best gze to turbo

[scope]

hi

i've read on here that there are two types of 4agzes (one being map, other afm) and i've also heard that one runs compression ratio of 8.0:1 and other 8.9:1 (please correct me if i'm getting something wrong along the way)

i'm wanting to convert a 4agze to turbo but i am unsure what one would be best so i have questions:

1) is the 8.0:1 gze map or afm?
2) which is better for turboing? map/afm?

i'm wanting to run around 15-20psi on standard internals, possibly using some type of link computer in the future (haven't really thought that far..)

thanks for any help

[crnkin]

The early one is map, the late one is map, but I forget if early is 8.0:1? i think its 8.0:1 anywhos

The best to turbo is much of a muchness, but when you think bout it you get more power at the same boost on a higher comp and the 8.9 will easily take 20psi, so yeah

but map has less restriction for lower boost....

(im running high comp at 25psi, so im a bit biased, but go for high comp )

[scope]

The early one is map, the late one is map

oh real , i'll take a guess that the later one is afm?

[rage]

one has issues with the ecu losing power at about 5500rpm

do a search.

[crnkin]

The early one is map, the late one is map

oh real , i'll take a guess that the later one is afm?

hehe afm, sorry bro im doing an assignment due tomorrow hehe

[crnkin]

GRRRRRRRRRR i mean late is afm



AFM is the one which looses power about 5500 rpm i think but thats with the sc12 on it

[scope]

do a search.

if people would sticky good posts then people like you would have to stop saying "do a search" as when you search (as i did) there were 279 posts to go through and as you might imagine it wouldn't be hard to accidently slip past the one that answered my questions?

[scope]

GRRRRRRRRRR i mean late is afm



AFM is the one which looses power about 5500 rpm i think but thats with the sc12 on it

thanks

[pidge]

Early is AFM, late is MAP.

from club4ag
AW11 was AFM + dizzy ignition, 8:1 CR, no oil squirters
AE92 88-90 was AFM + DLI, 8:1 CR, no oil squirters
AE92 90-91 was MAP + DLI, 8.9:1 CR, oil squirters, smaller SC pulley
AE101 was MAP + DLI, 8.9:1 CR, oil squirters, smaller SC pulley, lightened conrods (apparently), snap ring pistons.

AE101 and late AE92 had the hotly-debated-as-to-what-the-hell-they-mean-by "semi-forged" coated pistons

The best bottom end and pistons are in the AE101.

If you want AFM, you would be best to take the early AE92 one, as it has DLI, unless you really want oil squirters and AFM, in which case you would need the early AE92 engine, but swap in any of the AE92 (late), or AE101 4AGZE blocks.

If you are going for an after market ECU, just use the AE101 or late AE92 engine with a MAP ECU.

[Crucible]

one has issues with the ecu losing power at about 5500rpm

do a search.

My Truenos ae101 Map, and its definately got that problem!...... Bugger

Turbo + 4AGZE = Bazda or Evlgtz

[matt dunn]

GRRRRRRRRRR i mean late is afm



AFM is the one which looses power about 5500 rpm i think but thats with the sc12 on it

thanks

Yes Thanks,

but both pieces of your information are wrong.

The early are AFM, the later ones are Map,

and it's the map one's that loose the power.

[Malcolm]

AE101 and late AE92 had the hotly-debated-as-to-what-the-hell-they-mean-by "semi-forged" coated pistons

I think the common sense answer to that is that they're semi-solid forged, which means they'd be less work-hardened than forged pistons (ie softer), but still with a superior grain structure than cast and machined or plain cast pistons.

[EVLGTZ]

GRRRRRRRRRR i mean late is afm



AFM is the one which looses power about 5500 rpm i think but thats with the sc12 on it

nope thats the MAP version on both accounts. And power drop is still there with turbo setup unless using an aftermarket ecu or ya get around it using other methods.

[EVLGTZ]

whoops should of read entire post before posting hehe

[Caveman]

All of them are good for turbo.

AFM is the one that doesn't loose power as already stated.

The early ones have pathetic manifolds and plemuns and should be replaced with bigport or small port manifolds (depending on which 4agze you have), plemuns and throttle bodies if going turbo. The reason they are so crap is the sc is in the way and theres very little room.

[crnkin]

GRRRRRRRRRR i mean late is afm



AFM is the one which looses power about 5500 rpm i think but thats with the sc12 on it

thanks

Yes Thanks,

but both pieces of your information are wrong.

The early are AFM, the later ones are Map,

and it's the map one's that loose the power.

DOH

ah well shit happens im so tired. long nite!
(and i was sure grotty's ae101 has afm....)

[crnkin]

AE101 was MAP + DLI, 8.9:1 CR, oil squirters, smaller SC pulley, lightened conrods (apparently), snap ring pistons.

AE101 and late AE92 had the hotly-debated-as-to-what-the-hell-they-mean-by "semi-forged" coated pistons

The best bottom end and pistons are in the AE101.

If you want AFM, you would be best to take the early AE92 one, as it has DLI, unless you really want oil squirters and AFM, in which case you would need the early AE92 engine, but swap in any of the AE92 (late), or AE101 4AGZE blocks.

If you are going for an after market ECU, just use the AE101 or late AE92 engine with a MAP ECU.

ae101 definitely has tiny conrods. And is has "semi forged pistons" how on earth is that better to turbo than a lower comp (i like higher tho!) fully forged piston, bigger rod'ed early model block???

I reckon run the high comp pistons (late) with the early model mega rods, for ultimate reliability that is, and the secret is-

redtop same as early model (non tvis but the tvis ones are way better than late models anyways)
and late model are same as silvertop. Although i have both sets and the part number is one digit different (ze ends in a 1, silvertop ends in a 2)

[Bazda]

late model ae92 redtop has the big rods, so to the ae101 (not the gze) have the big rods as well. The rest are smaller. I'm pretty sure thats how it goes.

I jsut recon you run 25psi on high compression you will start having reliablity problems, head warp etc.

[vvega]

this eould have to be one of the most ful of shit threeds ive read in a while

\
v

[vvega]

the 101 comes with the large rods
the 101 facelift has the n/a rods
all the gze's have hyperutectic pistons
they all have the same crank
the 101's have the oil squirters
only the first aw11(excluding facelift)snd the ae-92 gtz is afm(i think) the rest are all map

smaller rods do not mean there weaker
lower compresson is not always better
and finally
toyspeed is not the place to come for engine building advice
unless you just wanna blow shit up.............

v