Engine 7afte V.s 4agze

7afte V.s 4agze

which would be better in the long run, they both will cost about the same, so which is easier? can i use my stock 7a tranny w/ the gze ? also which will yeild more power? thanks

-Jeremy

gze will last longer...... has a much better built bottom end.... much torquier down low, but less overall HP (for the most part.... depends on what turbo you go with on a 7afe, what boost level, and what the cfm rating is at that boost level).... the 7afte would probably be a bit faster, but would cost less to gain much more HP.... a gze's stock block can take quite the beating.... an mr2 (aw11) owner stripped the sc and ran a smaller turbo (can't remember) and dyno'd at 225rwhp at only 15psi with a stock 4age head and gze block.....

in the long run, the 4AGZE will be better. However, the 7AFTE is easier. Yes, you can use the 7A tranny, but it makes more sense to use the one that came with the 4AGZE off the Corolla Levin. The 4AGZE will give more power since it has forged low compression pistons and strong rods, but the 7AFE is weaker.

will 4agze pistons fit in the 7a??

simple
4agze meant for boost
7afe NOT

Um... Yes, the 4AGZE pistons do work with with the 7AFE. Several searches I just did agree with me.

is up to u man....U can go turbo with a 7afe and then do and internal upgarde but the 4agze is nice to more torq but on the run last hp...Will uihave a 7afe turbo and boosting 5lbs day drive its nice man....I'll be finsihing my internals by this spring..

i am gonan do the 7afte but i am goin to put in 4agze pistons, that will make the max psi level that i can use higher, this car will be a beast! anyone know where i can get the pistons and rings cheap??

Toyota

You can check with your local parts store too, they might actually have them. IIRC they're not too expensive. And I spent the last several minutes checking this, I am 100% sure you can use the 4AGZE pistons with the 7AFE. Here's a link that might interest you: http://www.twincam.org/forums/index.php?showtopic=9681

I can give you a hand if you like, just email me joshua@phoenixtuning.com

cheap? no...... and what you should try to find (unless you're going with over 20psi) are 8.9:1 gze pistons, not the US 8.0:1

and yes, they fit.... the bore is the same, the 7afe has a taller stroke than the 4a's

no

<br />
yea...ur'e right.

how much power do you think i can make with this settup?

If you tune it carefully and are using 93 octane, then you could get over the 200 hp mark without too much trouble.

thats great, JDL you have email....what is the max PSI i can run on this settup?

You'll have to keep an eye on your a/f ratio and your EGT. A knock sensor is a good idea too. At a point you will not be able to add any more boost without knocking. Once you get that far, turn it back a little bit and that's your limit without going to racing fuel. Just off the top of my head, I've seen people running 15 psi with little to no trouble. Keep in mind that the 7AFE rods are not that strong, so if you want to boost a lot you really should have custom forged rods. Also, before you go crazy with boost, think about other mods. For example, a 20v head will give you a lot more airflow and lot more power.

Just beef up the internals of the 7a block with with either aftermarket or 4agze pistons and paulter rods.. you can get that crap from raceeng.com

the c50/52 transmission can really only take around 200hp... once you start launching you're going to ruin the transmission.... at that point you'll need an E series tranny and axles.... good luck finding those cheap

Yes. Any 4AGE head will fit.

thanks guys for all the help!

except that the 5th valve doesn't do anything.... it's been brought up SEVERAL times on technical forums (which vvti isn't) and many believe the 16V to actually have better airflow....

Yasin is using a 20v head and having better results than a lot of 16v users. You must know him? I agree that for a N/A setup the 16v works just as well and has more parts available cheaper, but for turbo, the 20v seems to work well, at least from what I've seen in real world applications.

go to aussie forums.... a LOT of guys prefer the 16V's over the 20V's.... the way the 5th valve is oriented (so it's been said) actually slows the velocity of air going into the engine and reducing airflow....

of course, if you start getting into forced induction applications you'll always get the response of "just do it right and start with a gze"

Sorry for the newbie questions, but I am just starting to learn about these engines:

If 4A-GZE pistons work in the 7A-FE engine, what compresion ration drop do they cause?

And regarding the 4A-GZE rods. Are they also compatible, same length too?


Thank you.

gze rods..... no..... the 7afe has the same bore, but a longer stroke (going from a 1.6 to a 1.8 has to gain displacement somewhere)

after getting my ae101 4agze running *decently* there's no way a 7afte running under 15psi would keep up....

4agze bottum end- 7afe head, turbo. the pistons will not interchange. the 4agze has bigger wrist pins. the crank also is bigger because it has bigger rod bearing journals(not more stroke but bigger journals). the gze is very good for boost with the oil squirters for the pistons and also has 7 support ribs along the block instead of 4 like the 7a. differ with me if you like, but, check your stats.

If I'm not mistaken the 7A has the same size wrist pin as the 4AGZE. Of course it's possible different years have different sizes, too, so we could both be right. <img src="http://vvti.net/forums/images/smilies/smile.gif" border="0" alt="" title="Smile" />

longer stroke and taller deckheight to accomodate

4 and 7 wrist pin placement differs, so with the 4agze pistons in the 7afe block youll be running a higher compression than if they were in the gze block

am i wrong or no?

im somewhat sure you're right, and you're the real 4ag guy- aren't the wrist pins are bigger? btw- turbo4ag- i got your milk now buddy haha.