TWE compression calculator.xls

8/12/2019 TWE compression calculator.xls

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Enter youro w nnumbers->

* Head MillDepth(inches) 0.000

SOHC EJ25Volumereduction(cc)

0.00

DOHC EJ25Volumereduction(cc)

0.00

Deck MillDepth (in) 0.000

DOHC EJ20T WRXVolumereduction(cc) 0.00

*

*Stage I heads and Blocks aregenerally milled .002"~.004"

** Stage II/III heads are generallymilled a maximum of .012"Decks are milled for correct quenchclearance.



EJ25 SOHC Combustion

Chamber area = 60 .8 cm^ 2

EJ25 DOHC Combustion

Chamber area= 56.25 cm^ 2

EJ205 Combustion Chanber

area= 59.95 cm ^ 2



SubaruWRX EJ20-Oct. 1998 and older

Kit Part #Bore

MM / Inch

Over

SizesStroke Rod Lgth. Comp Ht.

Head

cc's

Dome

Dish

Gasket

Thkness

Deck

ClearanceBlock Ht.

Comp.

RatioPin D

K576M925 92.5/3.641 0.020 2.952 5.137 1.312 -17.8 .012+ 7.913 .9055

K576M93 93.0/3.661 0.040 75 130.5 33.32 -17.8 .30+ 201 23

WRX -My00-post Oct. 1998

Kit Part #Bore

MM / InchOverSizes

Stroke Rod Lgth. Comp Ht.Headcc's

DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K575M925 92.5/3.641 0.020 2.952 5.137 1.286 48 -13.5 .054 .014- 7.913 8.0 .9055

K575M93 93.0/3.661 0.040 75 130.5 32.66 -13.5 1.37 .35- 201 23

WRX -EJ20-Stroker-Pre Oct. 1998-sleeved blocks w/out access holes

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K579M925 92.5/3.641 0.020 3.110 5.177 1.181 -17.8 0 7.913 .9055K579M93 93.0/3.661 0.040 79 131.5 30 -17.8 201 23

Imprezza RS, Forrester and Legacy EJ25 - SOHC

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K600M995 99.5/3.917 STD. 3.110 5.181 1.161 50 -18 .054 .016- 7.913 .9055

K600M10000 100/3.937 .020 79 131.6 29.5 50 -18 1.37 .4- 201 23mm

Imprezza RS, Forrester and Legacy EJ25 - DOHC

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K599M995 99.5/3.917 STD. 3.110 5.167 1.191 46.6 -23 .054 0 7.913 .9055

K599M10000 100/3.937 0.020 79 131.25 30.25 46.6 -23 1.37 0 201 23

WRX STI, 2004+ EJ257

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K598M995 99.5/3.917 STD. 3.110 5.137 1.209 50 -19 .054 .011 7.913 .9055

K598M10000 100/3.937 0.020 79 130.5 30.7 50 -19 1.37 .28- 201 23

Legacy Turbo 1991-1994 EJ22

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K601M975 97.5/3.838 0.020 2.953 5.137 1.312 46.6 -20 .054 .012+ 7.913 .9055

K601M98 98/3.858 0.040 75 130.5 33.25 46.6 -20 1.37 .32 201 23

Hybrid -EJ22 w/ EJ25 DOHC CRANK AND RODS

Kit Part #Bore

MM / InchOverSizes


DomeDish

GasketThkness

DeckClearance

Block Ht.Comp.Ratio

Pin D

K602M975 97.5/3.838 0.020 3.110 5.167 1.191 46.6 -22 .054 0 7.913 .9055

K602M98 98/3.858 0.040 79 131.25 30.25 46.6 -22 1.37 0 201 238.5

8.5

8.5

8.5

8.5



Ring # GramFoot

Notes

9250xx 350 1

9300XX 356

Ring # GramFoot

Notes

9250xx 358 1

9300xx 366

Ring # GramFoot

Notes

9250xx 339 1,6

9300xx 1,6

Ring # GramFoot

Notes

9950XS 1

10000XS 1

Ring # GramFoot

Notes9950XS 358 1

10000XS 366 1

Ring # GramFoot

Notes

9950XS 358 1

10000XS 366 1

Ring # GramFoot

Notes

9750XX 358 1

9800XX 366 1

Ring # GramFoot

Notes

9750XS 358 1

9800XS 366 1



131.60 mm79.00 mm39.507500 45000

crankrotationTheta

(deg. fromTDC)

crankrotationTheta

(radiansfromTDC) X1 (mm) Y1 (mm)

rodangularity

Alpha(rad. fromhorizontal)

rodangularityGamma

(deg. fromvertical) Y2 (mm)

pistondisplacem

entfrom TDC

(mm)

pistonvelocity

(m/s)0 0.0000 0.00 39.50 1.5708 0.00 131.60 0.00 0.00

10 0.1745 6.86 38.90 1.5187 2.99 131.42 0.78 6.9220 0.3491 13.51 37.12 1.4680 5.89 130.90 3.08 13.5130 0.5236 19.75 34.21 1.4202 8.63 130.11 6.78 19.4340 0.6981 25.39 30.26 1.3766 11.12 129.13 11.71 24.4250 0.8727 30.26 25.39 1.3388 13.29 128.07 17.64 28.26

