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Hot To Tell Poncams Vs Procams

wrxkilla

By wrxkilla,
in Engines & Forced Induction

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wrxkilla Mentor

wrxkilla

Posted
Posted

Hi All

I have snapped the cas locator thing on my 264 tomei exh camshaft.

absolutely gutted i m stupid.

anyway - i want to order a new camshaft - how do i know if its a poncam or a procam?

how can i tell the difference???

help is much muhc appreciated.

thanks

Michael

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wrxkilla Mentor

wrxkilla

Posted
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ah really? you make me happy dougboy :rolleyes:

so they can weld this little locator thing back on or something?

Tighe Cams - they in brissie? i will try find em in yellow pages....

thanks v much

mick

blind_elk Grand Master

blind_elk

Posted
Posted

All you need to do is imagine where the half-moon bit sits inside the front of the cam. Then visualise where the matching one inside the CAS has to sit to align with it.

The CAS will still work because they also mesh on a spline setup.

wrxkilla Mentor

wrxkilla

Posted
  • Author
Posted

ah ok i see

i thought it was like the half moon type thing that gripped and turned it.

ok i have just had a shower and cleaned up, so i will have a look this afternoon after lunch.

thansk very much, now i see what T04R was saying to me in the other thread.

thansk guys

will let you know how it goes.

thankyou

michael

muck Community Regular

muck

Posted
Posted
All you need to do is imagine where the half-moon bit sits inside the front of the cam. Then visualise where the matching one inside the CAS has to sit to align with it.

The CAS will still work because they also mesh on a spline setup.

thats exactly it... my 33 had the same problem..... lined it up where it should be.. and never gave me any dramas...

T04GTR Grand Master

T04GTR

Posted
Posted

cool. poncams have 9.15 mm lift. and iether 260 or 252.degrees

procams have longer duration and more lift. if your head has been machined around the buckets for hi-lift cams its a procam. if it hasnt its a poncam.

they all look like factory cams.(they use factory cast blanks and machine them to there profile.)

except for a part number stamped in the back of them.

as far as im aware tomei dont do a 264.

they do 252.260.270.280.290

there procam range has 3 levals of lift in the 260.( 9.15. poncam),10.25,10.80)

the 10.25 and 10.8mm ones use a 30mm base circle on the cam.

get out the virniers and mesure the lobe size.

wrxkilla Mentor

wrxkilla

Posted
  • Author
Posted

thanks for the info on the cams t04gtr. i will inveestigate more.

mine defo have stamped 264 on the end. not sure they are tomei tho they was sposed to be.

will check that out soon...

Regards the prob, thanks for the advice - have the CAS back on and started the car, lined up the splines and off i went.

car doesnt feel 100%, but ive prolly stuffed up the timing....

so will get into a garage and have em reset it.

thanks v much

michael

wrxkilla Mentor

wrxkilla

Posted
  • Author
Posted

well im a total spanker.

i have never had crank angle sensor off before. and didnt really realise there was this locator thing. just thought it was splined.

And i was re-fitting it it was tuff to go in. (obviously i didnt re-align it)

And i thought it was just tuf going through the seal thing around the hole on the cam gears cover. so i rubber hammerd it in with two hits. bam straight in.... so obviously schnap.

:P

what a spanker.

mick

wrxkilla Mentor

wrxkilla

Posted
  • Author
Posted

well the cas is on atm and the car appears to run fine.

the way i see it the half moon lip thisng is just a locator anyway???

all the load so to speak is on the splines?

anyway, will talk to the people in the know, and will buy a new bloody camshaft if i have too! hehehe

i always make expensive mistakes! clown

mick

StageZilla Rising Star

StageZilla

Posted
Posted
well the cas is on atm and the car appears to run fine.

the way i see it the half moon lip thisng is just a locator anyway???

all the load so to speak is on the splines?

anyway, will talk to the people in the know, and will buy a new bloody camshaft if i have too! hehehe

i always make expensive mistakes! clown

mick

sounds like my sorta luck :D

  • 4 weeks later...

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