Which parts in 4AGZE are low comp.

[Jusdrifn 86]

Hi Guys

Sprinter hasn't moved for a few years now, sold my dirty nissan s15, time to get the sprinter back on the road.

I had big plans for a 4AGTE but I have decided to just get her going asap and not take the time to build it better.

I have a very tired 4AGE with a flogged keyway in the Crank
A decent condition 4AGZE (mainly just engine, no manifolds or supercharger)

My question is, which part of the 4AGZE is low compression, head? pistons? or both?

Would it work for me to rebuild this engine, and use the head from my 100kw 4AGE and take advantage of the 4AGZE 7 rib block, crank, pistons, rods , and better oil flow.
I would be using my existing Manifolds and everything.

Would this be a good high compression engine with a TRD metal 0.5mm gasket? or are the 4AGZE pistons low compression, meaning I have to use the 4AGE ones, and will they fit on the 4AGZE rods?
Would the 4AGZE pistons clear the 4AGE head with a thin gasket?

Also while I am at it, anyone know where to get 0.5mm TRD 4AGE gaskets cheaply? also in need of a new Distributer, the sensors inside where used elsewhere, so I have the cap, just need the sensors inside really, so it can be FWD or RWD shaped.

Thanks in advance for any help
Justin
0410101090
jusdrifn86@gmail.

If anyone has the time to chat about this on the phone it would be much appreciated, PM me your number and I can call.

[Matt-AE86]

Yer, the pistons are the high compression part. Others will fill you in with more info.

[Hen may possibly be a nut]

The only difference between GZE and GE of a given year is pistons, rings and cam covers. So it's just the pistons which dictate CR.

However early GEs used smaller big and small end bearings. So if your existing GE is one of them (these included original AE86 4AGEs) then your pistons wont fit on the ZE rods. Pick up a set of later GE pistons and everything will fit fine.

Also there are basically 2 types of distributor internals, bigport with a 4 tooth wheel and a 24?? tooth wheel, and smallport, 20V etc with 2 single tooth wheels and a 24 tooth wheel. Find whichever you need and go for it. Though I'm unsure if 20V dizzy or internals will physically fit.

Hen

PS, jsut noticed you mentioned you have a 100kw 4AGE now, in that case your pistons will swap fine.

[Jusdrifn 86]

Thanks for your help Hen, answers a lot of questions..
I now have to be 100% on the fact that my 4AGE is definitely the 100kw version..

Guess I will do some work on it this Friday and find out the hard way.

If I was just going to use the same 4age ( I guess it isnt that tired) and just swap the crankshaft for ease of work out of the ZE would this work? if the engine is 100kw so the Big Ends are the right size?

With regard to the dizzy, My AE82 was having problems and I narrowed it down to the dizzy sensors, the rwd dizzy off the sprinter didnt fit on obviously so i swapped the sensors out and the AE86 twin cam no runs sweet as, so they are the internals i need to replace...

[sun_moon]

look at port sizes to know if its 100kw or not justin.

[fixeruperer]

do smallport and bigport have the same combustion chamber size ?
ive only played with bigport heads, i think from memory its 39cc for bigport.

[gumbie]

I use a similar setup, Bigport head and 4agze block/interanls, if you went this route, i would not recommend using a trd 0.5 head gasket as your compression gets abit to high, I run a standard gasket and my comp ratio is 10:5:1. Goes hard as chippies

[sun_moon]

11:1 and above is win compression !

[Sam-Q]

both 16v heads are meant to have the same size chambers, try here for a 0.5mm gasket

http://www.greenline.jp/

I suggest just a 0.8mm gasket though, you are talking about turning it into an atmo engine right?

[gumbie]

11:1 and above is win compression !

Thats abit high lol, bring on blown head gaskets :D

[Jusdrifn 86]

I use a similar setup, Bigport head and 4agze block/interanls, if you went this route, i would not recommend using a trd 0.5 head gasket as your compression gets abit to high, I run a standard gasket and my comp ratio is 10:5:1. Goes hard as chippies

Which pistons are you using? 4agze? I thought they were much lower compression for boost... can you explain in a bit more detail which main engine parts you used from which engine, I basically have 2 whole engines to make a monster from, except I cannot use my 4age crankshaft (unless need be and I source a new one)

[gumbie]

Which pistons are you using? 4agze? I thought they were much lower compression for boost... can you explain in a bit more detail which main engine parts you used from which engine, I basically have 2 whole engines to make a monster from, except I cannot use my 4age crankshaft (unless need be and I source a new one)

Hey champ, im using 4agze pistons, I have a complete 4agze bottom end minus the turbo/super charger setup and am running a 1m HG, And a massivlely port and polished bigport head.

[Sam-Q]

Which pistons are you using? 4agze? I thought they were much lower compression for boost... can you explain in a bit more detail which main engine parts you used from which engine, I basically have 2 whole engines to make a monster from, except I cannot use my 4age crankshaft (unless need be and I source a new one)

now that one engine you want to build is it with or without a supercharger?

[dr1ft-pig]

i think he wants it normally aspirated

[Hen may possibly be a nut]

...im using 4agze pistons, I have a complete 4agze bottom end minus the turbo/super charger setup and am running a 1m HG


... my comp ratio is 10:5:1

I'm very surprised it's that high. Has the head been shaved a lot? Or anything else done? And how did you measure the CR?

Hen

[gumbie]

I'm very surprised it's that high. Has the head been shaved a lot? Or anything else done? And how did you measure the CR?

Hen

Hey mate, my head has had alot of work lol.. $1500 in total actually or $2300 including the cams.

my mechanic gave me the readings when he built my motor.

[Sam-Q]

you would need to take off like 2mm off the head to have that comp ratio

[gumbie]

Yeah i im pretty sure it was around 2mm shaved.

[Sam-Q]

well that was a good guess

doesnt make sense to me though, the compression is too high for a supercharger and the pistons are heavier than normal 4age pistons which would of kept the head intact.

[gumbie]

If you read up my motor is NA :P

[Sam-Q]

If you read up my motor is NA :P

if that was aimed at me then yeah, what I am saying is would of made a whole lot more sense switching to 4age pistons instead of shaving the head 2mm.