60 1.0472 34.21 19.75 1.3078 15.07 127.08 24.27 30.8270 1.2217 37.12 13.51 1.2849 16.38 126.26 31.33 32.0680 1.3963 38.90 6.86 1.2707 17.19 125.72 38.52 32.0390 1.5708 39.50 0.00 1.2659 17.47 125.53 45.57 30.87

100 1.7453 38.90 -6.86 1.2707 17.19 125.72 52.24 28.77110 1.9199 37.12 -13.51 1.2849 16.38 126.26 58.35 25.95120 2.0944 34.21 -19.75 1.3078 15.07 127.08 63.77 22.64130 2.2689 30.26 -25.39 1.3388 13.29 128.07 68.42 19.03140 2.4435 25.39 -30.26 1.3766 11.12 129.13 72.23 15.26150 2.6180 19.75 -34.21 1.4202 8.63 130.11 75.20 11.43160 2.7925 13.51 -37.12 1.4680 5.89 130.90 77.31 7.61170 2.9671 6.86 -38.90 1.5187 2.99 131.42 78.58 3.80180 3.1416 0.00 -39.50 1.5708 0.00 131.60 79.00 0.00190 3.3161 -6.86 -38.90 1.6229 -2.99 131.42 78.58 -3.80200 3.4907 -13.51 -37.12 1.6736 -5.89 130.90 77.31 -7.61210 3.6652 -19.75 -34.21 1.7214 -8.63 130.11 75.20 -11.43220 3.8397 -25.39 -30.26 1.7649 -11.12 129.13 72.23 -15.26230 4.0143 -30.26 -25.39 1.8028 -13.29 128.07 68.42 -19.03240 4.1888 -34.21 -19.75 1.8338 -15.07 127.08 63.77 -22.64250 4.3633 -37.12 -13.51 1.8567 -16.38 126.26 58.35 -25.95260 4.5379 -38.90 -6.86 1.8709 -17.19 125.72 52.24 -28.77270 4.7124 -39.50 0.00 1.8756 -17.47 125.53 45.57 -30.87280 4.8869 -38.90 6.86 1.8709 -17.19 125.72 38.52 -32.03290 5.0615 -37.12 13.51 1.8567 -16.38 126.26 31.33 -32.06300 5.2360 -34.21 19.75 1.8338 -15.07 127.08 24.27 -30.82

310 5.4105 -30.26 25.39 1.8028 -13.29 128.07 17.64 -28.26320 5.5850 -25.39 30.26 1.7649 -11.12 129.13 11.71 -24.42330 5.7596 -19.75 34.21 1.7214 -8.63 130.11 6.78 -19.43340 5.9341 -13.51 37.12 1.6736 -5.89 130.90 3.08 -13.51350 6.1086 -6.86 38.90 1.6229 -2.99 131.42 0.78 -6.92360 6.2832 0.00 39.50 1.5708 0.00 131.60 0.00 0.00

degrees per second

rod length =Equations for Piston Displacement,

RPM = revolutions per minutestroke divided by 2

crank stroke =radius =



pistonaccelerati

on(m/s^2)(dividedby 1000)

31.230.428.124.619.914.4

8.52.7-2.7-7.3

-11.1-13.8-15.6-16.6-17.1-17.2-17.2-17.1-17.1-17.1-17.2-17.2-17.1-16.6-15.6-13.8-11.1-7.3-2.72.78.5

14.419.924.628.130.431.2



-40.00

-20.00

0.00

20.00

40.00

60.00

80.00

100.00

0 30 60 90 120 150 180 210 240 p i s t o n

d i p l a c e m e n

t , v e

l o c

i t y , a c c e

l e r a

t i o n

( m m

, m

/ s e c ,

m / s e c ² / 1

0 0 0 )

crank rotation (degrees)

Piston Position, Velocity and Accelerationvs. Crank Rotation Angle

TDC BDC



270 300 330 360

displacement

velocity

acceleration

origin @ TDC

TDC

Documents

TWE compression calculator.xls