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PostPosted: Thu Nov 08, 2007 4:00 pm 
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Hello,
The whole point of this is:
I am trying to roughly calcualte without having the parts the compression ratio of a stock G13B 1.3 Swift GTi bottom end with a G16B Baleno 1.6 16 Valve head.

Has anyone done it?

I downloaded this to help... http://www.virtualengine2000.com/index.htm

Is a little bit hard without all the measurements.

In theory it should be a lower compression ratio as the G16B has bigger combustion chambers.

Cheers,
Damian

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PostPosted: Thu Nov 08, 2007 4:06 pm 
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The larger combustion chamber in the G16 is mostly beacuse of a difference in piston head. The G16 pistons have a dish.

I should make some calculations, but I am quite sure that a G16 head on a G13 block will result in higher compression ratio due to G13B pistons being flat. The absence of the dish will lead to a higher compression ratio than the one seen with G16 pistons.

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PostPosted: Thu Nov 08, 2007 4:11 pm 
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Ok, I did my numbers, and CR will be ~10.5

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PostPosted: Thu Nov 08, 2007 4:22 pm 
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Thanks Caaarlo,

What about a G13B bottom end with:
standard rods, and 75mm bore standard Baleno pistons with the Baleno 16V head?

Whats your best guess / estimation?

Thanks 8)

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95-96 = 95 Suzuki Baleno GS2
96-01 = 96 Suzuki Baleno GTX
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PostPosted: Thu Nov 08, 2007 5:20 pm 
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around 8

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PostPosted: Thu Nov 08, 2007 5:32 pm 
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Caaarlo wrote:
Ok, I did my numbers, and CR will be ~10.5


I calculated it a while ago, and think I got 11.6-1.
I'll have to look at the numbers again.

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PostPosted: Thu Nov 08, 2007 8:06 pm 
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I have re-checked the calculations:

G16B Total Chamber volume = 46.76cc

The dish on the 71C50/51 pistons has around 12,56cc

So, the new chamber volume with flat top G13B pistons will be 46,76 - 12,56 = 34.2cc

New compression ratio with a 34.2cc chamber volume = (34.2 + 324.5)/34.2 = 10.48

These calculations are based on my previous dish calculations http://www.teamswift.net/viewtopic.php?t=24954&start=12

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PostPosted: Fri Nov 09, 2007 12:14 am 
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I'll have to dig up that paperwork again.
Maybe it was 10.6-1 :huh:
Or maybe I'm :screwball:

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PostPosted: Mon Nov 19, 2007 10:26 am 
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suprf1y wrote:
I'll have to dig up that paperwork again.
Maybe it was 10.6-1 :huh:
Or maybe I'm :screwball:


Yup.
I checked. It is 10.6-1

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PostPosted: Mon Nov 19, 2007 11:23 am 
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Now you owe me a beer.

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PostPosted: Thu Oct 22, 2009 8:40 pm 
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Caaarlo,
Are you able to calculate what my current Baleno G16B engines CR would be would be if I were to put a standard Swift GTi twin cam head on it? Please bear in mind I had custom pistons made for the Baleno which result in a CR of ~9.2:1 (instead of standard 9.5:1) with standard thickness headgasket and standard Baleno G16B head.

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94-95 = 94 Suzuki Swift GTi
95-96 = 95 Suzuki Baleno GS2
96-01 = 96 Suzuki Baleno GTX
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PostPosted: Sun Oct 25, 2009 9:49 am 
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suprf1y wrote:
Caaarlo wrote:
Ok, I did my numbers, and CR will be ~10.5


I calculated it a while ago, and think I got 11.6-1.
I'll have to look at the numbers again.

I came up with ~ 11.0 when I did calculations, without counting the head gasket. I guess 10.6 is closer to reality. One of my friends wanted to do this for a while now, but after seeing such little gains in CR he decided to go turbo instead.

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