TRuST

I complied a list of cams specs from either their repective web sites or postings, but I would like you opinion if these specs are correct ? Or if you could provide the mugen, or another cams specs to add to the list.

Toda A's
INTAKE lift - 11.6 mm, duration - 250 @ 1mm
EXHAUST lift - 11.2mm, duration - 240 @ 1mm

Toda B's

INTAKE lift - 12 mm,duration - 255 @ 1mm
EXHAUST lift - 12 mm, duration - 245 @ 1mm

Toda C's

INTAKE lift - 12.5 mm,duration - 255 @ 1mm
EXHAUST lift - 12.5 mm, duration - 255 @ 1mm

Toda Spec D

INTAKE lift - 12.9 mm, duration - 268 @ 1 mm
EXHAUST lift - 11.9 mm, duratin - 272 @ 1 mm


Jun Type 1

INTAKE lift - 10.9 mm, duration - 265.3 @ 1mm
EXHAUST lift - 10.0 mm, duration - 268 @ 1mm

Jun Type 2

INTAKE lift - 12.0 mm, duration - 266.6 @ 1mm
EXHAUST lift - 10.9 mm, duration - 265.3 @ 1mm

Jun Type 3

INTAKE lift - 12.0 mm, duration - 265.3 @ 1mm
EXHAUST lift - 11.5 mm, duration - 265.3 @ 1mm


Spoon Integra VTEC cam

INTAKE lift - 11.53 mm, duration - 256 @ 1mm
EXHAUST lift - 11.13 mm, duration - 245 @ 1mm

Skunk2 cams

Stage I

INTAKE lift- 11.58 mm, duration 252 @ 1mm
EXHAUST lift - 10.9 mm, duration 249 @ 1mm

Stage II
INTAKE lift- 12.07 mm, duration 265 @ 1mm
EXHAUST lift - 11.6 mm, duration 256 @ 1mm

Stage III

INTAKE lift- 12.7 mm, duration 273 @ 1mm
EXHAUST lift - 11.5 mm, duration 273 @ 1mm


Crower 63403

INTAKE lift - 11.98 mm, duration - 246 @ 1mm
EXHAUST lift - 11.83 mm, duration - 238 @ 1mm

ITR

INTAKE lift - 11.5 mm, duration - 240 @ 1mm
EXHAUST lift - 10.5 mm, duration - 235 @ 1mm

CTR

INTAKE lift - 11.5mm, duration - 243 @ 1mm
EXHAUST lift - 10.5 mm, duration - 235 @ 1mm

RS cams
INTAKE lift - 12mm, duration - 294
Exhuast lift - 11.5mm, duration - 296




Modified by TRuST at 12:28 PM 7/6/2003

sgT

Toda A's

INTAKE lift - 11.6 mm, duration - 250 @ 1mm
EXHAUST lift - 11.2mm, duration - 240 @ 1mm

Toda B's

INTAKE lift - 12 mm,duration - 255 @ 1mm
EXHAUST lift - 12 mm, duration - 245 @ 1mm

Toda C's

INTAKE lift - 12.5 mm,duration - 255 @ 1mm
EXHAUST lift - 12.5 mm, duration - 255 @ 1mm


These are the correct figures




[Modified by sgT, 1:01 PM 10/31/2001]

Big Phat R

You forgot the JUN cams! (checked their website but nothing is listed there in terms of cam specs for Honda....everything but actually)

sgT

TYPE1

INT (300) 10.9
EXH (300) 10.0

TYPE2

INT (300) 12.0
EXH (300) 10.9

TYPE3
INT (304) 12.0
EXH (304) 11.5

All of the duration figures are TOTAL duration. not at lift.

STOLEN - ITR 98-0652

Thanks for that - both of you.

Big Phat R

Mr T.....I pity the fool who thinks my Mandinkan haircut is ridiculous! heh heh

TRuST

I know what duration and lift is, but how is it related to their performance or the type of powerband they produce ?

