Tech:Engine/K-Series/TRD

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I'll let TRD do the talking!!!

http://www.vhtracing.com/TRD_K_ENGINE_MANUAL.pdf (Dead link)

http://www.rollaclub.com/hosted/TRD-K-Engine-Manual.pdf (Mirror, 25MB)

Link by Taz_Rx

Transcription

Stage I

Without altering the displacement (1,166 cc), the pistons have been established to increase the compression ratio.

Cylinder Head Gasket, Piston & Piston Rings

(1) Main modifications

a. Cylinder head gasket.
Due to increase of compression ratio, the thickness upon assembling has been revised.
b. Piston
Without altering the displacement (75∅ 1,166cc), the compression ratio has been incrased.
c. Piston rings.
Two compression rings with thickness of 1 mm are utilized and the oil ring is of three-piece type with the thickness of 2.5mm.


(2) Required parts.

Description Qty.
Gasket,cylinder head 1
Ring set, piston 4
Piston w/pin 4


(3) Assembling standards.

Item Sports parts S. T. D
Piston clearance mm 0.06~0.08 0.03~0.05
Item Sports parts S. T. D
compression rings Oil ring Compression rings Oil ring
No. 1 No.2 No.1 No.2
Clearance between ring & ring groove (mm) 0.02~0.04 0.015~0.06 0.03~0.07 0.02~0.06 0.015~0.06
Gap clearance (mm) 0.15~0.35 0.20~0.90 0.15~0.35 0.20~0.90

Stage II

Besides the boring of the cylinder block and correction of the valve seats contacting surfaces, parts have been established which are capable for assembling almost without any modification.



1. PISTON & PISTON RINGS

(1) Main modifications.

a. Piston
The oversize is 3mm (78∅) with the displacement of 1,261 cc.
b. Piston rings
Two compression rings with the thickness of 1 mm are utilized.
The oil ring is of three-piece type with the thickness of 2.5 mm.



(2) Required parts.

Description Qty.
Gasket,cylinder head 1
Ring set, piston 4
Piston w/pin 4

(3) Assembling standards.

Item Sports parts S. T. D
Piston clearance mm 0.07~0.10 0.03~0.05
Item Sports parts S. T. D
compression rings Oil ring Compression rings Oil ring
No. 1 No.2 No.1 No.2
Clearance between ring & ring groove (mm) 0.02~0.04 0.015~0.06 0.03~0.07 0.02~0.06 0.015~0.06
Gap clearance (mm) 0.15~0.35 0.20~0.90 0.15~0.35 0.20~0.90

2. VALVE MECHANISM

(1) Main modifications.

a. Camshaft
The revise the valve timing, the cam profiles are revised.
b. Valves
To improve the intake and exhaust efficiency, the head diameters of the intake and exhaust valves have been enlarged.
c. Valve springs.
To prevent surging, revised from single to dual springs and the installed load is revised.
d. Valve spring retainer & spring seat.
Due to the revision of the valve springs from single to dual, the retainer and seat are newly established.

(2) Required parts.

No. Part No. Description Qty. Remarks
1 13511-KE003 Camshaft Either one Overlap 70°
13511-KE051 Camshaft Overlap 66°
2 13711-KE051 Valve, intake 4 Head dia. 37∅
3 13715-KE051 Valve, exhaust 4 Head dia. 30∅
4 90501-42409 Spring, compression (outer) 8 "O"
5 90502-KE501 Spring, compression (inner) 8
6 13734-KE051 Seat, valve spring 8
7 13741-KE051 Retainer, valve spring 8
8 90913-03005 Lock, valve spring retainer 16 "O"

(3) Assembling procedures & assembling standards.

Replace with the above parts.

3. INTAKE & EXHAUST SYSTEMS

(1) Main modifications

a. Intake manifold.
Matched with the carburetor throttle bore, enlarged the ports to reduce the intake resistance.
b. Exhaust manifold.
Revised the shape to improve the exhaust efficiency.


(2) Required parts.

No. Part No. Description Qty. Remarks
1 17104-KP751 Manifold sub-assy. exhaust 1
2 17111-KE051 Manifold sub-assy. intake 1
3 21911-TE001 Gasket, carburetor 8 40∅
4 21912-TE001 Insulator, carburetor heat 4 40∅


(3) Assembling procedures.

Replace with the above parts.


4. FUEL SYSTEM & ACCELERATOR LINKAGE

(1) Main modifications.

a. Carburetor.
Revised the throttle bore to match the specification for high speed driving.
b. Accelerator linkage.
Due to the revision of the carburetor, the shape of the linkage is revised.


(2) Required parts.

No. Part No. Description Qty. Remarks
1 21001-SP001 Carburetor set 1 Dellorto DHLA40 x 2
2 78022-KE002 Linkage set, accelerator 1


(3) Assembling procedures.

Replace with the above parts.


TRD Fig1.png


STAGE III

1. CYLINDER HEAD

(1) Main modifications.

Enlarge the intake and exhaust ports to improve the intake and exhaust efficiency. Also, due to the revision of the valves and valve springs, machined the valve spring seats portions and inserted the valve seat rings and valve guides.

Item Detail Size & etc.
Intake valve Replaced Head dia. 38∅ stem dia. 6.6∅
Exhaust valve " Head dia. 33∅ stem dia. 6.6∅
Valve guide bushing (IN.) " Bore 6.6∅
Valve guide bushing (EX.) " Bore 6.6∅
Valve seat ring (IN.) "
Valve seat ring (EX.) "
Valve spring seat portion Machined Recess machining
Port shape " Grinding for enlarging
Combustion chamber shape " Capacity revised


Caution
At the same time with the modification of the cylinder head, perform the surface grinding of the cylinder block top surface.
(Refer to cylinder block paragraph.)



(2) Required Parts.