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Old 02-15-2001, 10:21 AM   #1
Tuning Factory Inc.
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Post 2.1 liter kit

Some of you may have already seen this but I thought it was cool.
<IMG SRC="http://www.toda-racing.co.jp/product/item/piston/13000EJ20T0.jpg" border=0>
2123cc kit from Toda Racing. Unfortunately it's $3200 and for some wierd reason they say 8.5:1 CR.
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Old 02-15-2001, 10:31 AM   #2
Jay_UK
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Stoker kits are quite common... but can offer good increases in torque.

The stock CR is 8:1... they have simply upped it slighty...

The pic looks like it uses a stock Subaru crank and rods... with aftermarket pistons.

I could be wrong..very difficult to tell just looking at a pic.

J.
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Old 02-15-2001, 11:23 AM   #3
DeliciouSpeed
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Toda is good for that, the honda B16a to b18 kit is noting more than the crank and rods from a B18 with custom pistons balanced and the like.

Ken
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Old 02-15-2001, 01:01 PM   #4
roninscar
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If it has shorter conrods, then the combustion chamber volume will increase, thus overall displacement will increase. Of course, that would lower the compression though.

scotto
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Old 02-16-2001, 12:13 AM   #5
8Complex

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Jay - If it raises the output volume, wouldn't it HAVE to have a new crank? I though pistons only change compression ratios.
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Old 02-16-2001, 12:29 AM   #6
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Hmm... Larger bore maybe?

db
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Old 02-16-2001, 12:44 AM   #7
8Complex

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Hmmmmm... why would they include a crank in the kit then?
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Old 02-16-2001, 08:52 AM   #8
Aspen
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8complex,

You can do it any of the three ways or combinations to get increased displacement.
crankshaft, connecting rods, pistons.

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Old 02-16-2001, 10:36 PM   #9
Aspen
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Yup, Yup, I stand corrected on just using the connecting rod issue.
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Old 02-17-2001, 12:10 AM   #10
CosmoTheCat
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Yeah, what he said... If the piston isn't as tall as stock it'll increase the volume of the comp chamber.

EDIT: Tall meaning distance between the connecting rod and the top of the piston.

[This message has been edited by horatio102 (edited February 16, 2001).]
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Old 02-17-2001, 12:15 AM   #11
Catfish
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Roninscar...

Not so.

Shorter Con_rods only lower the CR because the piston will not travel as far up the cylinder, thus reducing the 'squish' area. But, the overall distance the piston travels will be the SAME as before unless you change the stroke.

To increase the engine capacity, you must either do one, two or all of the following...
A: Increase the stroke of the crankshaft
B: Increase the diameter of the pistons
C: Get more a bigger engine with more cylinders.

There is no other way to increase static displacement.

Remember the formula for engine capacity is:
Engine Displacement = #Cylinders x pi/4 x Bore(2) x Stroke
Cylinder Volume = pi/4 x Bore(2) x Stroke

See, Conn_rods are nowhere in the equation.

This kit must increase the stroke, otherwise why would the crankshaft be part of the kit? Maybe it still uses stock rods, but has different pistons to accomodate the different piston pin offset required to keep them from banging into the head.

Dave

[edit] forgot something

[This message has been edited by Catfish (edited February 16, 2001).]
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Old 02-17-2001, 03:04 PM   #12
Section 8
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On the crank issue.....

It could be a OE crank that has had material added to the rod journals (??? the area where the rods attach to the crank) and reground effectivly making a longer stroke with a "standard" crankshaft.

Or it could be a completely new casting/forging.... I can't tell by a picture.

Greg
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