Hybrid B20B

[b20b]

Is there a problem with using the B20B crank when doing the B16A head and B20B block combination, as i have just built one using Argo rods and Ross pistons And B20B crank

Is this wrong ??????

[Setanta]

I think Chuck (ALLMTR) used the B20B crank in his 12 second CRVTEC 3rd gen Civic. Try PMing him

[ALLMTR]

If I was building with Argos and Ross, I would go B18c crank but that's just me

[pornstar]

the b18c is a smoother crank from what ive been told by my close mechanic, its able to rev out nicely, and better for NA from what he said.

Since the b18c and the b20b share the same stroke length, its the better of the 2 to have.

[DynoDave]

the b18c is a smoother crank from what ive been told by my close mechanic, its able to rev out nicely, and better for NA from what he said.

Since the b18c and the b20b share the same stroke length, its the better of the 2 to have.

Pornstar they are not the same stroke B20B is 89mm stroke and B18C is 87mm stroke' so by using the B18C crank you change the rod ratio which allows you to use more RPM.The B18C Integra Type-R crank is an even better choice to use in this combo and if you need one PM Toda Australia as he does a very good deal on them.
Regards Dyno Dave

[b20b]

so what sort of RPM range does using the B20B crank limit you to before it becomes unreliable compare to the B18c crank?
By shortening the rod doesent that mean you lower the gudgen pin in the piston which i was told is a problem ......not sure if this is correct?

[DynoDave]

By using the B18C crank you are using 2mm LONGER conrods which gives you a better rod ratio ' you use the same pistons so the gudgen pin is not lowered.
Regards Dyno Dave

[DynoDave]

Since the b18c and the b20b share the same stroke length, its the better of the 2 to have.

The B18B LS engine shares the same stroke as the B20B.
Regards Dyno Dave

[pornstar]

oops, my bad! i stand corrected.

[ALLMTR]

If you have already built the motor it is a bit late to be asking for advice :?

If you are running argo rods you should have no prob turning it to 9000 as I was going 8500 with stock (weak) B20 rods

[tinkerbell]

If you have already built the motor it is a bit late to be asking for advice :?

LOL!

If you are running argo rods you should have no prob turning it to 9000 as I was going 8500 with stock (weak) B20 rods

harmonics above 8500 will be an issue if high compression (>11.5:1) is being used.

a block guard will help here...

teh crank and rods are less of an issue compared to the weak tops of the sleeves...

[SIKCVC]

I read sleeves were a real issue on the B20B, hence the reason a lot of the US guys getting resleeve before doing any major CR increases. Not that I really need to know :shock: