[o2seriousi]

here is my problem i'm boosting my k20a3 and the rods for a a3 cost about $710.00 but i got a good deal on a set of wisco pistons and eagle rods but they are for a k20a2 i kno that the 2 bottom end are a little different but i'm picking up a type-s crank would i be able to use t for the piston&rod setup

 

[jtuner77]

crank is the same.

 

[- guest -]

A2 crank is fully counterweighted

A3 crank is partially counterweighted

-Ron

 

[Dc5itracer]

Is the k20a crank the same as the k20a2 crank and is knife edging the crank worth it edo or does it make the crank weaker?What would you say is the safest compression to run on 94 octane?I would like just to change the pistons and rods and get everything balanced.Also if i go for the IPS cams will i see some gains from doing a port and polish.I plan on getting the TWM itbs to go with the cams and k-pro and a bump in compression cant wait :up:

 

[- guest -]

K20A and K20A2 cranks share the same part number.

Knife edging is okay for balancing purposes - don't get too carried away though if it's still a street car. Just remove enough material to help balance the rotating assembly as best as you can.

We've run 12:1 on 91 octane, so I think you may get away with 12.5:1 on 94.
We haven't tested our cams in a ported head, but the K-series doesn't need much work since it flows 300cfm from the factory. You can go wrong pretty quickly if the porter doesn't have any experience with the K-series. The feedback I've received from the good cylinder head shops say that minor work in strategic places are all that's necessary to improve the head for most performance applications. Then again, the best cylinder head prep will be custom for the cams you choose to run and the complete engine combination.

-Ron

 

[Dc5itracer]

http://www.kingmotorsports.com/product.asp?detail=2099&vehicle=RSX

Would you reccomend this edo?Also is okay to run that high of a compression on your cams what wlse would you recommend to make the motor live i want a well balanced street strip motor but still run low 11 maybe 10's would it be possible

P.S This is going in a 91 civic hatch by the way

 

[- guest -]

That's a standard price for what you're getting, but King campaigns their World Challenge car so they probably have more experience than most with K-series.

If they're local to you, then go for it.

-Ron

 

[o2seriousi]

now who is correct edo or jtuned i'm trying to get info for better knowledge of the blocks i could care less about the type-r motor......

 

[- guest -]

Very easy to verify:

1. Call up acura parts counter and ask for part numbers for both K20A2 and K20A3 crank.

2. Physically look at both side by side. The K20A2 crank will have 8 counterweights, whereas the K20A3 crank will only have 4


-Ron

 

[BigDawg]

Ron, when tearing down the A3, Razid found the rod journals to be smaller on the A3 crank than the A2 crank.

 

[- guest -]

Yes, I have heard A3 journals were smaller - but I haven't measured them myself - only visually saw the partially counterweighted characteristic of the crank.

-Ron

 

[o2seriousi]

so should i buy the crank, in order to put the piston&rods in...i'm trying to come out hard for the spring boosted k20a3 in a ej1 (92-95 civic coupe) w/ k-pro

 

[JOHN]

so should i buy the crank, in order to put the piston&rods in...i'm trying to come out hard for the spring boosted k20a3 in a ej1 (92-95 civic coupe) w/ k-pro

what does the rsx crank run

 

[o2seriousi]

if ur asking the price i'm paying $40 in the dealer i think its about $400-up

 

[TheDoctor]

Edo is correct, if you are going to run the A2 rods and pistons then run the crank also, and what you look at is not how much the crank will set you back, look at what a New shortblock will set you back if your A3 crank doesnt hold together with your new setup? Thats like Macaroni and cheese, without the cheeeeese Its just not the same, well good luck with your build :up: ....

Caio,
D