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Location:
Blacktown, Sydney
Registered:
December 2003
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: head work worth doing ??
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Mon, 05 January 2004 01:24
 
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what engine, what type of cam gears?
on the surface it sounds like a good deal
and your injectors and fuel pump should be fine, depending on how worked your engine already is
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Location:
Blacktown, Sydney
Registered:
December 2003
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Location:
Brisbane
Registered:
May 2002
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Re: head work worth doing ??
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Mon, 05 January 2004 03:03
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On a stock 4A-GE that will probably net you 2 or 3 hp if you're lucky. That's not much bang for your buck...
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Location:
Wollongong
Registered:
November 2002
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Re: head work worth doing ??
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Tue, 06 January 2004 01:37
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You could fit some 2nd hand high comp pistons for about that price..
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: head work worth doing ??
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Tue, 06 January 2004 14:53
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standard reco price for a head with twin cams should be around $240-250
i didn't think you would want to open up the intake ports any more... maybe a little off the exhausts, but i was under the impression that the ports were pretty good from factory.
not sure how much adjustable cam gears are, but i would not expect them to be more than a couple of hundred, even from japan.
$1500 sound a little exxy for my liking, but then again, it's not hard to do a port clean up....
so are you advancing or retarding your cams???
Cya, Stewart
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: head work worth doing ??
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Tue, 06 January 2004 20:39
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who's doing the port & polish??
i think that with most characters claiming to do this, you've got a 33 1/3% chance of it actually being an improvement, and 66 2/3% chance of it being worse or the same.
even in OZ dollars that sounds pretty pricey with new valves & guides, and i've got a feeling it doesn't include them.
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Location:
Blacktown, Sydney
Registered:
December 2003
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Re: head work worth doing ??
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Wed, 07 January 2004 13:54
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ahhh i see i see ... thanks alot for the help guyz but i think im going to pass this since i dont think it would be worth doing based on your oppinions ...
i was going to get it done at Hi Comp in metchenbury ... the guy der has done alot of 4age's though so yeah thatz why i was going to take it der ...
once again thanks for all the help ...
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Location:
NSW, East Coast
Registered:
July 2003
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Re: head work worth doing ??
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Wed, 07 January 2004 15:28
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Try here, http://www.workin4u.com/jhh/castro.html
If you take the head off and send it to them, i think he said $880.
Ive been searching for a while for best bang for buck for my 4ag, and apart from forced induction this is the only thing ive found that even seems reasonable.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: head work worth doing ??
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Wed, 07 January 2004 17:16
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| Quote: |
The engine in this Corolla is standard except for the cylinder head modified to STREET FORCE spec. At the time of head fitment the engine received new rings and bearings, the cams were left standard and the ecu unmodified.
The car went to a dyno and with minor adjustments to ignition timing , the engine produced close to 21kw increase at the wheels.
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wow, 21kw at the wheels increase with stock cams?? the engine must have been totally shagged to start with... at least they did say it had a rebuild at the same time 
hmm, at toymods dyno day, i remember 86kw 4AG's were getting around 55kw atw...
then again, maybe they know something that no-one else does..
problem for all you 4AG kiddies is that your motor is half decent to start with.. and whatever you do, you are getting small % gains..
now if you start with a crap motor like a 4K, you can easily double the output   LOL
Cya, Stewart
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Location:
NSW, East Coast
Registered:
July 2003
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Re: head work worth doing ??
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Thu, 08 January 2004 02:32
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| oldcorollas wrote on Thu, 08 January 2004 04:16 |
| Quote: |
The engine in this Corolla is standard except for the cylinder head modified to STREET FORCE spec. At the time of head fitment the engine received new rings and bearings, the cams were left standard and the ecu unmodified.
The car went to a dyno and with minor adjustments to ignition timing , the engine produced close to 21kw increase at the wheels.
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wow, 21kw at the wheels increase with stock cams?? the engine must have been totally shagged to start with... at least they did say it had a rebuild at the same time
hmm, at toymods dyno day, i remember 86kw 4AG's were getting around 55kw atw...
then again, maybe they know something that no-one else does..
problem for all you 4AG kiddies is that your motor is half decent to start with.. and whatever you do, you are getting small % gains..
now if you start with a crap motor like a 4K, you can easily double the output LOL
Cya, Stewart
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They also mentioned a 14.59 1/4mile at 152km, which i would say is worth $880.
Now i know driver skill is important but 14.59 is dam quick in my opinion for a n/a 4ag.
So im guessing they might know something other people may-not.
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Location:
Blacktown, Sydney
Registered:
December 2003
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Re: head work worth doing ??
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Thu, 08 January 2004 03:23
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haha yeah thatz what i was thinking ... coz i have spoken to quite a few people and they said to get 10kw at the wheels extra i will have to spend alot of $$$ and that $800 does kinda sound really cheap ... dont get me wrong ... if they can increase my kw that much then i will definately do it ...
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Location:
Brisbane
Registered:
May 2002
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Re: head work worth doing ??
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Thu, 08 January 2004 03:24
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If you think head work alone is going to get you into the 14's, you're going to be disappointed. I don't care how much they know, it takes more than head work to do that!
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: head work worth doing ??
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Thu, 08 January 2004 03:32
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fair nuff..
take the car to an independent dyno before the head work. then get the kw at the wheels increase IN WRITING from them before they do the work, and get them to GUARANTEE the increase they claim. then get the car dynoed after the head work at the same dyno with the same specs and variables and day temperature as before.
then go back and demand to have your money refunded
seriously tho, they claim that atfer fully rebuilding a completely shagged motor (new rings and bearings), they got 21kw increase.. they don't say what the actual figure was beforehand, or after..
they seem to know what they are doing, but to expect 21kw atw with just porting, when the ports are already pretty good (we are talking a minimum of 20-25% increase in power here) is a fair whack.
maybe if they took out the spare tyre, and the seats and a bit more weight, it would help, but... then again, maybe i'm just cynical
so what hp would be required to got a stock AEwhatever it is (82/92?) into 14's??? is that hp realistic with their claims?
be objective and critical with "performance claims" otherwise we'd all have those "supermagnet fuel molecule straighteners"
Cya, Stewart
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Location:
Blacktown, Sydney
Registered:
December 2003
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Re: head work worth doing ??
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Thu, 08 January 2004 03:33
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chilax ... i was'nt aiming for 14's ... i know that is impossible with my kind of budget ... i was just wondering if head work was worth doing ...
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