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The development for NB8 before M/C is completed. Realize the performance
in all range which is not in the past! |
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Realize the improvement of performance in all range |
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The maximum output improved by 10PS |
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Need inner shim kit |
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IN.EX + Inner Shim Kit Price |
$ 1,640.00 USD |
Product ContentsFIN Cam/EX Cam/Valve Lifter 16 pieces
(Selection of thickness of shim is needed at the time of order.) |
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| INFO. BROCHURE |
Set Part No. : 143054 |
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| * Click and see huge picture |
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Matching
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| Vehicle Type |
NB8 MIATA MX-5 before M/C(NB1) |
| Engine Type |
BP-ZE |
| Model Year |
Jan. 1998 ~ Jul. 2000 |
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Part Name
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Part No. |
Price |
IN Cam |
1497256100 |
$490.00 USD |
EX Cam |
1498256100 |
$490.00 USD |
Lifter 16 pieces Set |
163041 |
$530.00 USD |
Lifter Unit Price |
161091 |
$30.00 USD |
Shim Unit Price |
1610202000~1610203650 |
$11.00 USD |
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* We have shim by 0.05mm unit to 2.000~3.650. |
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PERFORMANCE
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| ‘Examed and developed "NA Likeness" in all range. |
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Quick Response |
c |
Great response which reacts to acclerator in an instant. |
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Middle Range Stabilized and Flat |
c |
Smooth middle range |
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Blow to High R.P.M. |
c |
Top range blow to red zone |
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IN252 EX256 |
c |
High Performance : Lift 10.0mm |
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| ‘It can be used with the same feeling as STD. |
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Idling Stability |
c |
Compatible in performance and idling. |
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Allophone Reduction |
c |
Tappet noise is controlled by high precision design. |
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INSTALLATION
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| ‘Bolt On F Show high performance only by easy cam exchange. |
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Change into Inner Shim |
c |
It is stabilized and corresponds to high lift. We have each size shim. |
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Valve Spring Exchange Needless |
c |
Use of STD |
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Valve Timing Adjustment Needless |
c |
It is proved by complete test. |
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Head Modify Needless |
c |
Modifing of head is needless entirely. |
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ECU STD Use |
c |
STD ECU also realizes high performance. |
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SPEC |
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IN/EX |
Duration |
Lift |
Lobe Center Angle |
Base Circle |
TOMEI |
IN |
252 |
10.0mm |
110 |
Σ33mm |
EX |
256 |
10.0mm |
110 |
Σ33mm |
STD |
IN |
241 |
8.7mm |
110 |
Σ36mm |
EX |
242 |
8.6mm |
110 |
Σ36mm |
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Base Circle Setting |
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The cam of the other company set the base circle size as Σ36, and the
maximum lift as 9.5mm. Although the product which doesn't need an inner
shim kit on the market, it may interfere in the cylinder head about many
cases, and modifing may be needed. Moreover, there is an unsatisfying point
in the performance of 9.5mm. Therefore, we adopt the small base circle
but it need the inner shim kit, realize the high lift 10.0mm, demonstrate
high performance, and realize no head modifing. |
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Valve Timing Setting |
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We tested dozens of times on the engine dyno and the chassis dynamo. In responses, torque, and power, set the great valve timing to achieve high performance. To demonstrate high performance in the state of bolt on installation without adjustment of valve timing. |
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By the test, experimented in various duration, lift, or valve timing.
Although the red line surpasses peak power, the blue line product "IN252 type" surpasses with the output of middle range in the right graph. Although it looks like composition of 256-256 in the graph, it is compatible in high performance in all range and the stability of idling by setting as IN252. Consequently, decided to IN252-9.2mm and EX256-9.5mm.
And realize to exchange into high lift of shim 10.0mm and achieve the high
performance which cannot be compared with STD.
In our company, high performance was caught all over range, and opted for
commercial production.
Repeated Test Result |
| Decided which will be realize the idling stabilized and high efficient in the whole range. |
IN 252-9.2mm
EX 256-9.5mm |
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Copyright (C) 2005 TOMEI POWERED, Inc. All
Rights Reserved. |
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