 4AGZE forged pistons in a 7AFE...., fitting... |
 Aug 31, 2003 - 10:56 AM
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 Enthusiast  Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%)  |
Hi, I found 4 pistons in perfect shape out from a 1991 AE92 4AGZE engine.
I heard many times that the 4AGZE pistons fit the 7AFE (the bore is the same). my questions are: will I need little mods to the upper rod hole to fit the pistons? the CR rated for those pistons is 8.9:1....now...with the 7AFE head, will this CR be the same? Thanks to all! |
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Sep 1, 2003 - 1:52 AM
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 Enthusiast Joined Oct 28, '02 From Europe, Lithuania Currently Offline Reputation: 8 (100%) |
Edo, you are one lucky mot*******
 How did you find them???
-------------------- Ex celica owner - just a guy from other side of the pond...
Full custom Projects from restoration to performance builds <<<<<< DCw / JDMart >>>>>>> |
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Sep 1, 2003 - 2:08 AM
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 Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
there were some on e-bay for like $50 a while back...
Jon |
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Sep 1, 2003 - 4:35 AM
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Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
 eheh  Anyway....anyone has answer to my quests??? Thanks
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Sep 1, 2003 - 4:46 AM
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Enthusiast Joined Aug 16, '03 From Bay area Currently Offline Reputation: 0 (0%) |
what car did that come out of?
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Sep 1, 2003 - 5:15 AM
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Enthusiast Joined Oct 28, '02 From Europe, Lithuania Currently Offline Reputation: 8 (100%) |
MR2 or Levin, they both used 4A-GZE engines.... -------------------- Ex celica owner - just a guy from other side of the pond...
Full custom Projects from restoration to performance builds <<<<<< DCw / JDMart >>>>>>> |
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Sep 1, 2003 - 5:41 AM
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Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
out from a 1991 AE91 Levin
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Sep 2, 2003 - 10:56 PM
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Enthusiast Joined Jul 31, '03 From Panama City Beach, FL Currently Offline Reputation: 1 (100%) |
the stock c/r on a 7a-fe is 9.5-1 if your planning on turboing then the 4a pistons would be perfect. also, from what ive seen the pistons should press right on to your 7a rods, but im not 100% on that. by the way, if you want forged rods be prepared to pay about $700 for a custom set. hope this helps.
db This post has been edited by DustyBurns30: Sep 2, 2003 - 10:59 PM |
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Sep 3, 2003 - 4:46 AM
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Enthusiast Joined Aug 16, '03 From Bay area Currently Offline Reputation: 0 (0%) |
what are the cons of forged pistons?
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Sep 3, 2003 - 10:21 AM
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 Enthusiast Joined May 17, '03 From Florence, KY Currently Offline Reputation: 0 (0%) |
I've heard that with some forged pistons you will get a little bit of knock because they swell slightly. That was with custom forged pistons for a 5s-fe though. Yours are factory made so it may not be a problem.
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Oct 1, 2003 - 5:15 AM
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Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
There is someone who know if the CR of 8.9:1 of 4AGZE pistons will be the same once fitted in 7AFE, since the head is different?
Thx
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Oct 1, 2003 - 1:08 PM
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 Enthusiast Joined Aug 29, '02 From Dallas, Tx Currently Offline Reputation: 0 (0%) |
You're probably going to have to check with a machine shop to be sure. If you take all your parts to them they would be able to tell you. The pistons may not work if the wristpin hole is in a different location than the 7a pistons. Assuming the wrist pin is in the same location and you're using a stock 7a head gasket then yes, you will have the benefit of the lower compression ratio given by the gze pistons.
Forged pistons do expand more than cast pistons therefore they have to run larger piston to cylinder clearances and they should be warmed up before running hard. |
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Oct 5, 2003 - 4:52 AM
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Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
Thx!!
does anyone know which is the wrist pin diameter in 7afe?? |
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Oct 6, 2003 - 10:25 AM
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Enthusiast Joined Apr 22, '03 From W. Chester - Ohio Currently Offline Reputation: 0 (0%) |
What about a throttle bodie from a 4age engine will that make a difference?
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Oct 6, 2003 - 11:26 AM
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Enthusiast Joined Dec 21, '02 From Italy Currently Offline Reputation: 0 (0%) |
Even better would be quad throttle bodies!!!!!
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