TOMEI PONCAM EJ255 JDM/EJ257 WRX STI 04-07 USDM AVCS 252-10.3mm

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TOMEI PONCAM EJ255 JDM/EJ257 WRX STI 04-07 USDM AVCS 252-10.3mm

TOMEI PONCAM EJ255 JDM/EJ257 WRX STI 04-07 USDM AVCS 252-10.3mm

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EJ25 Single AVCS JDM / USDM

Click to enlarge

Conformity:
EJ 255 JDM
EJ 257 WRX STI 04 - 07 USDM

Features of PONCAM

■ Use of special materials
■ High precision grinding
■ Valve timing adjustment completed
■ Valve spring exchange unnecessary
■ Full range high performance
■ Excellent acceleration performance
■ Stable idling
■ Effective use of variable valve timing

Compliance	Part number
EJ 255 JDM EJ 257 WRX STI 04 - 07 USDM	143062

Currently developing further high-spec pro cams.

Prototype comparison test

In developing this cam, three types of prototypes required from the theoretical value were prepared, and a comparative test was conducted for each.

Observation

In the normal intake system, intake restriction occurs with peak at 6000 revolutions.

Therefore, a cam with a wide working angle does not exhibit its effect.

The problem of interference with the PV clearance and the cam cap occurs also in the cam with the high lift.

Conclusion

Specified as IN / EX 252 - 10.4 which exerts the maximum effect in normal head and does not require bolt-on mounting or machining.

Click to enlarge

SPEC

Duration of operation (degree)	Maximum cam lift (mm)	IN / EX	Maximum valve lift (mm)	Cold cam clearance (mm) [± 0.01]	Baltai initial set value central angle (degrees)	Remarks
252	10.3	IN	10.20	0.20	125 °	AVCS compatible
252	10.3	EX	10.05	0.35	115 °

SKU	143062
Brand	TOMEI
Shipping Weight	12.0000kg
Shipping Width	0.170m
Shipping Height	0.080m
Shipping Length	0.690m
Shipping Cubic	0.009384000m3

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