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Registered:
December 2002
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4ac head on a 7afe block??
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Sat, 21 December 2002 13:05
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Hey guys i've got a crazy idea, but i'm unsure if it will actually work out as i think it will... The reason i'm planning to go down this road as opposed to the 4agze path is i want something different, as the car is a ae82 sedan so with an engine with some mumbo it should make a good sleeper. The info I'm unsure of is weather the head will line up with the block.. the plan after that is to put the biggest holley possible on the engine. Am i dreaming or is this a crazy but possible idea??
Thanks
Billus McFlunday
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Location:
Darwin
Registered:
November 2002
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Re: 4ac head on a 7afe block??
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Sun, 22 December 2002 01:59
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the conversion has been done a few times, if you do a search on this forum you will find a decent discussion about the conversion as well as links of people that have done it!!
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Location:
Townsville, Queensland
Registered:
September 2002
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Re: 4ac head on a 7afe block??
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Sun, 22 December 2002 04:53
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isn't the 4A-C head the one everyone puts crap on (the one I have in my car). Its the non cross flow SOHC head from the carby powered sprinters and AE82's (and it in some Tercels!). I would think putting a 4A-C head on a 7A-FE would be not a real good idea, where as if you mean a 4A-GE head onto a 7A-FE that has been done before and you are better off sticking with EFI on the 4A-GE head (from what I have heard).
With regards to big Holley on a 4A-C (if thats what you mean) I put a 32/36 on mine and it did not make that much difference other than a little more power, the induction sound and fuel usage (standard carb was totally stuffed though). Would need to do head/manifold work to get it to make a big diff.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 4ac head on a 7afe block??
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Sun, 22 December 2002 05:17
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4AC head on the 7A block... maybe the idea of this is to build torque through massive restriction increasing air velocity (and killing it at about 3000rpm)? If that were the case, then a holley carb would be kind of not quite the thing... Actually, on any 4 pot engine, a big arse holley carb wouldn't be quite the thing...
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Location:
Adelaide
Registered:
May 2002
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Re: 4ac head on a 7afe block??
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Sun, 22 December 2002 05:39
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Ive never understood the desire for people to be different, even when it flies in the face of sense and reason.
Back to the point, No offence to you buddy. But this is bloody stupid idea.
Some facts,
The 4AC makes a lowly 56kw at the best of times, Its low power output caused primarily by a SOHC, non X-flow head that flows no better than a piece of wet cardboard.
The 7AFE is a 1800cc twincammer which is X-flow an makes about 80kw or so (i think).
To be honest you'd be better leaving the 7AFE dead stock. What you propose would be just like having a 1800cc 4AC. Which certainly doesnt give me an erection i could be proud of.
Now, a 20V or 4AGE head on a 7AFE block is something much more sensible. Some decent side draught carbs (cheap, no need for an aftermarket ECU) and some extractors and you're on you're way.
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Location:
Sydney, OZ
Registered:
May 2002
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Re: 4ac head on a 7afe block??
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Thu, 26 December 2002 12:43
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Bill,
I'll have to agree with Rex, a 4AC head on a 7A, It would be the most wasteful amount of money and time ever!! The easiest, cheapest and most sensible way of a simple of plonking a 7AFE into a 4AC AE82, would be to bolt a 4AFC carbie and manifold on the 7AFE and toss the EFI. This way you have a More modern twin cam, X-flow engine which would easily eat your Idea.... Of course, the 7AGE would be the best choice and would cost the same as a 4AC headed 7A and beat any of these ideas.
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Location:
Townsville, Queensland
Registered:
September 2002
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Re: 4ac head on a 7afe block??
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Fri, 27 December 2002 06:13
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4A-C manifold would not fit on a 7A-FE head as the inlet ports are totally different. Even though I have never taken the manifold off a 7A-FE I am 99.999999999999999% it would not work as they look totally different (7A-FE being X-flow and all).
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Location:
Sydney, OZ
Registered:
May 2002
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Re: 4ac head on a 7afe block??
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Fri, 27 December 2002 08:46
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would be to bolt a 4AFC carbie
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Didn't I say 4AFC?? Which do fit...
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Location:
Adelaide
Registered:
July 2002
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Re: 4ac head on a 7afe block??
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Sat, 28 December 2002 16:07
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| Johnny wrote on Fri, 27 December 2002 19:16 |
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would be to bolt a 4AFC carbie
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Didn't I say 4AFC?? Which do fit...
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hehehe tercelboy got drilled
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Location:
Townsville, Queensland
Registered:
September 2002
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Re: 4ac head on a 7afe block??
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Sun, 29 December 2002 11:46
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Not trying to pick a fight but wasn't the question "Re: 4ac head on a 7afe block??". A 4A-C being a SOHC carby engine (in other words the crap I own). Only really replying to the original post and voicing my opinion. Sorry if I missed your "F".
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