which is Element AWD (with Accord outer case to fit Insight), gearing inside is stock Element and Im really at a loss on ideas that don't include trial and error (which I will ultimately do).

Element gear ratios.
1st: 3.533

2nd: 2.042

3rd: 1.355

4th: 1.028

5th: 0.825

FD: 4.765

Options add 6th .659 (about $650 in parts!)
4.4 or 4.0 FD
aftermarket LSD

3.533 to 0.659 is just about the biggest spread within the k series gears

This is not cheap and asking about gearing in the K20.org etc groups is tough when talking about anything but drag racing (hey, its AWD, I get it)

I can also buy a 2015 Civic Si to harvest for its 1-6 (or 3-6) and LSD (which can be machined to fit for $300) about half the cost of the above option

2015 Si
1st: 3.267
2nd: 2.040
3rd: 1.429
4th: 1.073
5th: 0.830
6th: 0.647
FD 4.765

So I thought I would ask you guys your opinions on these gears.

tire size is still up in the air, Ive been looking at everything from 205/50R15 ultra performance summer tires to 215/45R17 in these https://www.toyotires.com/tire/patte...es-versado-eco

So this aint about saving money or the environment, just a fun car to build with lofty goals which I may or may not achieve but I'll have a nice sound system. Thanks for any tips, comments, suggestions, humor, etc.

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2001 Insight 11.5:1 K20a3 turbo / 04 Element
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