I figure more lift and duration gives better topend performance at a higher RPM compared to a cam with less lift and duration.

CPR

So wait, for what lobes are these specs for?


[Modified by CPR, 1:39 PM 10/31/2001]

SpecR_EK

Great info!

If possible could someone post up the specs for the non-vtec lobes of these cams?

TRuST

For the biggest lobes.

sgT

THESE ARE TOTAL DURATION FIGURES

TYPE1
INT (240) 5.3 (300) 10.9 (256) 8.5
EXH5 (260) 8.0 (300) 10.0 (244) 4.8
TYPE2
INT (240) 5.3 (300) 12.0 (260) 8.0
EXH (252) 8.0 (300) 10.9 (244) 4.8
TYPE3
INT (240) 6.5 (304) 12.0 (252) 9.0
EXH (252) 8.7 (304) 11.5 (240) 6.2

Spec A
INT (220) 6.0 - (290) 11.6 - (240) 9.0
EXH (220) 5.5 - (280) 11.2 - (240) 8.5

Spec B
INT (250) 11.0 - (295) 12.0 - (250) 11.0
EXH (250) 11.0 - (285) 12.0 - (250) 11.0

Spec C
INT (250) 11.0 - (295) 12.5 - (250) 11.0
EXH (250) 11.0 - (295) 12.5 - (250) 11.0

TRuST

Jun doesn't have alot of lift, but a sh*t load of duration.




[Modified by TRuST, 2:37 PM 10/31/2001]

Stock-DC2

It is nice and cool to have all the cams spec, but can someone here explain to me what can I get out of from the cams spec and how can I use the specs to decide which cams is best for certain application or purpose?

i 4

damn, vtec is aggressive on JUN Type 3's .

Night Kid

yes, i would also like to know what these cams spec means so i could learn more..

TRuST

Here's my knowledge limited and rudementary explaination of lift and duration. (please correct me if I am wrong), but I'll give it a shot. Let's take the ITR cam and the Toda Spec C's cams for an example.

Lift: How high the valves move up and down.

Duration: how long the valves stay open.

Toda C's

INTAKE lift - 12.5 mm,duration - 255 @ 1mm
EXHAUST lift - 12.5 mm, duration - 255 @ 1mm

ITR

INTAKE lift - 11.5 mm, duration - 240 @ 1mm
EXHAUST lift - 10.5 mm, duration - 235 @ 1mm

If you think about it like this as your RPM goes up so does the RPMs of the cams. The higher the RPMs go the less time fuel and air is allowed into the combustion chamber. Now the higher lift and longer duration provides more time to allow fuel and air in at a high RPM compared to a cam with less duration and lift. Which is why a certain cams perform much better at a higher RPM than others.

How does this apply to our example. The ITR cam HP peaks around 8200 and doesn't produce any more power after 8200 rpms, where as Todas would continue to make power because of it higher duration and lift at RPM higher compared to the ITR cams.

Another, variable that I don't know much about would be the overlap, which is when both intake and exhaust valve is open. At this point, the cam designers try to use a scavenging effect to try to draw the exhaust out and cause a vacuum to suck in Air and Fuel.

Sorry, its a little incomplete but that my limited knowledge of cams.

Here's a link that goes over the basics of cams.
How cam's work


[Modified by TRuST, 3:05 PM 11/1/2001]

SpecR_EK

Again thans for the info

Stock-DC2

Thanks for the info.

But I guess what I tried to get at is which one is more important? More lift or more duration. So what is the benefit for having a high lift, but little bit less duration, and what is the advantage for having high duration but less lift?

I ask because from the specs, this is the main different between JUN and TODA cams.

FAST94GSR

You don't want one and not the other. You want a perfect combination of both.

Yellow3TypeR

Here's a website that I found listing all the specs for those cams http://www.allmotorhonda.com/techpages/camspecs.htm

uNF$@#!

where are the spec d's?

2dark2bslow

yeh, i want specs on d's nuts too