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Location:
Epping, Sydney
Registered:
August 2002
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 cams for small port 4AGE
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Tue, 12 November 2002 00:01
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when i bought my car the dude gave me some cams for it and said some shit like "uh they're the right size so you dont have to use a new computer i think they are bargwanna group a racing cams" but that's it and it sounds like he was spinning shit, i know that this should mean that they are under 273' but in regards to the precise lift and duration i am in the dark. how do i measure them, i have a micrometer and a dial gauge but that is about it, if they are legit i would also like to fit them so what is involved there, also i read somewhere about a 127hp small port version of the 4age and was curious about identifying these particular engines. And finally what sort of power would a red top small port 4AGE make with these cams in a FWD rolla,
thanks fellas
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Club Member
Location:
sydney
Registered:
May 2002
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Re: cams for small port 4AGE
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Tue, 12 November 2002 01:11
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Ok lets clear up what I do know and what I doubt is correct...
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i think they are bargwanna group a racing cams"
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this sounds like complete trollop ..... as far as I am aware Bargwanna has never driven a 4AGE powered vehicle in a group A class, he came out of carts and formula ford/holden and 3000 series to V8.. none of which run a toyota engine.
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know that this should mean that they are under 273'
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if the cam is up to 272 degrees and about 7.6mm lift it should be able to stay within the parameters of the factory ecu of a map sensored computer, I think a AFM will handle it even better.
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how do i measure them
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ok first measure the base circle to get standard hight, then measure the lift..from the bottom of the base circle to the highest point of the cam lobe then subtract the base circle from the lift measurement and that gives you total lift , as for the degree thats a bit harder and maybe you should take it to camtech or someone to figure it out for you if you dont have the tools to do it yourself. its likely to be a bit more accurate this way.
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And finally what sort of power would a red top small port 4AGE make with these cams in a FWD rolla,
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thats hard to say because every engine runs differently and has different setups...best bet is to find out if theyre legit and throw them on if theyre ok and bring the car to the next dyno day
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Location:
Melbourne
Registered:
May 2002
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Re: cams for small port 4AGE
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Tue, 12 November 2002 02:06
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just take the cams to a cam grinder and get them clocked up - then you'll know for sure what the are.
trd billets etc are stamped, so i assume these are weldups?
T
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Location:
Sydney
Registered:
May 2002
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Club Member
Location:
sydney
Registered:
May 2002
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Re: cams for small port 4AGE
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Tue, 12 November 2002 11:03
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I stand corrected  ..that didnt show up in his Bio I read but it may have been out of date? 
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Location:
Epping, Sydney
Registered:
August 2002
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Re: cams for small port 4AGE
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Thu, 14 November 2002 01:16
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Ok now, the cams are in front of me as i type...
On the exhaust cam there's the numbers "3107" in raised (about 0.25mm) writing on a 0.25mm raised rectangle, and i think the lift is about 7.45 (measured dodgily with my dad's dial guage), and the intake cam has "K.F. 6750" stamped into it, as well as a rectangle in the same place as the exh. cam, with 3897 raised on top of it. The lift on this one is about 7.35... but i'm probably pretty out with those measurements.
I snapped my timing belt yesterday but no valve mashing sounds were heard. I didn't think this was possible, dont the pistons hit the valves if the timing belt snaps? Anyway, provided everything is ok, i'll put the cams in when i put on the new belt, as long as this is possible. I am not far from a dyno so i'll hopefully limp it to there to get tuned... If it goes.
Any comments, advice etc from here?
Thanks
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Club Member
Location:
sydney
Registered:
May 2002
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Re: cams for small port 4AGE
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Thu, 14 November 2002 07:48
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Standard cam sizes are usually about 7.5mm (7.49) so there is definately no difference in your lift figures...not to say that the duration may be different though. K.F "could"? be a kelford cams mark but im not sure exactly how the stamp them.
4AGE's run a non interferance head so it is possible to break the belt and not damage the valves. It would still pay to pull it apart and have a good look though.
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Location:
Epping, Sydney
Registered:
August 2002
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Re: cams for small port 4AGE
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Fri, 15 November 2002 04:03
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Ok, i measured the lift properly and it's 7.6mm on both cams, still no idea about the duration though. Any ideas as to how i'd find out if they are kelford's? the phonebook might help. Forgive me if i'm an idiot, but what exactly is an interface head? My understanding was that if the valves were allowed to open for too long (I.e. the belt snaps/timing way out) the pistons would smash up into them and bend everything out of whack, do interface heads have large enough combustion chambers so that the valves can be open when the piston is all the way up? Any ideas?
Thanks Loads
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Club Member
Location:
sydney
Registered:
May 2002
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Re: cams for small port 4AGE
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Fri, 15 November 2002 23:07
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As mentioned previously the best and most accurate way to check the duration is to take it to a cam specialist and get them to dial it up. 7.6mm usually ten to be up to 272 degrees but thats no gaurauntee. You could try calling kelford and ask them if they know what it is?.
A non-interferance head is where the tolerances between the head and the piston hight is set so that if the cam belt breaks the pistons can move up and down without striking the valves when they are open..this is no gaurauntee as parts wear and stretch with heat and age so its always best to pull it apart and check it properly.
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