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Tomei Poncam Markings

DECIM8

By DECIM8,
in Engines & Forced Induction

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DECIM8 Grand Master

DECIM8

Posted
Posted

Well I finally got my hands on a set of Tomei Poncamshafts they are second hand and wondering if they are original as I cannot find any document to support its markings.

I figure from assumption that these are real, one because the guy is really honest and two sort of makes sense.

So the Markings are either a 115 or A2691XR which I figure "2691" stands for.. 260 duration and 9.15 lift i.e 26.91

But I wanted confirmation from someone as I know Poncams are not TOMEI stamped but PROCAMS are so making it harder.

If someone could confirm this for me please?

Cheers

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https://www.sau.com.au/forums/topic/220558-tomei-poncam-markings/
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The Dan Grand Master

The Dan

Posted
Posted
physical difference you can measure is the cam gear drive on the poncams was larger than standard (we had to drill the cam gears out)

WTF??? You don't drill them out.

Were you using aftermarket gears?

and to answer the other guys question. Just measure the cam yourself and find out what lift/duration it has.

GTR1993 Mentor

GTR1993

Posted
Posted (edited)
Well I finally got my hands on a set of Tomei Poncamshafts they are second hand and wondering if they are original as I cannot find any document to support its markings.

I figure from assumption that these are real, one because the guy is really honest and two sort of makes sense.

So the Markings are either a 115 or A2691XR which I figure "2691" stands for.. 260 duration and 9.15 lift i.e 26.91

But I wanted confirmation from someone as I know Poncams are not TOMEI stamped but PROCAMS are so making it harder.

If someone could confirm this for me please?

Cheers

Is A2691XR stamped on the rear of the camshaft? Thats exactly what mine had.

I think if u do a search for say 2691 I think it will bring up a forsale thread where a guy has those part numbers listed on his tomei cams.

Edited by GTR1993
The Dan Grand Master

The Dan

Posted
Posted
No measuring tools, and no standard shaft to measure against i.e still in engine.

R33 you nicked my sig!!!

You don't need a standard shaft.

You do need measuring tools. And just calculate the duration and lift. But anyway, have fun with your new cams

NYTSKY Grand Master

NYTSKY

Posted
Posted

There were no marking on mine either. I was a bit shocked when we pulled them out a few months later, i was thinking the guys who originally put them in ripped me off and i was using that excuse for the 10-15rwkw we were missing before to after.

But it was all good after we measured them :P

Good to see you finally got them Nathaniel,but dont be suprised if you dont see a big difference on the dyno. The pedal and through the bum of your seat is where you will notice the difference. Not as must pedal needed to get up to certain speed ect.. I noticed the improvement more when i was driving the car off boost.

NYTSKY Grand Master

NYTSKY

Posted
Posted
Thanks Dave, I never intended to take the car to this level (but am already looking further) any improvement will tickle a smile from my face.

Thanks for the help peoples.

Noone ever does,once the bug has bitten there is no turning back.

DCIEVE Mentor

DCIEVE

Posted
Posted
WTF??? You don't drill them out.

Were you using aftermarket gears?

and to answer the other guys question. Just measure the cam yourself and find out what lift/duration it has.

os giken gears, the drive on the poncams was significantly larger than the standard cams

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