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Location:
Perth,western australia
Registered:
December 2003
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2tg cams
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Sun, 13 June 2004 09:44
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hi,
i have a set of 2tg cams and im trying to figure out if they are standard or something more sporty.
i searched the arhives and checked out my t series manual but i dont know what the specs i have mean so i cant match it up at all!!
heres what ive got:
running clearance: in .008" ex .008"
lift @lobe in .410" ex .410"
advertised timing
ex opens 75deg closes 43deg
in opens 45deg closes 73deg
setting specs
inlet valve lift @TDC on teh over lap .168" ex .147"
can any one help me out with this??
any insite woudl be great.
cheers,
Dom
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Location:
On your mum!
Registered:
May 2002
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Re: 2tg cams
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Sun, 13 June 2004 10:43
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That seems a bit hot for standard cams - but they may well be something out of Toyota - maybe toyman75 will be able to assist beyond that.
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Location:
MACKAY
Registered:
May 2002
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Location:
Perth,western australia
Registered:
December 2003
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Re: 2tg cams
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Sun, 13 June 2004 15:04
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i got these cams off a mate.
he got them with an 18rg he bought.(extra,they were'nt in it).
we thought they 18rg cams and i was going to compare them to a spare set of 2tg cams that i have.
we wanted to see if 18rg cams would fit in a 2tg.
i then discovered the grind tag giving all the details of them.
i have a 2tgeu with K&N air filter and extractors.
standard ecu and everything else,
whats the best way to raise the compression as was suggested??
cheers,
Dom
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Club President
I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 2tg cams
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Mon, 14 June 2004 12:26
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Dom,
So you ended up with those ! They actually sound like a pretty tuff set of cams. They are way bigger than any stock 2TG grind.
Compare the cam lift to these stats:
Cam Shaft:
Lobe Height In 45.87 ~ 45.97 (Up to April 1973)
Lobe Height In 46.37 ~ 46.47 (April 1973 Onwards)
Lobe Height Ex 45.87 ~ 45.97 (Up to April 1973)
Lobe Height Ex 46.37 ~ 46.47 (April 1973 Onwards)
Cam Lift:
In 9.82 (Up to April 1973)
In 10.27 (April 1973 Onwards)
Ex 9.82 (Up to April 1973)
Ex 10.27 (April 1973 Onwards)
The "Up to April 1973" is the 88220 head.
The "April 1973 Onwards" is the 88222 head.
These figures are of course for the GT TA22 Celica 2TG's. I am yet to confirm it but the 88222 cams are supposed to be the "biggest" of any 2TG. But like I said I am yet to confirm this.
Your cams have 10.414mm lift.
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Club President
I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 2tg cams
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Mon, 14 June 2004 12:38
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Dom,
Mate if you are going to change compression by replacing the pistons then it would be the perfect time to fit the 3T crank. The increased displacement will go a long way to making that cam more drivable. Increased displacement will add torque to help carry the addd lift and duration. I wouldn't go anymore than 10.5:1 compression if you intend to keep using pump fuel (98 Octane)
In Tina's it was only 9.8:1 but it dealt with bigger cams than you have there. (Camtech L1 Cosworth Race grind) admittedly it had next to nothing below 4500 RPM.
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Location:
Perth,western australia
Registered:
December 2003
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Re: 2tg cams
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Mon, 14 June 2004 15:00
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cheers mate.
i have a 1ggze that im going to drop in at some point once i have built to tewh hilt and done a fair bit of body work.
id say 6months to a year before i take my celica of teh road to do this(got to get a hilux and a bigger shed first!!)
so im trying to make this as cheap as possible.but im figuring that its gonna cost me teh same to get a 3t re ringed(and pistons flycut)as it is do it to the 2tg block.i have a 3t block already.
the rings on my 2tg arent that great and she blows a bit o smoke.
would i need to fly cut the 2tg pistons to run this cams if i were to stick with the 2tg block/pistons?
woudl it be better to put the 3t crank into teh 2t block?and stick with 2tg pistons etc?i wouldnt be boring out at all.
cheers.
Dom
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Location:
On your mum!
Registered:
May 2002
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Re: 2tg cams
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Tue, 15 June 2004 09:14
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Rod, the difference between the stock 10.27mm cams and these ones is 6 thou - nothing really in terms of lift.
The 298 degrees of duration seems like it is pretty big. I wonder if any one know for sure what the duration of the standard cams are "seat to seat", and also the factory overlap.
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Location:
MACKAY
Registered:
May 2002
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Re: 2tg cams
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Tue, 15 June 2004 13:44
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Standard 2TG cams Before april 1973:- IN opens 20 BTDC Closes 48 ABDC 248 degrees duration ,Exhaust Opens 52 BBDC Closes 16 ATDC .
After April 73 :- Intake Opens 16 BTDC Closes 60 ABDC 256 Degrees Duration , Exhaust Opens 60 BBDC Closes 16 ATDC .
Trevor
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Location:
On your mum!
Registered:
May 2002
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Re: 2tg cams
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Tue, 15 June 2004 22:43
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Thanks for that Trevor. I knew 296 degrees of duration is getting pretty big, but I thought that the factory 2TG cams would have had more duration - like has been said, these ones are considerably bigger.
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Club President
I supported Toymods
Location:
Sydney
Registered:
May 2002
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 Re: 2tg cams
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Wed, 16 June 2004 00:58
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Sorry Guys,
I should have specified that the Duration was the major difference. I just didn't have the stock duration figures handy so couldn't make a comparison.
Thanks fo rthose Figures Trev, I have never had a chance to stop and work that out or reference it.
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