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Location:
Adelaide
Registered:
July 2002
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4agze parts/build questions.
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Wed, 10 August 2005 06:57
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I have done some research into purchasing forged pistons, cams and injectors but don't seem to be having much luck. The best prices seem to be out of the states (around AU$700 each for both). Can anyone recommend somewhere closer? What cams are people using for a ZE retaining the supercharger? Are the stock conrods up to the task? I don't want to go crazy with the revs and should not exceed 20psi. What injectors are people using and where did they get them? Any suggestions would be appreciated.
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Location:
Toronto, Downtown
Registered:
September 2004
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Registered:
May 2002
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Re: 4agze parts/build questions.
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Wed, 10 August 2005 07:41
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Injectors: common upsizing includes 440cc (7MGTE), 550cc (13BT), there are others that fit but those are probably the most common used. Suppliers: there are plenty, I got a set of new injectors through my local workshop, I reckon any place thats worth their salt could access what you want. The other option is to get some second handies (forums or importers) and get them cleaned and flow tested.
Cams: Wade are what a guy here is using, his car is getting tuned to day so can't comment on them it's a 4AGTE also. But Wade Cams are local and might be worth chatting to.
The factory forged pistons can be purchased from Toyota (oversized), these are good for 20psi and more  Getting these is good value too as they come in at around the $400 mark for a set. Aftermarket???? I do recall ads in the 4 cylinder mags over the years that advertised forged 4A pistons available locally. Head down the newsagent and have a flip through some mags Zoom, Hot 4's etc.
There are a number of people I associate with running around 20psi or more on stock rods and have done so for a long time (year or more) and have not had any failures. We have had one 4AGTE up over 25psi with no probs (factory pistons, stock rods). I have personally never seen or heard of a 4AGZE rod failure, I am sure it has happened but it can't be too common, they are strong looking compared to most factory rods, beefy.
My engine is internally stock as it came from Japan, it sees up to 21psi, and plenty of rpm, no probs at all. It's been doing this for years 
I read how your engine failed on your trip, I also heard last week of another turbocharged car (not Toyota) have exactly the same sort failure under similar conditions (towing, long period on boost = burnt hole in piston) and it was a stocker.
Good luck with the rebuild, let us know how the whole SC14 thing pans out when you have it sorted 
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 4agze parts/build questions.
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Wed, 10 August 2005 07:42
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the GZE stocko slugs should be nice.. if you are worried, get the lower CR ones instead. rods should be ok..
get a sprintex SC too  i want someone else to try it first
cams, it depends on what rpm range you want...
if SC, too much overlap will defeat the purpose of the SC down low, too little and it chokes up high....
higher lift is nearly always a good thing
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Location:
Adelaide
Registered:
July 2002
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Re: 4agze parts/build questions.
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Wed, 10 August 2005 09:24
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Thanks for the feedback guys. As mentioned, I have recently suffered a piston failure on the stock semi-forged item and will not be replacing with another factory piston. Forged is the way I will be going. Is it worth oversizing? How far can it be taken out? As for the cam, I don't really want to go crazy with springs etc, so nothing to psycho. I am after top end though. I will contact wade and see what they recomend. I will persevere with the SC14 and will probably go Emanage or something Jacar for injector compensation. I want to go with as small an injector as I can get away with so I will have to do the maths when I get a bit closer and can double confirm lambda measurments. What head gaskets are people using?
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: 4agze parts/build questions.
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Wed, 10 August 2005 09:44
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ACL now does forgies for the 4ag and they retail for around $650 with rings! billet cams are around the $750 each toda do good cams. injectors just get 7mgte ones.
mick
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Location:
Adelaide
Registered:
July 2002
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Re: 4agze parts/build questions.
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Fri, 12 August 2005 11:01
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Thanks Mick. If cams are going to be that expensive I think I will give them a miss. I will try wade first and see what they have to say.
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