4agze pistons ina 7afe???, will they fit? Options

[doGGy]

CR ratio was CONFIRMED like 10 times already, but it seems like no one read about it as well:

Using Arians 4AGE low comp pistons with 1 mm oversize in 7AFE Edo got 11.01 CR.

I counted what using 4AGZE stock bore pistons you could get at 10.8 CR

Using 2 mm headgasket from HKS and 4AGZE pistons (stock bore), (4AGE headgasket) the CR could be droped at 9.6

K, time to write it again.

As i know for now im the only one who TRYED TO PUT GZE pistons in the 7A.

First: EVERYTHING FITS LIKE IT SHOULD BE.

!!!!!!BUT!!!!!!

I used GZE (or GE)20mm wrist pin pistons. The wrist pin of the GZE is the same diameter as the 7A pins. BUT wrist pins of the GZE (or GE) pistons are FULL FLOATING, 7A pins are PRESS FITED. Difference is what 4AGZE rods have coper/bronze insert in the top of the rod, AND wrist pins float in it, and there is the oiling chanel in the rods for oiling the pins. 7A rods DO NOT have pin insert, DO not HAVE oiling cuz pin is pressure fitted and DOESNT move in the rod pistons move on the pin.

Then puting GZE (or GE) pistons MIND one thing: GZE pistons pins are full floating, so the restriction of the pin floting is in the piston. Then you press fit the GZE pins in the 7A rods - you get what the pistons dont have enouth of movment then they are cold (basicly pistons are stuck on the rods and kinda hard to move by hand if they are cold, but its enouth to heat them up a bit and they start to move...) This was the main reason what i aint used these pistons in my project (cuz i wanted to turbo my engine faster and aint had time to solve all this )

BUT, i asume using your STOCK 7A Pins with along GZE pistons - everything should and i say SHOULD be good... i dont know yet, i will try later about this...

Good luck guys.
[right][snapback]350743[/snapback][/right]

We already know this, what about the compression ratio? That's the question that hasn't been confirmed.

-Doc
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[nik]

I'M WITH DOGGY on this one it has been covered to death before

[Dr_Tweak]

Well sorry I asked, but every single time I tell people that you can't put GZE pistons in a 7A and have 8.5:1 compression they jump all over me, so I wanted to make sure I know what I'm talking about.

Such as these posts taken from THIS VERY THREAD:

Using 4AGZE pistons in a 7AFE will give you 11:1 compression. However, if you swap a 4AGE head on there, you'll be all set, 8.5:1 or 8.9:1 depending on which version you use. Plus the GE head is better anyway.
[right][snapback]276757[/snapback][/right]

you pulled those numbers from where?
[right][snapback]276789[/snapback][/right]

Using 4AGZE pistons in a 7AFE will give you 11:1 compression. However, if you swap a 4AGE head on there, you'll be all set, 8.5:1 or 8.9:1 depending on which version you use. Plus the GE head is better anyway.
[right][snapback]276757[/snapback][/right]

do you have any info to back that up i know edo's comp rose but what proof do you have on the 4ag head ??
[right][snapback]276953[/snapback][/right]

exactly ^^
[right][snapback]276955[/snapback][/right]

This post has been edited by Dr_Tweak: Nov 1, 2005 - 12:54 AM

[nik]

Well sorry I asked, but every single time I tell people that you can't put GZE pistons in a 7A and have 8.5:1 compression they jump all over me, so I wanted to make sure I know what I'm talking about.

Such as these posts taken from THIS VERY THREAD:

Using 4AGZE pistons in a 7AFE will give you 11:1 compression. However, if you swap a 4AGE head on there, you'll be all set, 8.5:1 or 8.9:1 depending on which version you use. Plus the GE head is better anyway.
[right][snapback]276757[/snapback][/right]

you pulled those numbers from where?
[right][snapback]276789[/snapback][/right]

Using 4AGZE pistons in a 7AFE will give you 11:1 compression. However, if you swap a 4AGE head on there, you'll be all set, 8.5:1 or 8.9:1 depending on which version you use. Plus the GE head is better anyway.
[right][snapback]276757[/snapback][/right]

do you have any info to back that up i know edo's comp rose but what proof do you have on the 4ag head ??
[right][snapback]276953[/snapback][/right]

exactly ^^
[right][snapback]276955[/snapback][/right]

[right][snapback]351274[/snapback][/right]

we just need to add the info to the stickies in this section