Forged or Not, how to tell? 4a-gze Vs 1g-gze

[oldcorollas]

so you are saying that you can tell the metallurgy of a piston based on a visual inspection?

i didn't think you were that naive

you know the shape and finish of semi-solid forming and forging (in this application) are virtually identical? and that you can't tell them apart without seeing the microstructure?

apparently not


ps, you didn't used to own a 20V did you?

[kingmick]

What im saying is that if you sat that 5ag piston upside down next to a CP,SRP etc it isnt hard to tell which is a forged high quality piston!
There is no need to blast a forged high quality piston thats been CNC'ed
Just my opinion!

[oldcorollas]

What im saying is that if you sat that 5ag piston upside down next to a CP,SRP etc it isnt hard to tell which is a forged high quality piston!
There is no need to blast a forged high quality piston thats been CNC'ed
Just my opinion!

thats the point.... it IS hard to tell (but of course, some forged pistons have a different look due to the design of the skirt but...)
this piston was aftermarket treated by the person who bouight them, by the company called WPC. maybe there was no need to, but they did it anyway, and it has no bearing on it being forged or not...

actually.. there may be merit to bead blasting a CNC'd forged piston... since you really don't want sharp machinig marks from the CNC in there...

your opinion seems to be confused?

anyway, back to the topic.
you say the 4AGZE pistons are not forged and are semi-solid somethinged.

please back up your claim with actual proof, (not visual inspection, even if you do have X-ray vision)

[kingmick]

So is the 5ag a semi forged?

[oldcorollas]

Cp-piston with drag marks
forged ross with similar internal finish
ofcourse there are the different skirt designs...
and even more non-standard designs for weight saving..
and of course this is obviously cast..
but saying you can tell the metallurgical history by eye is bollocks (sorry to be blunt but...)

[oldcorollas]

So is the 5ag a semi forged?

absolutely, unequivocally not semi-forged. absolutely no doubt.














cos there is no such thing as semi forged

do you mean partially or half forged? and then machined from there?
specify the process, and i'll tell you if it was possible.
send me a piston and i will analyse it
unlike couch scientists.. actual scientists require some kind of proof before declaring something is true or not

[kingmick]

There not anything ive ever had! the CP must look diffrent because of the flash inside the piston??
Ross well, thats Ross.

You know how this one is made? http://popularhotrodding.com/tech/06...p_piston_z.jpg

So you mean if the 1g piston has casting marks or similar features to the 4agze, like i said in my original post, you wouldn't be able to take a gambit that it was the same type!
My post was to post a pic of the 1g piston upside down! Cant hurt, now can it!

[kingmick]

absolutely, unequivocally not semi-forged. absolutely no doubt.














cos there is no such thing as semi forged

do you mean partially or half forged? and then machined from there?
specify the process, and i'll tell you if it was possible.
send me a piston and i will analyse it
unlike couch scientists.. actual scientists require some kind of proof before declaring something is true or not

Semi solid,semi forged, what ever name does it for you! So is it the same piston process as the gze piston? semi-solid forged?

[30psi 4agte]

Lets face it if they are not forged a 4aGZE Forged or not forged ( i believe forged) Take more abuse than most engine setups/ combos will dish out to them.

FWIW I have been running the same set of 8.9:1 GZE ( forged or not forged )pistons in my 4a running serious boost for near on 4 years now. I have broken almost everything you can break over this time period from allsorts of engine failures.... detonation etc etc !! BUT i am yet to conquer a piston or rod for that matter

to the point where the last engine failure i had was major to say the least ( major lean out caused by nos and melted a head!) and i thought i had broken a piston for sure but......
They survived totaly untouched.----- I still use the same set now !

So forged or not forged they are f##kn TUFF and get my vote.

[oldcorollas]

So forged or not forged they are f##kn TUFF and get my vote.

thats abotu the size of it.... and all most people need to know
if the 1G's are fromt he same era of manufacture, and have similar external and internal (grain structure) appearance, then you can speculate they may have similar abilities.

[love ke70]

they are from the same era. late 80's, early 90's

the rods are just fucking tough as for the size of the motor and the pistons (From my limited experience looked fuggin tough) and you just have to look at the abuse 6BOOST's ones are taking to realise that the big end oiling is about the only thing that stops big power from these motors

however, if you are serious about big power, i would be looking for the safety net that you will get from the forgies.

[kingmick]

thats abotu the size of it.... and all most people need to know
if the 1G's are fromt he same era of manufacture, and have similar external and internal (grain structure) appearance, then you can speculate they may have similar abilities.

So your saying exactly what was in my post?
"Turn them upside down and take a picture and ill tell you what i think! The 4agze have wipe marks so the 1g should have the same if made alike!".

Thanks for that!

[stradlater]

thats abotu the size of it.... and all most people need to know
if the 1G's are fromt he same era of manufacture, and have similar external and internal (grain structure) appearance, then you can speculate they may have similar abilities.

BINGO, that's all I needed to know. Hehe.

[30psi 4agte]

Not that familiar with 6boost's setup but thats the jist of it i recon.

If you know of other people using the pistons without drama you'd be fairly safe with using them.

I dont recal reading it but... are 4a pistons interchangeable with the 1G ???

[Karma Supra]

Will some pics up close of a properly cleaned 1G-GTE piston help this thread? I happen to have one on my coffee table at home.... one of those "manly" ornaments that the other half hates!!! I also have the rod that went with it....